Class FluentConfiguration

  • All Implemented Interfaces:
    Configuration

    public class FluentConfiguration
    extends Object
    implements Configuration
    Fluent configuration for MigrateDB . This is the preferred means of configuring the MigrateDB API. This configuration can be passed to MigrateDB using the new MigrateDb(Configuration) constructor.
    • Constructor Detail

      • FluentConfiguration

        public FluentConfiguration()
      • FluentConfiguration

        public FluentConfiguration​(ClassLoader classLoader)
        Parameters:
        classLoader - The ClassLoader to use for loading migrations, resolvers, etc from the classpath. (default: same as ClassUtils.defaultClassLoader() )
    • Method Detail

      • load

        public MigrateDb load()
        Returns:
        The new fully-configured MigrateDb instance.
      • getLocations

        public Location[] getLocations()
        Description copied from interface: Configuration
        Retrieves the locations to scan recursively for migrations. The location type is determined by its prefix. Unprefixed locations or locations starting with classpath: point to a package on the classpath and may contain both SQL and Java-based migrations. Locations starting with filesystem: point to a directory on the filesystem, may only contain SQL migrations and are only scanned recursively down non-hidden directories.
        Specified by:
        getLocations in interface Configuration
        Returns:
        Locations to scan recursively for migrations. (default: classpath:db/migration)
      • getEncoding

        public Charset getEncoding()
        Description copied from interface: Configuration
        Retrieves the encoding of SQL migrations.
        Specified by:
        getEncoding in interface Configuration
        Returns:
        The encoding of SQL migrations. (default: UTF-8)
      • getDefaultSchema

        public String getDefaultSchema()
        Description copied from interface: Configuration
        The default schema managed by MigrateDB. This schema name is case-sensitive. If not specified, but schemas is, MigrateDB uses the first schema in that list. If that is also not specified, MigrateDb uses the default schema for the database connection.

        Consequences:

        • This schema will be the one containing the schema history table.
        • This schema will be the default for the database connection (provided the database supports this concept) .
        Specified by:
        getDefaultSchema in interface Configuration
        Returns:
        The schemas managed by MigrateDB. (default: The first schema specified in getSchemas(), and failing that the default schema for the database connection)
      • getSchemas

        public String[] getSchemas()
        Description copied from interface: Configuration
        The schemas managed by MigrateDB. These schema names are case-sensitive. If not specified, MigrateDB uses the default schema for the database connection. If defaultSchemaName is not specified, then the first of this list also acts as default schema.

        Consequences:

        • MigrateDB will automatically attempt to create all these schemas, unless they already exist.
        • The schemas will be cleaned in the order of this list.
        • If MigrateDB created them, the schemas themselves will be dropped when cleaning.
        Specified by:
        getSchemas in interface Configuration
        Returns:
        The schemas managed by MigrateDB. (default: The default schema for the database connection)
      • getTable

        public String getTable()
        Description copied from interface: Configuration
        Retrieves the name of the schema history table that will be used by MigrateDB. By default (single-schema mode) the schema history table is placed in the default schema for the connection provided by the datasource. When the migratedb.schemas property is set (multi-schema mode), the schema history table is placed in the first schema of the list.
        Specified by:
        getTable in interface Configuration
        Returns:
        The name of the schema history table that will be used by MigrateDb. (default: migratedb_state)
      • getOldTable

        public @Nullable String getOldTable()
        Description copied from interface: Configuration
        The old table to convert into the format used by MigrateDB. Only used for the "liberate" command.
        Specified by:
        getOldTable in interface Configuration
      • getTablespace

        public String getTablespace()
        Description copied from interface: Configuration
        The tablespace where to create the schema history table that will be used by MigrateDB. If not specified, MigrateDB uses the default tablespace for the database connection. This setting is only relevant for databases that do support the notion of tablespaces. Its value is simply ignored for all others.
        Specified by:
        getTablespace in interface Configuration
        Returns:
        The tablespace where to create the schema history table that will be used by MigrateDb.
      • getTarget

        public TargetVersion getTarget()
        Description copied from interface: Configuration
        Gets the target version up to which MigrateDB should consider migrations. Migrations with a higher version number will be ignored. Special values:
        • current: Designates the current version of the schema
        • latest: The latest version of the schema, as defined by the migration with the highest version
        • <version>? (end with a '?'): Instructs MigrateDB not to fail if the target version doesn't exist. In this case, MigrateDB will go up to but not beyond the specified target (default: fail if the target version doesn't exist)
        Specified by:
        getTarget in interface Configuration
        Returns:
        The target version up to which MigrateDB should consider migrations. Defaults to latest
      • getFailOnMissingTarget

        public boolean getFailOnMissingTarget()
        Description copied from interface: Configuration
        Whether to fail if no migration with the configured target version exists (default: true)
        Specified by:
        getFailOnMissingTarget in interface Configuration
      • getCherryPick

        public MigrationPattern[] getCherryPick()
        Description copied from interface: Configuration
        Gets the migrations that MigrateDB should consider when migrating. Leave empty to consider all available migrations. Migrations not in this list will be ignored.
        Specified by:
        getCherryPick in interface Configuration
        Returns:
        The migrations that MigrateDb should consider when migrating.
      • isPlaceholderReplacement

        public boolean isPlaceholderReplacement()
        Description copied from interface: Configuration
        Checks whether placeholders should be replaced.
        Specified by:
        isPlaceholderReplacement in interface Configuration
        Returns:
        Whether placeholders should be replaced. (default: true)
      • getPlaceholders

        public Map<String,​String> getPlaceholders()
        Description copied from interface: Configuration
        Retrieves the map of <placeholder, replacementValue> to apply to sql migration scripts.
        Specified by:
        getPlaceholders in interface Configuration
        Returns:
        The map of <placeholder, replacementValue> to apply to sql migration scripts.
      • getPlaceholderPrefix

        public String getPlaceholderPrefix()
        Description copied from interface: Configuration
        Retrieves the prefix of every placeholder.
        Specified by:
        getPlaceholderPrefix in interface Configuration
        Returns:
        The prefix of every placeholder. (default: ${ )
      • getPlaceholderSuffix

        public String getPlaceholderSuffix()
        Description copied from interface: Configuration
        Retrieves the suffix of every placeholder.
        Specified by:
        getPlaceholderSuffix in interface Configuration
        Returns:
        The suffix of every placeholder. (default: } )
      • getScriptPlaceholderPrefix

        public String getScriptPlaceholderPrefix()
        Description copied from interface: Configuration
        Retrieves the prefix of every script placeholder.
        Specified by:
        getScriptPlaceholderPrefix in interface Configuration
        Returns:
        The prefix of every script placeholder. (default: FP__ )
      • getScriptPlaceholderSuffix

        public String getScriptPlaceholderSuffix()
        Description copied from interface: Configuration
        Retrieves the suffix of every script placeholder.
        Specified by:
        getScriptPlaceholderSuffix in interface Configuration
        Returns:
        The suffix of every script placeholder. (default: __ )
      • getSqlMigrationPrefix

        public String getSqlMigrationPrefix()
        Description copied from interface: Configuration
        The file name prefix for versioned SQL migrations. Versioned SQL migrations have the following file name structure: prefixVERSIONseparatorDESCRIPTIONsuffix, which using the defaults translates to V1.1__My_description.sql
        Specified by:
        getSqlMigrationPrefix in interface Configuration
        Returns:
        The file name prefix for sql migrations. (default: V)
      • getBaselineMigrationPrefix

        public String getBaselineMigrationPrefix()
        Description copied from interface: Configuration
        The file name prefix for baseline migrations. Baseline migrations represent all migrations with version <= current baseline migration version while keeping older migrations if needed for upgrading older deployments. They have the following file name structure: prefixVERSIONseparatorDESCRIPTIONsuffix, which using the defaults translates to SB.1__My_description.sql
        Specified by:
        getBaselineMigrationPrefix in interface Configuration
        Returns:
        The file name prefix for baseline migration. (default: B)
      • getRepeatableSqlMigrationPrefix

        public String getRepeatableSqlMigrationPrefix()
        Description copied from interface: Configuration
        Retrieves the file name prefix for repeatable SQL migrations. Repeatable SQL migrations have the following file name structure: prefixSeparatorDESCRIPTIONsuffix, which using the defaults translates to R__My_description.sql
        Specified by:
        getRepeatableSqlMigrationPrefix in interface Configuration
        Returns:
        The file name prefix for repeatable sql migrations. (default: R)
      • getSqlMigrationSeparator

        public String getSqlMigrationSeparator()
        Description copied from interface: Configuration
        Retrieves the file name separator for sql migrations. SQL migrations have the following file name structure: prefixVERSIONseparatorDESCRIPTIONsuffix, which using the defaults translates to V1_1__My_description.sql
        Specified by:
        getSqlMigrationSeparator in interface Configuration
        Returns:
        The file name separator for sql migrations. (default: __)
      • getSqlMigrationSuffixes

        public String[] getSqlMigrationSuffixes()
        Description copied from interface: Configuration
        The file name suffixes for SQL migrations. (default: .sql) SQL migrations have the following file name structure: prefixVERSIONseparatorDESCRIPTIONsuffix, which using the defaults translates to V1_1__My_description.sql Multiple suffixes (like .sql,.pkg,.pkb) can be specified for easier compatibility with other tools such as editors with specific file associations.
        Specified by:
        getSqlMigrationSuffixes in interface Configuration
        Returns:
        The file name suffixes for SQL migrations.
      • getJavaMigrations

        public JavaMigration[] getJavaMigrations()
        Description copied from interface: Configuration
        The additional Java-based migrations. These are not Java-based migrations discovered through classpath scanning and instantiated by MigrateDB. Instead these are manually added instances of JavaMigration. This is particularly useful when working with a dependency injection container, where you may want the DI container to instantiate the class and wire up its dependencies for you.
        Specified by:
        getJavaMigrations in interface Configuration
        Returns:
        The additional Java-based migrations. An empty array if none. (default: none)
      • isIgnoreMissingMigrations

        public boolean isIgnoreMissingMigrations()
        Description copied from interface: Configuration
        Ignore missing migrations when reading the schema history table. These are migrations that were performed by an older deployment of the application that are no longer available in this version. For example: we have migrations available on the classpath with versions 1.0 and 3.0. The schema history table indicates that a migration with version 2.0 (unknown to us) has also been applied. Instead of bombing out (fail fast) with an exception, a warning is logged and MigrateDB continues normally. This is useful for situations where one must be able to deploy a newer version of the application even though it doesn't contain migrations included with an older one anymore. Note that if the most recently applied migration is removed, MigrateDb has no way to know it is missing and will mark it as future instead.
        Specified by:
        isIgnoreMissingMigrations in interface Configuration
        Returns:
        true to continue normally and log a warning, false to fail fast with an exception. (default: false)
      • isIgnoreIgnoredMigrations

        public boolean isIgnoreIgnoredMigrations()
        Description copied from interface: Configuration
        Ignore ignored migrations when reading the schema history table. These are migrations that were added in between already migrated migrations in this version. For example: we have migrations available on the classpath with versions from 1.0 to 3.0. The schema history table indicates that version 1 was finished on 1.0.15, and the next one was 2.0.0. But with the next release a new migration was added to version 1: 1.0.16. Such scenario is ignored by migrate command, but by default is rejected by validate. When ignoreIgnoredMigrations is enabled, such case will not be reported by validate command. This is useful for situations where one must be able to deliver complete set of migrations in a delivery package for multiple versions of the product, and allows for further development of older versions.
        Specified by:
        isIgnoreIgnoredMigrations in interface Configuration
        Returns:
        true to continue normally, false to fail fast with an exception. (default: false)
      • isIgnorePendingMigrations

        public boolean isIgnorePendingMigrations()
        Description copied from interface: Configuration
        Ignore pending migrations when reading the schema history table. These are migrations that are available but have not yet been applied. This can be useful for verifying that in-development migration changes don't contain any validation-breaking changes of migrations that have already been applied to a production environment, e.g. as part of a CI/CD process, without failing because of the existence of new migration versions.
        Specified by:
        isIgnorePendingMigrations in interface Configuration
        Returns:
        true to continue normally, false to fail fast with an exception. (default: false)
      • isIgnoreFutureMigrations

        public boolean isIgnoreFutureMigrations()
        Description copied from interface: Configuration
        Ignore future migrations when reading the schema history table. These are migrations that were performed by a newer deployment of the application that are not yet available in this version. For example: we have migrations available on the classpath up to version 3.0. The schema history table indicates that a migration to version 4.0 (unknown to us) has already been applied. Instead of bombing out (fail fast) with an exception, a warning is logged and MigrateDB continues normally. This is useful for situations where one must be able to redeploy an older version of the application after the database has been migrated by a newer one.
        Specified by:
        isIgnoreFutureMigrations in interface Configuration
        Returns:
        true to continue normally and log a warning, false to fail fast with an exception. (default: true)
      • getIgnoreMigrationPatterns

        public ValidatePattern[] getIgnoreMigrationPatterns()
        Description copied from interface: Configuration
        Ignore migrations that match this comma-separated list of patterns when validating migrations. Each pattern is of the form <migration_type>:<migration_state>. See the website for full details.

        Example: repeatable:missing,versioned:pending,*:failed

        Specified by:
        getIgnoreMigrationPatterns in interface Configuration
      • isValidateMigrationNaming

        public boolean isValidateMigrationNaming()
        Description copied from interface: Configuration
        Whether to validate migrations and callbacks whose scripts do not obey the correct naming convention. A failure can be useful to check that errors such as case sensitivity in migration prefixes have been corrected.
        Specified by:
        isValidateMigrationNaming in interface Configuration
        Returns:
        false to continue normally, true to fail fast with an exception. (default: false)
      • isValidateOnMigrate

        public boolean isValidateOnMigrate()
        Description copied from interface: Configuration
        Whether to automatically call validate or not when running migrate.
        Specified by:
        isValidateOnMigrate in interface Configuration
        Returns:
        true if validate should be called. false if not. (default: true)
      • isCleanOnValidationError

        public boolean isCleanOnValidationError()
        Description copied from interface: Configuration
        Whether to automatically call clean or not when a validation error occurs. This is exclusively intended as a convenience for development. even though we strongly recommend not to change migration scripts once they have been checked into SCM and run, this provides a way of dealing with this case in a smooth manner. The database will be wiped clean automatically, ensuring that the next migration will bring you back to the state checked into SCM. Warning! Do not enable in production!
        Specified by:
        isCleanOnValidationError in interface Configuration
        Returns:
        true if clean should be called. false if not. (default: false)
      • isCleanDisabled

        public boolean isCleanDisabled()
        Description copied from interface: Configuration
        Whether to disable clean. This is especially useful for production environments where running clean can be quite a career limiting move.
        Specified by:
        isCleanDisabled in interface Configuration
        Returns:
        true to disable clean. false to leave it enabled. (default: true)
      • getBaselineVersion

        public Version getBaselineVersion()
        Description copied from interface: Configuration
        Retrieves the version to tag an existing schema with when executing baseline.
        Specified by:
        getBaselineVersion in interface Configuration
        Returns:
        The version to tag an existing schema with when executing baseline. (default: 1)
      • getBaselineDescription

        public String getBaselineDescription()
        Description copied from interface: Configuration
        Retrieves the description to tag an existing schema with when executing baseline.
        Specified by:
        getBaselineDescription in interface Configuration
        Returns:
        The description to tag an existing schema with when executing baseline. (default: << MigrateDB Baseline >>)
      • isBaselineOnMigrate

        public boolean isBaselineOnMigrate()
        Description copied from interface: Configuration
        Whether to automatically call baseline when migrate is executed against a non-empty schema with no schema history table. This schema will then be initialized with the baselineVersion before executing the migrations. Only migrations above baselineVersion will then be applied.

        This is useful for initial MigrateDB production deployments on projects with an existing DB.

        Be careful when enabling this as it removes the safety net that ensures MigrateDB does not migrate the wrong database in case of a configuration mistake!

        Specified by:
        isBaselineOnMigrate in interface Configuration
        Returns:
        true if baseline should be called on migrate for non-empty schemas, false if not. (default: false)
      • isOutOfOrder

        public boolean isOutOfOrder()
        Description copied from interface: Configuration
        Allows migrations to be run "out of order". If you already have versions 1 and 3 applied, and now a version 2 is found, it will be applied too instead of being ignored.
        Specified by:
        isOutOfOrder in interface Configuration
        Returns:
        true if outOfOrder migrations should be applied, false if not. (default: false)
      • isSkipExecutingMigrations

        public boolean isSkipExecutingMigrations()
        Description copied from interface: Configuration
        Whether MigrateDB should skip actually executing the contents of the migrations and only update the schema history table. This should be used when you have applied a migration manually (via executing the sql yourself, or via an ide), and just want the schema history table to reflect this.

        Use in conjunction with cherryPick to skip specific migrations instead of all pending ones.

        Specified by:
        isSkipExecutingMigrations in interface Configuration
        Returns:
        true if executing the migrations should be skipped on migrate, false if not. (default: false)
      • getResolvers

        public MigrationResolver[] getResolvers()
        Description copied from interface: Configuration
        Retrieves the custom MigrationResolvers to be used in addition to the built-in ones for resolving Migrations to apply.
        Specified by:
        getResolvers in interface Configuration
        Returns:
        The custom MigrationResolvers to be used in addition to the built-in ones for resolving Migrations to apply. An empty array if none. (default: none)
      • isSkipDefaultResolvers

        public boolean isSkipDefaultResolvers()
        Description copied from interface: Configuration
        Whether MigrateDB should skip the default resolvers. If true, only custom resolvers are used.
        Specified by:
        isSkipDefaultResolvers in interface Configuration
        Returns:
        Whether default built-in resolvers should be skipped. (default: false)
      • getUrl

        public String getUrl()
        Description copied from interface: Configuration
        Retrieves the url used to construct the dataSource. May be null if the dataSource was passed in directly.
        Specified by:
        getUrl in interface Configuration
        Returns:
        The url used to construct the dataSource. May be null if the dataSource was passed in directly.
      • getUser

        public String getUser()
        Description copied from interface: Configuration
        Retrieves the user used to construct the dataSource. May be null if the dataSource was passed in directly, or if dataSource did not need a user.
        Specified by:
        getUser in interface Configuration
        Returns:
        The user used to construct the dataSource. May be null if the dataSource was passed in directly, or if dataSource did not need a user.
      • getPassword

        public String getPassword()
        Description copied from interface: Configuration
        Retrieves the password used to construct the dataSource. May be null if the dataSource was passed in directly, or if dataSource did not need a password.
        Specified by:
        getPassword in interface Configuration
        Returns:
        The password used to construct the dataSource. May be null if the dataSource was passed in directly, or if dataSource did not need a password.
      • getDataSource

        public DataSource getDataSource()
        Description copied from interface: Configuration
        Retrieves the dataSource to use to access the database. Must have the necessary privileges to execute DDL.
        Specified by:
        getDataSource in interface Configuration
        Returns:
        The dataSource to use to access the database. Must have the necessary privileges to execute DDL.
      • getConnectRetries

        public int getConnectRetries()
        Description copied from interface: Configuration
        The maximum number of retries when attempting to connect to the database. After each failed attempt, MigrateDB will wait 1 second before attempting to connect again, up to the maximum number of times specified by connectRetries. The interval between retries doubles with each subsequent attempt.
        Specified by:
        getConnectRetries in interface Configuration
        Returns:
        The maximum number of retries when attempting to connect to the database. (default: 0)
      • getConnectRetriesInterval

        public int getConnectRetriesInterval()
        Description copied from interface: Configuration
        The maximum time between retries when attempting to connect to the database in seconds. This will cap the interval between connect retry to the value provided.
        Specified by:
        getConnectRetriesInterval in interface Configuration
        Returns:
        The maximum time between retries in seconds (default: 120)
      • getInitSql

        public String getInitSql()
        Description copied from interface: Configuration
        The SQL statements to run to initialize a new database connection immediately after opening it.
        Specified by:
        getInitSql in interface Configuration
        Returns:
        The SQL statements. (default: null)
      • getClassLoader

        public ClassLoader getClassLoader()
        Description copied from interface: Configuration
        Retrieves the ClassLoader to use for loading migrations, resolvers, etc. from the classpath.
        Specified by:
        getClassLoader in interface Configuration
        Returns:
        The ClassLoader to use for loading migrations, resolvers, etc. from the classpath. (default: Thread.currentThread().getContextClassLoader() )
      • isMixed

        public boolean isMixed()
        Description copied from interface: Configuration
        Whether to allow mixing transactional and non-transactional statements within the same migration. Enabling this automatically causes the entire affected migration to be run without a transaction.

        Note that this is only applicable for PostgreSQL, Aurora PostgreSQL, SQL Server and SQLite which all have statements that do not run at all within a transaction. This is not to be confused with implicit transaction, as they occur in MySQL or Oracle, where even though a DDL statement was run within a transaction, the database will issue an implicit commit before and after its execution.

        Specified by:
        isMixed in interface Configuration
        Returns:
        true if mixed migrations should be allowed. false if an error should be thrown instead. (default: false)
      • getInstalledBy

        public String getInstalledBy()
        Description copied from interface: Configuration
        The username that will be recorded in the schema history table as having applied the migration.
        Specified by:
        getInstalledBy in interface Configuration
        Returns:
        The username or null for the current database user of the connection. (default: null).
      • isGroup

        public boolean isGroup()
        Description copied from interface: Configuration
        Whether to group all pending migrations together in the same transaction when applying them (only recommended for databases with support for DDL transactions).
        Specified by:
        isGroup in interface Configuration
        Returns:
        true if migrations should be grouped. false if they should be applied individually instead. (default: false)
      • getErrorOverrides

        public String[] getErrorOverrides()
        Description copied from interface: Configuration
        Rules for the built-in error handler that let you override specific SQL states and errors codes in order to force specific errors or warnings to be treated as debug messages, info messages, warnings or errors.

        Each error override has the following format: STATE:12345:W. It is a 5 character SQL state (or * to match all SQL states), a colon, the SQL error code (or * to match all SQL error codes), a colon and finally the desired behavior that should override the initial one.

        The following behaviors are accepted:

        • D to force a debug message
        • D- to force a debug message, but do not show the original sql state and error code
        • I to force an info message
        • I- to force an info message, but do not show the original sql state and error code
        • W to force a warning
        • W- to force a warning, but do not show the original sql state and error code
        • E to force an error
        • E- to force an error, but do not show the original sql state and error code

        Example 1: to force Oracle stored procedure compilation issues to produce errors instead of warnings, the following errorOverride can be used: 99999:17110:E

        Example 2: to force SQL Server PRINT messages to be displayed as info messages (without SQL state and error code details) instead of warnings, the following errorOverride can be used: S0001:0:I-

        Example 3: to force all errors with SQL error code 123 to be treated as warnings instead, the following errorOverride can be used: *:123:W

        Specified by:
        getErrorOverrides in interface Configuration
        Returns:
        The ErrorOverrides or an empty array if none are defined. (default: none)
      • getResourceProvider

        public ResourceProvider getResourceProvider()
        Description copied from interface: Configuration
        Retrieves the custom ResourceProvider to be used to look up resources. If not set, the default strategy will be used.
        Specified by:
        getResourceProvider in interface Configuration
        Returns:
        The custom ResourceProvider to be used to look up resources (default: null)
      • isOutputQueryResults

        public boolean isOutputQueryResults()
        Description copied from interface: Configuration
        Whether MigrateDB should output a table with the results of queries when executing migrations.
        Specified by:
        isOutputQueryResults in interface Configuration
        Returns:
        true to output the results table (default: true)
      • getCreateSchemas

        public boolean getCreateSchemas()
        Description copied from interface: Configuration
        Whether MigrateDB should attempt to create the schemas specified in the schemas property.
        Specified by:
        getCreateSchemas in interface Configuration
        Returns:
        true to attempt to create the schemas (default: true)
      • getLockRetryCount

        public int getLockRetryCount()
        Description copied from interface: Configuration
        The maximum number of retries when trying to obtain a lock. -1 indicates attempting to repeat indefinitely.
        Specified by:
        getLockRetryCount in interface Configuration
      • getJdbcProperties

        public Map<String,​String> getJdbcProperties()
        Description copied from interface: Configuration
        Properties to pass to the JDBC driver object
        Specified by:
        getJdbcProperties in interface Configuration
        Returns:
        Properties that will be passed to the JDBC driver object
      • getFailOnMissingLocations

        public boolean getFailOnMissingLocations()
        Description copied from interface: Configuration
        Whether to fail if a location specified in the migratedb.locations option doesn't exist
        Specified by:
        getFailOnMissingLocations in interface Configuration
        Returns:
        true to fail (default: false)
      • errorOverrides

        public FluentConfiguration errorOverrides​(String... errorOverrides)
        Rules for the built-in error handler that let you override specific SQL states and errors codes in order to force specific errors or warnings to be treated as debug messages, info messages, warnings or errors.

        Each error override has the following format: STATE:12345:W. It is a 5 character SQL state (or * to match all SQL states), a colon, the SQL error code (or * to match all SQL error codes), a colon and finally the desired behavior that should override the initial one.

        The following behaviors are accepted:

        • D to force a debug message
        • D- to force a debug message, but do not show the original sql state and error code
        • I to force an info message
        • I- to force an info message, but do not show the original sql state and error code
        • W to force a warning
        • W- to force a warning, but do not show the original sql state and error code
        • E to force an error
        • E- to force an error, but do not show the original sql state and error code

        Example 1: to force Oracle stored procedure compilation issues to produce errors instead of warnings, the following errorOverride can be used: 99999:17110:E

        Example 2: to force SQL Server PRINT messages to be displayed as info messages (without SQL state and error code details) instead of warnings, the following errorOverride can be used: S0001:0:I-

        Example 3: to force all errors with SQL error code 123 to be treated as warnings instead, the following errorOverride can be used: *:123:W

        Parameters:
        errorOverrides - The ErrorOverrides or an empty array if none are defined. (default: none)
      • group

        public FluentConfiguration group​(boolean group)
        Whether to group all pending migrations together in the same transaction when applying them (only recommended for databases with support for DDL transactions).
        Parameters:
        group - true if migrations should be grouped. false if they should be applied individually instead. (default: false)
      • installedBy

        public FluentConfiguration installedBy​(String installedBy)
        The username that will be recorded in the schema history table as having applied the migration.
        Parameters:
        installedBy - The username or null for the current database user of the connection. (default: null).
      • mixed

        public FluentConfiguration mixed​(boolean mixed)
        Whether to allow mixing transactional and non-transactional statements within the same migration. Enabling this automatically causes the entire affected migration to be run without a transaction.

        Note that this is only applicable for PostgreSQL, Aurora PostgreSQL, SQL Server and SQLite which all have statements that do not run at all within a transaction. This is not to be confused with implicit transaction, as they occur in MySQL or Oracle, where even though a DDL statement was run within a transaction, the database will issue an implicit commit before and after its execution.

        Parameters:
        mixed - true if mixed migrations should be allowed. false if an error should be thrown instead. (default: false)
      • ignoreMissingMigrations

        public FluentConfiguration ignoreMissingMigrations​(boolean ignoreMissingMigrations)
        Ignore missing migrations when reading the schema history table. These are migrations that were performed by an older deployment of the application that are no longer available in this version. For example: we have migrations available on the classpath with versions 1.0 and 3.0. The schema history table indicates that a migration with version 2.0 (unknown to us) has also been applied. Instead of bombing out (fail fast) with an exception, a warning is logged and MigrateDB continues normally. This is useful for situations where one must be able to deploy a newer version of the application even though it doesn't contain migrations included with an older one anymore. Note that if the most recently applied migration is removed, MigrateDb has no way to know it is missing and will mark it as future instead.
        Parameters:
        ignoreMissingMigrations - true to continue normally and log a warning, false to fail fast with an exception. (default: false)
      • ignoreIgnoredMigrations

        public FluentConfiguration ignoreIgnoredMigrations​(boolean ignoreIgnoredMigrations)
        Ignore ignored migrations when reading the schema history table. These are migrations that were added in between already migrated migrations in this version. For example: we have migrations available on the classpath with versions from 1.0 to 3.0. The schema history table indicates that version 1 was finished on 1.0.15, and the next one was 2.0.0. But with the next release a new migration was added to version 1: 1.0.16. Such scenario is ignored by migrate command, but by default is rejected by validate. When ignoreIgnoredMigrations is enabled, such case will not be reported by validate command. This is useful for situations where one must be able to deliver complete set of migrations in a delivery package for multiple versions of the product, and allows for further development of older versions.
        Parameters:
        ignoreIgnoredMigrations - true to continue normally, false to fail fast with an exception. (default: false)
      • ignorePendingMigrations

        public FluentConfiguration ignorePendingMigrations​(boolean ignorePendingMigrations)
        Ignore pending migrations when reading the schema history table. These are migrations that are available but have not yet been applied. This can be useful for verifying that in-development migration changes don't contain any validation-breaking changes of migrations that have already been applied to a production environment, e.g. as part of a CI/CD process, without failing because of the existence of new migration versions.
        Parameters:
        ignorePendingMigrations - true to continue normally, false to fail fast with an exception. (default: false)
      • ignoreFutureMigrations

        public FluentConfiguration ignoreFutureMigrations​(boolean ignoreFutureMigrations)
        Whether to ignore future migrations when reading the schema history table. These are migrations that were performed by a newer deployment of the application that are not yet available in this version. For example: we have migrations available on the classpath up to version 3.0. The schema history table indicates that a migration to version 4.0 (unknown to us) has already been applied. Instead of bombing out (fail fast) with an exception, a warning is logged and MigrateDB continues normally. This is useful for situations where one must be able to redeploy an older version of the application after the database has been migrated by a newer one.
        Parameters:
        ignoreFutureMigrations - true to continue normally and log a warning, false to fail fast with an exception. (default: true)
      • ignoreMigrationPatterns

        public FluentConfiguration ignoreMigrationPatterns​(String... ignoreMigrationPatterns)
        Ignore migrations that match this comma-separated list of patterns when validating migrations. Each pattern is of the form <migration_type>:<migration_state>. See the website for full details.

        Example: repeatable:missing,versioned:pending,*:failed

      • ignoreMigrationPatterns

        public FluentConfiguration ignoreMigrationPatterns​(ValidatePattern... ignoreMigrationPatterns)
        Ignore migrations that match this array of ValidatePatterns when validating migrations.
      • validateMigrationNaming

        public FluentConfiguration validateMigrationNaming​(boolean validateMigrationNaming)
        Whether to validate migrations and callbacks whose scripts do not obey the correct naming convention. A failure can be useful to check that errors such as case sensitivity in migration prefixes have been corrected.
        Parameters:
        validateMigrationNaming - false to continue normally, true to fail fast with an exception. (default: false)
      • validateOnMigrate

        public FluentConfiguration validateOnMigrate​(boolean validateOnMigrate)
        Whether to automatically call validate or not when running migrate.
        Parameters:
        validateOnMigrate - true if validate should be called. false if not. (default: true)
      • cleanOnValidationError

        public FluentConfiguration cleanOnValidationError​(boolean cleanOnValidationError)
        Whether to automatically call clean or not when a validation error occurs. This is exclusively intended as a convenience for development. even though we strongly recommend not to change migration scripts once they have been checked into SCM and run, this provides a way of dealing with this case in a smooth manner. The database will be wiped clean automatically, ensuring that the next migration will bring you back to the state checked into SCM. Warning! Do not enable in production!
        Parameters:
        cleanOnValidationError - true if clean should be called. false if not. (default: false)
      • cleanDisabled

        public FluentConfiguration cleanDisabled​(boolean cleanDisabled)
        Whether to disable clean. This is especially useful for production environments where running clean can be quite a career limiting move.
        Parameters:
        cleanDisabled - true to disable clean. false to leave it enabled. (default: false)
      • locations

        public FluentConfiguration locations​(String... locations)
        Sets the locations to scan recursively for migrations. The location type is determined by its prefix. Unprefixed locations or locations starting with classpath: point to a package on the classpath and may contain both SQL and Java-based migrations. Locations starting with filesystem: point to a directory on the filesystem, may only contain SQL migrations and are only scanned recursively down non-hidden directories.
        Parameters:
        locations - Locations to scan recursively for migrations. (default: db/migration)
      • locations

        public FluentConfiguration locations​(Location... locations)
        Sets the locations to scan recursively for migrations. The location type is determined by its prefix. Unprefixed locations or locations starting with classpath: point to a package on the classpath and may contain both SQL and Java-based migrations. Locations starting with filesystem: point to a directory on the filesystem, may only contain SQL migrations and are only scanned recursively down non-hidden directories.
        Parameters:
        locations - Locations to scan recursively for migrations. (default: db/migration)
      • encoding

        public FluentConfiguration encoding​(String encoding)
        Sets the encoding of SQL migrations.
        Parameters:
        encoding - The encoding of SQL migrations. (default: UTF-8)
      • encoding

        public FluentConfiguration encoding​(Charset encoding)
        Sets the encoding of SQL migrations.
        Parameters:
        encoding - The encoding of SQL migrations. (default: UTF-8)
      • defaultSchema

        public FluentConfiguration defaultSchema​(String schema)
        Sets the default schema managed by MigrateDB. This schema name is case-sensitive. If not specified, but schemas is, MigrateDB uses the first schema in that list. If that is also not specified, MigrateDB uses the default schema for the database connection.

        Consequences:

        • This schema will be the one containing the schema history table.
        • This schema will be the default for the database connection (provided the database supports this concept) .
        Parameters:
        schema - The default schema managed by MigrateDb.
      • schemas

        public FluentConfiguration schemas​(String... schemas)
        Sets the schemas managed by MigrateDB. These schema names are case-sensitive. If not specified, MigrateDB uses the default schema for the database connection. If defaultSchemaName is not specified, then the first of this list also acts as default schema.

        Consequences:

        • MigrateDB will automatically attempt to create all these schemas, unless they already exist.
        • The schemas will be cleaned in the order of this list.
        • If MigrateDB created them, the schemas themselves will be dropped when cleaning.
        Parameters:
        schemas - The schemas managed by MigrateDb. May not be null. Must contain at least one element.
      • table

        public FluentConfiguration table​(String table)
        Sets the name of the schema history table that will be used by MigrateDB. By default (single-schema mode) the schema history table is placed in the default schema for the connection provided by the datasource. When the migratedb.schemas property is set (multi-schema mode), the schema history table is placed in the first schema of the list.
        Parameters:
        table - The name of the schema history table that will be used by MigrateDB. (default: migratedb_state)
      • oldTable

        public FluentConfiguration oldTable​(@Nullable String oldTable)
        Sets the name of the old table to convert into the format used by MigrateDB. Only used for the "liberate" command.
        Parameters:
        oldTable - Name of old table to convert.
      • tablespace

        public FluentConfiguration tablespace​(String tablespace)
        Sets the tablespace where to create the schema history table that will be used by MigrateDB. If not specified, MigrateDB uses the default tablespace for the database connection. This setting is only relevant for databases that do support the notion of tablespaces. Its value is simply ignored for all others.
        Parameters:
        tablespace - The tablespace where to create the schema history table that will be used by MigrateDb.
      • target

        public FluentConfiguration target​(TargetVersion target)
        Sets the target version up to which MigrateDB should consider migrations. Migrations with a higher version number will be ignored. Special values:
        • current: Designates the current version of the schema
        • latest: The latest version of the schema, as defined by the migration with the highest version
        • next: The next version of the schema, as defined by the first pending migration
        Defaults to latest.
      • target

        public FluentConfiguration target​(Version target)
        Sets the target version up to which MigrateDB should consider migrations.
      • target

        public FluentConfiguration target​(String target)
        Sets the target version up to which MigrateDB should consider migrations. Migrations with a higher version number will be ignored. Special values:
        • current: Designates the current version of the schema
        • latest: The latest version of the schema, as defined by the migration with the highest version
        • next: The next version of the schema, as defined by the first pending migration
        • <version>? (end with a '?'): Instructs MigrateDB not to fail if the target version doesn't exist. In this case, MigrateDb will go up to but not beyond the specified target (default: fail if the target version doesn't exist)
        Defaults to latest.
      • cherryPick

        public FluentConfiguration cherryPick​(MigrationPattern... cherryPick)
        Gets the migrations that MigrateDB should consider when migrating. Leave empty to consider all available migrations. Migrations not in this list will be ignored.
      • cherryPick

        public FluentConfiguration cherryPick​(String... cherryPickAsString)
        Gets the migrations that MigrateDB should consider when migrating. Leave empty to consider all available migrations. Migrations not in this list will be ignored. Values should be the version for versioned migrations (e.g. 1, 2.4, 6.5.3) or the description for repeatable migrations (e.g. Insert_Data, Create_Table)
      • placeholderReplacement

        public FluentConfiguration placeholderReplacement​(boolean placeholderReplacement)
        Sets whether placeholders should be replaced.
        Parameters:
        placeholderReplacement - Whether placeholders should be replaced. (default: true)
      • placeholders

        public FluentConfiguration placeholders​(Map<String,​String> placeholders)
        Sets the placeholders to replace in sql migration scripts.
        Parameters:
        placeholders - The map of <placeholder, replacementValue> to apply to sql migration scripts.
      • placeholderPrefix

        public FluentConfiguration placeholderPrefix​(String placeholderPrefix)
        Sets the prefix of every placeholder.
        Parameters:
        placeholderPrefix - The prefix of every placeholder. (default: ${ )
      • placeholderSuffix

        public FluentConfiguration placeholderSuffix​(String placeholderSuffix)
        Sets the suffix of every placeholder.
        Parameters:
        placeholderSuffix - The suffix of every placeholder. (default: } )
      • scriptPlaceholderPrefix

        public FluentConfiguration scriptPlaceholderPrefix​(String scriptPlaceholderPrefix)
        Sets the prefix of every script placeholder.
        Parameters:
        scriptPlaceholderPrefix - The prefix of every placeholder. (default: FP__ )
      • scriptPlaceholderSuffix

        public FluentConfiguration scriptPlaceholderSuffix​(String scriptPlaceholderSuffix)
        Sets the suffix of every script placeholder.
        Parameters:
        scriptPlaceholderSuffix - The suffix of every script placeholder. (default: __ )
      • sqlMigrationPrefix

        public FluentConfiguration sqlMigrationPrefix​(String sqlMigrationPrefix)
        Sets the file name prefix for sql migrations. SQL migrations have the following file name structure: prefixVERSIONseparatorDESCRIPTIONsuffix, which using the defaults translates to V1_1__My_description.sql
        Parameters:
        sqlMigrationPrefix - The file name prefix for sql migrations (default: V)
      • baselineMigrationPrefix

        public FluentConfiguration baselineMigrationPrefix​(String baselineMigrationPrefix)
        Sets the file name prefix for baseline migrations. They have the following file name structure: prefixVERSIONseparatorDESCRIPTIONsuffix, which using the defaults translates to B1.1__My_description.sql
        Parameters:
        baselineMigrationPrefix - The file name prefix for baseline migrations (default: B)
      • repeatableSqlMigrationPrefix

        public FluentConfiguration repeatableSqlMigrationPrefix​(String repeatableSqlMigrationPrefix)
        Sets the file name prefix for repeatable sql migrations. Repeatable SQL migrations have the following file name structure: prefixSeparatorDESCRIPTIONsuffix, which using the defaults translates to R__My_description.sql
        Parameters:
        repeatableSqlMigrationPrefix - The file name prefix for repeatable sql migrations (default: R)
      • sqlMigrationSeparator

        public FluentConfiguration sqlMigrationSeparator​(String sqlMigrationSeparator)
        Sets the file name separator for sql migrations. SQL migrations have the following file name structure: prefixVERSIONseparatorDESCRIPTIONsuffix, which using the defaults translates to V1_1__My_description.sql
        Parameters:
        sqlMigrationSeparator - The file name separator for sql migrations (default: __)
      • sqlMigrationSuffixes

        public FluentConfiguration sqlMigrationSuffixes​(String... sqlMigrationSuffixes)
        The file name suffixes for SQL migrations. (default: .sql) SQL migrations have the following file name structure: prefixVERSIONseparatorDESCRIPTIONsuffix, which using the defaults translates to V1_1__My_description.sql Multiple suffixes (like .sql,.pkg,.pkb) can be specified for easier compatibility with other tools such as editors with specific file associations.
        Parameters:
        sqlMigrationSuffixes - The file name suffixes for SQL migrations.
      • javaMigrations

        public FluentConfiguration javaMigrations​(JavaMigration... javaMigrations)
        The additional Java-based migrations. These are not Java-based migrations discovered through classpath scanning and instantiated by MigrateDB. Instead these are application-controlled instances of JavaMigration. This is particularly useful when working with a dependency injection container, where you may want the DI container to instantiate the class and wire up its dependencies for you.
        Parameters:
        javaMigrations - The additional Java-based migrations. An empty array if none. (default: none)
      • javaMigrations

        public FluentConfiguration javaMigrations​(Collection<JavaMigration> javaMigrations)
        The additional Java-based migrations. These are not Java-based migrations discovered through classpath scanning and instantiated by MigrateDB. Instead these are application-controlled instances of JavaMigration. This is particularly useful when working with a dependency injection container, where you may want the DI container to instantiate the class and wire up its dependencies for you.
        Parameters:
        javaMigrations - The additional Java-based migrations. An empty array if none. (default: none)
      • dataSource

        public FluentConfiguration dataSource​(DataSource dataSource)
        Sets the datasource to use. Must have the necessary privileges to execute DDL.
        Parameters:
        dataSource - The datasource to use. Must have the necessary privileges to execute DDL.
      • dataSource

        public FluentConfiguration dataSource​(String url,
                                              String user,
                                              String password)
        Sets the datasource to use. Must have the necessary privileges to execute DDL.
        Parameters:
        url - The JDBC URL of the database.
        user - The user of the database.
        password - The password of the database.
      • connectRetries

        public FluentConfiguration connectRetries​(int connectRetries)
        The maximum number of retries when attempting to connect to the database. After each failed attempt, MigrateDB will wait 1 second before attempting to connect again, up to the maximum number of times specified by connectRetries. The interval between retries doubles with each subsequent attempt.
        Parameters:
        connectRetries - The maximum number of retries (default: 0).
      • connectRetriesInterval

        public FluentConfiguration connectRetriesInterval​(int connectRetriesInterval)
        The maximum time between retries when attempting to connect to the database in seconds. This will cap the interval between connect retry to the value provided.
        Parameters:
        connectRetriesInterval - The maximum time between retries in seconds (default: 120).
      • initSql

        public FluentConfiguration initSql​(String initSql)
        The SQL statements to run to initialize a new database connection immediately after opening it.
        Parameters:
        initSql - The SQL statements. (default: null)
      • baselineVersion

        public FluentConfiguration baselineVersion​(Version baselineVersion)
        Sets the version to tag an existing schema with when executing baseline.
        Parameters:
        baselineVersion - The version to tag an existing schema with when executing baseline. (default: 1)
      • baselineVersion

        public FluentConfiguration baselineVersion​(String baselineVersion)
        Sets the version to tag an existing schema with when executing baseline.
        Parameters:
        baselineVersion - The version to tag an existing schema with when executing baseline. (default: 1)
      • baselineDescription

        public FluentConfiguration baselineDescription​(String baselineDescription)
        Sets the description to tag an existing schema with when executing baseline.
        Parameters:
        baselineDescription - The description to tag an existing schema with when executing baseline. (default: << MigrateDb Baseline >>)
      • baselineOnMigrate

        public FluentConfiguration baselineOnMigrate​(boolean baselineOnMigrate)
        Whether to automatically call baseline when migrate is executed against a non-empty schema with no schema history table. This schema will then be baselined with the baselineVersion before executing the migrations. Only migrations above baselineVersion will then be applied.

        This is useful for initial MigrateDB production deployments on projects with an existing DB.

        Be careful when enabling this as it removes the safety net that ensures MigrateDB does not migrate the wrong database in case of a configuration mistake!

        Parameters:
        baselineOnMigrate - true if baseline should be called on migrate for non-empty schemas, false if not. (default: false)
      • outOfOrder

        public FluentConfiguration outOfOrder​(boolean outOfOrder)
        Allows migrations to be run "out of order". If you already have versions 1 and 3 applied, and now a version 2 is found, it will be applied too instead of being ignored.
        Parameters:
        outOfOrder - true if outOfOrder migrations should be applied, false if not. (default: false)
      • skipExecutingMigrations

        public FluentConfiguration skipExecutingMigrations​(boolean skipExecutingMigrations)
        Whether MigrateDB should skip actually executing the contents of the migrations and only update the schema history table. This should be used when you have applied a migration manually (via executing the sql yourself, or via an ide), and just want the schema history table to reflect this.

        Use in conjunction with cherryPick to skip specific migrations instead of all pending ones.

      • getCallbacks

        public Callback[] getCallbacks()
        Gets the callbacks for lifecycle notifications.
        Specified by:
        getCallbacks in interface Configuration
        Returns:
        The callbacks for lifecycle notifications. An empty array if none. (default: none)
      • isSkipDefaultCallbacks

        public boolean isSkipDefaultCallbacks()
        Description copied from interface: Configuration
        Whether MigrateDB should skip the default callbacks. If true, only custom callbacks are used.
        Specified by:
        isSkipDefaultCallbacks in interface Configuration
        Returns:
        Whether default built-in callbacks should be skipped. (default: false)
      • callbacks

        public FluentConfiguration callbacks​(Callback... callbacks)
        Set the callbacks for lifecycle notifications.
        Parameters:
        callbacks - The callbacks for lifecycle notifications. (default: none)
      • callbacks

        public FluentConfiguration callbacks​(String... callbacks)
        Set the callbacks for lifecycle notifications.
        Parameters:
        callbacks - The fully qualified class names, or full qualified package to scan, of the callbacks for lifecycle notifications. (default: none)
      • skipDefaultCallbacks

        public FluentConfiguration skipDefaultCallbacks​(boolean skipDefaultCallbacks)
        Whether MigrateDB should skip the default callbacks. If true, only custom callbacks are used.
        Parameters:
        skipDefaultCallbacks - Whether default built-in callbacks should be skipped. (default: false)
      • resolvers

        public FluentConfiguration resolvers​(MigrationResolver... resolvers)
        Sets custom MigrationResolvers to be used in addition to the built-in ones for resolving Migrations to apply.
        Parameters:
        resolvers - The custom MigrationResolvers to be used in addition to the built-in ones for resolving Migrations to apply. (default: empty list)
      • resolvers

        public FluentConfiguration resolvers​(String... resolvers)
        Sets custom MigrationResolvers to be used in addition to the built-in ones for resolving Migrations to apply.
        Parameters:
        resolvers - The fully qualified class names of the custom MigrationResolvers to be used in addition to the built-in ones for resolving Migrations to apply. (default: empty list)
      • skipDefaultResolvers

        public FluentConfiguration skipDefaultResolvers​(boolean skipDefaultResolvers)
        Whether MigrateDB should skip the default resolvers. If true, only custom resolvers are used.
        Parameters:
        skipDefaultResolvers - Whether default built-in resolvers should be skipped. (default: false)
      • jdbcProperties

        public FluentConfiguration jdbcProperties​(Map<String,​String> jdbcProperties)
        Properties to pass to the JDBC driver object
        Parameters:
        jdbcProperties - The properties to pass to the JDBC driver object
      • resourceProvider

        public FluentConfiguration resourceProvider​(ResourceProvider resourceProvider)
        Custom ResourceProvider to be used to look up resources. If not set, the default strategy will be used.
        Parameters:
        resourceProvider - Custom ResourceProvider to be used to look up resources
      • javaMigrationClassProvider

        public FluentConfiguration javaMigrationClassProvider​(ClassProvider<JavaMigration> javaMigrationClassProvider)
        Custom ClassProvider to be used to look up JavaMigration classes. If not set, the default strategy will be used.
        Parameters:
        javaMigrationClassProvider - Custom ClassProvider to be used to look up JavaMigration classes.
      • outputQueryResults

        public FluentConfiguration outputQueryResults​(boolean outputQueryResults)
        Whether MigrateDB should output a table with the results of queries when executing migrations.
        Parameters:
        outputQueryResults - true to output a table with the results of queries when executing migrations. (default: true)
      • configuration

        public FluentConfiguration configuration​(Properties properties)
        Configures MigrateDB with these properties. This overwrites any existing configuration. Property names are documented in PropertyNames. To use a custom ClassLoader, setClassLoader() must be called prior to calling this method. To support the configuration of extensions, those extensions must be activated via useExtension prior to calling this method.
        Parameters:
        properties - Properties used for configuration.
        Throws:
        MigrateDbException - when the configuration failed.
      • configuration

        public FluentConfiguration configuration​(Map<String,​String> props)
        Configures MigrateDB with these properties. This overwrites any existing configuration. Property names are documented in PropertyNames. To use a custom ClassLoader, it must be passed to the MigrateDb constructor prior to calling this method. To support the configuration of extensions, those extensions must be activated via useExtension prior to calling this method.
        Parameters:
        props - Properties used for configuration.
        Throws:
        MigrateDbException - when the configuration failed.
      • createSchemas

        public FluentConfiguration createSchemas​(boolean createSchemas)
        Whether MigrateDB should attempt to create the schemas specified in the schemas property
        Parameters:
        createSchemas - true to attempt to create the schemas (default: true)
      • failOnMissingLocations

        public FluentConfiguration failOnMissingLocations​(boolean failOnMissingLocations)
        Whether to fail if a location specified in the migratedb.locations option doesn't exist
        Returns:
        true to fail (default: false)
      • useExtensions

        public FluentConfiguration useExtensions​(Iterable<MigrateDbExtension> extensions)
        Enables multiple MigrateDB extensions. This is mainly used to load extensions from the ServiceLoader facility:
        
              config.useExtensions(ServiceLoader.load(MigrateDbExtension.class, someClassLoader))