Package org.apache.druid.metadata.segment

Class SqlSegmentMetadataReadOnlyTransactionFactory

java.lang.Object

org.apache.druid.metadata.segment.SqlSegmentMetadataReadOnlyTransactionFactory

All Implemented Interfaces:

SegmentMetadataTransactionFactory

Direct Known Subclasses:

SqlSegmentMetadataTransactionFactory

public class SqlSegmentMetadataReadOnlyTransactionFactory
extends Object
implements SegmentMetadataTransactionFactory

Factory for read-only SegmentMetadataTransactions that always read directly from the metadata store and never from the SegmentMetadataCache.

See Also:

• SqlSegmentMetadataTransactionFactory

Constructor Summary

Constructors

Constructor	Description
SqlSegmentMetadataReadOnlyTransactionFactory(com.fasterxml.jackson.databind.ObjectMapper jsonMapper, MetadataStorageTablesConfig tablesConfig, SQLMetadataConnector connector)

Method Summary

Modifier and Type	Method	Description
protected SegmentMetadataTransaction	createSqlTransaction(String dataSource, org.skife.jdbi.v2.Handle handle, org.skife.jdbi.v2.TransactionStatus transactionStatus)
protected <T> T	executeReadAndClose(SegmentMetadataReadTransaction transaction, SegmentMetadataReadTransaction.Callback<T> callback)
int	getMaxRetries()
int	getQuietRetries()
<T> T	inReadOnlyDatasourceTransaction(String dataSource, SegmentMetadataReadTransaction.Callback<T> callback)	Creates and executes a new read-only transaction for the given datasource.
<T> T	inReadWriteDatasourceTransaction(String dataSource, SegmentMetadataTransaction.Callback<T> callback)	Creates and executes a new read-write transaction for the given datasource.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

SqlSegmentMetadataReadOnlyTransactionFactory

@Inject
public SqlSegmentMetadataReadOnlyTransactionFactory(com.fasterxml.jackson.databind.ObjectMapper jsonMapper,
 MetadataStorageTablesConfig tablesConfig,
 SQLMetadataConnector connector)

Method Details

getMaxRetries

public int getMaxRetries()

getQuietRetries

public int getQuietRetries()

inReadOnlyDatasourceTransaction

public <T> T inReadOnlyDatasourceTransaction(String dataSource,
 SegmentMetadataReadTransaction.Callback<T> callback)

Description copied from interface: SegmentMetadataTransactionFactory

Creates and executes a new read-only transaction for the given datasource. The implementation may retry the transaction until it succeeds.

Specified by:

inReadOnlyDatasourceTransaction in interface SegmentMetadataTransactionFactory

inReadWriteDatasourceTransaction

public <T> T inReadWriteDatasourceTransaction(String dataSource,
 SegmentMetadataTransaction.Callback<T> callback)

Description copied from interface: SegmentMetadataTransactionFactory

Creates and executes a new read-write transaction for the given datasource. The implementation may retry the transaction until it succeeds.

Specified by:

inReadWriteDatasourceTransaction in interface SegmentMetadataTransactionFactory

createSqlTransaction

protected SegmentMetadataTransaction createSqlTransaction(String dataSource,
 org.skife.jdbi.v2.Handle handle,
 org.skife.jdbi.v2.TransactionStatus transactionStatus)

executeReadAndClose

protected <T> T executeReadAndClose(SegmentMetadataReadTransaction transaction,
 SegmentMetadataReadTransaction.Callback<T> callback)
                             throws Exception

Throws:

Exception