snaq.db

Class SQLUpdate

java.lang.Object

snaq.db.SQLUpdate

All Implemented Interfaces:

AutoCloseable

public class SQLUpdate
extends Object
implements AutoCloseable

Command-line utility to send SQL commands to a database. This class is useful for creating a large number of database tables and/or records from a user-defined text file containing SQL commands. It relies on the ConnectionPoolManager class to assist with the creation of a connection to the database, which in turn requires the appropriate dbpool.properties file in the classpath.

     Usage: java snaq.db.SQLUpdate <poolnames> <input file> [<separator>]
 

where pool is the name of the connection pool as defined in the dbpool.properties file, input file is the name of the text file containing the SQL statements to be issued to the defined database, and separator is an optional parameter to specify a delimiter for the SQL statements in the file. If the separator is not specified then each line of the file is assumed to be a separate statement.

Note: comments are allowed in the input file by starting the line with either "#" or "--".

Author:

Giles Winstanley

See Also:

ConnectionPoolManager

Field Summary

Fields

Modifier and Type	Field and Description
protected static org.slf4j.Logger	logger SLF4J shared instance for writing log entries.

Constructor Summary

Constructors

Constructor and Description
SQLUpdate(Connection con)
SQLUpdate(String poolname)

Method Summary

Modifier and Type	Method and Description
void	close() Closes the current database connection.
void	doStatement(String sql) Issues a statement to the database.
static String	loadTextFile(File f) Loads a text file into a string.
static void	main(String[] args)
static String[]	splitSQL(String text, String separator) Splits the specified text input into separate SQL statements.

Methods inherited from class java.lang.Object

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

Field Detail

logger

protected static final org.slf4j.Logger logger

SLF4J shared instance for writing log entries.

Constructor Detail

SQLUpdate

public SQLUpdate(String poolname)
          throws IOException,
                 SQLException

Throws:

IOException

SQLException

SQLUpdate

public SQLUpdate(Connection con)
          throws SQLException

Throws:

SQLException

Method Detail

close

public void close()

Closes the current database connection.

Specified by:

close in interface AutoCloseable

doStatement

public void doStatement(String sql)
                 throws SQLException

Issues a statement to the database.

Parameters:

sql - SQL command to issue

Throws:

SQLException - if thrown during SQL execution

loadTextFile

public static final String loadTextFile(File f)
                                 throws IOException

Loads a text file into a string.

Parameters:

f - File containing text to load

Returns:

String containing the text loaded from the specified file

Throws:

IOException - if thrown during file load

splitSQL

public static String[] splitSQL(String text,
                                String separator)

Splits the specified text input into separate SQL statements.

Parameters:

text - string containing the text to be processed

separator - string specifying the separator between SQL statements

Returns:

String array containing the SQL statements parsed

main

public static void main(String[] args)
                 throws Exception

Throws:

Exception