ij.dataSource property

Function

The ij.dataSource property specifies the datasource to be used to access the database. When specifying a datasource, Derby does not use the DriverManager mechanism to establish connections.

Syntax

To establish a connection using ij.dataSource, you need to set the ij.dataSource.databaseName property. If you want to create the database, specify the ij.dataSource.createDatabase property as well.

ij.dataSource=dataSourcename
ij.dataSource.databaseName=databasename
[ij.dataSource.createDatabase=create]

Example 1

In the following example, ij connects to a database named sample using an EmbeddedDataSource. The sample database is created if it does not already exist.

#
# If your application runs on JDK 1.6 or higher, then you should
# specify the JDBC4 variant of this DataSource:
# org.apache.derby.jdbc.EmbeddedDataSource40.
#
java -Dij.dataSource=org.apache.derby.jdbc.EmbeddedDataSource
-Dij.dataSource.databaseName=sample -Dij.dataSource.createDatabase=create
  org.apache.derby.tools.ij
ij version 10.3 
CONNECTION0*
* = current connection
ij>

Example 2

In the following example, ij starts using an EmbeddedSimpleDataSource, then creates a database named smalldb using the connect command, specifying ;create=true to create the database if it does not already exist.

#
# If your application runs with a jvm supporting JSR169, you cannot use
# org.apache.derby.jdbc.EmbeddedDataSource, but you can use 
# org.apache.derby.jdbc.EmbeddedSimpleDataSource instead.
# Because specifying a protocol would automatically attempt to load a driver,
# when using ij.dataSource you should omit the protocol on connect.
# This is especially relevant with JSR169 because java.sql.Driver is not supported.
#
java -Dij.dataSource=org.apache.derby.jdbc.EmbeddedSimpleDataSource
  org.apache.derby.tools.ij
ij version 10.3 
ij> connect 'smalldb;create=true'; 
ij>

For more information about DataSources, refer to the JDBC documentation and "Using Derby as a J2EE Resource Manager" in the Java DB Developer's Guide.