47 lines
2.2 KiB
Text
Executable file
47 lines
2.2 KiB
Text
Executable file
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=== Modify the {{book.project.name}} Datasource
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After declaring your JDBC driver, you have to modify the existing datasource configuration that {{book.project.name}} uses
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to connect it to your new external database. You'll do
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this within the same configuration file and XML block that you registered your JDBC driver in. Here's an example
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that sets up the connection to your new database:
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.Declare Your JDBC Drivers
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[source,xml]
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----
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<subsystem xmlns="urn:jboss:domain:datasources:4.0">
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<datasources>
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...
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<datasource jndi-name="java:jboss/datasources/KeycloakDS" pool-name="KeycloakDS" enabled="true" use-java-context="true">
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<connection-url>jdbc:postgresql://localhost/keycloak</connection-url>
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<driver>postgresql</driver>
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<pool>
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<max-pool-size>20</max-pool-size>
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</pool>
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<security>
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<user-name>William</user-name>
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<password>password</password>
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</security>
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</datasource>
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...
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</datasources>
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</subsystem>
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----
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Search for the `datasource` definition for `KeycloakDS`. You'll first need to modify the `connection-url`. The
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documentation for your vendor's JDBC implementation should specify the format for this connection URL value.
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Next define the `driver` you will use. This is the logical name of the JDBC driver you declared in the previous section of this
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chapter.
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It is expensive to open a new connection to a database every time you want to perform a transaction. To compensate, the datasource
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implementation maintains a pool of open connections. The `max-pool-size` specifies the maximum number of connections it will pool.
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You may want to change the value of this depending on the load of your system.
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Finally, with PostgreSQL at least, you need to define the database username and password that is needed to connect to the database. You
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may be worried that this is in clear text in the example. There are methods to obfuscate this, but this is beyond the
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scope of this guide.
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NOTE: For more information and details features of datasources, please see the link:{{book.appserver.datasource.link}}[the datasource configuration chapter]
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of the {{book.appserver.admindoc.name}}.
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