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The following sections describe how to replace the default H2 database with embedded Derby:

Table of Contents

maxLevel	3
minLevel	3

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Follow the steps below to change the type of the default WSO2_CARBON_DB datasource.

Edit the default datasource configuration datasourceconfiguration in the <PRODUCT_HOME>/repository/conf/datasources/m aster-datasources.xml file as shown below.

Code Block

language	html/xml

<datasource>
     <name>WSO2_CARBON_DB</name>
     <description>The datasource used for registry and user manager</description>
     <jndiConfig>
         <name>jdbc/WSO2CarbonDB</name>
     </jndiConfig>
     <definition type="RDBMS">
         <configuration>
               <url>jdbc:derby://localhost:1527/db;create=true</url>
               <username>regadmin</username>
               <password>regadmin</password>
               <driverClassName>org.apache.derby.jdbc.EmbeddedDriver</driverClassName>
               <maxActive>80</maxActive>
               <maxWait>60000</maxWait>
               <minIdle>5</minIdle>
               <testOnBorrow>true</testOnBorrow>
               <validationQuery>SELECT 1</validationQuery>
               <validationInterval>30000</validationInterval>
			   <defaultAutoCommit>false</defaultAutoCommit>
         </configuration>
     </definition>
</datasource>

The elements in the above configuration are described below:

Element	Description
url	The URL of the database. The default port for a DB2 instance is 50000.
username and password	The name and password of the database user.
driverClassName	The class name of the database driver.
maxActive	The maximum number of active connections that can be allocated at the same time from this pool. Enter any negative value to denote an unlimited number of active connections.
maxWait	The maximum number of milliseconds that should elapse (when there are no available connections in the pool) before the system throws an exception. You can enter zero or a negative value to wait indefinitely.
minIdle	The minimum number of active connections that can remain idle in the pool without extra ones being created. Enter zero to create none.
testOnBorrow	The indication of whether objects will be validated before being borrowed from the pool. If the object fails to validate, it will be dropped from the pool and another attempt will be made to borrow another.
validationQuery	The SQL query that will be used to validate connections from this pool before returning them to the caller.
validationInterval	The indication to avoid excess validation, and only run validation at the most, at this frequency (time in milliseconds). If a connection is due for validation but has been validated previously within this interval, it will not be validated again.
defaultAutoCommit	You can add set this property and set it to `false` as shown above if you want to disable auto committing for your datasource. Disabling this property will allow multiple SQL statements to be committed to the datasource database as one transaction, as opposed to committing each SQL statement as individual transactions. If this property is not used in the configuration, the database type will determine if this functionality is enabled or disabled. Typically, auto committing is enabled by default for an RDBMS. Note: The `<defaultAutoCommit>` property in this configuration is ignored in some WSO2 products, such as WSO2 Identity Server and WSO2 Data Analytics Server, because this functionality is configured at the code level as required for that product.

Info
For more information on other parameters that can be defined in the `<PRODUCT_HOME>/repository/conf/datasources/` `master-datasources.xml` file, see Tomcat JDBC Connection Pool.

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