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Follow the instructions below to set up a remote H2 database.The following sections describe how to replace the default H2 databases with Remote H2:

Preparing the remote H2 DB

1. Download and install the H2 database on your computer. H2 installation guide can be found at: http://www.h2database.com/html/quickstart.html.

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2. Go to the $H2_HOME/bin directory and run the H2 network server starting script.

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3. Run the H2 database server with the following commands.

• For Linux:

$ ./h2.sh

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• For Windows:

$ h2.bat

The script will start the database engine and bring up a pop-up window with a "Start Browser" button. The "Start Browser" button will open a web browser containing a client application, which you can connect to a database. H2 will automatically create a database if a database does not exist by the name you provide in the "JDBC URL" text box.

Setup Configuration Files

1. Edit the default database configuration defined in the  master-datasources.xml  file located at  $CARBON_HOME/repository/conf/datasources directory instance as follows. Both the database configurations in  registry.xml  and  user-mgt.xml  refer this data source.

<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:h2:tcp://localhost/~/registryDB;create=true</url>
               <username>regadmin</username>
               <password>regadmin</password>
               <driverClassName>org.h2.Driver</driverClassName>
               <maxActive>80</maxActive>
               <maxWait>60000</maxWait>
               <minIdle>5</minIdle>
               <testOnBorrow>true</testOnBorrow>
               <validationQuery>SELECT 1</validationQuery>
               <validationInterval>30000</validationInterval>
           </configuration>
      </definition>
</datasource>

The database configuration options

• url - The URL of the database.
• username - The name of the database user.
• password - The password of the database user.
• driverClassName  - The class name of the database driver.
• maxActive - The maximum number of active connections that can be allocated from this pool at the same time or negative for no limit.
• maxWait - The maximum number of milliseconds that the pool will wait (when there are no available connections) for a connection to be returned before throwing an exception, or <= 0 to wait indefinitely.
• minIdle - The minimum number of active connections that can remain idle in the pool, without extra ones being created, or 0 to create none.

Setup Drivers

To use a new H2 database driver other than the version shipped with the product, do the following.

1. Delete the following H2 database related JARs. Some of them may already be excluded from the configuration.

• <PRODUCT_HOME>/repository/components/plugins/h2-database-engine_1.2.140.wso2v3.jar

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2. Copy the new H2 database driver (org.h2.Driver) to <PRODUCT_HOME>/repository/components/lib. You can find the required driver JAR in $H2_HOME/bin/h2-*.jar.

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Create Database

Automatic Database Creation

1. The first time you start the server, run it with the -Dsetup option. It will create the H2 database with all the underlying tables.

• For Linux:

sh wso2server.sh -Dsetup

• For Windows:

wso2server.bat -Dsetup

Manual Table Creation using scripts

1. Tables can be manually created by logging into the created database and running the following script in H2 shell or web console.

PRODUCT_HOME/dbscripts/h2.sql

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2. After setting up the DB tables, start the server with the following commands.

• For Linux:

sh wso2server.sh

• For Windows:

...

Changing the identity/storage databases

The topics above show how to change the WSO2_CARBON_DB, which is used to store registry and user manager information. If you set up a separate database for identity/storage related data, the instructions are the same. In summary:

1. Add the datasource to the master-datasources.xml file. 

2. Create the database tables using the following scripts: 

   For the identity database	Use <PRODUCT_HOME>/dbscripts/identity/h2.sql
   For the storage database	Use <PRODUCT_HOME>/dbscripts/storage/h2.sql