Changing the Default Databases for BPMN and BPEL

When you use the Business Process profile in WSO2 EI, two separate databases are required for storing data specific to BPMN and BPEL. This is in addition to the default Carbon database. By default, the Business Process profile is shipped with embedded H2 databases for this purpose:

• activiti.h2.db: For BPMN-specific data.

• jpadb.h2.db: For BPEL-specific data.

These databases are stored in the <EI_HOME>/wso2/business-process/repository/database directory.

Given below are the steps you need to follow in order to change the default BPMN and BPEL databases.

Setting up the database

You can set up two databases of the following types:

• Setting up a MySQL database

• Setting up an MS SQL database

• Setting up an Oracle database

• Setting up an IBM DB2 database

• Setting up a Derby database

• Setting up a PostgreSQL database

Creating the datasource connection

A datasource is used to establish the connection to a database. By default, datasource connections for the BPEL and BPMN databases are configured in the activiti-datasources.xml and bps-datasources.xml files respectively. These datasource configurations point to the default  H2 databases, which are shipped with the product. After setting up new databases to replace the default H2 databases, you can either change the default configurations in the above-mentioned files or configure new datasources.

Creating the datasource connection for the BPEL database

Follow the steps below.

1. Open the <EI_HOME>/wso2/business-process/conf/datasources/bps-datasources.xml file and locate the <datasource> configuration element.

2. You simply have to update the url pointing to your database, the username and password required to access the database. See the following examples:

3. Optionally, you can update the configuration elements given below for your database connection.

Creating the datasource connection for the BPMN database

Follow the steps below.

1. Open the <EI_HOME>/wso2/business-process/conf/datasources/activiti-datasources.xml file and locate the <datasource> configuration element.

2. You simply have to update the url pointing to your database, the user name and password required to access the database. See the following examples:

3. Optionally, you can update the configuration elements given below for your database connection.

Creating database tables

To create the database tables, connect to the databases that you created earlier and run the scripts provided in the product pack.

Creating database tables in the BPEL database 

Several db scripts are provided to create the necessary tables in the BPEL database:

• Create: These scripts are stored in the <EI_HOME>/wso2/business-process/dbscripts/bps/bpel/create directory.

• Drop: These scripts are stored in the <EI_HOME>/wso2/business-process/dbscripts/bps/bpel/drop directory.

• Truncate: These scripts are stored in the <EI_HOME>/wso2/business-process/dbscripts/bps/bpel/truncate directory.

• Upgrade: These scripts are stored in the <EI_HOME>/wso2/business-process/dbscripts/bps/bpel/upgrade directory.

To create the necessary database tables:

1. Connect to the database and run the above scripts. For example, shown below is how to create data in a MySQL database.

   mysql -u root -p -DBPS_DS < '<EI_HOME>/wso2/business-process/dbscripts/bps/bpel/create/mysql.sql';

2. Restart the server.

Creating database tables in the BPMN database 

Several db scripts are provided to create the necessary tables in the BPMN database:

• Create: These scripts are stored in the <EI_HOME>/wso2/business-process/dbscripts/bps/bpmn/create directory.

• Drop: These scripts are stored in the <EI_HOME>/wso2/business-process/dbscripts/bps/bpmn/drop directory.

• Metadata: These scripts are stored in the <EI_HOME>/wso2/business-process/dbscripts/bps/bpmn/metadata directory.

• Upgrade: These scripts are stored in the <EI_HOME>/wso2/business-process/dbscripts/bps/bpmn/upgrade directory.

To create the necessary database tables:

1. Connect to the database and run the above scripts. For example, execute the following scripts to create data in a MySQL database.

   • activiti.mysql.create.engine.sql

   • activiti.mysql.create.history.sql

   • activiti.mysql.create.identity.sql

   • activiti.mysql.create.substitute.sql

   Shown below is how the script for creating identity data is executed:

   mysql -u root -p -DBPS_DS < '<EI_HOME>/wso2/business-process/dbscripts/bps/bpmn/create/activiti.mysql.create.identity.sql';

2. Restart the server.

Create database tables when the server starts

You can create database tables automatically when starting the product for the first time by using the -Dsetup parameter as follows:

• For Windows: <EI_HOME>/wso2/business-process/bin/wso2server.bat -Dsetup

• For Linux: <EI_HOME>/wso2/business-process/bin/wso2server.sh -Dsetup