Setting up IBM Informix

The following sections describe how to replace the default H2 databases with IBM Informix:

Creating The Database

Follow the steps below to set up a IBM Informix database:

Preparing the Informix database

Download the latest version of IBM Informix and install it on your computer.

Setting up the database and users

Create the database and users in Informix.

For instructions on creating the database and users, see Informix product documentation .

Setting up Informix JDBC drivers

Download the Informix JDBC drivers and copy them to your WSO2 product's <PRODUCT_HOME>/repository/components/lib/directory.

Creating database tables

Create database tables manually by running a script or automatically by using a startup parameter as follows:

Using the script

You can create database tables manually by executing the following scripts:

To create tables for the registry and user manager database, use the following script:
```
<PRODUCT_HOME>/dbscripts/informix.sql
```
To create tables for the identity databases , use the following script:
```
<PRODUCT_HOME>/dbscripts/identity/informix.sql
```

Using a startup parameter

You can create database tables automatically when starting the WSO2 product for the first time using the startup parameters as follows:

For Windows:

<PRODUCT_HOME>/bin/wso2server.bat -Dsetup

For Linux:

<PRODUCT_HOME>/bin/wso2server.sh -Dsetup

Creating A Datasource For The Database

After creating the database, you create a datasource to point to it in the following files:

Edit the default datasource configuration defined in the master-datasources.xml file, which is located in the <PRODUCT_HOME>/repository/conf/datasources/ directory, as shown below. The database configurations in registry.xml and user-mgt.xml refer to this data source.

The port and driverClassName elements should remain the same as the following configuration. Replace other settings with your custom values.
```
<datasource>
            <name>WSO2AM_DB</name>
            <description>The datasource used for API Manager database</description>
            <jndiConfig>
                <name>jdbc/WSO2AM_DB</name>
            </jndiConfig>
            <definition type="RDBMS">
                <configuration>
                    
                    <url>jdbc:informix-sqli://localhost:1533/AM_DB</url>
                    <username>wso2carbon</username>
                    <password>wso2carbon</password>
                    <driverClassName>com.informix.jdbc.IfxDriver</driverClassName>
                    <maxActive>50</maxActive>
                    <maxWait>60000</maxWait>
                    <testOnBorrow>true</testOnBorrow>
                    <validationQuery>SELECT 1</validationQuery>
                    <validationInterval>30000</validationInterval>
                </configuration>
            </definition>
        </datasource>
```
Following are 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 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 the pool will wait (when there are no available connections) for a connection to be returned before throwing an exception. You can enter either 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, or 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.
  
  For more information on other parameters that can be defined in the master-datasources.xml file, see Tomcat JDBC Connection Pool.
If you changed the databases used for identity , copy the WSO2_CARBON_DB datasource configuration for it in < PRODUCT_HOME>/repository/conf/datasources/master-datasources.xml file and replace its default values with your custom values.
Replace the default values in the datasource configurations of the following files with your custom values accordingly, to point to the created registry and user manager and identity databases.
- <PRODUCT_HOME>/repository/conf/identity.xml
- <PRODUCT_HOME>/repository/conf/user-mgt.xml
- <PRODUCT_HOME>/repository/conf/registry.xml