ESB WSO2 - Connecting to a local MySQL database ["Registry entry defined with key: com.mysql.jdbc.Driver not found"] - mysql

Question

First of all I want to say that I'm a beginner with ESB WSO2.
I want to connect to a MySQL DataBase and I get this error:
"Error DB Mediator datasource: null.Registry entry defined with key: com.mysql.jdbc.Driver not found."
"DataSource: null was not initialized for given JNDI properties"
This is my code:
<?xml version="1.0" encoding="UTF-8"?>
<api context="/api/dbtask" name="api.dbtask" xmlns="http://ws.apache.org/ns/synapse">
<resource methods="GET">
<inSequence>
<dblookup>
<connection>
<pool>
<driver key="com.mysql.jdbc.Driver"/>
<url key="jdbc:mysql://localhost:3306/utilizatori"/>
<user key="root"/>
<password key="1234"/>
</pool>
</connection>
<statement>
<sql><![CDATA[SELECT * FROM people WHERE id=1;]]></sql>
<parameter expression="//m0:getQuote/m0:request/m0:symbol" type="VARCHAR" xmlns:m0="https://services.samples"/>
<result column="nume" name="nume"/>
</statement>
</dblookup>
<!--
<log level="custom">
<property name="ID" expression="get-property('id')" />
<property name="NAME" expression="get-property('nume')" />
<property name="AGE" expression="get-property('varsta')" />
</log>
-->
<respond/>
</inSequence>
<outSequence/>
<faultSequence/>
</resource>
</api>

Answer 1

There is an issue with the connection pool you have added. The above format is used to get the configuration values from the registry [1],[2]. If you want to define the connection pool inline you need to use the following format [3].
<dblookup xmlns="http://ws.apache.org/ns/synapse">
<connection>
<pool>
<driver>org.apache.derby.jdbc.ClientDriver</driver>
<url>jdbc:derby://localhost:1527/esbdb;create=false</url>
<user>esb</user>
<password>esb</password>
</pool>
</connection>
<statement>
<sql><![CDATA[select * from company where name =?]]></sql>
<parameter expression="//m0:getQuote/m0:request/m0:symbol" type="VARCHAR" xmlns:m0="http://services.samples/xsd"/>
<result column="id" name="company_id"/>
</statement>
</dblookup>
[1]-https://docs.wso2.com/display/EI640/Managing+the+Registry
[2]-https://ei.docs.wso2.com/en/7.2.0/micro-integrator/references/mediators/dBLookup-Mediator/#connection-pool-configurations
[3]-https://ei.docs.wso2.com/en/7.2.0/micro-integrator/references/mediators/dBLookup-Mediator/#example