How to integrate WSO2 ESB File Connector with Gmail Connector?

In this section, I am going to describe a connector scenario by integrating the File Connector with the Gmail connector. For an example, you can use the File Connector to read a file content and send that content using Gmail Connector.

Environment Setup

• Download ESB 5.0.0 from here.
• Upload the following connectors. (Refer this to add and enable the connector)
• fileconnector-connector-2.0.6
• gmail-connector-3.0.4
• Follow the instruction to get the credential for the Gmail connector.

Following is a sample proxy service that illustrates how to test the above scenario.

 <?xml version="1.0" encoding="UTF-8"?>  
 <proxy xmlns="http://ws.apache.org/ns/synapse" name="Read_AND_sendMail" transports="https,http" statistics="disable" trace="disable" startOnLoad="true">  
   <target>  
    <inSequence>  
      <property name="source" expression="json-eval($.source)" />  
      <property name="contentType" expression="json-eval($.contentType)" />  
      <property name="filePattern" expression="json-eval($.filePattern)" />  
      <property name="userId" expression="json-eval($.userId)" />  
      <property name="refreshToken" expression="json-eval($.refreshToken)" />  
      <property name="clientId" expression="json-eval($.clientId)" />  
      <property name="clientSecret" expression="json-eval($.clientSecret)" />  
      <property name="accessToken" expression="json-eval($.accessToken)" />  
      <property name="accessTokenRegistryPath" expression="json-eval($.accessTokenRegistryPath)" />  
      <property name="apiUrl" expression="json-eval($.apiUrl)" />  
      <property name="to" expression="json-eval($.to)" />  
      <property name="subject" expression="json-eval($.subject)" />  
      <property name="from" expression="json-eval($.from)" />  
      <property name="cc" expression="json-eval($.cc)" />  
      <property name="bcc" expression="json-eval($.bcc)" />  
      <property name="apiUrl" expression="json-eval($.apiUrl)" />  
      <fileconnector.read>  
       <source>{$ctx:source}</source>  
       <contentType>{$ctx:contentType}</contentType>  
       <filePattern>{$ctx:filePattern}</filePattern>  
      </fileconnector.read>  
      <enrich>  
       <source type="body" clone="true" />  
       <target type="property" property="mailContent" />  
      </enrich>  
      <log level="custom">  
       <property name="!!!!!!!!! fileReadContent !!!!!!!!!!!!" expression="get-property('mailContent')" />  
      </log>  
      <gmail.init>  
       <userId>{$ctx:userId}</userId>  
       <refreshToken>{$ctx:refreshToken}</refreshToken>  
       <clientSecret>{$ctx:clientSecret}</clientSecret>  
       <clientId>{$ctx:clientId}</clientId>  
       <accessTokenRegistryPath>{$ctx:accessTokenRegistryPath}</accessTokenRegistryPath>  
       <accessToken>{$ctx:accessToken}</accessToken>  
       <apiUrl>{$ctx:apiUrl}</apiUrl>  
      </gmail.init>  
      <gmail.sendMail>  
       <to>{$ctx:to}</to>  
       <subject>{$ctx:subject}</subject>  
       <from>{$ctx:from}</from>  
       <cc>{$ctx:cc}</cc>  
       <bcc>{$ctx:bcc}</bcc>  
       <messageBody>{$ctx:mailContent}</messageBody>  
      </gmail.sendMail>  
      <respond />  
    </inSequence>  
   </target>  
   <description />  
 </proxy>  

Sample Request

 {   
   "source":"/home/vive/Desktop/FILE/",  
   "contentType":"text/plain",  
   "filePattern":"mailContent.txt",  
   "userId":"MailId",  
   "refreshToken":"1/3e68t0-PSxxxxxxxxx",  
   "clientSecret":"qlCLwJxxxxxxxxxxxxxxxx",  
   "clientId":"5924732841xxxxxxxxxxx",  
   "accessTokenRegistryPath":"Connector/Gmail",  
   "accessToken":"ya29.CjHhAptvMndCCahMeuJpxxxxxxxxxxx",  
   "apiUrl":"https://www.googleapis.com/gmail",  
   "to":"user001@gmail.com",  
   "subject":"Integrate WSO2 ESB File Connector with Gmail Connector",  
   "cc":"user002@gamil.com",  
   "bcc":"user032@gmail.com"  
 }