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Converting POX Messages to JSON

The following examples explain different methods of converting POX messages to JSON using the Micro Integrator.

Using the messageType property

Let's convert a POX message to JSON using the messageType property.

Synapse configuration

Following is a sample proxy service configuration that we can use to implement this scenario.

Tip

Note that after the messageType property completes the message convertion, we are using the Respond mediator to return the converted message back to the JSON client.

See the instructions on how to build and run this example.

<?xml version="1.0" encoding="UTF-8"?>
<proxy xmlns="http://ws.apache.org/ns/synapse"
       name="POX_To_JSON_Convert_Msgtype_Proxy"
       startOnLoad="true"
       statistics="disable"
       trace="disable"
       transports="http,https">
   <target>
      <inSequence>
         <property name="messageType" scope="axis2" value="application/json"/>
         <respond/>
      </inSequence>
   </target>
   <description/>
</proxy>

Build and run (example 1)

Create the artifacts:

  1. Set up WSO2 Integration Studio.
  2. Create an integration project with an ESB Configs module and an Composite Exporter.
  3. Create the proxy service with the configurations given above.
  4. Deploy the artifacts in your Micro Integrator.

Invoke the proxy service:

  • HTTP method: POST
  • Request URL: http://localhost:8290/services/POX_To_JSON_Convert_Msgtype_Proxy
  • Content-Type: text/xml
  • Message Body: 
    <soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
   <soapenv:Header/>
   <soapenv:Body>
   <SpaceX_LaunchPads>
      <Station>
          <Name>Kennedy Space Center Historic Launch Complex 39A</Name>
          <Short_Name>KSC LC 39A</Short_Name>
          <Launches>
              <Attempts>18</Attempts>
              <Successful>18</Successful>
          </Launches>
          <Region>Florida</Region>
          <Latitude>28.6080585</Latitude>
          <Longitude>-80.6039558</Longitude>
          <WIKI_Link>https://en.wikipedia.org/wiki/Kennedy_Space_Center_Launch_Complex_39#Launch_Pad_39A</WIKI_Link>
      </Station>
  </SpaceX_LaunchPads>
   </soapenv:Body>
</soapenv:Envelope>

The converted JSON response is returned as follows:

{
    "Envelope": {
        "Header": null,
        "Body": {
            "SpaceX_LaunchPads": {
                "Station": {
                    "Name": "Kennedy Space Center Historic Launch Complex 39A",
                    "Short_Name": "KSC LC 39A",
                    "Launches": {
                        "Attempts": 18,
                        "Successful": 18
                    },
                    "Region": "Florida",
                    "Latitude": 28.6080585,
                    "Longitude": -80.6039558,
                    "WIKI_Link": "https://en.wikipedia.org/wiki/Kennedy_Space_Center_Launch_Complex_39#Launch_Pad_39A"
                }
            }
        }
    }
}

Using the PayloadFactory Mediator

Let's convert a POX message to JSON using a PayloadFactory mediator.

Synapse configuration

Following is a sample proxy service configuration that we can use to implement this scenario.

Tip

Note that after the PayloadFactory mediator completes the message convertion, we are using the Respond mediator to return the converted message back to the JSON client.

See the instructions on how to build and run this example.

<?xml version="1.0" encoding="UTF-8"?>
<proxy xmlns="http://ws.apache.org/ns/synapse"
       name="POX_To_JSON_Convert_PayloadFactory_Proxy"
       startOnLoad="true"
       statistics="disable"
       trace="disable"
       transports="http,https">
   <target>
      <inSequence>
         <payloadFactory media-type="json">
            <format>
            {
        "name": "$1",
        "location": {
            "region": "$2",
            "latitude": $3,
            "longitude": $4
        },
        "attempted_launches": $5,
        "successful_launches": $6,
        "wikipedia": "$7",
        "site_name_long": "$8"
        }
            </format>
            <args>
               <arg evaluator="xml" expression="//SpaceX_LaunchPads/Station/Short_Name"/>
               <arg evaluator="xml" expression="//SpaceX_LaunchPads/Station/Region"/>
               <arg evaluator="xml" expression="//SpaceX_LaunchPads/Station/Latitude"/>
               <arg evaluator="xml" expression="//SpaceX_LaunchPads/Station/Longitude"/>
               <arg evaluator="xml" expression="//SpaceX_LaunchPads/Station/Launches/Attempts"/>
               <arg evaluator="xml" expression="//SpaceX_LaunchPads/Station/Launches/Successful"/>
               <arg evaluator="xml" expression="//SpaceX_LaunchPads/Station/WIKI_Link"/>
               <arg evaluator="xml" expression="//SpaceX_LaunchPads/Station/Name"/>
            </args>
         </payloadFactory>
         <respond/>
      </inSequence>
   </target>
   <description/>
</proxy>

Build and run (example 2)

Create the artifacts:

  1. Set up WSO2 Integration Studio.
  2. Create an integration project with an ESB Configs module and an Composite Exporter.
  3. Create the proxy service with the configurations given above.
  4. Deploy the artifacts in your Micro Integrator.

Invoke the proxy service:

  • HTTP method: POST
  • Request URL: http://localhost:8290/services/POX_To_JSON_Convert_PayloadFactory_Proxy
  • Content-Type: text/xml
  • Message Body: 
    <SpaceX_LaunchPads>
    <Station>
        <Name>Kennedy Space Center Historic Launch Complex 39A</Name>
        <Short_Name>KSC LC 39A</Short_Name>
        <Launches>
            <Attempts>18</Attempts>
            <Successful>18</Successful>
        </Launches>
        <Region>Florida</Region>
        <Latitude>28.6080585</Latitude>
        <Longitude>-80.6039558</Longitude>
        <WIKI_Link>https://en.wikipedia.org/wiki/Kennedy_Space_Center_Launch_Complex_39#Launch_Pad_39A</WIKI_Link>
    </Station>
</SpaceX_LaunchPads>

The converted JSON response is returned as follows:

{
    "name": "KSC LC 39A",
    "location": {
        "region": "Florida",
        "latitude": 28.6080585,
        "longitude": -80.6039558
    },
    "attempted_launches": 18,
    "successful_launches": 18,
    "wikipedia": "https://en.wikipedia.org/wiki/Kennedy_Space_Center_Launch_Complex_39#Launch_Pad_39A",
    "site_name_long": "Kennedy Space Center Historic Launch Complex 39A"
}