Custom Inbound Endpoint

The ESB profile of WSO2 Enterprise Integrator (WSO2 EI) supports several inbound endpoints, but there can be scenarios that require functionality not provided by the existing inbound endpoints. For example, you might need an inbound endpoint to connect to a certain back-end server or vendor specific protocol.

To support such scenarios, you can write your own custom inbound endpoint by extending the behavior for listening, polling, and event-based inbound endpoints.

Custom listening inbound endpoint

Following is a sample custom listening inbound endpoint configuration:

<inboundEndpoint xmlns="http://ws.apache.org/ns/synapse" name="custom_listener" sequence="request" onError="fault"
	                 class="org.wso2.carbon.inbound.custom.listening.SampleListeningEP" suspend="false">
   <parameters>
      <parameter name="sequential">true</parameter>
	  <parameter name="inbound.behavior">listening</parameter>
      <parameter name="coordination">true</parameter>
   </parameters>
</inboundEndpoint>

In addition to the parameters provided in the above sample configuration, you can provide other required parameters based on the listening behaviour you need to implement.

Custom listening inbound endpoint parameters

Parameter Name	Description	Required	Possible Values	Default Value
class	Name of the custom class implementation	Yes	A valid class name	n/a
sequence	Name of the sequence message that should be injected	Yes	A valid sequence name	n/a
onError	Name of the fault sequence that should be invoked in case of failure	Yes	A valid fault sequence name	n/a
inbound.behavior	The behaviour of the inbound endpoint	Yes	`listening`	n/a

You can download the maven artifact used in the sample custom listening inbound endpoint configuration above from Custom listening inbound endpoint sample .

You need to copy the built jar file to the <EI_HOME>/lib directory and restart WSO2 EI to load the class.

Custom polling inbound endpoint

Following is a sample custom polling inbound endpoint configuration:

<inboundEndpoint xmlns="http://ws.apache.org/ns/synapse" name="class" sequence="request" onError="fault"
                            class="org.wso2.carbon.inbound.custom.poll.SamplePollingClient" suspend="false">
   <parameters>
      <parameter name="sequential">true</parameter>
      <parameter name="interval">2000</parameter>
      <parameter name="coordination">true</parameter>
   </parameters>
</inboundEndpoint>

Custom polling inbound endpoint parameters

Parameter Name	Description	Required	Possible Values	Default Value
class	Name of the custom class implementation	Yes	A valid class name	n/a

You can download the maven artifact used in the sample custom polling inbound endpoint configuration above from Custom polling inbound endpoint sample.

You need to copy the built jar file to the <EI_HOME>/lib directory and restart WSO2 EI to load the class.

Custom event-based inbound endpoint

Following is a sample custom event-based inbound endpoint configuration:

<inboundEndpoint xmlns="http://ws.apache.org/ns/synapse" name="custom_waiting" sequence="request" onError="fault"
	                 class="org.wso2.carbon.inbound.custom.wait.SampleWaitingClient" suspend="false">
   <parameters>
      <parameter name="sequential">true</parameter>
	  <parameter name="inbound.behavior">eventBased</parameter>
      <parameter name="coordination">true</parameter>
   </parameters>
</inboundEndpoint>

In addition to the parameters provided in the above sample configuration, you can provide other required parameters based on the event-based behaviour you need to implement.

Custom event-based inbound endpoint parameters

Parameter Name	Description	Required	Possible Values	Default Value
class	Name of the custom class implementation	Yes	A valid class name	n/a
sequence	Name of the sequence message that should be injected	Yes	A valid sequence name	n/a
onError	Name of the fault sequence that should be invoked in case of failure	Yes	A valid fault sequence name	n/a
inbound.behavior	The behaviour of the inbound endpoint	Yes	`event-based`	n/a

You can download the maven artifact used in the sample custom event-based inbound endpoint configuration above from Custom event-based inbound endpoint sample .

You need to copy the built jar file to the <EI_HOME>/lib directory and restart the the ESB profile to load the class.