Mule - Default Service Exception Strategy

Default Service Exception Strategy can be defined to a Model or to each individual service inside a model and it defines the functionality Mule has to perform when an unhandled exception is thrown during a message processing.

<?xml version="1.0" encoding="UTF-8"?>

<mule xmlns="http://www.mulesource.org/schema/mule/core/2.2"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:stdio="http://www.mulesource.org/schema/mule/stdio/2.2"

    xmlns:file="http://www.mulesource.org/schema/mule/file/2.2"

    xmlns:vm="http://www.mulesource.org/schema/mule/vm/2.2" xmlns:smtp="http://www.mulesource.org/schema/mule/smtp/2.2"

    xmlns:spring="www.springframework.org/schema/beans"

    xsi:schemaLocation="

       http://www.mulesource.org/schema/mule/core/2.2 http://www.mulesource.org/schema/mule/core/2.2/mule.xsd

       http://www.mulesource.org/schema/mule/stdio/2.2 http://www.mulesource.org/schema/mule/stdio/2.2/mule-stdio.xsd

       http://www.mulesource.org/schema/mule/file/2.2 http://www.mulesource.org/schema/mule/file/2.2/mule-file.xsd

       http://www.mulesource.org/schema/mule/vm/2.2 http://www.mulesource.org/schema/mule/vm/2.2/mule-vm.xsd

       http://www.mulesource.org/schema/mule/smtp/2.2 http://www.mulesource.org/schema/mule/smtp/2.2/mule-smtp.xsd

       www.springframework.org/schema/beans www.springframework.org/schema/beans/spring-beans-2.5.xsd">

    <stdio:connector name="stdioInConnector"

        outputMessage="Data : " promptMessage="Enter your name : " />

    <custom-transformer

        class="org.mybusiness.transformers.StringToNameTransformer"

        name="stringToNameTransformer" />

    <model>

        <default-service-exception-strategy>

            <vm:outbound-endpoint path="processExceptionIN"/>

        </default-service-exception-strategy>

        <service name="StdioService">

            <inbound>

                <stdio:inbound-endpoint system="IN"

                    connector-ref="stdioInConnector" />

            </inbound>

            <outbound>

                <pass-through-router>

                    <vm:outbound-endpoint path="processInputIN" />

                </pass-through-router>

            </outbound>

        </service>

        <service name="ProcessInput">

            <inbound>

                <vm:inbound-endpoint path="processInputIN">

                    <transformers>

                        <transformer ref="stringToNameTransformer" />

                    </transformers>

                </vm:inbound-endpoint>

            </inbound>

            <component class="org.mybusiness.components.ProcessInputComponent" />

            <outbound>

                <filtering-router>

                    <vm:outbound-endpoint path="computeLengthIN" />

                    <and-filter>

                        <expression-filter expression="firstName='vijay'"

                            evaluator="jxpath" />

                        <expression-filter expression="lastName='san'"

                            evaluator="jxpath" />

                    </and-filter>

                </filtering-router>

            </outbound>

        </service>

        <service name="ComputeLength">

            <inbound>

                <vm:inbound-endpoint path="computeLengthIN" />

            </inbound>

            <component

                class="org.mybusiness.components.ComputeLengthComponent" />

        </service>

        <service name="ProcessException">

            <inbound>

                <vm:inbound-endpoint path="processExceptionIN" />

            </inbound>

            <component

                class="org.mybusiness.components.ExceptionHandlerComponent" />

        </service>

    </model>

</mule>

ExceptionHandlerComponent Class

package org.mybusiness.components;

import org.mule.message.ExceptionMessage;

public class ExceptionHandlerComponent {

public void handleException(ExceptionMessage ex) {

System.out.println("Into ExceptionHandlerComponent " + ex.getException().getMessage());

}

}