http://ricston.com/blog/?p=2508

iso8583-functional-test-config.xml

<spring:bean id="isoMessageFactory" class="com.solab.iso8583.MessageFactory">
    <spring:property name="configPath" value="j8583.xml"/>
</spring:bean>
 
<flow name="Iso8583Flow">
    <vm:inbound-endpoint path="iso8583.service" exchange-pattern="request-response"/>
 
    <iso8583:iso8583-to-message-transformer>
        <spring:property name="messageFactory" ref="isoMessageFactory"/>
        <spring:property name="isoHeaderLength" value="4"/>
    </iso8583:iso8583-to-message-transformer>
 
    <script:transformer>
        <script:script engine="groovy">
            payload.put(39, new org.mule.module.iso8583.Field().setType(org.mule.module.iso8583.FieldType.NUMERIC).setValue('00').setLength(2))
            return payload
        </script:script>
    </script:transformer>
 
    <message-properties-transformer scope="outbound">
        <add-message-property key="iso8583.mti" value="0810"/>
    </message-properties-transformer>
 
    <iso8583:message-to-iso8583-transformer>
        <spring:property name="messageFactory" ref="isoMessageFactory"/>
    </iso8583:message-to-iso8583-transformer>
</flow>

Iso8583TestCase.java

    // [Header, MTI = 0800, Bitmap, Field 7 = 1226124404, field 11 = 102, Field 70 = 301]
    private static final byte[] ECHO_REQUEST = { 0x30, 0x30, 0x35, 0x35, 0x30, 0x38, 0x30, 0x30, 0x38, 0x32, 0x32, 0x30, 0x30,
                                                 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x34,
                                                 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30,
                                                 0x30, 0x31, 0x32, 0x32, 0x36, 0x31, 0x32, 0x34, 0x34, 0x30, 0x34, 0x30, 0x30,
                                                 0x30, 0x31, 0x30, 0x32, 0x33, 0x30, 0x31 };
 
    // [Header, MTI = 0810, Bitmap, Field 7 = 1226124404, field 11 = 102, Field 35 = 00, Field 70 = 301]
    private static final byte[] ECHO_REPLY =  { 0x30, 0x30, 0x35, 0x35, 0x30, 0x38, 0x31, 0x30, 0x38, 0x32, 0x32, 0x30, 0x30,
                                                0x30, 0x30, 0x30, 0x30, 0x32, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x34,
                                                0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30,
                                                0x30, 0x31, 0x32, 0x32, 0x36, 0x31, 0x32, 0x34, 0x34, 0x30, 0x34, 0x30, 0x30,
                                                0x30, 0x31, 0x30, 0x32, 0x30, 0x30, 0x33, 0x30, 0x31 };
 
    protected String getConfigResources() {
        return "iso8583-functional-test-config.xml";
    }
 
    @Test
    public void testIso8583Service() throws Exception {
        MuleClient client = muleContext.getClient();
        MuleMessage result = client.send("vm://iso8583.service", new DefaultMuleMessage(ECHO_REQUEST, muleContext));
        assertArrayEquals(ECHO_REPLY, (byte[]) result.getPayload());
    }
 
}

j8583.xml

<j8583-config>
    <header type="0810">0055</header>
    <parse type="0800">
        <field num="7" type="NUMERIC" length="10" />
        <field num="11" type="NUMERIC" length="6"/>
        <field num="70" type="ALPHA" length="3"/>
    </parse>
</j8583-config>