[mule-user] org.mule.api.transport.NoReceiverForEndpointException: vm0

[Fang Digou]

This example realized this function ,when you input a Integer 5,first the Square.java can change the 5 to 25,then using the Inverse.java,the output answer will be -25,but
it always reported some errors.

the configuration file:
<service name="Square">
<inbound>
<vm:inbound-endpoint path="math" />
</inbound>
<component class="shou.mule.Square"/>
<outbound>
<pass-through-router>
<vm:outbound-endpoint path="inverse" />
</pass-through-router>
</outbound>
</service>

<service name="Inverse">
<inbound>
<vm:inbound-endpoint path="inverse" />
</inbound>
<component class="shou.mule.Inverse"/>
</service>

the test client :MuleClient1.java

package shou.mule;

import org.mule.api.MuleException;
import org.mule.api.MuleMessage;
import org.mule.module.client.MuleClient;

public class ClientTest1 {
public static void main(String[] args){
MuleClient client = null;
try {
client = new MuleClient();
String url = "vm://math";

MuleMessage message = client.send(url,5,null);
Integer obj = (Integer) message.getPayload();
System.out.println(obj.intValue());

} catch (MuleException e) {
e.printStackTrace();
}finally{
client.dispose();
}

}
}

the two java component :
Square.java:
package shou.mule;

public class Square {
private int payload=0;
public int square(int num) {
payload=num*num;
return payload;
}
}

Inverse.java:
package shou.mule;

public class Inverse {
private int iresult=0;
public int inverse(int num) {
iresult=num*(-1);
return iresult;
}
}
when i tested this example,it always reported this errors:

org.mule.api.transport.DispatchException: Failed to route event via endpoint: DefaultOutboundEndpoint{endpointUri=vm://math, connector=VMConnector{this=12a3793, started=true, initialised=true, name='connector.VM.0', disposed=false, numberOfConcurrentTransactedReceivers=4, createMultipleTransactedReceivers=true, connected=true, supportedProtocols=[vm], serviceOverrides=null}, transformer=[], name='endpoint.vm.math', properties={}, transactionConfig=Transaction{factory=null, action=NEVER, timeout=0}, filter=null, deleteUnacceptedMessages=false, securityFilter=null, synchronous=false, initialState=started, remoteSync=false, remoteSyncTimeout=10000, endpointEncoding=UTF-8}. Message payload is of type: Integer
at org.mule.transport.AbstractMessageDispatcher.send(AbstractMessageDispatcher.java:195)
at org.mule.transport.AbstractConnector.send(AbstractConnector.java:1929)
at org.mule.endpoint.DefaultOutboundEndpoint.send(DefaultOutboundEndpoint.java:77)
at org.mule.DefaultMuleSession.sendEvent(DefaultMuleSession.java:327)
at org.mule.module.client.MuleClient.send(MuleClient.java:650)
at org.mule.module.client.MuleClient.send(MuleClient.java:627)
at org.mule.module.client.MuleClient.send(MuleClient.java:580)
at shou.mule.ClientTest1.main(ClientTest1.java:14)
Caused by: org.mule.api.transport.NoReceiverForEndpointException: There is no receiver registered on connector "connector.VM.0" for endpointUri vm://math
at org.mule.transport.vm.VMMessageDispatcher.doSend(VMMessageDispatcher.java:109)
at org.mule.transport.AbstractMessageDispatcher.send(AbstractMessageDispatcher.java:168)
... 7 more

would you give me some answers,thank you again.

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[Dirk Olmes]

Fang Digou wrote:
> This example realized this function ,when you input a Integer 5,first the Square.java can change the 5 to 25,then using the Inverse.java,the output answer will be -25,but
> it always reported some errors.
>
> the configuration file:
> <service name="Square">
> <inbound>
> <vm:inbound-endpoint path="math" />
> </inbound>
> <component class="shou.mule.Square"/>
> <outbound>
> <pass-through-router>
> <vm:outbound-endpoint path="inverse" />
> </pass-through-router>
> </outbound>
> </service>
>
> <service name="Inverse">
> <inbound>
> <vm:inbound-endpoint path="inverse" />
> </inbound>
> <component class="shou.mule.Inverse"/>
> </service>

you're using async endpoints, I'm not sure if that's what you want. Try
making all endpoints sync.

-dirk

[Fang Digou]

Thank you for Dirk,under your suggestion, I added synchronous="true" to each vm,but it also reported that errors,I really don"t know why?

maybe there is something wrong with the the java component Square.java and Inverse.java.

[David Dossot]

I don't see where you're loading your Mule config: it seems you're running against an empty Mule instance.

Try:  client = new MuleClient("your-mule-config.xml");

Also: why making your components statefull?

D.

[Fang Digou]

Hello,David
First,thank you for your answers,your suggestion is very good .
when i tried " client = new MuleClient("your-mule-config.xml");" it did wonders,
all error gone away.
i don"t understand the meaning of " why making your components statefull?"
*can you give me an example.*

else :it also reported errors:
2010-1-19 15:09:59 org.apache.cxf.bus.spring.BusApplicationContext getConfigResources
&#20449;&#24687;: No cxf.xml configuration file detected, relying on defaults.
Exception in thread "main" java.lang.ClassCastException: org.mule.transport.NullPayload cannot be cast to java.lang.Integer
at shou.mule.ClientTest1.main(ClientTest1.java:15)

thank you again.

-Fang

[Dirk Olmes]

Fang Digou wrote:
> Hello,David
> First,thank you for your answers,your suggestion is very good .
> when i tried " client = new MuleClient("your-mule-config.xml");" it did wonders,
> all error gone away.

I'm glad it helped :-)

> i don"t understand the meaning of " why making your components statefull?"
> *can you give me an example.*

Have a look at one of your classes:

public class Square {
private int payload=0;

public int square(int num) {
payload=num*num;
return payload;
}
}

it has an instance variable "payload" that holds the result of the
computation. Why would you hold on to that state? The square() method
should just return the result of the calculation.

-dirk

[David Dossot]

Exception in thread "main" java.lang.ClassCastException: org.mule.transport.NullPayload cannot be cast to java.lang.Integer
       at shou.mule.ClientTest1.main(ClientTest1.java:15)

Are you sure you've made the "vm://math" inbound endpoint synchronous?

D.

[Fang Digou]

yes i'm sure.maybe there exist any other problems.

[David Dossot]

is your component called when you get this null response?

d.