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/**
*
* Copyright 2005 The Apache Software Foundation or its licensors, as applicable.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
* an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*/
package org.apache.tuscany.core.invocation.impl;
import org.apache.tuscany.core.invocation.Interceptor;
import org.apache.tuscany.core.invocation.InvocationRuntimeException;
import org.apache.tuscany.core.invocation.TargetInvoker;
import org.apache.tuscany.core.message.Message;
/**
* Serves as a tail interceptor on a target invocation chain. This implementation dispatches to the target invoker
* passed inside the invocation message. Target invokers are passed from the source in order to allow for caching of
* target instances.
*
* @see org.apache.tuscany.core.invocation.TargetInvoker
* @version $Rev$ $Date$
*/
public class InvokerInterceptor implements Interceptor {
public InvokerInterceptor() {
}
public Message invoke(Message msg) throws InvocationRuntimeException {
TargetInvoker invoker = msg.getTargetInvoker();
if (invoker == null) {
throw new InvocationRuntimeException("No target invoker specified on message");
}
return invoker.invoke(msg);
}
public void setNext(Interceptor next) {
throw new IllegalStateException("This interceptor must be the last one in an target interceptor chain");
}
}
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