/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.wire;
import org.apache.tuscany.spi.wire.Interceptor;
import org.apache.tuscany.spi.wire.InvocationRuntimeException;
import org.apache.tuscany.spi.wire.Message;
import org.apache.tuscany.spi.wire.TargetInvoker;
/**
* Serves as a tail interceptor on a target wire chain. This implementation dispatches to the target invoker passed
* inside the wire message. Target invokers are passed from the source in order to allow for caching of target
* instances.
*
* @version $Rev: 430937 $ $Date: 2006-08-11 18:17:56 -0700 (Fri, 11 Aug 2006) $
* @see org.apache.tuscany.spi.wire.TargetInvoker
*/
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");
}
public Interceptor getNext() {
return null;
}
public boolean isOptimizable() {
return true;
}
}