interceptorinvoker.java

bpel执行引擎用来执行bpel业务流程

/*
 * 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.ode.bpel.intercept;

import org.apache.ode.bpel.iapi.MessageExchange;
import org.apache.ode.bpel.iapi.MyRoleMessageExchange;
import org.apache.ode.bpel.iapi.PartnerRoleMessageExchange;
import org.apache.ode.bpel.intercept.MessageExchangeInterceptor.InterceptorContext;

/**
 * Helper for invoking the appropriate {@link org.apache.ode.bpel.intercept.MessageExchangeInterceptor}
 * method -- basically a work-around for lack of closures. 
 * @author mszefler
 *
 */
public abstract class InterceptorInvoker {

	private final String _name;
	// Closures anyone? 
	
	/** Invoke {@link MessageExchangeInterceptor#onProcessInvoked(MyRoleMessageExchange, InterceptorContext)} */
	public static final InterceptorInvoker  __onProcessInvoked= new InterceptorInvoker("onProcessInvoked") {
		public void invoke(MessageExchangeInterceptor i, MessageExchange mex, InterceptorContext ictx) 
			throws FailMessageExchangeException, FaultMessageExchangeException {
			i.onProcessInvoked((MyRoleMessageExchange) mex, ictx);
		}
	};
	
	/** Invoke {@link MessageExchangeInterceptor#onBpelServerInvoked(MyRoleMessageExchange, InterceptorContext)} */
	public static final InterceptorInvoker __onBpelServerInvoked = new InterceptorInvoker("onBpelServerInvoked") {
		public void invoke(MessageExchangeInterceptor i, MessageExchange mex, InterceptorContext ictx) 
			throws FailMessageExchangeException, FaultMessageExchangeException {
			i.onBpelServerInvoked((MyRoleMessageExchange) mex, ictx);
		}
	};

	/** Invoke {@link MessageExchangeInterceptor#onPartnerInvoked(PartnerRoleMessageExchange, InterceptorContext)} */
	public static final InterceptorInvoker __onPartnerInvoked = new InterceptorInvoker("onPartnerInvoked") {
		public void invoke(MessageExchangeInterceptor i, MessageExchange mex, InterceptorContext ictx) 
			throws FailMessageExchangeException, FaultMessageExchangeException {
			i.onPartnerInvoked((PartnerRoleMessageExchange) mex, ictx);
		}
	};

	/** Invoke {@link MessageExchangeInterceptor#onPartnerInvoked(PartnerRoleMessageExchange, InterceptorContext)} */
	public static final InterceptorInvoker __onNewInstanceInvoked = new InterceptorInvoker("onNewInstanceInvoked") {
		public void invoke(MessageExchangeInterceptor i, MessageExchange mex, InterceptorContext ictx) 
			throws FailMessageExchangeException, FaultMessageExchangeException {
			i.onNewInstanceInvoked((MyRoleMessageExchange) mex, ictx);
		}
	};


	private InterceptorInvoker(String name) {
		_name = name;
	}
	
	public abstract void invoke(MessageExchangeInterceptor i, MessageExchange mex, InterceptorContext ictx)
		throws FailMessageExchangeException, FaultMessageExchangeException;
	
	public String toString() {
		return InterceptorInvoker.class.getName() + "." + _name;
	}
}