/*
* 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.MyRoleMessageExchange;
import org.apache.ode.bpel.runtime.InvalidProcessException;
/**
* An example of a simple interceptor providing a "throttling" capability - that is an
* ability to limit the size of processes created in a server.
*/
public class ProcessSizeThrottler extends NoOpInterceptor {
@Override
public void onJobScheduled(MyRoleMessageExchange mex,
InterceptorContext ic) throws FailMessageExchangeException,
FaultMessageExchangeException {
while (ic.getBpelEngine().getHydratedProcessSize(ic.getBpelProcess().getPID()) > ic.getBpelEngine().getProcessThrottledMaximumSize()) {
if (!ic.getBpelEngine().dehydrateLastUnusedProcess()) {
mex.setProperty("causeCode", String.valueOf(InvalidProcessException.TOO_HUGE_PROCESSES_CAUSE_CODE));
throw new FailMessageExchangeException("The size of all running processes is more than the upper limit (" + ic.getBpelEngine().getProcessThrottledMaximumSize() + ")");
}
}
}
}