| /* |
| * 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.engine; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Comparator; |
| import java.util.List; |
| |
| /** |
| * @author Matthieu Riou <mriou at apache dot org> |
| */ |
| public class CountLRUDehydrationPolicy implements DehydrationPolicy { |
| |
| /** Maximum age of a process before it is quiesced */ |
| private long _processMaxAge = 20 * 60 * 1000; |
| /** Maximum process count before oldest ones get quiesced */ |
| private int _processMaxCount = 1000; |
| |
| public List<BpelProcess> markForDehydration(List<BpelProcess> runningProcesses) { |
| ArrayList<BpelProcess> ripped = new ArrayList<BpelProcess>(); |
| |
| if (_processMaxAge > 0) { |
| // The oldies have to go first |
| long now = System.currentTimeMillis(); |
| for (BpelProcess process : runningProcesses) { |
| if (now - process.getLastUsed() > _processMaxAge) { |
| ripped.add(process); |
| } |
| } |
| } |
| |
| // If it's not enough, other ones must be put to the axe |
| if (runningProcesses.size() - ripped.size() > _processMaxCount) { |
| runningProcesses.removeAll(ripped); |
| Collections.sort(runningProcesses, new Comparator<BpelProcess>() { |
| public int compare(BpelProcess p1, BpelProcess p2) { |
| if (p1.getLastUsed() > p2.getLastUsed()) return -1; |
| if (p1.getLastUsed() < p2.getLastUsed()) return 1; |
| return 0; |
| } |
| }); |
| for (int m = _processMaxCount; m < runningProcesses.size(); m++) { |
| ripped.add(runningProcesses.get(m)); |
| } |
| } |
| |
| return ripped; |
| } |
| |
| public void setProcessMaxAge(long processMaxAge) { |
| _processMaxAge = processMaxAge; |
| } |
| |
| public void setProcessMaxCount(int processMaxCount) { |
| _processMaxCount = processMaxCount; |
| } |
| } |