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package org.apache.tapestry.services.impl; |
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import edu.emory.mathcs.backport.java.util.concurrent.locks.ReentrantLock; |
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import org.apache.tapestry.event.ReportStatusEvent; |
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import org.apache.tapestry.event.ReportStatusListener; |
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import org.apache.tapestry.event.ResetEventListener; |
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import org.apache.tapestry.services.ObjectPool; |
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import java.util.*; |
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34 | 0 | public class ObjectPoolImpl implements ObjectPool, ResetEventListener, ReportStatusListener |
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{ |
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private String _serviceId; |
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38 | 0 | private int _count = 0; |
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40 | 0 | private final ReentrantLock _lock = new ReentrantLock(); |
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45 | 0 | private Map _pool = new HashMap(); |
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public Object get(Object key) |
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{ |
49 | 0 | List pooled = (List) _pool.get(key); |
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try |
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{ |
53 | 0 | _lock.lock(); |
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55 | 0 | if (pooled == null || pooled.isEmpty()) |
56 | 0 | return null; |
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58 | 0 | _count--; |
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60 | 0 | return pooled.remove(0); |
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} finally |
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{ |
64 | 0 | _lock.unlock(); |
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} |
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} |
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public void store(Object key, Object value) |
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{ |
70 | 0 | List pooled = (List) _pool.get(key); |
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try |
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{ |
74 | 0 | _lock.lock(); |
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76 | 0 | if (pooled == null) |
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{ |
78 | 0 | pooled = new LinkedList(); |
79 | 0 | _pool.put(key, pooled); |
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} |
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82 | 0 | pooled.add(value); |
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84 | 0 | _count++; |
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} finally |
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{ |
87 | 0 | _lock.unlock(); |
88 | 0 | } |
89 | 0 | } |
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public void resetEventDidOccur() |
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{ |
93 | 0 | _pool.clear(); |
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95 | 0 | _count = 0; |
96 | 0 | } |
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public void reportStatus(ReportStatusEvent event) |
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{ |
100 | 0 | event.title(_serviceId); |
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102 | 0 | event.property("total count", _count); |
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104 | 0 | event.section("Count by Key"); |
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106 | 0 | Iterator i = _pool.entrySet().iterator(); |
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108 | 0 | while (i.hasNext()) |
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{ |
110 | 0 | Map.Entry entry = (Map.Entry) i.next(); |
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112 | 0 | String key = entry.getKey().toString(); |
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114 | 0 | List pooled = (List) entry.getValue(); |
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116 | 0 | event.property(key, pooled.size()); |
117 | 0 | } |
118 | 0 | } |
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public void setServiceId(String serviceId) |
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{ |
122 | 0 | _serviceId = serviceId; |
123 | 0 | } |
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} |