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package org.mule.util.monitor; |
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import org.mule.umo.lifecycle.Disposable; |
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import java.util.Iterator; |
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import java.util.Map; |
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import java.util.Timer; |
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import java.util.TimerTask; |
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import edu.emory.mathcs.backport.java.util.concurrent.ConcurrentHashMap; |
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import org.apache.commons.logging.Log; |
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import org.apache.commons.logging.LogFactory; |
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public class ExpiryMonitor extends TimerTask implements Disposable |
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{ |
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38 | 0 | protected static final Log logger = LogFactory.getLog(ExpiryMonitor.class); |
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private Timer timer; |
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private Map monitors; |
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public ExpiryMonitor() |
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{ |
45 | 0 | this(1000); |
46 | 0 | } |
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public ExpiryMonitor(long monitorFrequency) |
49 | 0 | { |
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51 | 0 | timer = new Timer(true); |
52 | 0 | timer.schedule(this, monitorFrequency, monitorFrequency); |
53 | 0 | monitors = new ConcurrentHashMap(); |
54 | 0 | } |
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public void addExpirable(long milliseconds, Expirable expirable) |
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{ |
65 | 0 | if (isRegistered(expirable)) |
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{ |
67 | 0 | resetExpirable(expirable); |
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} |
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else |
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{ |
71 | 0 | if (logger.isDebugEnabled()) |
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{ |
73 | 0 | logger.debug("Adding new expirable: " + expirable); |
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} |
75 | 0 | monitors.put(expirable, new ExpirableHolder(milliseconds, expirable)); |
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} |
77 | 0 | } |
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public boolean isRegistered(Expirable expirable) |
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{ |
81 | 0 | return (monitors.get(expirable) != null); |
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} |
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public void removeExpirable(Expirable expirable) |
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{ |
86 | 0 | if (logger.isDebugEnabled()) |
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{ |
88 | 0 | logger.debug("Removing expirable: " + expirable); |
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} |
90 | 0 | monitors.remove(expirable); |
91 | 0 | } |
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public void resetExpirable(Expirable expirable) |
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{ |
95 | 0 | ExpirableHolder eh = (ExpirableHolder) monitors.get(expirable); |
96 | 0 | if (eh != null) |
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{ |
98 | 0 | eh.reset(); |
99 | 0 | if (logger.isDebugEnabled()) |
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{ |
101 | 0 | logger.debug("Reset expirable: " + expirable); |
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} |
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} |
104 | 0 | } |
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public void run() |
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{ |
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ExpirableHolder holder; |
112 | 0 | for (Iterator iterator = monitors.values().iterator(); iterator.hasNext();) |
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{ |
114 | 0 | holder = (ExpirableHolder) iterator.next(); |
115 | 0 | if (holder.isExpired()) |
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{ |
117 | 0 | removeExpirable(holder.getExpirable()); |
118 | 0 | holder.getExpirable().expired(); |
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} |
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} |
121 | 0 | } |
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public void dispose() |
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{ |
125 | 0 | logger.info("disposing monitor"); |
126 | 0 | timer.cancel(); |
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ExpirableHolder holder; |
128 | 0 | for (Iterator iterator = monitors.values().iterator(); iterator.hasNext();) |
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{ |
130 | 0 | holder = (ExpirableHolder) iterator.next(); |
131 | 0 | removeExpirable(holder.getExpirable()); |
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try |
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{ |
134 | 0 | holder.getExpirable().expired(); |
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} |
136 | 0 | catch (Exception e) |
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{ |
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139 | 0 | logger.debug(e.getMessage()); |
140 | 0 | } |
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} |
142 | 0 | } |
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private class ExpirableHolder |
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{ |
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private long milliseconds; |
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private Expirable expirable; |
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private long created; |
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public ExpirableHolder(long milliseconds, Expirable expirable) |
152 | 0 | { |
153 | 0 | this.milliseconds = milliseconds; |
154 | 0 | this.expirable = expirable; |
155 | 0 | created = System.currentTimeMillis(); |
156 | 0 | } |
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public long getMilliseconds() |
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{ |
160 | 0 | return milliseconds; |
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} |
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public Expirable getExpirable() |
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{ |
165 | 0 | return expirable; |
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} |
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public boolean isExpired() |
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{ |
170 | 0 | return (System.currentTimeMillis() - milliseconds) > created; |
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} |
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public void reset() |
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{ |
175 | 0 | created = System.currentTimeMillis(); |
176 | 0 | } |
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} |
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} |