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package org.mule.util.monitor; |
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import org.mule.api.lifecycle.Disposable; |
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import org.mule.config.i18n.CoreMessages; |
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import org.mule.util.concurrent.DaemonThreadFactory; |
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import java.util.Iterator; |
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import java.util.Map; |
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import edu.emory.mathcs.backport.java.util.concurrent.ConcurrentHashMap; |
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import edu.emory.mathcs.backport.java.util.concurrent.ScheduledThreadPoolExecutor; |
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import edu.emory.mathcs.backport.java.util.concurrent.TimeUnit; |
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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 implements Runnable, Disposable |
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{ |
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32 | 0 | protected static final Log logger = LogFactory.getLog(ExpiryMonitor.class); |
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protected ScheduledThreadPoolExecutor scheduler; |
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private Map monitors; |
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private int monitorFrequency; |
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private String name; |
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private ClassLoader contextClassLoader; |
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public ExpiryMonitor(String name) |
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{ |
46 | 0 | this(name, 1000); |
47 | 0 | } |
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public ExpiryMonitor(String name, int monitorFrequency) |
50 | 0 | { |
51 | 0 | this.name = name; |
52 | 0 | this.monitorFrequency = monitorFrequency; |
53 | 0 | init(); |
54 | 0 | } |
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public ExpiryMonitor(String name, int monitorFrequency, ClassLoader contextClassLoader) |
57 | 0 | { |
58 | 0 | this.name = name; |
59 | 0 | this.monitorFrequency = monitorFrequency; |
60 | 0 | this.contextClassLoader = contextClassLoader; |
61 | 0 | init(); |
62 | 0 | } |
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public ExpiryMonitor(String name, int monitorFrequency, ScheduledThreadPoolExecutor scheduler) |
65 | 0 | { |
66 | 0 | this.name = name; |
67 | 0 | this.monitorFrequency = monitorFrequency; |
68 | 0 | this.scheduler = scheduler; |
69 | 0 | init(); |
70 | 0 | } |
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protected void init() |
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{ |
74 | 0 | if (monitorFrequency <= 0) |
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{ |
76 | 0 | throw new IllegalArgumentException(CoreMessages.propertyHasInvalidValue("monitorFrequency", |
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new Integer(monitorFrequency)).toString()); |
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} |
79 | 0 | monitors = new ConcurrentHashMap(); |
80 | 0 | if (scheduler == null) |
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{ |
82 | 0 | this.scheduler = new ScheduledThreadPoolExecutor(1); |
83 | 0 | scheduler.setThreadFactory(new DaemonThreadFactory(name + ".expiry.monitor", contextClassLoader)); |
84 | 0 | scheduler.scheduleWithFixedDelay(this, 0, monitorFrequency, |
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TimeUnit.MILLISECONDS); |
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} |
87 | 0 | } |
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public void addExpirable(long value, TimeUnit timeUnit, Expirable expirable) |
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{ |
99 | 0 | if (isRegistered(expirable)) |
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{ |
101 | 0 | resetExpirable(expirable); |
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} |
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else |
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{ |
105 | 0 | if (logger.isDebugEnabled()) |
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{ |
107 | 0 | logger.debug("Adding new expirable: " + expirable); |
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} |
109 | 0 | monitors.put(expirable, new ExpirableHolder(timeUnit.toNanos(value), expirable)); |
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} |
111 | 0 | } |
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public boolean isRegistered(Expirable expirable) |
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{ |
115 | 0 | return (monitors.get(expirable) != null); |
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} |
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public void removeExpirable(Expirable expirable) |
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{ |
120 | 0 | if (logger.isDebugEnabled()) |
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{ |
122 | 0 | logger.debug("Removing expirable: " + expirable); |
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} |
124 | 0 | monitors.remove(expirable); |
125 | 0 | } |
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public void resetExpirable(Expirable expirable) |
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{ |
129 | 0 | ExpirableHolder eh = (ExpirableHolder) monitors.get(expirable); |
130 | 0 | if (eh != null) |
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{ |
132 | 0 | eh.reset(); |
133 | 0 | if (logger.isDebugEnabled()) |
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{ |
135 | 0 | logger.debug("Reset expirable: " + expirable); |
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} |
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} |
138 | 0 | } |
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public void run() |
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{ |
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ExpirableHolder holder; |
146 | 0 | for (Iterator iterator = monitors.values().iterator(); iterator.hasNext();) |
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{ |
148 | 0 | holder = (ExpirableHolder) iterator.next(); |
149 | 0 | if (holder.isExpired()) |
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{ |
151 | 0 | removeExpirable(holder.getExpirable()); |
152 | 0 | holder.getExpirable().expired(); |
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} |
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} |
155 | 0 | } |
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public void dispose() |
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{ |
159 | 0 | logger.info("disposing monitor"); |
160 | 0 | scheduler.shutdown(); |
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ExpirableHolder holder; |
162 | 0 | for (Iterator iterator = monitors.values().iterator(); iterator.hasNext();) |
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{ |
164 | 0 | holder = (ExpirableHolder) iterator.next(); |
165 | 0 | removeExpirable(holder.getExpirable()); |
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try |
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{ |
168 | 0 | holder.getExpirable().expired(); |
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} |
170 | 0 | catch (Exception e) |
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{ |
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|
173 | 0 | logger.debug(e.getMessage()); |
174 | 0 | } |
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} |
176 | 0 | } |
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private static class ExpirableHolder |
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{ |
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private long nanoseconds; |
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private Expirable expirable; |
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private long created; |
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public ExpirableHolder(long nanoseconds, Expirable expirable) |
186 | 0 | { |
187 | 0 | this.nanoseconds = nanoseconds; |
188 | 0 | this.expirable = expirable; |
189 | 0 | created = System.nanoTime(); |
190 | 0 | } |
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public long getNanoSeconds() |
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{ |
194 | 0 | return nanoseconds; |
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} |
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public Expirable getExpirable() |
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{ |
199 | 0 | return expirable; |
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} |
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public boolean isExpired() |
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{ |
204 | 0 | return (System.nanoTime() - nanoseconds) > created; |
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} |
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public void reset() |
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{ |
209 | 0 | created = System.nanoTime(); |
210 | 0 | } |
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} |
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} |