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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 edu.emory.mathcs.backport.java.util.concurrent.helpers.Utils; |
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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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37 | 2 | 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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public ExpiryMonitor(String name) |
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{ |
49 | 0 | this(name, 1000); |
50 | 0 | } |
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public ExpiryMonitor(String name, int monitorFrequency) |
53 | 8 | { |
54 | 8 | this.name = name; |
55 | 8 | this.monitorFrequency = monitorFrequency; |
56 | 8 | init(); |
57 | 8 | } |
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public ExpiryMonitor(String name, int monitorFrequency, ScheduledThreadPoolExecutor scheduler) |
60 | 0 | { |
61 | 0 | this.name = name; |
62 | 0 | this.monitorFrequency = monitorFrequency; |
63 | 0 | this.scheduler = scheduler; |
64 | 0 | init(); |
65 | 0 | } |
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protected void init() |
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{ |
69 | 8 | if (monitorFrequency <= 0) |
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{ |
71 | 0 | throw new IllegalArgumentException(CoreMessages.propertyHasInvalidValue("monitorFrequency", |
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new Integer(monitorFrequency)).toString()); |
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} |
74 | 8 | monitors = new ConcurrentHashMap(); |
75 | 8 | if (scheduler == null) |
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{ |
77 | 8 | this.scheduler = new ScheduledThreadPoolExecutor(1); |
78 | 8 | scheduler.setThreadFactory(new DaemonThreadFactory(name + "-Monitor")); |
79 | 8 | scheduler.scheduleWithFixedDelay(this, 0, monitorFrequency, |
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TimeUnit.MILLISECONDS); |
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} |
82 | 8 | } |
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public void addExpirable(long value, TimeUnit timeUnit, Expirable expirable) |
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{ |
94 | 8 | if (isRegistered(expirable)) |
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{ |
96 | 0 | resetExpirable(expirable); |
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} |
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else |
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{ |
100 | 8 | if (logger.isDebugEnabled()) |
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{ |
102 | 0 | logger.debug("Adding new expirable: " + expirable); |
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} |
104 | 8 | monitors.put(expirable, new ExpirableHolder(timeUnit.toNanos(value), expirable)); |
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} |
106 | 8 | } |
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public boolean isRegistered(Expirable expirable) |
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{ |
110 | 16 | return (monitors.get(expirable) != null); |
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} |
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public void removeExpirable(Expirable expirable) |
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{ |
115 | 8 | if (logger.isDebugEnabled()) |
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{ |
117 | 0 | logger.debug("Removing expirable: " + expirable); |
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} |
119 | 8 | monitors.remove(expirable); |
120 | 8 | } |
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public void resetExpirable(Expirable expirable) |
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{ |
124 | 2 | ExpirableHolder eh = (ExpirableHolder) monitors.get(expirable); |
125 | 2 | if (eh != null) |
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{ |
127 | 2 | eh.reset(); |
128 | 2 | if (logger.isDebugEnabled()) |
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{ |
130 | 0 | logger.debug("Reset expirable: " + expirable); |
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} |
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} |
133 | 2 | } |
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public void run() |
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{ |
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ExpirableHolder holder; |
141 | 3681 | for (Iterator iterator = monitors.values().iterator(); iterator.hasNext();) |
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{ |
143 | 49 | holder = (ExpirableHolder) iterator.next(); |
144 | 49 | if (holder.isExpired()) |
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{ |
146 | 6 | removeExpirable(holder.getExpirable()); |
147 | 6 | holder.getExpirable().expired(); |
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} |
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} |
150 | 3681 | } |
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public void dispose() |
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{ |
154 | 0 | logger.info("disposing monitor"); |
155 | 0 | scheduler.shutdown(); |
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ExpirableHolder holder; |
157 | 0 | for (Iterator iterator = monitors.values().iterator(); iterator.hasNext();) |
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{ |
159 | 0 | holder = (ExpirableHolder) iterator.next(); |
160 | 0 | removeExpirable(holder.getExpirable()); |
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try |
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{ |
163 | 0 | holder.getExpirable().expired(); |
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} |
165 | 0 | catch (Exception e) |
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{ |
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|
168 | 0 | logger.debug(e.getMessage()); |
169 | 0 | } |
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} |
171 | 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) |
181 | 8 | { |
182 | 8 | this.nanoseconds = nanoseconds; |
183 | 8 | this.expirable = expirable; |
184 | 8 | created = Utils.nanoTime(); |
185 | 8 | } |
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public long getNanoSeconds() |
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{ |
189 | 0 | return nanoseconds; |
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} |
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public Expirable getExpirable() |
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{ |
194 | 12 | return expirable; |
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} |
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public boolean isExpired() |
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{ |
199 | 49 | return (Utils.nanoTime() - nanoseconds) > created; |
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} |
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public void reset() |
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{ |
204 | 2 | created = Utils.nanoTime(); |
205 | 2 | } |
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} |
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} |