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| package org.jboss.cache; |
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| import org.apache.commons.logging.Log; |
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| import org.apache.commons.logging.LogFactory; |
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| import org.jboss.cache.marshall.MethodCall; |
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| import org.jboss.cache.marshall.MethodDeclarations; |
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| import java.util.ArrayList; |
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| import java.util.LinkedList; |
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| import java.util.List; |
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| import java.util.Timer; |
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| import java.util.TimerTask; |
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| public class ReplicationQueue |
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| { |
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| private static Log log = LogFactory.getLog(ReplicationQueue.class); |
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| private CacheImpl cache = null; |
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| private long interval = 5000; |
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| private long max_elements = 500; |
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| private final List<MethodCall> elements = new LinkedList<MethodCall>(); |
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| private Timer timer = null; |
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| private MyTask task = null; |
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| public ReplicationQueue()
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| { |
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| } |
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| public ReplicationQueue(CacheImpl cache, long interval, long max_elements)
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| { |
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| this.cache = cache;
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| this.interval = interval;
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| this.max_elements = max_elements;
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| } |
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| public long getInterval()
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| { |
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| return interval;
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| } |
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| public void setInterval(long interval)
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| { |
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| this.interval = interval;
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| stop();
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| start();
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| } |
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| public long getMax_elements()
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| { |
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| return max_elements;
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| } |
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| public void setMax_elements(long max_elements)
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| { |
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| this.max_elements = max_elements;
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| } |
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| public synchronized void start()
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| { |
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| if (interval > 0)
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| { |
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| if (task == null)
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| task = new MyTask();
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| if (timer == null)
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| { |
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| timer = new Timer(true);
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| timer.schedule(task,
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| 500, |
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| interval); |
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| } |
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| } |
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| } |
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| public synchronized void stop()
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| { |
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| if (task != null)
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| { |
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| task.cancel();
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| task = null;
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| } |
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| if (timer != null)
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| { |
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| timer.cancel();
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| timer = null;
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| } |
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| } |
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| public void add(MethodCall job)
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| if (job == null)
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| throw new NullPointerException("job is null");
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| synchronized (elements)
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| { |
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| elements.add(job);
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| if (elements.size() >= max_elements)
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| flush();
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| } |
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| } |
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| public void flush()
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| { |
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| List<MethodCall> l;
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| synchronized (elements)
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| if (log.isTraceEnabled())
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| log.trace("flush(): flushing repl queue (num elements=" + elements.size() + ")");
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| l = new ArrayList<MethodCall>(elements);
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| elements.clear();
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| } |
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| if (l.size() > 0)
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| try
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| cache.getRPCManager().callRemoteMethods(null, MethodDeclarations.replicateAllMethod, new Object[]{l}, false, true, 5000);
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| } |
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| catch (Throwable t) |
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| { |
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| log.error("failed replicating " + l.size() + " elements in replication queue", t);
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| } |
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| } |
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| } |
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| class MyTask extends TimerTask |
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| { |
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| public void run()
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| flush();
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| } |
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| } |
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| } |