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1 package fschmidt.util.executor;
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2
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3 import java.util.Queue;
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4 import java.util.LinkedList;
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5 import java.util.concurrent.Executor;
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6 import java.util.concurrent.TimeUnit;
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7 import java.util.concurrent.atomic.AtomicInteger;
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8 import org.slf4j.Logger;
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9 import org.slf4j.LoggerFactory;
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10
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11
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12 public final class ThreadPool extends AbstractThreadPool implements Executor {
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13 private static final Logger logger = LoggerFactory.getLogger(ThreadPool.class);
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14
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15 private final Queue<Runnable> queue = new LinkedList<Runnable>();
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16
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17 public ThreadPool(int size) {
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18 super(size);
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19 start();
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20 }
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21
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22 @Override public final void execute(Runnable command) {
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23 dispatch(command);
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24 }
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25
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26 public final synchronized boolean dispatch(Runnable command) {
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27 if( !isRunning() )
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28 return false;
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29 queue.add(wrap(command));
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30 notify();
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31 return true;
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32 }
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33
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34 @Override synchronized Runnable getCommand() {
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35 Runnable command;
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36 while( (command = queue.poll()) == null ) {
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37 if( !isRunning() )
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38 return null;
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39 try {
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40 wait();
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41 } catch(InterruptedException e) {
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42 logger.error("",e);
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43 }
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44 }
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45 return command;
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46 }
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47
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48 @Override public final synchronized int getQueueSize() {
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49 return queue.size();
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50 }
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51
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52 }
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