[100] | 1 | package omq.server; |
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| 2 | |
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| 3 | import java.io.IOException; |
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| 4 | import java.util.ArrayList; |
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| 5 | import java.util.List; |
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[102] | 6 | import java.util.ListIterator; |
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[100] | 7 | import java.util.concurrent.atomic.AtomicInteger; |
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| 8 | |
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[101] | 9 | import org.apache.log4j.Logger; |
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| 10 | |
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[100] | 11 | import omq.common.broker.Broker; |
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| 12 | |
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| 13 | import com.rabbitmq.client.AMQP.Queue.DeclareOk; |
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| 14 | import com.rabbitmq.client.Channel; |
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| 15 | |
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[101] | 16 | /** |
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| 17 | * |
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| 18 | * @author Sergi Toda <sergi.toda@estudiants.urv.cat> |
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| 19 | * |
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| 20 | */ |
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| 21 | |
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[100] | 22 | public class RemoteThreadPool extends Thread { |
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[101] | 23 | private static final Logger logger = Logger.getLogger(RemoteThreadPool.class.getName()); |
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[100] | 24 | private List<InvocationThread> workers; |
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[108] | 25 | private MultiInvocationThread multiWorker; |
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[100] | 26 | private AtomicInteger busy; |
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| 27 | private int minPoolThreads; |
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| 28 | private int maxPoolThreads; |
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| 29 | private long refresh; |
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| 30 | private long keepAliveTime; |
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| 31 | private int maxMessagesPerThread; |
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| 32 | |
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| 33 | private RemoteObject obj; |
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| 34 | private Broker broker; |
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| 35 | private boolean killed = false; |
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| 36 | |
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[108] | 37 | public RemoteThreadPool(int minPoolThreads, int maxPoolThreads, long refresh, long keepAliveTime, int maxMessagesPerThread, |
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| 38 | RemoteObject obj, Broker broker) { |
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[100] | 39 | this.minPoolThreads = minPoolThreads; |
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| 40 | this.maxPoolThreads = maxPoolThreads; |
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| 41 | this.refresh = refresh; |
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| 42 | this.keepAliveTime = keepAliveTime; |
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| 43 | this.maxMessagesPerThread = maxMessagesPerThread; |
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| 44 | this.obj = obj; |
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| 45 | this.broker = broker; |
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| 46 | |
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| 47 | workers = new ArrayList<InvocationThread>(minPoolThreads); |
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| 48 | busy = new AtomicInteger(); |
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| 49 | } |
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| 50 | |
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| 51 | @Override |
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| 52 | public void run() { |
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| 53 | |
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[101] | 54 | /* |
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| 55 | * Create and start minPoolThreads |
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| 56 | */ |
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[108] | 57 | logger.info("ObjectMQ reference: " + obj.getRef() + ", creating: " + minPoolThreads + ", maxPoolThreads: " + maxPoolThreads |
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| 58 | + ", refresh time: " + refresh + ", keepAlive: " + keepAliveTime + ", maxMessagesPerThread: " + maxMessagesPerThread); |
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[100] | 59 | |
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[108] | 60 | try { |
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| 61 | multiWorker = new MultiInvocationThread(obj); |
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| 62 | multiWorker.start(); |
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| 63 | } catch (Exception e1) { |
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| 64 | // TODO Auto-generated catch block |
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| 65 | e1.printStackTrace(); |
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| 66 | } |
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| 67 | |
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[101] | 68 | for (int i = 0; i < minPoolThreads; i++) { |
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| 69 | try { |
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| 70 | InvocationThread iThread = new InvocationThread(obj); |
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| 71 | workers.add(iThread); |
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| 72 | iThread.start(); |
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| 73 | } catch (Exception e) { |
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| 74 | logger.error("Error while creating pool threads", e); |
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| 75 | e.printStackTrace(); |
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| 76 | } |
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| 77 | } |
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| 78 | |
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[100] | 79 | while (!killed) { |
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| 80 | |
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| 81 | try { |
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| 82 | Channel channel = broker.getChannel(); |
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| 83 | DeclareOk dok = channel.queueDeclarePassive(obj.getRef()); |
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| 84 | |
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| 85 | int numConsumers = dok.getConsumerCount(); |
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| 86 | int numMessages = dok.getMessageCount(); |
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| 87 | int division = numMessages / numConsumers; |
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| 88 | int numWorkers = workers.size(); |
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| 89 | |
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| 90 | if (numWorkers < maxPoolThreads && division >= maxMessagesPerThread) { |
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| 91 | // Create a new thread |
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[101] | 92 | System.out.println("Add worker"); |
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| 93 | InvocationThread worker = new InvocationThread(obj); |
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[100] | 94 | workers.add(worker); |
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| 95 | worker.start(); |
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| 96 | } else if (numWorkers > minPoolThreads && busy.get() < numWorkers) { |
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| 97 | // Kill idle threads |
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[108] | 98 | System.out.println("Kill lazy workers, numWorkers = " + numWorkers + ", minPool = " + minPoolThreads + ", busy = " |
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| 99 | + busy.get()); |
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[100] | 100 | stopIdleThreads(); |
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| 101 | } |
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| 102 | |
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| 103 | Thread.sleep(refresh); |
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| 104 | |
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| 105 | } catch (Exception e) { |
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[101] | 106 | e.printStackTrace(); |
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| 107 | logger.error(e); |
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[100] | 108 | } |
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| 109 | } |
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| 110 | |
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| 111 | } |
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| 112 | |
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| 113 | private void stopIdleThreads() { |
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| 114 | long now = System.currentTimeMillis(); |
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| 115 | |
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[102] | 116 | ListIterator<InvocationThread> lIter = workers.listIterator(); |
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| 117 | while (workers.size() > minPoolThreads && lIter.hasNext()) { |
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| 118 | InvocationThread worker = lIter.next(); |
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[100] | 119 | long lastExec = worker.getLastExecution(); |
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[101] | 120 | System.out.println("last - now = " + (now - lastExec) + " keep alive = " + keepAliveTime); |
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| 121 | if (worker.isIdle() && (now - lastExec) > keepAliveTime) { |
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[100] | 122 | // Kill thread |
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| 123 | try { |
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| 124 | worker.kill(); |
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[102] | 125 | lIter.remove(); |
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[100] | 126 | } catch (IOException e) { |
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[102] | 127 | logger.error(e); |
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[100] | 128 | } |
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| 129 | |
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| 130 | } |
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| 131 | } |
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| 132 | } |
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| 133 | |
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[101] | 134 | public void kill() throws IOException { |
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| 135 | killed = true; |
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| 136 | for (InvocationThread iThread : workers) { |
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| 137 | iThread.kill(); |
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| 138 | } |
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| 139 | interrupt(); |
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| 140 | } |
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| 141 | |
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[100] | 142 | public List<InvocationThread> getWorkers() { |
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| 143 | return workers; |
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| 144 | } |
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| 145 | |
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| 146 | public void setWorkers(List<InvocationThread> workers) { |
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| 147 | this.workers = workers; |
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| 148 | } |
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| 149 | |
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| 150 | public AtomicInteger getBusy() { |
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| 151 | return busy; |
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| 152 | } |
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| 153 | |
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| 154 | public void setBusy(AtomicInteger busy) { |
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| 155 | this.busy = busy; |
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| 156 | } |
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| 157 | |
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| 158 | public int getMinPoolThreads() { |
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| 159 | return minPoolThreads; |
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| 160 | } |
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| 161 | |
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| 162 | public void setMinPoolThreads(int minPoolThreads) { |
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| 163 | this.minPoolThreads = minPoolThreads; |
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| 164 | } |
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| 165 | |
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| 166 | public int getMaxPoolThreads() { |
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| 167 | return maxPoolThreads; |
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| 168 | } |
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| 169 | |
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| 170 | public void setMaxPoolThreads(int maxPoolThreads) { |
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| 171 | this.maxPoolThreads = maxPoolThreads; |
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| 172 | } |
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| 173 | |
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| 174 | public long getRefresh() { |
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| 175 | return refresh; |
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| 176 | } |
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| 177 | |
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| 178 | public void setRefresh(long refresh) { |
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| 179 | this.refresh = refresh; |
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| 180 | } |
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| 181 | |
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| 182 | public long getKeepAliveTime() { |
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| 183 | return keepAliveTime; |
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| 184 | } |
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| 185 | |
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| 186 | public void setKeepAliveTime(long keepAliveTime) { |
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| 187 | this.keepAliveTime = keepAliveTime; |
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| 188 | } |
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| 189 | |
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| 190 | public int getMaxMessagesPerThread() { |
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| 191 | return maxMessagesPerThread; |
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| 192 | } |
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| 193 | |
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| 194 | public void setMaxMessagesPerThread(int maxMessagesPerThread) { |
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| 195 | this.maxMessagesPerThread = maxMessagesPerThread; |
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| 196 | } |
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| 197 | |
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| 198 | } |
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