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20 package org.apache.mina.service.executor;
21
22 import java.util.concurrent.BlockingQueue;
23 import java.util.concurrent.LinkedBlockingQueue;
24
25 import org.apache.mina.api.IoHandler;
26 import org.slf4j.Logger;
27 import org.slf4j.LoggerFactory;
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34
35 public final class OrderedHandlerExecutor implements IoHandlerExecutor {
36
37 private static final Logger LOG = LoggerFactory.getLogger(OrderedHandlerExecutor.class);
38
39 private Worker[] workers;
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46
47 public OrderedHandlerExecutor(int workerThreadCount, int queueSize) {
48 LOG.debug("creating OrderedHandlerExecutor workerThreadCount = {} queueSize = {}", workerThreadCount, queueSize);
49 workers = new Worker[workerThreadCount];
50
51 for (int i = 0; i < workerThreadCount; i++) {
52 workers[i] = new Worker(i, queueSize);
53 }
54 for (int i = 0; i < workerThreadCount; i++) {
55 workers[i].start();
56 }
57 LOG.debug("workers started");
58 }
59
60
61
62
63 @Override
64 public void execute(Event event) {
65 try {
66 int workerIndex = (int) (event.getSession().getId() % workers.length);
67 LOG.debug("executing event {} in worker {}", event, workerIndex);
68 workers[workerIndex].enqueue(event);
69 } catch (InterruptedException e) {
70
71 return;
72 }
73 }
74
75
76 private static class Worker extends Thread {
77
78 private static HandlerCaller caller = new HandlerCaller();
79
80 private final BlockingQueue<Event> queue;
81
82 public Worker(int index, int queueSize) {
83 super("IoHandlerWorker " + index);
84 queue = new LinkedBlockingQueue<Event>(queueSize);
85 }
86
87 public void enqueue(Event event) throws InterruptedException {
88 LOG.debug("enqueing event : {}", event);
89 queue.put(event);
90 }
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94
95 @Override
96 public void run() {
97 for (;;) {
98 try {
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100 Event e = queue.take();
101 LOG.debug("dequeing event {}", e);
102 e.visit(caller);
103
104 } catch (InterruptedException e) {
105
106 return;
107 }
108 }
109 }
110 }
111 }