Generate channel IDs in a pseudorandom fashion
Requested by @psweeny in #547 Signed-off-by: Cruz Julian Bishop <cruzjbishop@gmail.com>
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@ -24,6 +24,7 @@ import io.netty.util.DefaultAttributeMap;
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import java.io.IOException;
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import java.net.SocketAddress;
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import java.nio.channels.ClosedChannelException;
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import java.util.Random;
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import java.util.concurrent.ConcurrentHashMap;
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import java.util.concurrent.ConcurrentMap;
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@ -36,13 +37,19 @@ public abstract class AbstractChannel extends DefaultAttributeMap implements Cha
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static final ConcurrentMap<Integer, Channel> allChannels = new ConcurrentHashMap<Integer, Channel>();
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private static final Random random = new Random();
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public static Random getRandom() {
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return random;
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}
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/**
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* Generates a negative unique integer ID. This method generates only
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* negative integers to avoid conflicts with user-specified IDs where only
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* non-negative integers are allowed.
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*/
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private static Integer allocateId(Channel channel) {
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int idVal = System.identityHashCode(channel);
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int idVal = random.nextInt();
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if (idVal > 0) {
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idVal = -idVal;
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} else if (idVal == 0) {
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