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20 package org.apache.mina.transport.socket.nio.support;
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22 import java.util.Queue;
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24 import org.apache.mina.common.ByteBuffer;
25 import org.apache.mina.common.IoFilter.WriteRequest;
26 import org.apache.mina.common.IoFilterChain;
27 import org.apache.mina.common.IoSession;
28 import org.apache.mina.common.support.AbstractIoFilterChain;
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35 class DatagramFilterChain extends AbstractIoFilterChain {
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37 DatagramFilterChain(IoSession parent) {
38 super(parent);
39 }
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41 @Override
42 protected void doWrite(IoSession session, WriteRequest writeRequest) {
43 DatagramSessionImpl s = (DatagramSessionImpl) session;
44 Queue<WriteRequest> writeRequestQueue = s.getWriteRequestQueue();
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48 ((ByteBuffer) writeRequest.getMessage()).mark();
49 synchronized (writeRequestQueue) {
50 writeRequestQueue.add(writeRequest);
51 if (writeRequestQueue.size() == 1
52 && session.getTrafficMask().isWritable()) {
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54 s.getManagerDelegate().flushSession(s);
55 }
56 }
57 }
58
59 @Override
60 protected void doClose(IoSession session) {
61 DatagramSessionImpl s = (DatagramSessionImpl) session;
62 DatagramService manager = s.getManagerDelegate();
63 if (manager instanceof DatagramConnectorDelegate) {
64 manager.closeSession(s);
65 } else {
66 ((DatagramAcceptorDelegate) manager).getListeners()
67 .fireSessionDestroyed(session);
68 session.getCloseFuture().setClosed();
69 }
70 }
71 }