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20 package org.apache.mina.handler.stream;
21
22 import java.io.IOException;
23 import java.io.InputStream;
24 import java.io.OutputStream;
25 import java.net.SocketTimeoutException;
26
27 import org.apache.mina.core.buffer.IoBuffer;
28 import org.apache.mina.core.service.IoHandler;
29 import org.apache.mina.core.service.IoHandlerAdapter;
30 import org.apache.mina.core.session.AttributeKey;
31 import org.apache.mina.core.session.IdleStatus;
32 import org.apache.mina.core.session.IoSession;
33 import org.slf4j.Logger;
34 import org.slf4j.LoggerFactory;
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45
46 public abstract class StreamIoHandler extends IoHandlerAdapter {
47 private final static Logger LOGGER = LoggerFactory.getLogger(StreamIoHandler.class);
48
49 private static final AttributeKey KEY_IN = new AttributeKey(StreamIoHandler.class, "in");
50
51 private static final AttributeKey KEY_OUT = new AttributeKey(StreamIoHandler.class, "out");
52
53 private int readTimeout;
54
55 private int writeTimeout;
56
57 protected StreamIoHandler() {
58
59 }
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66 protected abstract void processStreamIo(IoSession session, InputStream in, OutputStream out);
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72 public int getReadTimeout() {
73 return readTimeout;
74 }
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80 public void setReadTimeout(int readTimeout) {
81 this.readTimeout = readTimeout;
82 }
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88 public int getWriteTimeout() {
89 return writeTimeout;
90 }
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96 public void setWriteTimeout(int writeTimeout) {
97 this.writeTimeout = writeTimeout;
98 }
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103 @Override
104 public void sessionOpened(IoSession session) {
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106 session.getConfig().setWriteTimeout(writeTimeout);
107 session.getConfig().setIdleTime(IdleStatus.READER_IDLE, readTimeout);
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110 InputStream in = new IoSessionInputStream();
111 OutputStream out = new IoSessionOutputStream(session);
112 session.setAttribute(KEY_IN, in);
113 session.setAttribute(KEY_OUT, out);
114 processStreamIo(session, in, out);
115 }
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119
120 @Override
121 public void sessionClosed(IoSession session) throws Exception {
122 final InputStream in = (InputStream) session.getAttribute(KEY_IN);
123 final OutputStream out = (OutputStream) session.getAttribute(KEY_OUT);
124 try {
125 in.close();
126 } finally {
127 out.close();
128 }
129 }
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134 @Override
135 public void messageReceived(IoSession session, Object buf) {
136 final IoSessionInputStream in = (IoSessionInputStream) session.getAttribute(KEY_IN);
137 in.write((IoBuffer) buf);
138 }
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143 @Override
144 public void exceptionCaught(IoSession session, Throwable cause) {
145 final IoSessionInputStream in = (IoSessionInputStream) session.getAttribute(KEY_IN);
146
147 IOException e = null;
148 if (cause instanceof StreamIoException) {
149 e = (IOException) cause.getCause();
150 } else if (cause instanceof IOException) {
151 e = (IOException) cause;
152 }
153
154 if (e != null && in != null) {
155 in.throwException(e);
156 } else {
157 LOGGER.warn("Unexpected exception.", cause);
158 session.close(true);
159 }
160 }
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164
165 @Override
166 public void sessionIdle(IoSession session, IdleStatus status) {
167 if (status == IdleStatus.READER_IDLE) {
168 throw new StreamIoException(new SocketTimeoutException("Read timeout"));
169 }
170 }
171
172 private static class StreamIoException extends RuntimeException {
173 private static final long serialVersionUID = 3976736960742503222L;
174
175 public StreamIoException(IOException cause) {
176 super(cause);
177 }
178 }
179 }