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20 package org.apache.mina.proxy;
21
22 import java.util.LinkedList;
23 import java.util.Queue;
24
25 import org.apache.mina.core.buffer.IoBuffer;
26 import org.apache.mina.core.filterchain.IoFilter.NextFilter;
27 import org.apache.mina.core.future.DefaultWriteFuture;
28 import org.apache.mina.core.future.WriteFuture;
29 import org.apache.mina.core.session.IoSession;
30 import org.apache.mina.core.write.DefaultWriteRequest;
31 import org.apache.mina.core.write.WriteRequest;
32 import org.apache.mina.proxy.filter.ProxyFilter;
33 import org.apache.mina.proxy.filter.ProxyHandshakeIoBuffer;
34 import org.apache.mina.proxy.session.ProxyIoSession;
35 import org.slf4j.Logger;
36 import org.slf4j.LoggerFactory;
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45
46
47 public abstract class AbstractProxyLogicHandler implements ProxyLogicHandler {
48
49 private final static Logger LOGGER = LoggerFactory
50 .getLogger(AbstractProxyLogicHandler.class);
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52
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54
55 private ProxyIoSession proxyIoSession;
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60 private Queue<Event> writeRequestQueue = null;
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65 private boolean handshakeComplete = false;
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71
72 public AbstractProxyLogicHandler(ProxyIoSession proxyIoSession) {
73 this.proxyIoSession = proxyIoSession;
74 }
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77
78
79 protected ProxyFilter getProxyFilter() {
80 return proxyIoSession.getProxyFilter();
81 }
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84
85
86 protected IoSession getSession() {
87 return proxyIoSession.getSession();
88 }
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91
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93 public ProxyIoSession getProxyIoSession() {
94 return proxyIoSession;
95 }
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103 protected WriteFuture writeData(final NextFilter nextFilter,
104 final IoBuffer data) {
105
106 ProxyHandshakeIoBuffer writeBuffer = new ProxyHandshakeIoBuffer(data);
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108 LOGGER.debug(" session write: {}", writeBuffer);
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110 WriteFuture writeFuture = new DefaultWriteFuture(getSession());
111 getProxyFilter().writeData(nextFilter, getSession(),
112 new DefaultWriteRequest(writeBuffer, writeFuture), true);
113
114 return writeFuture;
115 }
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120
121 public boolean isHandshakeComplete() {
122 synchronized (this) {
123 return handshakeComplete;
124 }
125 }
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129
130 protected final void setHandshakeComplete() {
131 synchronized (this) {
132 handshakeComplete = true;
133 }
134
135 ProxyIoSession proxyIoSession = getProxyIoSession();
136 proxyIoSession.getConnector()
137 .fireConnected(proxyIoSession.getSession())
138 .awaitUninterruptibly();
139
140 LOGGER.debug(" handshake completed");
141
142
143 try {
144 proxyIoSession.getEventQueue().flushPendingSessionEvents();
145 flushPendingWriteRequests();
146 } catch (Exception ex) {
147 LOGGER.error("Unable to flush pending write requests", ex);
148 }
149 }
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154 protected synchronized void flushPendingWriteRequests() throws Exception {
155 LOGGER.debug(" flushPendingWriteRequests()");
156
157 if (writeRequestQueue == null) {
158 return;
159 }
160
161 Event scheduledWrite;
162 while ((scheduledWrite = writeRequestQueue.poll()) != null) {
163 LOGGER.debug(" Flushing buffered write request: {}",
164 scheduledWrite.data);
165
166 getProxyFilter().filterWrite(scheduledWrite.nextFilter,
167 getSession(), (WriteRequest) scheduledWrite.data);
168 }
169
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171 writeRequestQueue = null;
172 }
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177 public synchronized void enqueueWriteRequest(final NextFilter nextFilter,
178 final WriteRequest writeRequest) {
179 if (writeRequestQueue == null) {
180 writeRequestQueue = new LinkedList<Event>();
181 }
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183 writeRequestQueue.offer(new Event(nextFilter, writeRequest));
184 }
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192 protected void closeSession(final String message, final Throwable t) {
193 if (t != null) {
194 LOGGER.error(message, t);
195 proxyIoSession.setAuthenticationFailed(true);
196 } else {
197 LOGGER.error(message);
198 }
199
200 getSession().close(true);
201 }
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208 protected void closeSession(final String message) {
209 closeSession(message, null);
210 }
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215 private final static class Event {
216 private final NextFilter nextFilter;
217
218 private final Object data;
219
220 Event(final NextFilter nextFilter, final Object data) {
221 this.nextFilter = nextFilter;
222 this.data = data;
223 }
224
225 public Object getData() {
226 return data;
227 }
228
229 public NextFilter getNextFilter() {
230 return nextFilter;
231 }
232 }
233 }