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20 package org.apache.mina.transport.vmpipe;
21
22 import java.io.IOException;
23 import java.net.SocketAddress;
24 import java.util.HashSet;
25 import java.util.Set;
26 import java.util.concurrent.Executor;
27
28 import org.apache.mina.core.filterchain.IoFilterChain;
29 import org.apache.mina.core.future.ConnectFuture;
30 import org.apache.mina.core.future.DefaultConnectFuture;
31 import org.apache.mina.core.future.IoFuture;
32 import org.apache.mina.core.future.IoFutureListener;
33 import org.apache.mina.core.service.AbstractIoConnector;
34 import org.apache.mina.core.service.IoHandler;
35 import org.apache.mina.core.service.TransportMetadata;
36 import org.apache.mina.core.session.IdleStatusChecker;
37 import org.apache.mina.core.session.IoSessionInitializer;
38 import org.apache.mina.util.ExceptionMonitor;
39
40
41
42
43
44
45
46 public final class VmPipeConnector extends AbstractIoConnector {
47
48
49 private IdleStatusChecker idleChecker;
50
51
52
53
54 public VmPipeConnector() {
55 this(null);
56 }
57
58
59
60
61 public VmPipeConnector(Executor executor) {
62 super(new DefaultVmPipeSessionConfig(), executor);
63 idleChecker = new IdleStatusChecker();
64
65
66 executeWorker(idleChecker.getNotifyingTask(), "idleStatusChecker");
67 }
68
69 public TransportMetadata getTransportMetadata() {
70 return VmPipeSession.METADATA;
71 }
72
73
74
75
76 public VmPipeSessionConfig getSessionConfig() {
77 return (VmPipeSessionConfig) sessionConfig;
78 }
79
80 @Override
81 protected ConnectFuture connect0(SocketAddress remoteAddress, SocketAddress localAddress,
82 IoSessionInitializer<? extends ConnectFuture> sessionInitializer) {
83 VmPipe entry = VmPipeAcceptor.boundHandlers.get(remoteAddress);
84 if (entry == null) {
85 return DefaultConnectFuture.newFailedFuture(new IOException("Endpoint unavailable: " + remoteAddress));
86 }
87
88 DefaultConnectFuture future = new DefaultConnectFuture();
89
90
91 VmPipeAddress actualLocalAddress;
92 try {
93 actualLocalAddress = nextLocalAddress();
94 } catch (IOException e) {
95 return DefaultConnectFuture.newFailedFuture(e);
96 }
97
98 VmPipeSession localSession = new VmPipeSession(this, getListeners(), actualLocalAddress, getHandler(), entry);
99
100 initSession(localSession, future, sessionInitializer);
101
102
103 localSession.getCloseFuture().addListener(LOCAL_ADDRESS_RECLAIMER);
104
105
106 try {
107 IoFilterChain filterChain = localSession.getFilterChain();
108 this.getFilterChainBuilder().buildFilterChain(filterChain);
109
110
111 getListeners().fireSessionCreated(localSession);
112 idleChecker.addSession(localSession);
113 } catch (Exception e) {
114 future.setException(e);
115 return future;
116 }
117
118
119 VmPipeSession remoteSession = localSession.getRemoteSession();
120 ((VmPipeAcceptor) remoteSession.getService()).doFinishSessionInitialization(remoteSession, null);
121 try {
122 IoFilterChain filterChain = remoteSession.getFilterChain();
123 entry.getAcceptor().getFilterChainBuilder().buildFilterChain(filterChain);
124
125
126 entry.getListeners().fireSessionCreated(remoteSession);
127 idleChecker.addSession(remoteSession);
128 } catch (Exception e) {
129 ExceptionMonitor.getInstance().exceptionCaught(e);
130 remoteSession.close(true);
131 }
132
133
134
135 ((VmPipeFilterChain) localSession.getFilterChain()).start();
136 ((VmPipeFilterChain) remoteSession.getFilterChain()).start();
137
138 return future;
139 }
140
141 @Override
142 protected void dispose0() throws Exception {
143
144 idleChecker.getNotifyingTask().cancel();
145 }
146
147 private static final Set<VmPipeAddress> TAKEN_LOCAL_ADDRESSES = new HashSet<VmPipeAddress>();
148
149 private static int nextLocalPort = -1;
150
151 private static final IoFutureListener<IoFuture> LOCAL_ADDRESS_RECLAIMER = new LocalAddressReclaimer();
152
153 private static VmPipeAddress nextLocalAddress() throws IOException {
154 synchronized (TAKEN_LOCAL_ADDRESSES) {
155 if (nextLocalPort >= 0) {
156 nextLocalPort = -1;
157 }
158 for (int i = 0; i < Integer.MAX_VALUE; i++) {
159 VmPipeAddress answer = new VmPipeAddress(nextLocalPort--);
160 if (!TAKEN_LOCAL_ADDRESSES.contains(answer)) {
161 TAKEN_LOCAL_ADDRESSES.add(answer);
162 return answer;
163 }
164 }
165 }
166
167 throw new IOException("Can't assign a local VM pipe port.");
168 }
169
170 private static class LocalAddressReclaimer implements IoFutureListener<IoFuture> {
171 public void operationComplete(IoFuture future) {
172 synchronized (TAKEN_LOCAL_ADDRESSES) {
173 TAKEN_LOCAL_ADDRESSES.remove(future.getSession().getLocalAddress());
174 }
175 }
176 }
177 }