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package org.activeio.net;
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import java.io.IOException;
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import java.io.InterruptedIOException;
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import org.activeio.AsynchChannel;
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import org.activeio.AsynchChannelListener;
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import org.activeio.Packet;
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import org.activeio.packet.EOSPacket;
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import EDU.oswego.cs.dl.util.concurrent.Semaphore;
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30
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32
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34
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final public class VMPipeAsynchChannelPipe {
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final PipeChannel leftChannel = new PipeChannel();
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final PipeChannel rightChannel = new PipeChannel();
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final public static class PipeChannel implements AsynchChannel {
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private PipeChannel sibiling;
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private AsynchChannelListener channelListener;
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private final Semaphore runMutext = new Semaphore(0);
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private boolean disposed;
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private boolean running;
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32
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public PipeChannel() {
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}
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50
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public void setAsynchChannelListener(AsynchChannelListener channelListener) {
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28
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this.channelListener = channelListener;
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}
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0
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public AsynchChannelListener getAsynchChannelListener() {
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0
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return channelListener;
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}
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4008
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public void write(Packet packet) throws IOException {
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4008
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if( disposed )
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0
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throw new IOException("Conneciton closed.");
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4008
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sibiling.onPacket(packet, WAIT_FOREVER_TIMEOUT);
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}
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63
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4040
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private void onPacket(Packet packet, long timeout) throws IOException {
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4040
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try {
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4040
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if( timeout == NO_WAIT_TIMEOUT ) {
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32
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if( !runMutext.attempt(0) )
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4
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return;
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4008
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} else if( timeout == WAIT_FOREVER_TIMEOUT ) {
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4008
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runMutext.acquire();
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} else {
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0
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if( !runMutext.attempt(timeout) )
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0
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return;
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}
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} catch (InterruptedException e) {
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0
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throw new InterruptedIOException();
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}
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4036
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try {
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4036
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if( disposed ) {
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16
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throw new IOException("Peer connection closed.");
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}
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4020
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channelListener.onPacket(packet);
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} finally {
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4036
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runMutext.release();
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}
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}
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87
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2004
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public void flush() throws IOException {
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88
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}
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89
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90
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24
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public void start() throws IOException {
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91
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24
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if(running)
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0
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return;
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93
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24
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if( channelListener==null )
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0
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throw new IOException("channelListener has not been set.");
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24
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running=true;
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24
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runMutext.release();
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}
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99
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0
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public void stop(long timeout) throws IOException {
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100
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0
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if(!running)
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0
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return;
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102
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0
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try {
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0
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if( timeout == NO_WAIT_TIMEOUT ) {
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0
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if( !runMutext.attempt(0) )
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0
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return;
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0
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} else if( timeout == WAIT_FOREVER_TIMEOUT ) {
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0
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runMutext.acquire();
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108
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} else {
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0
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if( !runMutext.attempt(timeout) )
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0
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return;
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}
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112
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0
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running=false;
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113
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} catch (InterruptedException e) {
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114
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0
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throw new InterruptedIOException();
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115
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}
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116
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}
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117
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118
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36
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public void dispose() {
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119
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36
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if( disposed )
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120
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4
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return;
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121
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122
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32
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if( running && channelListener!=null ) {
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123
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24
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this.channelListener.onPacketError(new IOException("Pipe closed."));
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124
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24
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running=false;
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125
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}
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126
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32
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disposed = true;
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127
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32
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runMutext.release();
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128
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129
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32
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try {
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130
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131
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32
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sibiling.onPacket(EOSPacket.EOS_PACKET, NO_WAIT_TIMEOUT);
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} catch (IOException e) {
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133
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}
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134
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}
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135
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136
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0
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public PipeChannel getSibiling() {
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137
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0
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return sibiling;
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138
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}
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139
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32
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public void setSibiling(PipeChannel sibiling) {
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140
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32
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this.sibiling = sibiling;
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141
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}
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142
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143
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26
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public Object narrow(Class target) {
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144
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26
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if( target.isAssignableFrom(getClass()) ) {
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145
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8
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return this;
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146
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}
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147
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18
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return null;
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148
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}
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149
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150
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0
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public String getId() {
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0
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return "0x"+Integer.toHexString(System.identityHashCode(this));
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152
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}
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153
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154
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0
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public String toString() {
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0
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return "Pipe Channel from "+getId()+" to "+sibiling.getId();
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156
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}
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157
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}
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158
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159
|
16
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public VMPipeAsynchChannelPipe() {
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160
|
16
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leftChannel.setSibiling(rightChannel);
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161
|
16
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rightChannel.setSibiling(leftChannel);
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162
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}
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163
|
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164
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16
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public AsynchChannel getLeftAsynchChannel() {
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165
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16
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return leftChannel;
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166
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}
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167
|
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|
168
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16
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public AsynchChannel getRightAsynchChannel() {
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169
|
16
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return rightChannel;
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170
|
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}
|
171
|
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}
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172
|
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