// $Id: TCP.java,v 1.58 2009/04/09 09:11:15 belaban Exp $
package org.jgroups.protocols;
import org.jgroups.Address;
import org.jgroups.PhysicalAddress;
import org.jgroups.annotations.ManagedAttribute;
import org.jgroups.annotations.ManagedOperation;
import org.jgroups.blocks.TCPConnectionMap;
import java.net.InetAddress;
import java.util.Collection;
/**
* TCP based protocol. Creates a server socket, which gives us the local address
* of this group member. For each accept() on the server socket, a new thread is
* created that listens on the socket. For each outgoing message m, if m.dest is
* in the outgoing hash table, the associated socket will be reused to send
* message, otherwise a new socket is created and put in the hash table. When a
* socket connection breaks or a member is removed from the group, the
* corresponding items in the incoming and outgoing hash tables will be removed
* as well.
* <p>
*
* This functionality is in ConnectionTable, which is used by TCP. TCP sends
* messages using ct.send() and registers with the connection table to receive
* all incoming messages.
*
* @author Bela Ban
*/
public class TCP extends BasicTCP implements TCPConnectionMap.Receiver {
private TCPConnectionMap ct=null;
public TCP() {}
public String getName() {
return "TCP";
}
@ManagedAttribute
public int getOpenConnections() {
return ct.getNumConnections();
}
@ManagedOperation
public String printConnections() {
return ct.toString();
}
public void send(Address dest, byte[] data, int offset, int length) throws Exception {
ct.send(dest, data, offset, length);
}
public void retainAll(Collection<Address> members) {
ct.retainAll(members);
}
public void start() throws Exception {
ct=createConnectionTable(reaper_interval,
conn_expire_time,
bind_addr,
external_addr,
bind_port,
bind_port+port_range
);
ct.setReceiveBufferSize(recv_buf_size);
ct.setSendQueueSize(send_queue_size);
ct.setUseSendQueues(use_send_queues);
ct.setSendBufferSize(send_buf_size);
ct.setSocketConnectionTimeout(sock_conn_timeout);
ct.setTcpNodelay(tcp_nodelay);
ct.setLinger(linger);
// we first start threads in TP (http://jira.jboss.com/jira/browse/JGRP-626)
super.start();
}
public void stop() {
if(log.isDebugEnabled()) log.debug("closing sockets and stopping threads");
ct.stop(); //not needed, but just in case
super.stop();
}
protected void handleConnect() throws Exception {
if(isSingleton()) {
if(connect_count == 0) {
ct.start();
}
super.handleConnect();
}
else
ct.start();
}
protected void handleDisconnect() {
if(isSingleton()) {
super.handleDisconnect();
if(connect_count == 0) {
ct.stop();
}
}
else
ct.stop();
}
/**
* @param reaperInterval
* @param connExpireTime
* @param bindAddress
* @param startPort
* @throws Exception
* @return ConnectionTable Sub classes overrides this method to initialize a
* different version of ConnectionTable.
*/
protected TCPConnectionMap createConnectionTable(long reaperInterval,
long connExpireTime,
InetAddress bindAddress,
InetAddress externalAddress,
int startPort,
int endPort
) throws Exception {
TCPConnectionMap cTable;
if(reaperInterval == 0 && connExpireTime == 0) {
cTable=new TCPConnectionMap(getThreadFactory(),
this,
bindAddress,
externalAddress,
startPort,
endPort
);
}
else {
if(reaperInterval == 0) {
reaperInterval=5000;
if(log.isWarnEnabled())
log.warn("reaper_interval was 0, set it to " + reaperInterval);
}
if(connExpireTime == 0) {
connExpireTime=1000 * 60 * 5;
if(log.isWarnEnabled())
log.warn("conn_expire_time was 0, set it to " + connExpireTime);
}
cTable=new TCPConnectionMap(getThreadFactory(),
this,
bindAddress,
externalAddress,
startPort,
endPort,
reaperInterval,
connExpireTime
);
}
return cTable;
}
protected PhysicalAddress getPhysicalAddress() {
return ct != null? (PhysicalAddress)ct.getLocalAddress() : null;
}
}