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* and Distribution License("CDDL") (collectively, the "License"). You
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* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
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* language governing permissions and limitations under the License.
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* file and include the License file at packager/legal/LICENSE.txt.
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/*
* @(#)IMQEmbeddedConnection.java 10/28/08
*/
package com.sun.messaging.jmq.jmsserver.service.imq;
import java.io.IOException;
import java.security.Principal;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.Queue;
import javax.jms.JMSException;
import com.sun.messaging.jmq.io.Packet;
import com.sun.messaging.jmq.io.PacketType;
import com.sun.messaging.jmq.io.ReadWritePacket;
import com.sun.messaging.jmq.io.PacketDispatcher;
import com.sun.messaging.jmq.jmsserver.Globals;
import com.sun.messaging.jmq.jmsserver.core.Session;
import com.sun.messaging.jmq.jmsserver.data.PacketRouter;
import com.sun.messaging.jmq.jmsserver.resources.BrokerResources;
import com.sun.messaging.jmq.jmsserver.service.Connection;
import com.sun.messaging.jmq.jmsserver.service.Service;
import com.sun.messaging.jmq.jmsserver.util.BrokerException;
import com.sun.messaging.jmq.jmsserver.util.IMQBlockingQueue;
import com.sun.messaging.jmq.jmsservice.DirectBrokerConnection;
import com.sun.messaging.jmq.jmsservice.HandOffQueue;
import com.sun.messaging.jmq.util.lists.EventType;
import com.sun.messaging.jmq.util.lists.Reason;
import com.sun.messaging.jmq.util.log.Logger;
public class IMQDualThreadConnection extends IMQBasicConnection implements DirectBrokerConnection
{
class DummyQueue implements HandOffQueue
{
public Packet take() throws InterruptedException {
//does nothing
return null;
}
public void put(Packet p) throws InterruptedException{
processReadPacket((com.sun.messaging.jmq.io.Packet)p);
}
public void close() {
}
}
DummyQueue inputQueue;
// in this mode, packets from the client are processed by this class in the same thread,
// so we send the reply back using a ThreadLocal for maximum performance
ThreadLocal> replies = new ThreadLocal>();
// packets which originate in the broker (e.g. a message being sent to a consumer)
// are written to the output queue for the client to pick up in another thread
IMQBlockingQueue outputQueue;
PacketDispatcher replyDispatcher;
/**
* constructor
*/
public IMQDualThreadConnection(Service svc,
PacketRouter router)
throws IOException, BrokerException
{
super(svc, router);
inputQueue = new DummyQueue();
outputQueue = new IMQBlockingQueue();
setConnectionState(Connection.STATE_CONNECTED);
}
/**
* sets the connection state
* @return false if connection being destroyed
*/
public boolean setConnectionState(int state) {
this.state = state;
if (this.state >= Connection.STATE_CLOSED) {
return false;
}
if (state == Connection.STATE_AUTHENTICATED) {
logConnectionInfo(false);
}
return true;
}
public HandOffQueue getClientToBrokerQueue() {
return inputQueue;
}
public HandOffQueue getBrokerToClientQueue() {
return outputQueue;
}
/**
* This method is used only if "sync replies" have been enabled
*
* Puts the specified reply packet onto the Queue for the current thread, which will be saved in a ThreadLocal
* so that is can be obtained by the requester, which will be the same thread
*
* This method then calls into the client to process (dispatch) the reply packet.
* We need to do this now rather than after this method returns to avoid packets being processed by the client out of order
*
* @param packet the reply packet for the current thread
*/
public void putReply(Packet packet) {
Queue packets = replies.get();
if (packets==null){
packets = new LinkedList();
replies.set(packets);
}
packets.offer(packet);
// process the packet on the client
try {
replyDispatcher.dispatch((ReadWritePacket)packet);
} catch (JMSException e) {
logger.logStack(Logger.ERROR, "Error dispatching reply packet "+packet, e);
}
}
/**
* Fetches the reply packet from the reply queue for the current thread, which is saved in a ThreadLocal
*
* @return the reply packet for the current thread
*/
public Packet fetchReply(){
Queue packets = replies.get();
return packets.poll();
}
public void checkState() {
// do nothing
}
/**
* start sending JMS messages to the connection
*/
public void startConnection() {
super.startConnection();
// added to fix CR 6879664
synchronized (sessions) {
Iterator itr = sessions.values().iterator();
while (itr.hasNext()) {
Session session = ((Session) itr.next());
// Pull messages until not busy
while (session.isBusy()) {
// NOTE: this should work for queues because they require a
// resume flow from the client
Packet emptyPacket = new Packet();
session.fillNextPacket(emptyPacket);
// write packet
writePacket(emptyPacket, false);
}
}
}
}
public boolean isBlocking() {
return true;
}
//turn off flow
public void setFlowCount() {
//do nothing
}
public void haltFlow() {
//do nothing
}
public void resumeFlow(int cnt)
{
//do nothing
}
public void cleanupControlPackets(boolean shutdown) {
//LKS-XXX
// not sure, for now do nothing
}
public boolean useDirectBuffers() {
return true;
}
protected void checkConnection() {
//do nothing
}
protected void flushConnection(long timeout) {
//do nothing
}
public void logConnectionInfo(boolean closing) {
this.logConnectionInfo(closing,"Unknown");
}
public void logConnectionInfo(boolean closing, String reason) {
String[] args = {
getRemoteConnectionString(),
localServiceString(),
Integer.toString(Globals.getConnectionManager().size()),
reason,
"0", /* LKS-XXX what are the right values */
Integer.toString(service.size())
};
if (!closing) {
logger.log(Logger.INFO, BrokerResources.I_ACCEPT_CONNECTION, args);
} else {
logger.log(Logger.INFO, BrokerResources.I_DROP_CONNECTION, args);
}
}
public void processReadPacket(Packet p) {
msgsIn ++;
if (p.getPacketType() < PacketType.LAST)
pktsIn[p.getPacketType()] ++;
if (DEBUG || DUMP_PACKET || IN_DUMP_PACKET) {
int flag = (DUMP_PACKET || IN_DUMP_PACKET) ? Logger.INFO
: Logger.DEBUGHIGH;
logger.log(flag, "\n------------------------------"
+ "\nReceived incoming Packet - Dumping"
+ "\nConnection: " + this
+ "\n------------------------------"
+ "\n" + p.dumpPacketString(">>>>****")
+ "\n------------------------------");
}
router.handleMessage(this, p);
}
public boolean isDirectBuffers() {
// does not apply
return false;
}
public void sendControlMessage(Packet p)
{
if (p.getPacketType() > PacketType.MESSAGE) {
p.setIP(ipAddress);
p.setPort(0);
}
writePacket(p, true);
}
public void writePacket(Packet p, boolean control) {
if (control) {
if (DEBUG || DUMP_PACKET || OUT_DUMP_PACKET) {
int flag = (DUMP_PACKET || OUT_DUMP_PACKET)
? Logger.INFO : Logger.DEBUGHIGH;
logger.log(flag, "\n------------------------------"
+"\nSending Control Packet - Dumping"
+ "\n------------------------------"
+ "\n" + p.dumpPacketString("<<<<****")
+ "\n------------------------------");
}
} else {
if (DEBUG || DUMP_PACKET || OUT_DUMP_PACKET) {
int flag = (DUMP_PACKET || OUT_DUMP_PACKET)
? Logger.INFO : Logger.DEBUGHIGH;
logger.log(flag, "\n------------------------------"
+"\nSending JMS Message -"
+ " Dumping"
+ "\n------------------------------"
+ "\n" + p.dumpPacketString("<<<<****")
+ "\n------------------------------");
}
}
pktsOut[p.getPacketType()] ++;
//LKS- deal with metrics
try {
ReadWritePacket rp = new ReadWritePacket();
rp.fill(p, !control);
// CR 6897721 always sent STOP_REPLY via the output queue
if (Globals.getAPIDirectTwoThreadSyncReplies() &&
rp.isReply() && rp.getPacketType()!=PacketType.STOP_REPLY) {
// this is a reply packet
// this is the same thread that sent the request, so we
// save the reply in a ThreadLocal to pass it directly to the requester
putReply(rp);
} else {
// this packet is not a reply to the client but originates in the broker
// (e.g. a message being sent to a consumer)
// write it to the output queue for the client to pick up in due course
outputQueue.add(rp);
}
} catch (IOException ex) {
logger.log(Logger.DEBUG,"Unable to duplicate packet ", ex);
}
}
public void eventOccured(EventType type, Reason r, Object target, Object oldval, Object newval,
Object userdata)
{
//a session has something to do
Session s = (Session)target;
if (!runningMsgs){
// Connection is stopped so not sending messages to consumers
return;
}
// Pull messages until not busy
while (s.isBusy()) {
//NOTE: this should work for queues because they require a resume flow from the client
Packet emptyPacket = new Packet();
s.fillNextPacket(emptyPacket);
//write packet
writePacket(emptyPacket, false);
}
}
/**
* The debug state of this object
*/
public synchronized Hashtable getDebugState() {
Hashtable ht = super.getDebugState();
// LKS - XXX
ht.put("transport","Embedded2");
ht.put("inputQueue",inputQueue.toString());
ht.put("outputQueue",outputQueue.toString());
return ht;
}
public String getRemoteConnectionString() {
if (remoteConString != null)
return remoteConString;
boolean userset = false;
String userString = "???";
if (state >= Connection.STATE_AUTHENTICATED) {
try {
Principal principal = getAuthenticatedName();
if (principal != null) {
userString = principal.getName();
userset = true;
}
} catch (BrokerException e) {
if (DEBUG)
logger.log(Logger.DEBUG,"Exception getting authentication name "
+ conId, e );
}
}
String retstr = userString + "@" +
"Direct2" + ":" +
getConnectionUID();
if (userset) remoteConString = retstr;
return retstr;
}
String localsvcstring = null;
protected String localServiceString() {
if (localsvcstring != null)
return localsvcstring;
localsvcstring = service.getName();
return localsvcstring;
}
// -------------------------------------------------------------------------
// Basic Connection Management
// -------------------------------------------------------------------------
public synchronized void closeConnection(
boolean force, int reason, String reasonStr)
{
//LKS-XXX
notifyConnectionClosed();
}
/**
* This method is used only if "sync replies" have been enabled
*
* Specify that the supplied ReplyDispatcher should be used to process reply packets
*
* @param rd The ReplyDispatcher to be used
*/
public void setReplyDispatcher(PacketDispatcher rd){
replyDispatcher = rd;
}
}
