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/*
* @(#)ConvertPacket.java 1.14 06/29/07
*/
package com.sun.messaging.jmq.jmsserver.service.imq;
import java.util.*;
import java.io.*;
import com.sun.messaging.jmq.io.*;
import com.sun.messaging.jmq.util.log.*;
import com.sun.messaging.jmq.jmsserver.Globals;
import com.sun.messaging.jmq.jmsserver.data.handlers.*;
import com.sun.messaging.jmq.jmsserver.core.ConsumerUID;
/**
* this class handles converting data from old to new
* interest types, etc
* Its special case code (and probably slow) but the idea
* is to keep the kludgy code centralized
*/
// LKS - XXX update to handle both protocol and packet version
public class ConvertPacket
{
private Logger logger = Globals.getLogger();
Hashtable consumer_to_interest = new Hashtable();
Hashtable interest_to_consumer = new Hashtable();
Hashtable consumer_to_deliver = new Hashtable();
IMQConnection con = null;
int oldversion = 0;
int targetVersion = 0;
public ConvertPacket(IMQConnection con, int oldversion, int targetVersion)
{
this.con = con;
this.oldversion = oldversion;
this.targetVersion = targetVersion;
}
public void handleReadPacket(Packet msg) {
// OK .. convert to new version
// If we are VERSION2 ... dont do anything
// EXCEPT convert the properties
if (oldversion == Packet.VERSION2)
return;
msg.setVersion(targetVersion);
int type = msg.getPacketType();
switch (type) {
case PacketType.TEXT_MESSAGE:
case PacketType.BYTES_MESSAGE:
case PacketType.MAP_MESSAGE:
case PacketType.STREAM_MESSAGE:
case PacketType.OBJECT_MESSAGE:
case PacketType.MESSAGE:
handleDataRead(msg);
break;
case PacketType.DELETE_CONSUMER:
removeConsumerRequest(msg);
break;
case PacketType.ACKNOWLEDGE:
case PacketType.REDELIVER:
handleAcknowledgeRead(msg);
break;
case PacketType.DELIVER:
handleDeliverRead(msg);
default:
}
}
public void handleWritePacket(Packet msg) {
msg.setVersion(oldversion);
if (oldversion == Packet.VERSION2) {
return;
}
int type = msg.getPacketType();
switch (type) {
case PacketType.TEXT_MESSAGE:
case PacketType.BYTES_MESSAGE:
case PacketType.MAP_MESSAGE:
case PacketType.STREAM_MESSAGE:
case PacketType.OBJECT_MESSAGE:
case PacketType.MESSAGE:
handleDataWrite(msg);
break;
case PacketType.ADD_CONSUMER_REPLY:
handleConsumerResponse(msg);
break;
default:
}
}
static final int OLD_ACK_BLOCK_SIZE = 4 + SysMessageID.ID_SIZE;
private void handleAcknowledgeRead(Packet msg) {
if (msg.getTransactionID() != 0) {
TransactionHandler.convertPacketTid(con, msg);
}
DataInputStream is = new DataInputStream(
msg.getMessageBodyStream());
int size = msg.getMessageBodySize();
int ackcount = size/OLD_ACK_BLOCK_SIZE;
int[] clientids = new int[ackcount];
SysMessageID[] sysids = new SysMessageID[ackcount];
try {
for (int i = 0; i < ackcount; i ++) {
clientids[i] = is.readInt();
sysids[i] = new SysMessageID();
sysids[i].readID(is);
}
} catch (IOException ex) {
logger.log(Logger.INFO,"Internal Error, bad sysmessageid "
, ex);
}
ByteArrayOutputStream bos = new ByteArrayOutputStream();
DataOutputStream dos = new DataOutputStream(bos);
// reset the body XXX - LKS
try {
for (int i = 0; i < ackcount; i ++) {
Long newid = (Long)interest_to_consumer.get(
new Integer(clientids[i]));
if (newid == null) continue;
dos.writeLong(newid.longValue());
sysids[i].writeID(dos);
}
dos.flush();
bos.flush();
} catch (IOException ex) {
logger.log(Logger.INFO,"Internal Error, unable to convert "
+ " old packet ", ex);
}
msg.setMessageBody(bos.toByteArray());
}
// handle transaction
private void handleDataRead(Packet msg) {
if (msg.getTransactionID() != 0) {
TransactionHandler.convertPacketTid(con, msg);
}
}
// handle interest
private void handleDataWrite(Packet msg) {
Long newid = new Long(msg.getConsumerID());
Integer oldid = (Integer)consumer_to_interest.get(newid);
if (oldid == null) { // try deliver
oldid = (Integer)consumer_to_deliver.get(newid);
if (oldid != null && msg.getIsLast())
consumer_to_deliver.remove(newid);
}
if (oldid == null) { // consumer no longer exists
Globals.getLogger().log(Logger.DEBUG,
"Throwing out packet, could not find "
+"old consumer id for new id "
+ newid);
return; // throw out packet
}
msg.setConsumerID((long)oldid.intValue());
}
/* map old id -> new ID */
private void handleConsumerResponse(Packet msg) {
Hashtable props;
try {
props = msg.getProperties();
} catch (Exception ex) {
logger.log(Logger.INFO,"Internal Error, bad propertis "
, ex);
return; // no properties
}
Integer intr = (Integer)props.remove("JMQOldConsumerID");
Long newcid = (Long)props.get("JMQConsumerID");
/* Map them */
if (newcid != null && intr != null) {
consumer_to_interest.put(newcid, intr);
interest_to_consumer.put(intr, newcid);
}
}
/* map old id -> new ID */
private void handleDeliverRead(Packet msg) {
Hashtable props;
try {
props = msg.getProperties();
} catch (Exception ex) {
logger.log(Logger.INFO,"Internal Error, bad propertis "
, ex);
return; // no properties
}
Integer oldid = (Integer)props.get("JMQConsumerID");
if (oldid != null) {
ConsumerUID newcid = new ConsumerUID();
Long longcid = new Long(newcid.longValue());
props.put("JMQConsumerID", longcid);
consumer_to_deliver.put(longcid, oldid);
}
}
/* map old id -> new ID */
private void removeConsumerRequest(Packet msg) {
Hashtable props;
try {
props = msg.getProperties();
} catch (Exception ex) {
logger.log(Logger.INFO,"Internal Error, bad propertis "
, ex);
return; // no properties
}
Integer oldid = (Integer)props.get("JMQConsumerID");
if (oldid != null) {
Long newid = (Long)interest_to_consumer.get(oldid);
props.put("JMQConsumerID", newid);
// remove from tables
consumer_to_interest.remove(newid);
interest_to_consumer.remove(oldid);
}
}
}