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/*
* @(#)DeliverHandler.java 1.30 06/28/07
*/
package com.sun.messaging.jmq.jmsserver.data.handlers;
import java.io.*;
import java.util.*;
import com.sun.messaging.jmq.jmsserver.resources.*;
import com.sun.messaging.jmq.jmsserver.data.PacketHandler;
import com.sun.messaging.jmq.io.Packet;
import com.sun.messaging.jmq.jmsserver.core.PacketReference;
import com.sun.messaging.jmq.jmsserver.core.Destination;
import com.sun.messaging.jmq.jmsserver.service.Connection;
import com.sun.messaging.jmq.jmsserver.util.BrokerException;
import com.sun.messaging.jmq.jmsserver.util.PacketUtil;
import com.sun.messaging.jmq.jmsserver.core.ConsumerUID;
import com.sun.messaging.jmq.io.*;
import com.sun.messaging.jmq.util.log.Logger;
import com.sun.messaging.jmq.jmsserver.Globals;
import com.sun.messaging.jmq.jmsserver.service.imq.IMQConnection;
import com.sun.messaging.jmq.jmsserver.service.imq.IMQBasicConnection;
/**
* Handler class which deals with requests delivering messages
*/
public class DeliverHandler extends PacketHandler
{
// An Ack block is a 4 byte interest ID and a SysMessageID
static final int DELIVER_BLOCK_SIZE = SysMessageID.ID_SIZE;
private Logger logger = Globals.getLogger();
private static boolean DEBUG = false;
public DeliverHandler() {
}
/**
* Method to handle DELIVER messages
*/
public boolean handle(IMQConnection con, Packet msg)
throws BrokerException
{
String reason = null;
Hashtable props = null;
try {
props = msg.getProperties();
} catch (Exception ex) {
logger.log(Logger.INFO,"Internal Error: unable to retrieve "+
" properties from deliver message " + msg, ex);
props = new Hashtable();
}
int size = msg.getMessageBodySize();
int ackcount = size/SysMessageID.ID_SIZE;
int mod = size%SysMessageID.ID_SIZE;
if (ackcount == 0 ) {
throw new BrokerException(Globals.getBrokerResources().getString(
BrokerResources.X_INTERNAL_EXCEPTION,"Empty Deliver Message"));
}
if (mod != 0) {
throw new BrokerException(Globals.getBrokerResources().getString(
BrokerResources.X_INTERNAL_EXCEPTION,"Invalid Deliver Message Size: " + size +
". Not multiple of " + SysMessageID.ID_SIZE));
}
if (DEBUG) {
logger.log(Logger.DEBUG,"Deliver Message: processing message {0} {1}",
msg.toString(),
con.getConnectionUID().toString());
}
Long lid = (Long)props.get("JMQConsumerID");
assert lid != null;
long id = lid == null ? (long)0 : lid.longValue();
assert id != 0;
DataInputStream is = new DataInputStream(
msg.getMessageBodyStream());
Packet[] sentp = new Packet[ackcount];
int i = 0; // actual count
try {
for (i = 0; i < ackcount; i ++ ) {
SysMessageID sysid = new SysMessageID();
sysid.readID(is);
PacketReference ref = Destination.get(sysid);
Packet realp = (ref == null ?
null : ref.getPacket());
if (ref != null && !ref.isInvalid() && realp != null) {
//XXX revisit if this should not be
// using a packet (queued instead)
Packet p = new Packet(con.useDirectBuffers());
p.fill(realp);
p.setConsumerID(id);
sentp[i] = p;
}
}
} catch (Exception ex) {
logger.logStack(Logger.ERROR,
Globals.getBrokerResources().getString(
BrokerResources.X_INTERNAL_EXCEPTION,
"\tackcnt = " + ackcount + "\n"
+ PacketUtil.dumpPacket(msg) + "\n"
+ "\t" + PacketUtil.dumpThrowable(ex)), ex);
assert false ;
}
// OK .. time to set the lbit on the message
int status = Status.OK;
try {
if (i > 0 ) {
assert sentp[i -1] != null;
sentp[i-1].setIsLast(true);
} else {
reason = "NOT FOUND";
status= Status.NOT_FOUND;
}
} catch (Exception ex) {
assert false;
reason = ex.getMessage();
status = Status.ERROR;
if (ex instanceof BrokerException)
status = ((BrokerException)ex).getStatusCode();
}
// do we need to create a reply packet each time ?
Packet pkt = new Packet(con.useDirectBuffers());
pkt.setConsumerID(msg.getConsumerID());
pkt.setPacketType(PacketType.DELIVER_REPLY);
Hashtable hash = new Hashtable();
hash.put("JMQStatus", new Integer(status));
if (reason != null)
hash.put("JMQReason", reason);
if (((IMQBasicConnection)con).getDumpPacket() ||
((IMQBasicConnection)con).getDumpOutPacket())
hash.put("JMQReqID", msg.getSysMessageID().toString());
pkt.setProperties(hash);
con.sendControlMessage(pkt);
// before 3.5, messages were queued on the connection
// however -> this means that browsing a queue
// could never work if a connection is paused
// 3.5 and beyond, messages are place on the control
// queue
for (int j =0; j < i; j ++) {
assert sentp[j] != null;
if (sentp[j] != null)
con.sendControlMessage(sentp[j]);
}
return true;
}
}