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/*
* @(#)GenerateUIDHandler.java 1.11 06/28/07
*/
package com.sun.messaging.jmq.jmsserver.data.handlers;
import java.nio.ByteBuffer;
import java.util.Hashtable;
import com.sun.messaging.jmq.util.UniqueID;
import com.sun.messaging.jmq.util.UID;
import com.sun.messaging.jmq.util.log.Logger;
import com.sun.messaging.jmq.io.Packet;
import com.sun.messaging.jmq.io.PacketType;
import com.sun.messaging.jmq.io.Status;
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;
import com.sun.messaging.jmq.jmsserver.data.PacketHandler;
import com.sun.messaging.jmq.jmsserver.util.BrokerException;
/**
* Handler class which deals with the GenerateUID packet.
*/
public class GenerateUIDHandler extends PacketHandler
{
private Logger logger = Globals.getLogger();
private static boolean DEBUG = false;
public GenerateUIDHandler()
{
}
/**
* Method to handle GenerateUID packet.
* We generate one or more unique ID's and return them in the body
* of the reply.
*/
public boolean handle(IMQConnection con, Packet msg)
throws BrokerException
{
if (DEBUG) {
logger.log(Logger.DEBUGHIGH, "GenerateUIDHandler: handle() [ Received GenerateUID Packet]");
}
Hashtable props = null;
try {
props = msg.getProperties();
} catch (Exception ex) {
logger.log(Logger.INFO,"Internal Error: unable to retrieve "+
" properties from generateUID message " + msg, ex);
props = new Hashtable();
}
Integer value = null;
int quantity = 1;
if (props != null) {
value = (Integer)props.get("JMQQuantity");
if (value != null) {
quantity = value.intValue();
}
}
int status = Status.OK;
// Each UID is a long (8 bytes);
int size = quantity * 8;
ByteBuffer body = ByteBuffer.allocate(size);
// Get the prefix used by this broker and allocate IDs.
// We could also do this by creating new jmq.util.UID's, but by
// doing it this way we avoid the object creation overhead.
short prefix = UID.getPrefix();
for (int n = 0; n < quantity; n++) {
body.putLong(UniqueID.generateID(prefix));
}
props = new Hashtable();
props.put("JMQStatus", new Integer(status));
props.put("JMQQuantity", new Integer(quantity));
if (((IMQBasicConnection)con).getDumpPacket() ||
((IMQBasicConnection)con).getDumpOutPacket())
props.put("JMQReqID", msg.getSysMessageID().toString());
// Send reply
Packet pkt = new Packet(con.useDirectBuffers());
pkt.setPacketType(PacketType.GENERATE_UID_REPLY);
pkt.setConsumerID(msg.getConsumerID());
pkt.setProperties(props);
body.rewind();
pkt.setMessageBody(body);
con.sendControlMessage(pkt);
return true;
}
}