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/*
* @(#)MessageConsumer.hpp 1.20 11/09/07
*/
#ifndef MESSAGECONUMSER_HPP
#define MESSAGECONUMSER_HPP
#include
#include "../error/ErrorCodes.h"
#include "Destination.hpp"
#include "ReceiveQueue.hpp"
#include "MessageConsumer.hpp"
#include "Message.hpp"
#include "ReceiveMode.h"
#include "../basictypes/HandledObject.hpp"
#include "../cshim/mqcallback-types-priv.h"
class Session;
/**
* Implements topic subscribers and queue receivers.
*/
class MessageConsumer : public HandledObject {
protected:
/** The Session that created this MessageConsumer */
Session * session;
/** The destination for packets consumed by this MessageConsumer */
Destination * destination;
/** The incoming queue for messages destined for this MessageConsumer */
ReceiveQueue * receiveQueue;
/** The ID unique to this connection that identifies this consumer */
PRInt64 consumerID;
/** True iff destination is a queue */
PRBool isTopic;
/** True iff this MessageConsumer is durable */
PRBool isDurable;
/** True iff this MessageConsumer is shared */
PRBool isShared;
/** True iff this MessageConsumer should not consume messages produced
* by this connection */
PRBool noLocal;
/** The subscription name. NULL if not durable and not shared */
const UTF8String * subscriptionName;
const UTF8String * messageSelector;
/** The optional callback function that notifies a consumer that a
* message has arrived */
MQMessageArrivedFunc messageArrivedCallback;
/** The void* user data that was passed to setMessageArrivedCallback.
* It is passed back to messageArrivedCallback */
void * messageArrivedCallbackData;
MQMessageListenerFunc messageListener;
void * messageListenerCallbackData;
ReceiveMode receiveMode;
PRInt32 prefetchMaxMsgCount;
PRFloat64 prefetchThresholdPercent;
private:
/** True iff the message consumer has been properly initialized and registered */
PRBool isInitialized;
// true if consumerID has been assigned
PRBool registered;
/** If initialization fails in the constructor, the errorCode that led to the
* failure is stored here. */
MQError initializationError;
PRBool isDMQConsumer;
/** initializes member variables to NULL/false */
void init();
PRBool isClosed;
SysMessageID lastDeliveredSysMessageID;
PRBool hasLastDeliveredSysMessageID;
MQError beforeMessageListener(const Message * message, MQError mqerror);
void afterMessageListener(const Message * message, MQError mqerror);
public:
/**
* Constructor.
*
* @param session the Session that created this MessageConsumer
* @param destination the Destination that this MessageConsumer receives messages on
* @param isDurable true iff this is a durable MessageConsumer
* @param durableName if isDurable, then this is the name of the durable consumer
* @param messageSelector
* @param noLocal true iff the consumer should not receive messages produced
* by this connection
* @param messageListener
* @param messageListenerCallbackData
* @param destination
*/
MessageConsumer(Session * const session,
Destination * const destination,
const PRBool isDurable,
const PRBool isShared,
const UTF8String * const subscriptionName,
const UTF8String * const messageSelector,
const PRBool noLocal,
MQMessageListenerFunc messageListener,
void * messageListenerCallbackData);
~MessageConsumer();
/** @return the type of this object for HandledObject */
virtual HandledObjectType getObjectType() const;
// Accessors
const Destination * getDestination() const;
PRInt64 getConsumerID() const;
PRBool isRegistered() const;
void setConsumerID(PRInt64 id);
PRInt32 getAckMode() const;
PRInt32 getPrefetchMaxMsgCount() const;
PRFloat64 getPrefetchThresholdPercent() const;
void setPrefetchMaxMsgCount(PRInt32 prefetchSize);
void setPrefetchThresholdPercent(PRFloat64 prefetchThreshold);
ReceiveMode getReceiveMode() const;
PRBool getIsTopic() const;
PRBool getIsDurable() const;
PRBool getIsShared() const;
PRBool getNoLocal() const;
const UTF8String * getSubscriptionName() const;
const UTF8String * getMessageSelector() const;
ReceiveQueue * getReceiveQueue() const;
PRBool getIsInitialized() const;
virtual MQError getInitializationError() const;
Session * getSession() const;
PRBool getHasLastDeliveredSysMessageID() const;
const SysMessageID * getLastDeliveredSysMessageID() const;
/** Called by ReceiveQueue::enqueueNotify to notify the consumer that a
message has been enqueued */
void messageEnqueued() const;
/** Set the callback for when a message arrives for this consumer */
MQError setMessageArrivedCallback(const MQMessageArrivedFunc messageArrivedFunc,
void * messageArrivedFuncData);
/**
* If there is a message waiting to be received, then it is returned
* in message. Otherwise, this method immediately returns.
*
* @param message the output parameter for the received message
* @return MQ_SUCCESS if successful and an error otherwise
*/
MQError receiveNoWait(Message ** const message);
/**
* Block until a message for this consumer arrives or an exception
* occurs on the connection.
*
* @param message the output parameter for the received message
* @return MQ_SUCCESS if successful and an error otherwise
*/
MQError receive(Message ** const message);
/**
* Block until a message for this consumer arrives,
* timeoutMilliSeconds elapse, or an exception occurs on the
* connection.
*
* @param message the output parameter for the received message
* @param timeoutMilliSeconds the number of milliseconds to wait for
* a message to arrive
* @return MQ_SUCCESS if successful and an error otherwise */
MQError receive(Message ** const message,
const PRUint32 timeoutMilliSeconds);
MQError onMessage(Message * message, PRBool * messageListenerInvoked);
/**
* Closes this consumer.
* @return MQ_SUCCESS if successful and an error otherwise
*/
MQError close();
/**
* for sync message consumer
*/
void stop();
/**
* for sync message consumer
*/
void start();
//
// Avoid all implicit shallow copies. Without these, the compiler
// will automatically define implementations for us.
//
private:
//
// These are not supported and are not implemented
//
MessageConsumer(const MessageConsumer& messageConsumer);
MessageConsumer& operator=(const MessageConsumer& messageConsumer);
};
#endif // MESSAGECONUMSER_HPP
