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2007 IBM Corporation

WebSphere MQIntroduction

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Queue 2

Queue 1

Introduction to Messaging and Queueing

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Not

available

Notavailable

Not

available

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A

A

A

B

B

B

BNot

available

Time Independence

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A Rather Accurate Analogy

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Major calls

MQCONN(X)

MQDISC

MQOPENMQCLOSE

MQPUT

MQPUT1

MQGETMinor calls

MQBEGIN

MQCMIT

MQBACKMQINQ

MQSET

MQI

Application

Queue manager

Process objectQueue manager

object

MQI Calls

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Application dataMessage

descriptor

Expiry

GroupId

MsgSeqNumber

Offset

Format

Encoding

CodedCharSetId

Persistence

Priority

MsgId

Correl_ Id

Report

Feedback

ReplyToQ

ReplyToQMgr

Message Descriptor MQMD

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Request

Reply

Report

Datagram

Message Types

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"Local"

Queue Manager"

Real

Application Q

MQPUT

MQGET

"Remote

Queue Manager"

Remote Q

Definition

.. describesand points to

Local Q

CC/RC

MQPUT

MQGET

Application

Local and Remote Queues

CC/RC

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Application

MQPUT

CC/RC

Queue Manager Log Data Set(s)

Queue HoldingData Set(s)

Application Q

Transmission Q

Dead Letter Q

Assured Message Delivery

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B

Queue 1

Queue 2

Synchronous Application Model

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MQPUT HotelQ

MQPUT Car_hireQ

MQPUT AirlineQ

MQGET Reply to Q

Hotel

Car_hire

Airline

MQPUT

HotelQ

Car_hireQ

AirlineQ

MQPUT

Reply

to Q

MQPUT

Parallel Processes

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Write

Send

Syncpoint

Receive

Write

Syncpoint

DB

DB2 phasecommit

Unit of Work

Write

Put

SyncpointGet

Write

Syncpoint

DB

DBUnit of Work 2

q QUnit of Work 1

Unit of Work3

Synchronous Model

Asynchronous Model

Asynchronous Syncpoint

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B

Appl.Q

Queue Manager

Trigger

Mechanism

External

Facility

START

Triggering (Overview)