using wmq with_was_and_liberty

Using WMQ with WAS and LibertyLohitashwa Thyagarajemail: lohitashwa@in.ibm.comtwitter: @lohitashwa

linkedin: lohitashwa

IBM® WebSphere® Application Server

Enterprise standard Java™ Application Server

Highly scalable: single server up to massive network deployment

Web gui and command line interface (wsadmin)

Liberty

Using WebSphere MQ with WebSphere Application Server and the Liberty Profile

Lightweight, Developer focussed

Eclipse based: server.xml and WAS Developer Tools

wasdev.net

Bundled in WebSphere Application Server version 8.5.5

WAS’ messaging in a slide

• WebSphere Application Server (WAS) is a JEE application server, JEE includes support for asynchronous messaging using JMS (Java Message Service)

• Allows Java application interactions to be loosely coupled• Temporal and transactional decoupling of applications

• A standardised programming interface• Implemented by a JMS provider

• JMS applications can be coded to be ignorant of the underlying JMS provider– Provider specific configuration, such as how to connect to a messaging provider, is contained

within JMS resources held in JNDI, defined at application deployment time

• JMS is not a transport protocol– No standardised ability to couple different JMS providers

• JMS Supports two messaging models• Point-to-point – using queues• Publish/subscribe – using topics

• WebSphere Application Server provides first class support for two JMS messaging providers

• An embedded messaging provider, the Default Messaging provider (or Service Integration Bus)

• WebSphere MQ as an external messaging provider

IBM MQ in a slide

• IBM MQ (WMQ)• WMQ is IBM’s flagship asynchronous messaging product

• Queues are managed by queue managers

• Queue Managers can be connected together to form a network, or cluster

• Messaging applications connect to queue managers to access queues– Applications can send messages to any queue in the network from their queue

manager

– Applications can receive messages from queues on their queue manager

• WMQ supports the point-to-point and publish/subscribe messaging models

• WMQ as the JMS provider in WAS• WMQ supports the JMS programming interface for Java applications.

• Applications in WAS can use JMS to interact with WMQ queues (and topics)– WAS V6 and V6.1 contains a WMQ JMS client to enable this

– WAS V7 contains the WMQ V7 JCA resource adaptor

• WAS applications connect to a queue manager using:– Bindings – when application and queue manager are on the same server

– Client – when application server and queue manager are on separate, networked, servers - using a TCP/IP socket

Service integration bus in a slide

• Service Integration Bus (SIBus)• SIBus is a native component of WAS, forming the asynchronous messaging

platform for application server based products

• Logically:– A bus is a logical entity that contains destinations (e.g. queues/topic spaces)

– Messaging applications connect to the bus to access the destinations

– A bus is location transparent, all destinations and their messages are available from anywhere in the bus

• Physically:– A WAS cell contains application servers, or clusters of application servers

– These can optionally be made a member of a bus

– Destinations are assigned to bus members

– Bus members run messaging engines within the application server JVMs

– Messaging engines manage the runtime and persistent state of messages in the bus

– Messaging applications form a connection to a messaging engine

– Messages are routed from any messaging engine in the bus to the application

• SIBus as the JMS provider in WAS• SIBus supports the JMS programming interface for Java applications.

– Natively supporting both point-to-point and publish/subscribe messaging models

• SIBus is the default JMS provider in WAS – hence the “Default messaging provider”

Options for accessing your WMQ backbone

• Three key options

1. Use WMQ as the JMS provider in WAS

2. Use the service integration bus in WAS and connect that

messaging system with your WMQ backbone

3. Use SIBus for intra-WAS messaging, use WMQ for inter-system

messaging

Option 1

WMQQMgr

ApplicationServer

Application Server

WMQQMgr

Application Application

WebSphere MQ as the JMS provider in WAS

WMQQMgr

Existing WMQapplication

CICSapplication

WMQ backbone

Applications connect directly into the WMQ backbone

Version 6 Messaging Architecture

The solution now

Picture courtesy: public domainSource: http://www.livescience.com/20404-gallery-sun-gods-goddesses.html

Introducing the IBM® WebSphere® MQ JMS Resource Adapter

wmq.jmsra.rar

Why have a Resource Adapter?

Java Enterprise Edition(Java EE)

Java Connector Architecture(JCA)

Harnessing the Resource Adapter: WAS

Deployed inside WebSphere Application Server

WAS is shipped with a validated RA

RA can be a different version to the Queue Manager

Harnessing the Resource Adapter: Liberty

�Supported from Liberty version 8.5.5

�Download from IBM Fix Central – search 'Resource Adapter'

<feature>localConnector-1.0</feature>

<feature>ejbLite-3.1</feature>

<feature>jmsMdb-3.1</feature>

<feature>wmqJmsClient-1.1</feature>

</featureManager>

<variable name="wmqJmsClient.rar.location"

value="C:\MY_RA_FOLDER\wmq.jmsra.rar"/>

</server>

Managing the Resource Adapter

Client mode – no configuration necessary

Bindings mode: WAS: set 'native library path' on Resource Adapter

Liberty: <wmqJmsClient nativeLibraryPath="/opt/mqm/java/lib64"/>

Updates to RA:WAS: WAS Fix Packs and iFixes

Liberty: updated download from Fix Central

Version 7 onwards Messaging Architecture

Practical benefits: standardised, well-versioned connections

Photo courtesy: public domainSource: http://pixabay.com/en/industrial-mess-electric-power-69750/

Photo courtesy: public domainSource: http://pixabay.com/en/communication-connection-113613/

Bindings mode architecture

Practical benefits

Simplified maintenance

Ease of migration

Easier consumption of Multi-Version WMQ

Multi-instance queue manager

High availability with Multi-Instance Queue Managers

WebSphere MQ Automatic Client Reconnect is NOT supported with Java EE Application Servers

Configure WAS to automatically reconnect instead

High availability with Multi-Instance Queue Managerswith Activation Specifications

Connection Factory

Connection Name List – host(port) for Active instance, host(port) for standby instance CCDT (Client Channel Definition Table)

Resource Adapter

Reconnection Retry Count – default is 5Reconnection Retry Interval – default is 5 minutes

Activation Specification

Connection Name List – host(port) for Active instance, host(port) for standby instanceStop endpoint if message delivery fails

Number of sequential delivery failures before suspending endpoint

High availability with Multi-Instance Queue Managerswith Listener Ports

Connection Factory

Connection Name List – host(port) for Active instance, host(port) for standby instance CCDT (Client Channel Definition Table)

Message Listener Service

Maximum Retries (on listener port) – default is 0Custom property: MAX.RECOVERY.RETRIES – default is 5

Custom property: RECOVERY.RETRY.INTERVAL – default is 60 seconds

Let’s look at other 2 Options !!!

WMQQMgr

Application

Server

Application

Server

WMQQMgr

Application Application

MessagingEngine

SIBus for WAS application messaging,

An SIBus interacts with WMQ to access the messaging backbone

WMQ backbone

CICSapplication

Messages flow between SIBus and WMQ where interactions with the WMQ backbone are necessary

Application

Server

MessagingEngine

Application

Option 2

Asynchronous connectivity to WMQ

through the SIBus

Asynchronous connectivity to WMQWMQ-to-WMQ

• WMQ queue managers can be networked together, allowing messages to be asynchronously sent from applications connected to one queue manager to queues located on other queue managers

• Store and forward of routed messages

• Network connections using channels

• Message routing using remote queue managers and remote queues

QueueManager

WMQ network

QueueManager

Asynchronous connectivity to WMQSIBus-to-WMQ

• So, it’s just a matter of joining the two together…

• The WMQ queue manager sees the connected SIBus as another remote

queue manager, connected via a sender and receiver channel, allowing

messages to be routed through to the SIBus as for any other connected queue

manager.

• The SIBus sees the connected queue manager as another bus, connected via

a foreign bus connection, allowing messages to be routed through to the queue

manager as for any other connected bus.

• Messaging applications on either side are not aware of the transition.

AppServer AppServer

SIBus network

WMQ network

QueueManager

Asynchronous connectivity with WMQ

• What does this add?• Ability to asynchronously queue messages in the WAS system

while connectivity with the WMQ backbone is unavailable

• All JMS resources defined are SIBus resources, referring to SIBus objects.– Fine grain authorisation access to those resources can be managed

using SIBus authorisation, within the WAS configuration domain.

– WMQ configuration is restricted to the SIBus configuration domain.

– WMQ topology is hidden from JMS resource configuration

• What does it cost?• Extra latency

• Only able to send messages to WMQ queues,unable to receive from WMQ queues– WMQ applications must send to queues located

in the SIBus (using remote WMQ queues)

• Additional configuration• Additional runtime management

SIBus network

WMQ network

Synchronous connectivity to WMQ

through the SIBus

Synchronous connectivity with WMQ

• When WMQ is the JMS provider in WAS, a JMS application will connect

directly to a queue manager

• This requires a WMQ JMS ConnectionFactory, defining where the queue

manager is and how to connect to it.

• The embedded WMQ JMS client in WAS is then used to synchronously

connect to the queue manager.

• The application will also require a WMQ JMS Queue which defines the

actual queue located on that queue manager.

• This allows synchronous style messaging with WMQ

WMQ JMS client

AppServer

WMQ network

QueueManager

WAS config

ConnectionFactory<QMgr location>

JMS Queue<WMQ queue name>

WMQ JMS

SIBus synchronous connectivity with WMQ

• It is possible to insert the SIBus runtime between the application and the queue manager, such that the JMS application actually connects to the SIBus runtime and the bus manages the synchronous connection to a queue manager when required.

• This requires an SIBus JMS ConnectionFactory, defining which bus to connect to, and an

SIBus JMS Queue, defining which SIBus queue to send or receive messages from.

• The configuration detailing which queues are available on which queue managers, and how to

connect to those queue managers is contained in the SIBus configuration.

• A connection will then be made to a messaging engine in the bus, which will then make a

synchronous connection to the correct queue manager.

• This allows synchronous style messaging with WMQ

AppServer

WMQ network

QueueManager

WAS config

SIBus config

WMQ bus member<QMgr location>

SIBus queue<WMQ queue>

ConnectionFactory<SIBus name>

JMS Queue<SIBus queue name>

SIBus JMS

• WAS V6.1 introduced the ability to use the SIBus to synchronously connect a WAS application to WMQ

• This allows WMQ queues to be directly accessed by applications connected to a SIBus

– Presents a WMQ queue as a SIBus destination

– Applications can send messages to and receive messages from these

destinations when they are connected to any ME in the SIBus

• In WAS V6.1, this is only supported for WMQ queue managers on the z/OS platform and they must be at

WebSphere MQ v6 CSD1 or above.

• WAS V7 adds the support for WebSphere MQ V7 queue managers on all platforms

• This effectively allow applications connected to the SIBus to connect directly to WMQ queue managers and queue

sharing groups. This is done using a WMQ client or bindings connection

• SIBus applications and WMQ applications can be producing and consuming from the same underlying WMQ

• What does this add?

• All JMS resources defined are SIBus resources, referring to SIBus

objects within the WAS configuration domain.

– WMQ configuration is restricted to the SIBus configuration domain.

• WMQ shared queue on z/OS can be fully utilised from WAS

– Supports transaction recovery across multiple members of the queue

sharing group, enabling full shared queue workload balancing and high

availability.

• What does it cost?

• Extra code path, slower performance

• Additional overall configuration complexity

• Additional runtime management

WMQ network

WAS config

SIBus config

WMQQMgr

Application

Server

Application

Server

WMQQMgr

Application

SIBus for WAS-WAS application messaging,

WMQ for WAS-‘other’ messaging

WMQ backbone

CICSapplication

WMQQMgr

Application

Server

Application

MessagingEngine

ApplicationMessagingEngine

Application

Option 3

Product Connectivity Scenarios Information Centre

�Hands on, scenario based education for MQ:WAS and MQ:Liberty

inter-operation

IBM Product Information

� See the new IBM Knowledge Center – No more infocenters from 2014!

Summary

�Different options to connect to WMQ from WAS

�WebSphere MQ JMS RA provides MQ messaging to WAS

�Easier maintenance and upgrading

�MuIti Instance Queue Managers – configure your Application

Server

Questions?

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