WebSphere Business Integration Message Broker Basics

156 WebSphere Business Integration Message Broker Basics

2. Click on the canvas of the Broker Topology editor to add a collective to the

Broker Topology.

3. Click the Connection tool in the palette part of the Broker Topology editor. Use

the Connection tool to connect two brokers to the collective by creating two

connections in the same way that connections between message flows nodes

are made in the Message Flow Editor.

4. Save the editor contents (File

→ Save). The save option has the following

format: Save WBRK_QM Topology.

5. A Topology Configuration Deploy message is displayed (Figure 5-8 on

page 146). Select either Delta or Complete to deploy the configuration

changes that have been made to the brokers.

Figure 5-13 shows a collective of two brokers: WBRK_BROKER and

WBRK_BROKER2.

Figure 5-13 Brokers joined in a collective

Using a collective enables publish/subscribe messages to be communicated

across brokers.

5.3.2 Topics

Topics that are defined in publication messages and in subscription messages

control the routing of publish/subscribe messages. When a publication is created

by an application, a message that passes through a publish/subscribe message

flow is routed to applications that have subscribed to receive messages on that

topic. You can set up definitions of topics and subtopics within the Message

Brokers Toolkit, and these can be used to configure topic-based security to limit

which applications can access which messages passing through the system.

In order to view users and groups for setting security on topics, the following

tasks must have been performed:

򐂰 A User Name Server must be been set up (ideally using the same queue

manager as the Configuration Manager).

Chapter 5. Administration 157

򐂰 Channels between the User Name Server queue manager and any brokers

queue managers must be set up.

򐂰 Use the mqsichangebroker command to set the -j parameter, and to set the

queue manager for the User Name Server onto any brokers in the domain,

using the following format:

mqsichangebroker WBRK_BROKER -j -s WBRK_QM

򐂰 Use the mqsichangeconfigmgr command to set the User Name Server queue

manager on the Configuration Manager using the following format:

mqsichangeconfigmgr -s WBRK_QM

These instructions give an overview for creating topics and assigning security to

assign the publishers and subscribers who can use the topics that are created:

1. In the Broker Administration perspective, double-click Topics in the Domains

view.

2. In the Topics Hierarchy editor that is displayed, right-click in the Topics section

and select Create Topic from the context menu.

3. This opens the Topic wizard. Enter a name for the topic.

4. Click Next.

5. On the Principal Definition page (Figure 5-15 on page 159), define the

security settings for users and groups using the options to Deny or Allow

subscription or publication on this new topic. These can be added to and

edited later.

6. Click Finish to complete the task.