You can configure how many messages can be handled by the bus,
when to discard messages, and which messaging engines the bus is going to
communicate with. You can also specify changes that can be made to the bus
which will not require a restart of the messaging engines.
Why and when to perform this task
To configure the properties of a bus, use the administrative console to complete the following steps:
Steps for this task
- In the navigation pane, click . A list of buses is displayed in the content pane.
- In the content pane, select
the bus that you want to configure.
- Specify the following properties for the bus:
- Description
- A service integration bus supports applications using message-based and service-oriented architectures. A bus is a group of interconnected servers and clusters that have been added as members of the bus. Applications connect to a bus at one of the messaging engines associated with its bus members.
- Enable bus security
- Select this option to inherit the secure administration setting of the cell. Deselect this option if you always wish to disable bus security.
When bus security is enabled,
that is, when the Secure property is selected and global security for the
cell is also selected, access to the bus itself and to all destinations on
the bus must be authorized.
- Inter-engine authentication alias
- The name of the authentication alias used to authorize communication between messaging engines on the bus. This field can be left blank. If a value is specified,
and bus security is enabled, incoming connections to the bus are controlled
to prevent unauthorized clients or messaging engines from establishing a connection.
- Mediations authentication alias
- The name of the authentication alias used to authorize mediations to access the bus.
- Inter-engine transport chain
- The transport chain used for communication between messaging engines in this bus.
The
transport chain must correspond to one of the transport chains defined in
the Messaging engine inbound transports settings for the server. All
servers automatically have a number of transport chains defined to them, and
it is also possible to create new transport chains.
When you specify
the name of a transport chain, that chain must be defined to all servers hosting
messaging engines in the bus. Otherwise, some messaging engines might not
be able to communicate with their peers in the bus.
When the use of
permitted chains is enforced and a protocol is not specified for intra-bus
communications then InboundSecureMessaging is assumed instead of InboundBasicMessaging.
This can be overridden by setting the protocol attribute in the bus configuration.
If InboundSecureMessaging is not a permitted chain then an error occurs.
- Discard messages
- Whether messages on a deleted message point should be retained at a system exception destination or can be discarded. Select
this option to indicate that after a queue has been deleted, any messages
left in the data store for that queue should be discarded.
- Configuration reload enabled
- Select this option to enable certain changes to the bus configuration to be applied without requiring the messaging engines to be restarted. These
changes are applied when destinations or mediations are added to or removed
from the bus. This option also controls whether automatic updates occur on
all the messaging engines on the bus.
- High message threshold
- A threshold above which the messaging system will take action to limit the addition of more messages to a message point. When
a messaging engine is created on the bus, the value of this property is used
to set the default high message threshold for the messaging engine.
- Specify topology, destination resources, Web services and additional
properties for the bus, as required. To restrict the number of
audit messages, add a custom property called audit.bus.authentication with
one of the following values:
- all (audit all attempts to authenticate to the bus)
- failure (audit only failure to authenticate to the bus)
- none (do not audit any attempts to authenticate to the
bus)
- Click OK.
- Save your changes to the master configuration.