Progress Sonic ESB Configuration and Management Guide

Chapter 2: ESB Containers
The following events occur as the ESB Container manages message transfer:
1. The ESB Container reads configuration information from the Directory Service.
2. The ESB Container establishes JMS connections to Progress SonicMQ destinations
(topics or queues).
3. The ESB Container pools JMS connections.
4. Messages arriving on their Progress SonicMQ destinations are allocated to services
that implement the XQService interface by calling their service( ) method, using the
predefined Quality of Service (QoS)—EXACTLY_ONCE, AT_LEAST_ONCE, or BEST_EFFORT.
5. Messages are processed by the services.
6. Output messages are generated by the services and placed in an OUTBOX.
7. Messages in the OUTBOX are sent to SonicMQ destinations by the services, or to other
services in the container.
An ESB Container is deployed as a component in a management container. The
management container caches all the information that it looks up in its domain manager’s
Directory Service store. If the domain manager is not accessible and the management
container is not looking up any new configurations (including resources such as
stylesheets, new services, or endpoints) at that time, then the container can continue
running despite the domain manager failure. However, if a new configuration is necessary
that is not cached, it must wait for the Directory Service to be restarted.
In addition to providing configuration information, a management container also provides
access to a common log file for all of the components it hosts. (For information on
container caching and logging, see the “Configuring Containers and Collections” and
“Managing Containers and Collections” chapters in the Progress SonicMQ Configuration
and Management Guide.)
The following sections describe how to manage installed ESB Containers and create new
ESB Containers. Use the Sonic Management Console to add Progress Sonic ESB
components to a container.
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