Message Dispatcher - Enterprise Integration Patterns (original) (raw)

An application is using Messaging. The application needs multiple consumers on a single Message Channel to work in a coordinated fashion.

How can multiple consumers on a single channel coordinate their message processing?

Create a Message Dispatcher on a channel that will consume messages from a channel and distribute them to performers.

A Message Dispatcher consists of two parts:

1. Dispatcher – The object that consumes messages from a channel and distributes each message to a performer.
2. Performer – The object that is given the message by the dispatcher and processes it.

When a Message Dispatcher receives a message, it obtains a performer and dispatches the message to the performer to process it. A performer can delegate to the rest of its application to help process its message. The performer could be newly created by the dispatcher, or could be selected from a pool of available performers. Each performer can run in its own thread to process messages concurrently. All performers may be appropriate for all messages, or the dispatcher may match a message to a specialized performer based on properties of the message.

Message Dispatcher Sequence

...Read the entire pattern in the book Enterprise Integration Patterns

Related patterns:

Competing Consumers, Datatype Channel, Remote Procedure Invocation, Event-Driven Consumer, Message Channel, Selective Consumer, Messaging, Point-to-Point Channel, Polling Consumer, Publish-Subscribe Channel, Claim Check, Transactional Client

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