Scatter gather flow control

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  Scatter gather flow control
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  • 1. Scatter Gather Flow Control in Mulesoft
  • 2. Scatter-Gather • The routing message processor Scatter-Gather sends a request message to multiple targets concurrently. It collects the responses from all routes, and aggregates them into a single message.
  • 3. • Scatter-Gather replaces the All message processor, which is deprecated as of Mule 3.5.0. Note that, unlike All, Scatter-Gather executes routes concurrently instead of sequentially. • Parallel execution of routes can greatly increase the efficiency of your application and provides more information than sequential processing. Refer to migration details below for more information about the differences you can expect.
  • 4. • Scatter-Gather Behavior and Exceptions • CompositeRoutingException • Customizing Aggregation Strategies • Configuration • Modeling Scatter-Gather in a Flow • General Tab
  • 5. • Advanced Tab • Scatter-Gather Threading Profiles • Migrating to Scatter-Gather from the All Message Router • Why Migrate? • Differences Between Scatter-Gather and the All Router • Complete Code Example • Serial Multicast with Scatter-Gather
  • 6. • The Scatter-Gather router sends a message for concurrent processing to all configured routes. The thread executing the flow that owns the router waits until all routes complete or time out. • If there are no failures, Mule aggregates the results from each of the routes into a message collection (MessageCollection class). Failure in one route does not stop the Scatter-Gather from sending messages to its other configured routes, so it is possible that many, or all routes may fail concurrently.
  • 7. • By default, if any route fails, Scatter-Gather performs the following actions: • sets the exception payload accordingly for each route • throws a CompositeRoutingException, which maps each exception to its corresponding route using a sequential route ID • Catching the CompositeRoutingException allows you to gather information on all failed routes.
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