[SM-1008] Resequencer pattern for EIP component

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.2
• Fix Version/s: 3.2
• Component/s: servicemix-eip

Environment

Java 1.5

• Patch Info: Patch Available
• Assignee: Guillaume Nodet
• Reporter: Martin Krasser
• Created: 21/Jul/07 06:46
• Updated: 01/Aug/07 05:04
• Resolved: 01/Aug/07 05:04

Description

Attached are patches that include a resequencer endpoint for the servicemix-eip component.

• patch-servicemix-eip.txt: resequencer classes
• patch-servicemix-core.txt: general helper classes

The resequencing algorithm is designed to work on streams of objects (e.g. MessageExchanges) based on a timeout policy. It works slightly different than Camel's resequencer as it doesn't make batch-reads of predefined (maximum) size (although a capacity parameter prevents the resequencer from running out of memory). The algorithm details are described in the javadocs of class

• org.apache.servicemix.eip.support.resequence.ResequencerEngine

This class is independent of JBI/ServiceMix. It can be configured to work on any stream of objects by providing a SequenceElementComparator<E> implementation. The class

• org.apache.servicemix.eip.patterns.Resequencer

is the EIP endpoint that uses the resequencing algorithm. An example shows how to use the resequencer (resequencer-sample.zip), in addition to the unit tests.