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The Content Enricher tells us how we can deal with situations where our message is missing required data items. The Content Filter lets us remove uninteresting data items from a message. Sometimes, we want to remove fields only temporarily. For example, a message may contain a set of data items that may be needed later in the message flow, but that are not necessary for all intermediate processing steps. We may not want to carry all this information through each processing step because it may cause performance degradation and makes debugging harder because we carry so much extra data.

How can we reduce the data volume of message sent across the system without sacrificing information content?

Store message data in a persistent store and pass a Claim Check to subsequent components. These components can use the Claim Check to retrieve the stored information.

The Claim Check pattern consists of the following steps:

Related patterns: Content Filter, Content Enricher

Find the full description of this pattern in: Enterprise Integration Patterns Gregor Hohpe and Bobby Woolf ISBN 0321200683 650 pages Addison-Wesley

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