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From "Supun Kamburugamuva (JIRA)" <j...@apache.org>
Subject [jira] Created: (SYNAPSE-608) Priority based mediation
Date Wed, 10 Feb 2010 05:16:28 GMT
Priority based mediation
------------------------

                 Key: SYNAPSE-608
                 URL: https://issues.apache.org/jira/browse/SYNAPSE-608
             Project: Synapse
          Issue Type: New Feature
            Reporter: Supun Kamburugamuva


Priority based mediation allows users to execute sequences with a given priority. This is
important when there is a high volume of traffic going through synapse which require different
processing capabilities. 

First I'll explain the problem.

Lets assume we have two types of messages coming in to the ESB. One type of message(P1) is
very important and other type(P2) is not that important. User can afford to loose some of
the P2 messages occasionally. Load characteristics of both messages change over time. Some
time lots of P1 and few P2 messages can come. Sometimes lots of P2 messages with few P2 messages
can come. Sometimes lots of P1 and P2 messages can come.

In all these scenarios synapse should be able to guarantee the processing of P1 messages,
even if it loose some P2 messages.

To get this functionality in to ESB, we have implemented this feature in to synapse at two
different levels. They are at HTTP transport level and mediation level.  

In the mediation level user can filter the messages using normal synapse capabilities for
determining the priority and execute a sequence with a given priority. 

In the transport level there is a configuration to determine the priority from HTTP properties
and execute the sequences accordingly.

This feature is totally optional.


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