Improve Synapse Memory Footprint under HTTP 1.0
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Key: SYNAPSE-408
URL: https://issues.apache.org/jira/browse/SYNAPSE-408
Project: Synapse
Issue Type: Improvement
Reporter: Saliya Ekanayake
Synapse serializes the SOAP envelope in order to calculate the content length
of the message under HTTP 1.0. This serialization is done inside the class
Axis2HttpRequest which is inside the transports module. The serialized bytes
are then stored in the message context for future use by the
streamMessageContents() method inside the same class.
Thus, the entire content of the SOAP envelope is stored inside the memory
leading to a possible out of memory situation when the XML data is large. A
solution to this would be to write some of the data to a permanent storage
(like hard disk) based on a threshold value. The TemporaryData class inside the
core module is a good solution to this kind of work. It would, however, incur a
cyclic dependency if used inside the Axis2HttpRequest class.
If we can resolve this issue (probably by moving the TemporaryData class to a
utility module and then making the core too depend on that) it will of great
use in improving the memory footprint of Synapse.
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