[5.0] Adding methods to Request

[Remy Maucherat]

Hi,

In order to fix some GC problems in StandardPipeline and StandardWrapper, where they allocate some context objects (for the first, it means 3 objects / request, for the second, one complex object / request), I need to add methods to the Request interface:
- get/setFilterChain
- get/setValveContext

This ties the contexts to the Request, which itself is thread safe, so the objects can be reused. It will not break compatibility with any existing module. This removes two hotspots, as well as improves GC :)

When the security manager is enabled, the filter chain will not be reused, to prevent possible exploits.

IMO, this change should not be ported to the 4.1.x branch.

Comments ?

Remy


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