Andrew Cox created THRIFT-1708:
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             Summary: Add event handlers for processor events
                 Key: THRIFT-1708
                 URL: https://issues.apache.org/jira/browse/THRIFT-1708
             Project: Thrift
          Issue Type: New Feature
          Components: Java - Library
    Affects Versions: 0.9
         Environment: all
            Reporter: Andrew Cox
            Assignee: Andrew Cox
            Priority: Minor
             Fix For: 0.9
         Attachments: thrift-1708-processor-event-handlers.patch

Integrates some code we've been using (here at facebook) to add event handlers 
that can handle processor events with the server event handlers in apache 
thrift.

Processor events include: preRead (before reading arguments), postRead (after 
reading arguments), preWrite (before writing results), postWrite (after writing 
results), and processorError (when a non-IDL exception is thrown as a result of 
an error handling the request). The processor handler is given the method name 
and input and output protocol that will be used to process the request, and can 
inspect arguments on postRead, and results on pre/postWrite events.

This change also enables event handlers for non-blocking servers.

Some unit tests are included to exercise the new processor event handlers, and 
demonstrate how they can connect with server event handlers.

It also fixes a minor bug I found while testing, where FrameBuffers on 
non-blocking servers could have been close()'d more than once.

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