[teiid-issues] [JBoss JIRA] (TEIID-2148) Add enhancements to more efficiently handle large documents/files

[Steven Hawkins (JIRA)]

     [ https://issues.jboss.org/browse/TEIID-2148?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steven Hawkins resolved TEIID-2148.
-----------------------------------

    Resolution: Done


Changed the WS SOAP logic to use STaX, which will be returned as a stream from CXF.  Also expanding save on read to STaXSource, and added "stream" parameters to invoke and invokeHttp.  Since they are nullable, this will not affect existing invocations.  If stream is true, then the procedure will return a value that by-passes the save on read logic and therefore can only be used once.
                
> Add enhancements to more efficiently handle large documents/files
> -----------------------------------------------------------------
>
>                 Key: TEIID-2148
>                 URL: https://issues.jboss.org/browse/TEIID-2148
>             Project: Teiid
>          Issue Type: Enhancement
>          Components: Query Engine
>            Reporter: Steven Hawkins
>            Assignee: Steven Hawkins
>             Fix For: 8.2
>
>
> The default strategy of Teiid is to copy the inputstream sent back from CXF (or anything returning a Source/DataSource).  To reduce latency this copy should be performed during read, rather than all at once.
> Ideally we should investigate the CXF internals to see if we can get a handle to a temp file, which would completely eliminate the need for a copy.  Alternatively or in addition to this approach, the ws translator should offer an option to return a single use SQL/XML value to the engine.

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