[overlord-issues] [JBoss JIRA] (SRAMP-389) Performance issue in s-ramp client when using custom properties in query results

[Eric Wittmann (JIRA)]

Eric Wittmann created SRAMP-389:
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             Summary: Performance issue in s-ramp client when using custom properties in query results
                 Key: SRAMP-389
                 URL: https://issues.jboss.org/browse/SRAMP-389
             Project: S-RAMP
          Issue Type: Bug
      Security Level: Public (Everyone can see)
    Affects Versions: 0.4.0 - Tomcat Support
            Reporter: Eric Wittmann
            Assignee: David virgil naranjo
             Fix For: 0.5.0 - API Management


There is a feature in s-ramp queries where the client can request that each artifact returned by a query also include a specific subset of the artifact's custom properties.  This is in addition to the standard set of meta-data that is always returned when a query is performed.

We currently use this feature in the dtgov WorkflowQueryService class to return the 'query' and 'workflow' custom properties (so they can be displayed in the UI list).

Getting these custom properties while processing the result set is very slow (see ArtifactSummary::getCustomPropertyValue).  

I haven't actually verified this, but I *believe* the reason this is slow is because a new JAXB context is created for each ArtifactSummary in the query result list.  Creating a JAXB context is a heavy weight operation.

If this is truly the cause, we should try to share the JAXB context in some way.  We need to determine whether it is thread-safe, in which case we should have a single JAXB context (singleton).  If not, we should create it on a ThreadLocal.

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