Logging flow steps

Logging is enabled using the FlowLogger object.

The HPSearch Engine also starts a Web Service Endpoint for querying available flow Ids and their corresponding logs. The service is available at http://host:port/FlowLogger.

• getFlowIds: Returns a list of currently running flows
• getLog: Returns the Logged entries for the specified flow
  • The format is [TIMESTAMP]:ENTRY

Notes:

• If a flow is complete, it is automatically committed (saved in the HPSEARCH_HOME/flowLog folder)
• Usually every flow log is identified with the flow ID which is a 128-bit UUID. If a particular flow log exists and commit is sought on a flow with an identical flowID, then the new entries are appended to the original log.
• Flows deployed through HPSearch flow system store general logs about flow status. Additional steps can be added by a specific application.
• Currently the flow only stores the timestamp and the flow entry.

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