Query Service is the entry point for the BP Server client library for retrieving bulk data related to user's tasks and process instances created by users. The library has to be initialized once for each JVM, and cleaned up before the shutdown of the JVM.
You can add filtering conditions to the query to reduce the amount of data to be retrieved. Query Service can optionally pass filters that contain:
Additional conditions
Sort order of the retrieved data
Additional column containing dataslots to be retrieved
The size of the data to be retrieved
If the data size is not specified, then it is equal to the size of the retrieved ResultSet.
Note: BP Server client library is a read-only library and should not be used for updating the workflow data. You can use the BP Server for updating the workflow, process template, metadata, and dataslot metadata.
BP Server Smart Value Objects (SVO) for WorkItem, WorkStepInstance and ProcessInstance can be retrieved directly from the QSResult.
Every user obtains the QueryService handle by passing a valid BP Server session object. The BP Server session object is necessary to communicate with the BP Server using the SVO obtained from the QueryService. When a user gets a new session, setSession is invoked.
The Table 8 describes the classes provided by Query Service.
Additional conditions
