Page History

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• • Service Instance Rendering and Detail Widget
    • Capabilities
      • Get a process definition XML through the Service Id and Process instance association.
      • use Camunda REST API, GET /process-defintion/{id}/xml
      • Get the state of a process instance from the activity-instances
      • Use Camunda REST API, get/process-instance/{id}/activity-instances
      • Render the BPMN XML with bpmn.io and places markers on top of it, and provide Service instance detail views.
    • Design
      • This widget will be on the secondary/pop-up browser page. 
        • The Service List page will be the primiary page, so the user can open multiple Service Instance Rendering and Detail pages.
        • The number of pages can be limited to the default 10, but it can be configured.
      • The search criteria fields are for display only, and they cannot be changed.
      • The Detail panel is scrollable and display contents with the tag: value formt.
      • Query a process instance with the matched 'serviceInstanceId' process variable.
        • get a process instande id: query bases on the process variable, 
          • GET /history/variable-instance/{variableValue}, where {variableValue} = 'serviceIntanceId' ;
        • query BPML XML based on a process instance id
          • GET /process-definition/{id}/xml
        • query the process instance detail such as process variables
          • GET /process-instance/{id}/variables
          • Display the process variables on the Service Instance Detail panel
        • query and activity instance (tree) for the process instance id
          • GET /process-instance/{id}/activity-instances
          • GET /history/activity-instance/{id}/activity-instances
          • The response provides child activity instance info. By using this we can find the parent and child process instnce id and definition id.
            • If the current process instance id has its parent, enable the Drill-Up button.
          • When a user clicks on a task, display the task varables
            • GET /task/{id}variables
            • When the task activity type is call activity, it enables the Drill-Down button.
      • Render the process instance diagram with the retrieved XML.

        • use bpmn.io javascript library for the XML rendering and event attachments for process instance tasks.

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• REST APIs for providing data to UIs
  • Capabilities
    • Provides REST services, by utilzing 1) Camunda REST APIs, such as BPMN XML string, process activity data, process variable, statistic, and 2) SO Request DB APIs for a service list.
    • Consolidate data responses from multpile multple Camunda calls (both from process and history database) and feed them to UIs.
    • Use of HistoryService APIs, example, processEngine.getHistoryService().createHistoricProcessVariableQuery().xyz
    • Set a History level to ACTIVITY as a minimum; AUDIT (default) level for process variable tracing
    • Provides workflow tracing (between parent-child workflows, interaction with other services; service task in and out); example,
      • processEngine.getRuntimeService().createExecutionQuery().processVariableValueEquals("serviceInstanceId", serviceInstanceId).singleResult();
    • Custom Query
      • Custom Query against History ACT_HI_DETAIL database table, as needed
    • Create a REST API, getServiceList with search criteria
      • Enhance MsoRequestsDbAdapter and MsoRequestsDbAdapterImpl to implement getInfraRequest(...) with additional parameters
      • invoke getInfraRequest(...) to collect service list data based on search criteria.
  • Design
    • Write REST APIs 
      • getServiceList(...) invokes new getInfraRequest(...)
      • getProcessInstanceId(String serviceInstanceId);
      • getprocessDiagram(String processInstanceId); getProcessDiagram(String serviceInstanceId);
      • getprocessInstanceDetail(String processInstanceId); getProcessInstanceDetail(String serviceInstanceId);
      • getProcessInstanceActivity(String processInstanceId); getProcessInstanceActivity(String serviceInstanceId);
      • getProcessTaskDetail(String taskId);
      • getProcessTaskType(String taskid);

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