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[FAQ] Example BVMS SDK scriplet to receive and react on server events

Question

Is there a script example to implement event receiver in BVMS SDK scriplet?


System overview:

  • BVMS

Expected result:

Control Operator Client, whenever a Virtual Input changes state (either ON->OFF or vice-versa).

Example:

  • When Virtual Input (any) is open- some action follows in Op Client
    OR

  • When Virtual Input (any) is closed, some action follows


Answer

Concept for you to use:

  • In BVMS OC use scriplet, that registers for Events (ex. Virtual Input)

  • filter the events and reacts (changes the layout, calls a Favorite, etc.) on particular event

Please find below an example of script that can be used:

// ScriptType: ClientScript

// ScriptLanguage: CS

using System;
using System.Diagnostics;
using System.Collections.Generic;
using log4net;
using Bosch.Vms.Core;
using Bosch.Vms.SDK;

[BvmsScriptClass()]
public class ClientScript : IDisposable
{
    private readonly IClientApi Api;
    private readonly ILog Logger;  
    Guid almId_global;
    private EventReceiver myEventRecWS;  
    RemoteServerApi RSApi;


// then declare the EventReceiver class

        
    private class MyEventRecieverWS : EventReceiver
    {
        private IClientApi myApi;
        public MyEventRecieverWS(IClientApi api)
        {
            myApi = api;
        }
    
        
        public override void OnEvent(EventData ed)
        {

        //
            //if((ed.Type=="InputState") && (ed.DeviceName=="Virtual Input 1"))
            // this is just example with the Type of the event. One could also include the Device name - (ed.DeviceName=="Virtual Input 1") and so on
            if((ed.Type=="InputState"))
            {
                //if the VI is open
                if(ed.State.IsValid == true)
                    myApi.ContentManager.ResetMonitor(1);
                
                    //add an action here for example
                    /*
                    myApi.ContentManager.ResetMonitor(1);
                    myApi.ContentManager.SetGranularity(1,2);

                    ImagePane ipPane1 = new ImagePane(1, 1);
                    cCam111 = myApi.CameraManager.GetCameraByLogicalNumber(4);
                    DateTime timestamp1 = myApi.ContentManager.GetCurrentTimeStamp(ipPane1);
                    myApi.ContentManager.DisplayCamera(ipPane1, cCam4);
                    
                    */
                if(ed.State.IsValid == false)
                    myApi.ContentManager.ResetMonitor(1);
                    //add an action here for example
                
            }
            
        }
        
    }

    public ClientScript(IClientApi api)
    {
        this.Logger = LogManager.GetLogger("ClientScript");
        this.Api = api;        
    }

      [Scriptlet("f52c4b76-9b1d-4fd2-abb4-617249d3fe7f")]
    public void ReactOnEvent()
    {
         // Should be called only as sart up script!!! There is restriction of the numbers of event/alarm receivers per system //
        System.Threading.Thread.Sleep(2000);
        try
        {
            myEventRecWS = new MyEventRecieverWS(Api);
        }
            catch (Exception mye)
            {
            Api.ApplicationManager.ShowMessage(mye.Message + "Couldn't create event reciever");

            }
            try
            { // here use the IP of the BVMS server and the corresponding credentials valid for the current BVMS OC user
                RSApi = new RemoteServerApi ("172.16.50.79:5390", "Admin", "" );
                //Api.ApplicationManager.ShowMessage("connected to server");
            }
            catch (Exception mye)
            {
                Api.ApplicationManager.ShowMessage(mye.Message + "Couldn't connect to server");

            }
        try
        {
            RSApi.EventManager.Register(myEventRecWS);
            //Api.ApplicationManager.ShowMessage("registered receiver");

        }
        catch (Exception mye)
        {
            Api.ApplicationManager.ShowMessage(mye.Message + "Couldn't register");
        }
        // unregister is made automatically for client scripts when the operator logs off

    }


Note: This is simplified and generalized example, that could be helpful in building a particular tailored script.  

(information) Info:

Q: What is the maximum number of receivers?

A: There is no hard limit, but one should take into the account the size of the installation and the expected server load.