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Stream Processor Studio Overview

Owned by Former user (Deleted)
Last updated: May 14, 2020 by Former user (Deleted)
8 min read

The Stream Processor Studio is a developer tool that is shipped with WSO2 SP to develop Siddhi applications. It allows provides two interfaces to develop Siddhi applications

  • From source view: This allows you to write Siddhi applications in the Siddhi Query Language. This supports auto-completion, tracking syntax errors and debugging.
  • From design view:This interface visualizes the event flow of a Siddhi application, and allows you to compose the applications by dragging and dropping Siddhi components to a graph.

Once a Siddhi application is created, you can simulate events via the Stream Processor Studio to test whether it works as expected. You can also run the Siddhi application in the debug mode to detect errors in the Stream Processor logic.

Starting Stream Processor Studio

To start and access the Stream Processor Studio, follow the steps below:

  1. Start the Stream Processor Studio by issuing one of the following commands from the <SP_HOME>/bin directory.
    • For Windows: editor.bat
    • For Linux: ./editor.sh

  2. Access the Stream Processor Studio via the http://localhost:<Stream_Processor_Studio_PORT>/editor URL. The Stream Processor Studio opens as shown below.

    The default URL is http://localhost:9390/editor. If required, you can change the host name (i.e., localhost) or the web UI application name (i.e., editor). For instructions, see Changing the Host Name and Context Path of SP Web Applications.

Welcome Page

The  Welcome to the Stream Processor Studio Tour Guide is open by deault. You can take a tour by following the instructions on the dialog box, or close it and proceed to explore the Stream Processor Studio on your own. You can also access this dialog box by clicking Tools => Tour Guide. Once you close the dialog box, you can try the following:

  • New
    Click this to open a new untitled Siddhi file.

  • Open
    Click this to open a Siddhi file that is already saved in the workspace folder of the Stream Processor Studio. If the file is already opened in a new tab, clicking Open does not open it again. The default path to the workspace directory is <SP_Home>/wso2/editor/deployment.

  • Try out samples
    The pre-created samples provided out of the box are listed in this section. When you click on a sample, it opens in a new tab without a title.

  • More Samples
    Click this to view the complete list of samples in the samples directory. This allows you to access samples other than the ones hat are displayed by default is the Try out samples section. When you click on a sample, it opens in a new tab without a title.

  • Quick links
    This section provides links to more resources.

Menu items 

This section explains the options that are available in the File, Edit and Run menus.

File menu Items

The File menu includes the following options.

  • New
    Click this to open a new untitled Siddhi file. 
     
  • Open File
    Click this to open a Siddhi file that is already saved in the workspace directory of the Stream Processor Studio. If the file is already opened in a new tab, clicking this menu item does not open it again in another tab. The default path to the workspace directory is <SP_Home>/wso2/editor/deployment.

    When a Siddhi file is opened, its source view is displayed by default. 

    To view a design view where the elements of the Siddhi application are graphically represented, click Design View. 
    As a result, a graphical view of the Siddhi application is displayed as shown in the following example.

     
  • Import Sample
    Click this to import a sample from the samples diretory to a new tab. The sample opens in an untitled Siddhi file. Once you save it, it can be accessed from the workspace directory.
     
  • Save
    Click this to save an edited or new file to the workspace directory.
     
  • Save As
    Click this if you want to save an existing saved file with a different name. If you click this for an untitled Siddhi file, the normal save operation is executed (i.e., same operation carried out when you click Save).
     
  • Import File
    Click this to open a file from a system location. This file is opened in a new tab in the saved state with the same file name with which it is imported.
     
  • Export File
    Click this to export a saved file to a system location. This is only applicable to Siddhi application tabs that are in a saved state.

  • Export as Docker

    The exported Docker artifacts use docker-compose for this purpose. Therefore to run the artifacts, you need to install the following in the running environment.

    • Docker

    • Docker Compose


    Click this to export one or more selected Siddhi applications in a Docker container. Once you click on this menu item, the Export as Docker dialog box appears.

    Select the relevant check boxes to indicate which Siddhi files you need to export. If you select the check box for workspace, all the Siddhi applications in the workspace directory are exported.

    For detailed information, see Exporting Siddhi Files.

  • Close File
    Click this to close a currently active Siddhi application that is already open in a tab.
     
  • Close All Files
    Click this to close all the Siddhi files that are currently open.
     
  • Delete File
    Click this to delete the currently active Siddhi file from the workspace directory. Only Siddhi files that are already saved can be deleted.
     
  • Settings
    Click this to change the theme and the font size used in the Stream Processor Studio. The default theme is Twilight.

Edit menu Items

The Edit menu includes the following options.


  • Undo
    Click this to undo the last edit made to the Siddhi application that you are currently editing. Only unsaved edits can be undone.
     
  • Redo
    Click this to redo the edit that was last undone in the Siddhi application that you are currently editing. The redo operation can be carried out only if you have not saved the Siddhi application after you undid the change.
     
  • Find
    Click this to search for a specific string in the currently active Siddhi application tab.
     
  • Find and Replace
    Click this to search for a specific string in the currently active Siddhi application tab, and replace it with another string.
     

  • Reformat Code
    Click this to reformat the Siddhi queries in the Siddhi application you are currently creating/editing in the source view.

    This menu option is only visible when you are working in the source view.

  • Auto-Align
    Click this to horizontally align all the Siddhi components in a Siddhi application that you are creating/editing in the design view.

    This menu option is only visible when you are working in the design view.


Run menu Items

The Run menu includes the following options.

  • Run
    Click this to start the Siddhi application in the Run mode. Only saved Siddhi applications can be run.

    This menu option is enabled only when a Siddhi application is being created/edited in the source view.

  • Debug
    Click this to start the Siddhi application in the Debug mode. Only saved Siddhi applications can be run in this mode.

    This menu option is enabled only when a Siddhi application is being created/edited in the source view.

  • Stop
    Click this to stop a Siddhi application that is already started in either the Run or Debug mode.


Tools menu items

The Tools menu provides access to the following tools that are shipped with the Stream Processor Studio.

  • File Explorer
    The file explorer. This is also avaible in the Side Panel.
  • Event Simulator

    Simulation can be carried out in two ways:

    • Single Simulation
    • Feed Simulation

    For detailed information about event simulation, see Simulating Events.
    The event simulator can also be accessed from the Side Panel.

  • Console 
    This is an output console that provides feedback on various user activities carried out on the Stream Processor Studio. It is accesible from the Side Panel.
  • Sample Event Generator
    This opens the Sample Event Generator as follows.

    Here, you can generate sample events for a selected stream within a selected Siddhi application in a specified format.

  • Siddhi Store Query
    This opens the Siddhi Store Query dialog box.

    Here, you can select a Siddhi application, and then enter a query to manipulate the store in which that Siddhi Application saves data. You can enter queries that can update record, insert/update records, retrieve records and delete records. For more information about actions you can carry out for stores, see Managing Stored Data via REST APIs.

  • Tour Guide
    This opens a dialog box named Welcome to the Stream Processor Studio Tour Guide which guides you to understand Stream Processor Studio. When you start the Stream Processor Studio and access it, this dialog box is open by default.

Deploy menu items

The Deploy menu has the following option to select one or more Siddhi applications and deploy them to one or more WSO2 SP servers. For more information, see Deploying Streaming Applications.

Side Panel

File Explorer 

This provides a view of all the files saved as shown in the example above. 

Event Simulator

Simulation can be carried out in two ways:

  • Single Simulation
  • Feed Simulation

For detailed information about event simulation, see Simulating Events.

Output Console

This provides feedback on various user activities carried out on the Stream Processor Studio. 

Operator Finder

Click the Operator Finder icon to search for the Siddhi extensions that you want to use in your Siddhi applications.

  • For the complete list of Siddhi extensions that you can search for via the Operator Finder, see Siddhi Extensions.
  • For detailed instructions to find and use a Siddhi extension via the Operator Finder demonstrated with an example, see Creating a Siddhi Application.

Toolbar

  • Run icon
    Click this to start a currently open Siddhi application in the Run mode. This icon is enabled only for saved Siddhi applications.
     
  • Debug icon
    Click this to start a currently open Siddhi application in the Debug mode. This icon is enabled only for saved Siddhi applications.
     
  • Stop icon
    Click this to stop a Siddhi application that is currently running in either the Run or Debug mode.
     
  • Revert icon
    Click this to revert the unsaved changes in the Siddhi application that is currently being created/edited. 

  


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