File Monitor Input Adapter Sample

About This Sample

This adapter sample illustrates the use of the Spotfire Streaming File Monitor Adapter, which watches a directory or specific file for changes and emits tuples that describe file system changes as they occur.

Importing This Sample into StreamBase Studio

In StreamBase Studio, import this sample with the following steps:

  • From the top-level menu, select File>Import Samples and Community Content.

  • Enter filem to narrow the list of options.

  • Select File monitor input adapter from the StreamBase Standard Adapters category.

  • Click Import Now.

StreamBase Studio creates a single project containing the sample files.

Running This Sample in StreamBase Studio

  1. In the Project Explorer view, open the sample you just loaded.

    If you see red marks on a project folder, wait a moment for the project to load its features.

    If the red marks do not resolve themselves after a minute, select the project, right-click, and select Maven>Update Project from the context menu.

  2. Open the src/main/eventflow/packageName folder.

  3. Open the filemonitor.sbapp file and click the Run button. This opens the SB Test/Debug perspective and starts the module.

  4. By default the file monitor sample is set up to monitor your Java temp directory. If you want to monitor another folder:

    In the Manual Input view, select the Control stream.

    Enter a path for path, and true for the remaining fields and click Send Data.

  5. In the Output Streams view, observe tuples emitted on the FileMonitorStatus output stream

  6. Use a command window or file system tool to modify the folders and files inside the TestFolder or add and delete other files and folders. Observe the content of tuples emitted on the FileNotifications output stream.

  7. Press F9 or click the Terminate EventFlow Fragment button.

Sample Location

When you load the sample into StreamBase® Studio, Studio copies the sample project's files to your Studio workspace, which is normally part of your home directory, with full access rights.


Load this sample in StreamBase® Studio, and thereafter use the Studio workspace copy of the sample to run and test it, even when running from the command prompt.

Using the workspace copy of the sample avoids permission problems. The default workspace location for this sample is:


See Default Installation Directories for the default location of studio-workspace on your system.