JSON to Tuple and Tuple to JSON Operator Sample

Contents

Introduction
Running the Sample in StreamBase Studio
Importing This Sample into StreamBase Studio
Sample Location

This sample shows how to use the TIBCO StreamBase® JSON to Tuple and Tuple to JSON operators.

Introduction

See the description of the operators' Properties views in Using the JSON to Tuple Operator and Using the Tuple to JSON Operator.

The sample application illustrate the use of the JSON to Tuple and Tuple to JSON operators. In this sample, the operator takes an input tuple and produces a JSON string, it then takes that string and produces a tuple. The sample is setup with a schema to try out various data types converting from tuples to JSON strings and back.

Running the Sample in StreamBase Studio

  1. In the Package Explorer view, in project sample_JSONTuple, double-click to open the Sample.sbapp application.

  2. With the Sample.sbapp application selected and active, click the Run button. This opens the SB Test/Debug perspective and starts the application.

  3. In the Manual Input view, select the TestInput stream and enter some values then click Send Data.

  4. In the Application Output view, observe a tuple dequeued on the JSONOutput and TupleOutput streams.

  5. Experiment by entering other values in the fields of the TestInput stream, clicking Send Data, and observing the resulting output tuples.

  6. When done, press F9 or click the Stop Running Application button.

Importing This Sample into StreamBase Studio

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

  • From the top menu, click File → Load StreamBase Sample.

  • Select JSONTuple from the Data Constructs and Operators category.

  • Click OK.

StreamBase Studio creates a single project for the operator samples.

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.

Important

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 the permission problems that can occur when trying to work with the initially installed location of the sample. The default workspace location for this sample is: 

studio-workspace/sample_JSONTuple

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

In the default TIBCO StreamBase installation, this sample's files are initially installed in: 

streambase-install-dir/sample/JSONTuple

See Default Installation Directories for the location of streambase-install-dir on your system. This location may require administrator privileges for write access, depending on your platform.