Performing Regression Tasks via an Imported Tensorflow Model¶

Purpose¶

This application demonstrates how to import a pretrained Tensorflow model WSO2 Streaming Integrator to perform a regression task.

Prerequisites¶

Replace {SI_HOME} with absolute path to the Streaming Integrator Tooling home directory.
Save this sample.
If there is no syntax error, the following message is shown on the console:
```
* Siddhi App TensorFlowTestApp successfully deployed.
```

Executing the Sample¶

Start the Siddhi application by clicking on 'Run'.
If the Siddhi application starts successfully, the following messages are shown on the console:
```
* TensorFlowTestApp.siddhi - Started Successfully!
```

Testing the Sample¶

Send events through one or more of the following methods.

Send events to `ProductionInputStream`, via event simulator¶

Open the event simulator by clicking on the second icon or pressing Ctrl+Shift+I.
In the Single Simulation tab of the panel, specify the values as follows:
- Siddhi App Name: TensorFlowTestApp
- Stream Name: InputStream
In the x field, enter the following and then click Send to send the event.
```
x: "double:[1,-2]"
```
Send some more events.

Send events to the simulator HTTP endpoint through the curl command¶

Open a new terminal and issue the following command:

curl -X POST \
    http://localhost:9390/simulation/single \
    -H 'content-type: text/plain' \
    -d '{"streamName": "InputStream", "siddhiAppName": "TensorFlowTestApp","data": ["double:[1,-2]"]}'

If there is no error, the following messages are shown on the terminal:

{"status":"OK","message":"Single Event simulation started successfully"}

Publish events with Postman¶

Install 'Postman' application from Chrome web store.
Launch the application.
Make a 'Post' request to the 'http://localhost:9390/simulation/single' endpoint. Set the Content-Type to 'text/plain' and set the request body in text as follows:
```
{"streamName": "InputStream", "siddhiAppName": "TensorFlowTestApp","data": ['double:[1,-2]']}
```
Click 'send'. If there is no error, the following messages are shown on the console:
```
"status": "OK",
"message": "Single Event simulation started successfully"
```

Viewing the Results¶

See the output on the terminal.

@App:name("TensorFlowTestApp")


define stream InputStream (x string);

@sink(type='log')
define stream OutputStream (outputPoint0 double, outputPoint1 double);

@info(name = 'query1')
from InputStream#tensorFlow:predict('{SI_HOME}/samples/artifacts/TensorflowSample/Regression', 'inputPoint', 'outputPoint', x)
select outputPoint0, outputPoint1
insert into OutputStream;