java: make telemetry optional

[mathieu1fb]

Features;

Telemetry is now optional for the IoT3 Core and Mobility SDKs.

Closes #235

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How to test

1. Clone the its-client project on your IDE.
2. Ensure that you have Gradle to be able to build the java/iot3 modules (core, mobility and examples).
3. Find the Iot3MobilityBootstrapExample class in the examples module, and set appropriate values for the following fields:

private static final String EXAMPLE_UUID = "uuid";
private static final String EXAMPLE_CONTEXT = "context";
// Bootstrap parameters
private static final String BOOTSTRAP_ID = "bootstrap_id";
private static final String BOOTSTRAP_LOGIN = "boostrap_login";
private static final String BOOTSTRAP_PASSWORD = "bootstrap_password";
private static final BootstrapHelper.Role BOOTSTRAP_ROLE = BootstrapHelper.Role.EXTERNAL_APP;
private static final String BOOTSTRAP_URI = "bootstrap.uri.com";
private static final boolean ENABLE_TELEMETRY = false; // enable or disable telemetry here

4. Run Iot3MobilityBootstrapExample.

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Expected results:

1. On the console, you should see the following:

Bootstrap success
IoT3 ID: <id>
LOGIN: <login>
PASSWORD: <password>
MQTT URI: <mqtt_uri>
TELEMETRY URI: <open_telemetry_uri>

2. On the console, you should then see that the MQTT connection has been established successfully and that mobility messages are being published and received periodically (CAM, CPM and DENM).
3. On Jaeger, you should see that telemetry is only being reported when ENABLE_TELEMETRY is set to true.

[fredOG-2A1]

Seems good to me

[fredOG-2A1]

Just one remark.
I tried to launch with Intellij the Iot3MobilityBootstrapExample class in a wrong manner. Without modifying the final String BOOTSTRAP_URI = "bootstrap.uri.com (lines 37 to 45) it gives me this error:
Process 'command 'C:/Users/fyoj6494/.jdks/corretto-17.0.13/bin/java.exe'' finished with non-zero exit value 1

This message isn't very clear.
Debugging the execution, I see that there is a missing caught exception in BootstrapHelper line 78.
If we modify this line to "catch (IllegalArgumentException | InterruptedException | URISyntaxException | IOException exception)" ie adding IllegalArgumentException, the final message is:
Bootstrap error: java.lang.IllegalArgumentException: URI with undefined scheme
Now, the message is meaningful.

What do you think?

[fredOG-2A1]

By the way, what about Jaeger.
Do you have an url? How can I check or play with Jaeger?

[mathieu1fb]

Just one remark. I tried to launch with Intellij the Iot3MobilityBootstrapExample class in a wrong manner. Without modifying the final String BOOTSTRAP_URI = "bootstrap.uri.com (lines 37 to 45) it gives me this error: Process 'command 'C:/Users/fyoj6494/.jdks/corretto-17.0.13/bin/java.exe'' finished with non-zero exit value 1

This message isn't very clear. Debugging the execution, I see that there is a missing caught exception in BootstrapHelper line 78. If we modify this line to "catch (IllegalArgumentException | InterruptedException | URISyntaxException | IOException exception)" ie adding IllegalArgumentException, the final message is: Bootstrap error: java.lang.IllegalArgumentException: URI with undefined scheme Now, the message is meaningful.

What do you think?

Thanks for "catching" that ;) I'll correct it!