`StreamingDataSourceBuilder` and filtering keys and segments

[js-commit]

Is your feature request related to a problem? Please describe.
Can you please provide an example on how to use the StreamingDataSourceBuilder filter? I've tried passing in a single flag ID, and I've noticed that the filtering does not work. Perhaps there is some syntax in how you properly use it, and it's not clear in any of the documentation.

Describe the solution you'd like

• An example on how to properly use the filter query parameter.

Additional context
The idea behind using a filter is to ensure that the service only listens to changes that it really cares about and resource usage when there are many flags.

[louis-launchdarkly]

Hello @js-commit, thank you for asking - the way that payload filtering (a beta feature) works is by creating the filter in LaunchDarkly UI, and having the SDK refer to the filter key. It doesn't work by specifying a flag key.

The functionality was added to the SDK in version 6.1.0, which enabled the ability to pass the payload filter key to the data source builder: https://launchdarkly.github.io/java-server-sdk/com/launchdarkly/sdk/server/integrations/StreamingDataSourceBuilder.html#payloadFilter

Please reach out to your account representative or file a support ticket to sign up for the beta.