Add retry filter support to the Java Remote RetryHandler

[jrmccluskey]

The current Remote Inference implementation lacks customizable retry support, e.g. it will always retry regardless of the returned exception from the service. Retry filter support will allow for respecting exceptions that are inherently not able to be retried.

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Summary of Changes

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This pull request enhances the Java Remote Inference 'RetryHandler' by introducing a customizable retry filter. This allows users to specify which exceptions are eligible for retries, preventing unnecessary attempts on errors that are inherently non-retryable. The change improves the robustness and efficiency of remote inference operations.

Highlights

• Retry Filter Implementation: Introduced a functional interface 'RetryFilter' to allow users to define custom logic for determining which exceptions should trigger a retry.
• RetryHandler Enhancement: Updated 'RetryHandler' to support the new 'RetryFilter', defaulting to retrying all exceptions, and added a fluent 'withRetryFilter' method for configuration.
• Test Coverage: Added a comprehensive test suite 'RetryHandlerTest' to verify default retry behavior and custom filtering logic.

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Code Review

This pull request introduces a RetryFilter functional interface to RetryHandler, allowing users to customize which exceptions should trigger a retry. It also includes comprehensive unit tests to verify the behavior of both default and custom retry filters. The review feedback suggests improving null safety by validating retryFilter during construction and adding a null check during execution to prevent issues with deserialized instances, as well as removing a redundant type cast.

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[jrmccluskey]

assign set of reviewers

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R: @chamikaramj for label java.

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