Add GitHub workflow and Update dependency

[alikemalocalan]

Description of change

This PR includes Maven project configuration improvements, a migration to Java's built-in HTTP client, and a packaging surface change for example classes.

What changed

1. Runtime HTTP client migration: Replaced Apache HttpClient with java.net.http.HttpClient for all network calls to Stitch.
2. Build/release configuration:
   • Updated build/release plugin setup in pom.xml (source, javadoc, GPG signing, Nexus staging, and release flow).
   • Refined publishing-related configuration for OSSRH deployment.
   • Updated/maintained dependency and plugin versions.
3. Examples relocation (artifact surface change):
   • Removed com.stitchdata.client.examples.* classes from src/main.
   • Moved examples to test sources (src/test) so they are no longer part of the published runtime artifact.

Why

• HTTP client migration: Simplifies dependencies by using Java's built-in HTTP client (available since Java 11), reducing external dependency footprint and improving maintainability.
• Configuration updates: Improve release reliability and maintainability of the Java Stitch Client build pipeline.
• Examples relocation: Keeps shipped production artifacts focused on runtime client code while retaining executable usage examples in tests.

Runtime behavior changes

This change modifies runtime HTTP behavior including:

• TLS/SSL defaults and cipher suite handling.
• HTTP redirect handling semantics.
• Connection timeout and retry behavior.
• Header processing and validation.
• Potential differences in error handling and edge cases.

Published artifact changes

• com.stitchdata.client.examples.* classes are no longer shipped in the main artifact.
• This is a breaking change for any consumers that imported those example classes directly.

QA steps

• automated tests passing
• manual qa steps passing (list below)

Manual QA steps:

1. Run a clean build and verify packaging succeeds.
2. Run the full test suite and confirm all tests pass.
3. Verify source and javadoc artifacts are generated.
4. Verify release-related Maven configuration is resolved correctly (without performing an actual production release).
5. Integration testing: Test HTTP connectivity and batch submissions to verify the new HTTP client behaves correctly with Stitch API endpoints.
6. Artifact check: Confirm com.stitchdata.client.examples.* is absent from the published runtime JAR and examples remain available in test sources/docs.

Risks

• HTTP client behavior differences: Switching HTTP clients may expose edge cases or behavioral differences in TLS negotiation, redirects, timeouts, or error handling.
• Breaking change for affected consumers: Downstream code that references com.stitchdata.client.examples.* from the published artifact will fail to compile until migrated.
• Release/publish workflow risk: misconfiguration could affect artifact signing or staging.
• Build-time compatibility risk: plugin version changes may behave differently across local/CI environments.
• Integration risk: Network communication changes must be validated against actual Stitch API.

Rollback steps

• Revert this branch.
• Re-run CI to confirm previous build and HTTP behavior is restored.

[spendito-peter]

@psantacl @cmerrick @mdelaurentis

Would it be possible for you to review this request? Due to severe vulnerabilities a release with updated dependencies would be very desirable.

Thank You!

@alikemalocalan fyi

[Copilot]

Pull request overview

This PR modernizes the project’s build/release setup (Maven plugins, Java level, dependencies) and adds GitHub automation, while also updating the client implementation to use Java 11’s java.net.http.HttpClient and Jakarta JSON.

Changes:

• Update pom.xml for Java 11, newer Maven release/publish plugins, and dependency refresh (including removing Apache HttpClient in favor of JDK HTTP client).
• Add GitHub Actions CI workflows and Dependabot configuration for Maven dependencies.
• Replace previously “example” main classes with JUnit tests that exercise the same flows; add a test asserting HTTP/1.1 usage.

Reviewed changes

Copilot reviewed 14 out of 14 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
src/main/java/com/stitchdata/client/StitchClient.java	Switch HTTP transport to java.net.http.HttpClient, update JSON parsing, add helper for JSON content-type detection.
src/main/java/com/stitchdata/client/StitchResponse.java	Migrate JSON type to jakarta.json.JsonObject.
src/main/java/com/stitchdata/client/StitchClientBuilder.java	Formatting/type tweaks around Transit write handlers and builder build() formatting.
src/main/java/com/stitchdata/client/Buffer.java	Import cleanup and formatting-only changes.
src/test/java/com/stitchdata/client/StitchClientTest.java	Import cleanup/formatting; add test asserting client uses HTTP/1.1.
src/test/java/com/stitchdata/client/BufferTest.java	Import cleanup/formatting.
src/test/java/com/stitchdata/client/SimpleExampleTest.java	New test replacing the removed “simple example” main program flow.
src/test/java/com/stitchdata/client/CallbackExampleTest.java	New test replacing the removed “callback example” main program flow.
src/main/java/com/stitchdata/client/examples/SimpleExample.java	Removed example main program (superseded by tests).
src/main/java/com/stitchdata/client/examples/CallbackExample.java	Removed example main program (superseded by tests).
pom.xml	Update compiler level to 11; update Maven plugins; refresh dependencies (Transit, Jakarta JSON, JUnit), remove Apache HttpClient dependency.
.github/workflows/maven.yml	New Maven build workflow (currently restricted to master).
.github/workflows/maven-unit-tests.yml	New unit test workflow for Java 11/17 (currently push only).
.github/dependabot.yml	New Dependabot configuration for Maven.

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[Copilot]

Pull request overview

Copilot reviewed 15 out of 15 changed files in this pull request and generated 6 comments.

[Copilot]

Pull request overview

Copilot reviewed 15 out of 15 changed files in this pull request and generated 5 comments.

[Copilot]

Pull request overview

Copilot reviewed 15 out of 15 changed files in this pull request and generated 8 comments.

[alikemalocalan]

@sgandhi1311

Would it be possible for you to review this request by yourself? Because Copilot reviewer find small unnecessary typos every time.

Thank You!