Add support for calls to HTTP endpoints

[bachuv]

Issue describing the changes in this PR

Adds support for Calls to HTTP endpoints to the Java SDK.

Pull request checklist

• My changes do not require documentation changes
  • Otherwise: Documentation issue linked to PR
• My changes are added to the CHANGELOG.md
• I have added all required tests (Unit tests, E2E tests)

[Copilot]

Pull request overview

Adds first-class Durable Functions “durable HTTP” support to the Java SDK by introducing request/response models, retry/auth configuration, and orchestration helpers, along with unit and end-to-end coverage.

Changes:

• Introduces DurableHttp APIs and supporting models (DurableHttpRequest/Response, retry options, token sources) in the core client SDK.
• Adds unit tests validating JSON wire compatibility (TimeSpan formatting, managed identity options, retry options, request/response serialization).
• Adds an Azure Functions E2E function + test, and centralizes JUnit dependencies at the root Gradle level.

Reviewed changes

Copilot reviewed 23 out of 24 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
samples-azure-functions/build.gradle	Removes per-module JUnit deps (now provided centrally).
endtoendtests/src/test/java/com/functions/EndToEndTests.java	Adds E2E test for durable HTTP orchestration.
endtoendtests/src/main/java/com/functions/CallHttpFunction.java	Adds Functions endpoints/orchestrator that performs a durable HTTP GET.
endtoendtests/build.gradle	Removes per-module JUnit deps (now provided centrally).
client/src/test/java/com/microsoft/durabletask/TimeSpanHelperTest.java	Adds unit tests for .NET TimeSpan ↔ Java Duration conversion.
client/src/test/java/com/microsoft/durabletask/ManagedIdentityTokenSourceTest.java	Adds unit tests for managed identity token source behavior/JSON.
client/src/test/java/com/microsoft/durabletask/ManagedIdentityOptionsTest.java	Adds unit tests for managed identity options JSON shape.
client/src/test/java/com/microsoft/durabletask/HttpRetryOptionsTest.java	Adds unit tests for HTTP retry options behavior/JSON.
client/src/test/java/com/microsoft/durabletask/DurableHttpResponseTest.java	Adds unit tests for durable HTTP response model/JSON.
client/src/test/java/com/microsoft/durabletask/DurableHttpRequestTest.java	Adds unit tests for durable HTTP request model/JSON and MI scenarios.
client/src/main/java/com/microsoft/durabletask/TokenSource.java	Adds polymorphic base type for durable HTTP auth token sources.
client/src/main/java/com/microsoft/durabletask/TimeSpanHelper.java	Adds internal utility for TimeSpan wire-format conversions.
client/src/main/java/com/microsoft/durabletask/TaskOrchestrationContext.java	Adds convenience callHttp(...) default methods on orchestration context.
client/src/main/java/com/microsoft/durabletask/ManagedIdentityTokenSource.java	Adds managed identity token source model with resource normalization.
client/src/main/java/com/microsoft/durabletask/ManagedIdentityOptions.java	Adds managed identity options model for authority host/tenant.
client/src/main/java/com/microsoft/durabletask/HttpRetryOptions.java	Adds durable HTTP retry policy model with TimeSpan serialization helpers.
client/src/main/java/com/microsoft/durabletask/DurableHttpResponse.java	Adds durable HTTP response model.
client/src/main/java/com/microsoft/durabletask/DurableHttpRequest.java	Adds durable HTTP request model incl. timeout/retry/token source.
client/src/main/java/com/microsoft/durabletask/DurableHttp.java	Adds orchestrator-side helper for invoking the built-in HTTP activity.
client/build.gradle	Improves JDK11 test runtime selection and Windows executable handling; removes local JUnit deps.
build.gradle	Centralizes JUnit 5 dependencies for all Java subprojects.
azuremanaged/build.gradle	Aligns test runtime selection and removes per-module JUnit deps.
azurefunctions/src/test/java/com/microsoft/durabletask/azurefunctions/DurableHttpTest.java	Adds unit tests ensuring DurableHttp delegates to callActivity as expected.
azurefunctions/build.gradle	Adds test toolchain config and Mockito deps to support new unit tests.

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[YunchuWang]

Code Review Summary

Overall risk: Moderate
Merge recommendation: Needs changes (at least F1/F2 should be addressed first)

This PR adds comprehensive callHttp support for the Java Durable Task SDK. The overall design is solid - good wire-format compatibility with .NET, strong test coverage, and clean API surface. A few issues should be fixed before merge.

Findings

• High (P1): 1 - normalizeResource prefix matching too broad (F1)
• Medium (P2): 1 - asynchronousPatternEnabled default mismatch on deserialization (F2)
• Low (P3): 2 - duplicated JDK path logic in build files (F3), setMaxRetryInterval missing validation (F4)
• Nit (P4): 1 - normalizeResource case-sensitive matching (F5)

See inline comments for details on F1, F2, and F4.

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[F3] JDK path resolution logic duplicated across 3 build.gradle files (Low / P3)

The ~15-line JDK path detection block (rawJdkPath, isWindows, exeSuffix) is copy-pasted identically in client/build.gradle, azurefunctions/build.gradle, and azuremanaged/build.gradle. Consider extracting to a shared Gradle script (e.g., gradle/jdk-config.gradle) and using apply from: in each module. Not blocking merge but worth a follow-up.

[F5] normalizeResource is case-sensitive (Nit / P4)

startsWith in ManagedIdentityTokenSource.normalizeResource() is case-sensitive. If a user passes HTTPS://MANAGEMENT.CORE.WINDOWS.NET, it won't match. In practice users almost always use lowercase, but using resource.toLowerCase(Locale.ROOT).startsWith(base) would be more robust.

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Positive notes: Excellent test coverage (constructor, serialization, round-trip, cross-extension parity tests), correct defensive copies with unmodifiable maps, proper polymorphic Jackson setup for TokenSource, and correct .NET TimeSpan format handling in TimeSpanHelper.

[bachuv]

[F3] JDK path resolution logic duplicated across 3 build.gradle files (Low / P3)
The ~15-line JDK path detection block (rawJdkPath, isWindows, exeSuffix) is copy-pasted identically in client/build.gradle, azurefunctions/build.gradle, and azuremanaged/build.gradle. Consider extracting to a shared Gradle script (e.g., gradle/jdk-config.gradle) and using apply from: in each module. Not blocking merge but worth a follow-up.

I will make this fix in a separate PR.