Return the finished Task from waitForTask and add a Client timeout overload

[hwhang0917]

Pull Request

Related issue

Fixes #991

What does this PR do?

• waitForTask on Client, Index and TasksHandler now returns the Task in its final state (succeeded, failed or canceled) instead of void, matching the other official Meilisearch SDKs (js, python, go, rust, dotnet). Callers can inspect getStatus() / getError() without a second getTask round trip.
• Adds Client.waitForTask(int uid, int timeoutInMs, int intervalInMs). Index already had this overload; Client was stuck with the hard-coded 5000ms / 50ms.
• MeilisearchTimeoutException now carries a message: Task <uid> not finished after <timeout>ms (last status: <status>). An interrupted wait keeps the interrupt flag and wraps the InterruptedException as the cause instead of throwing a bare exception.
• The polling loop returns as soon as a terminal status is observed instead of sleeping one more interval first.
• failed / canceled tasks are returned, not thrown, on purpose: this is what the SDKs linked above do and it keeps existing callers that wait on an intentionally failing task working.

Tests added in TasksTest: returned task for a succeeded task, returned task for a failed task (index_already_exists), the new Client overload, and the timeout message.

Compatibility note

void to Task is source compatible (existing call sites that ignore the result still compile) but not binary compatible for consumers compiled against an older jar; they need a recompile.

testWaitForTaskTimoutInMs was adjusted: it used to wait on an already-finished task with a 0ms timeout and expect an exception. A finished task is now returned immediately, so the test waits on a freshly enqueued task instead.

PR checklist

Please check if your PR fulfills the following requirements:

• Does this PR fix an existing issue, or have you listed the changes applied in the PR description (and why they are needed)?
• Have you read the contributing guidelines?
• Have you made sure that the title is accurate and descriptive of the changes?

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Summary by CodeRabbit

• New Features

  • Task-waiting methods now return the completed task, including its status and details.
  • Added configurable timeout and polling intervals when waiting for tasks.
  • Client- and index-level task waiting now provide consistent results.

• Bug Fixes

  • Timeout errors now provide clearer information, including the task identifier and timeout duration.
  • Waiting no longer exceeds the configured timeout when the polling interval is longer than the remaining wait time.

• Tests

  • Added coverage for successful and failed tasks, configurable timeouts, and timeout messages.

[coderabbitai]

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Reviewing files that changed from the base of the PR and between a71cf12 and da05193.

📒 Files selected for processing (2)

• src/main/java/com/meilisearch/sdk/TasksHandler.java
• src/test/java/com/meilisearch/integration/TasksTest.java

🚧 Files skipped from review as they are similar to previous changes (2)

• src/test/java/com/meilisearch/integration/TasksTest.java
• src/main/java/com/meilisearch/sdk/TasksHandler.java

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📝 Walkthrough

Walkthrough

waitForTask now returns the final Task from Client, Index, and TasksHandler. Client adds configurable timeout and interval parameters. Polling uses a deadline, and timeout exceptions include task details. Integration tests cover success, failure, timeout, and client overloads.

Changes

Task waiting API

Layer / File(s)	Summary
Task waiting core src/main/java/com/meilisearch/sdk/TasksHandler.java	TasksHandler returns final tasks, uses named default timeout values, computes polling deadlines, caps sleep duration, and adds details to timeout and interruption exceptions.
Public waitForTask entry points src/main/java/com/meilisearch/sdk/Client.java, src/main/java/com/meilisearch/sdk/Index.java	Client adds the configurable overload. Client and Index return the final Task from both wait methods.
Task waiting integration validation src/test/java/com/meilisearch/integration/TasksTest.java	Integration tests validate succeeded and failed task results, client timeout parameters, interval deadline handling, and descriptive timeout exceptions.

Priority: ➖ Normal — Impact reflects medium issue severity.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Severity of issue fixed: Medium

Merge Risk: ⚪ Minimal · up to da051

The task-waiting API now returns completed tasks, supports configurable polling parameters, and improves timeout and interruption handling. No concrete current merge-blocking risk remains.

Sequence Diagram(s)

sequenceDiagram
  participant Client
  participant TasksHandler
  participant MeilisearchTaskEndpoint
  Client->>TasksHandler: waitForTask(uid, timeout, interval)
  loop Until final status or deadline
    TasksHandler->>MeilisearchTaskEndpoint: poll task status
    MeilisearchTaskEndpoint-->>TasksHandler: return Task state
  end
  TasksHandler-->>Client: return final Task

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🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly states the primary changes: returning the finished Task and adding the Client timeout overload.
Linked Issues check	✅ Passed	The changes satisfy issue #991. Client, Index, and TasksHandler waitForTask methods return the final Task; Client gains configurable timeout and interval parameters; failed tasks are returned; timeout…
Out of Scope Changes check	✅ Passed	All implementation and test changes support issue #991. No unrelated code changes are identified.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 11 functions across 4 files.

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_{A rabbit checks each task in line
And finds its final state in time
The clock stops before sleeps grow long
Failed tasks still report what’s wrong
Client waits now take the path
With clear timeout notes, not math-bath}

_{Comment @coderabbitai help to get the list of available commands.}

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Actionable comments posted: 1

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Inline comments:
In `@src/main/java/com/meilisearch/sdk/TasksHandler.java`:
- Line 148: Update the repeated polling flow around TasksHandler.getTask so it
checks the deadline before every poll after the initial observation and sleeps
for no longer than the remaining timeout. Preserve the initial poll, return
timeout once the deadline is reached, and add a regression test covering an
interval longer than timeoutInMs.

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Configuration used: Organization UI

Review profile: CHILL

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Run ID: e9d831ed-a0e6-420f-a0a3-4d4a8242f8a9

📥 Commits

Reviewing files that changed from the base of the PR and between 740d3f6 and a71cf12.

📒 Files selected for processing (4)

• src/main/java/com/meilisearch/sdk/Client.java
• src/main/java/com/meilisearch/sdk/Index.java
• src/main/java/com/meilisearch/sdk/TasksHandler.java
• src/test/java/com/meilisearch/integration/TasksTest.java

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[hwhang0917]

Note: changing the return type from void to Task is source compatible but binary incompatible, so this probably wants the breaking-change label.

If you would rather keep this out of a breaking release, I can keep void waitForTask(...) untouched and add the Task-returning variant under a new name (e.g. waitForTaskAndGet) instead.

I lean towards the breaking change since it matches the other SDKs, but happy to go either way.