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Implement token generation and request signing using com.auth0:java-jwt.
GET requests attach a cached Bearer token; POST requests wrap the
payload as signed JWT claims in {"data":"<token>"} per the Montonio API
spec. MontonioTokenProvider is thread-safe and supports injectable Clock
for testing.
Closes #12
Related: #27 (webhook/return JWT validation — follow-up)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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🧹 Nitpick comments (4)
docs/plans/2026-04-10-jwt-authentication-design.md (1)
130-132: Minor clarification ongetDataToken()synchronisation.Line 132 states
getDataToken()"only synchronizes if sharing mutable resources", but the implementation correctly doesn't synchronise at all since it has no shared mutable state. Consider simplifying to: "getDataToken() requires no synchronisation as it does not access shared state."📝 Suggested clarification
- `synchronized(this)` guards all reads/writes to `cachedToken` and `cachedTokenExpiry` - Token generation (HMAC-SHA256) takes microseconds, so lock contention is negligible -- `getDataToken()` does not touch cached state, so it only synchronizes if sharing mutable resources +- `getDataToken()` requires no synchronisation as it does not access shared state🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@docs/plans/2026-04-10-jwt-authentication-design.md` around lines 130 - 132, The sentence about getDataToken() should be simplified to state it requires no synchronization because it does not access shared mutable state; update the line referencing synchronized(this) / getDataToken() so it clearly says getDataToken() requires no synchronization and does not touch cachedToken or cachedTokenExpiry (remove the "only synchronizes if sharing mutable resources" phrasing and replace with the explicit clarification).src/main/java/ee/bitweb/montonio/sdk/http/MontonioHttpClient.java (1)
45-53: Consider extractingObjectMappercreation to reduce duplication.The
ObjectMapperbuilder configuration is duplicated between lines 39-41 and 49-51. While minor, extracting this to a private static method would reduce maintenance burden if the configuration changes.♻️ Suggested refactor
+ private static ObjectMapper createObjectMapper() { + return JsonMapper.builder() + .disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES) + .build(); + } + MontonioHttpClient(MontonioSdkConfiguration configuration, HttpClient httpClient) { this.configuration = configuration; this.httpClient = httpClient; - this.objectMapper = JsonMapper.builder() - .disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES) - .build(); + this.objectMapper = createObjectMapper(); this.tokenProvider = new MontonioTokenProvider(configuration, objectMapper); } MontonioHttpClient(MontonioSdkConfiguration configuration, HttpClient httpClient, MontonioTokenProvider tokenProvider) { this.configuration = configuration; this.httpClient = httpClient; - this.objectMapper = JsonMapper.builder() - .disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES) - .build(); + this.objectMapper = createObjectMapper(); this.tokenProvider = tokenProvider; }🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@src/main/java/ee/bitweb/montonio/sdk/http/MontonioHttpClient.java` around lines 45 - 53, Extract the repeated ObjectMapper construction into a single private static helper (e.g., createObjectMapper) and call it from the MontonioHttpClient constructor and any other places where JsonMapper.builder().disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES).build() is duplicated; update MontonioHttpClient to assign this.objectMapper = createObjectMapper() and ensure the helper returns a configured ObjectMapper built with JsonMapper.builder() and the DeserializationFeature setting so future config changes are centralized.src/test/java/ee/bitweb/montonio/sdk/auth/MontonioTokenProviderTest.java (1)
303-305: Consider addingawaitTermination()aftershutdown()for cleaner test isolation.
executor.shutdown()only initiates an orderly shutdown but doesn't wait for tasks to complete. WhiledoneLatch.await()ensures all tasks have finished their work, addingawaitTermination()is a defensive practice that ensures the executor is fully terminated before the test completes.♻️ Suggested improvement
startLatch.countDown(); doneLatch.await(); executor.shutdown(); + assertTrue(executor.awaitTermination(5, java.util.concurrent.TimeUnit.SECONDS));🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@src/test/java/ee/bitweb/montonio/sdk/auth/MontonioTokenProviderTest.java` around lines 303 - 305, In MontonioTokenProviderTest, after calling executor.shutdown() (in the test where startLatch/doneLatch are used), call executor.awaitTermination(...) with a reasonable timeout (e.g., a few seconds) and handle InterruptedException appropriately (re-interrupt or fail the test) to ensure the executor is fully terminated before the test exits; optionally assert executor.isTerminated() to enforce cleaner test isolation.build.gradle (1)
33-33: Consider upgrading tocom.auth0:java-jwt:4.5.0.Version 4.4.0 exists and is functional; however, 4.5.0 is the current latest release on Maven Central. If your project maintains dependencies on recent stable versions, upgrading is recommended. For security advisories, use your project's built-in dependency scanning tools (such as Gradle Dependency Check or similar) to verify no known vulnerabilities affect either version.
🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@build.gradle` at line 33, The dependency declaration for com.auth0:java-jwt is pinned to version 4.4.0; update the implementation coordinate to use the newer stable release 4.5.0 by editing the implementation line that currently reads "com.auth0:java-jwt:4.4.0" to "com.auth0:java-jwt:4.5.0" in build.gradle, then run a Gradle refresh/resolve to verify compatibility and run your project's tests to ensure no regressions.
🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed.
Nitpick comments:
In `@build.gradle`:
- Line 33: The dependency declaration for com.auth0:java-jwt is pinned to
version 4.4.0; update the implementation coordinate to use the newer stable
release 4.5.0 by editing the implementation line that currently reads
"com.auth0:java-jwt:4.4.0" to "com.auth0:java-jwt:4.5.0" in build.gradle, then
run a Gradle refresh/resolve to verify compatibility and run your project's
tests to ensure no regressions.
In `@docs/plans/2026-04-10-jwt-authentication-design.md`:
- Around line 130-132: The sentence about getDataToken() should be simplified to
state it requires no synchronization because it does not access shared mutable
state; update the line referencing synchronized(this) / getDataToken() so it
clearly says getDataToken() requires no synchronization and does not touch
cachedToken or cachedTokenExpiry (remove the "only synchronizes if sharing
mutable resources" phrasing and replace with the explicit clarification).
In `@src/main/java/ee/bitweb/montonio/sdk/http/MontonioHttpClient.java`:
- Around line 45-53: Extract the repeated ObjectMapper construction into a
single private static helper (e.g., createObjectMapper) and call it from the
MontonioHttpClient constructor and any other places where
JsonMapper.builder().disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES).build()
is duplicated; update MontonioHttpClient to assign this.objectMapper =
createObjectMapper() and ensure the helper returns a configured ObjectMapper
built with JsonMapper.builder() and the DeserializationFeature setting so future
config changes are centralized.
In `@src/test/java/ee/bitweb/montonio/sdk/auth/MontonioTokenProviderTest.java`:
- Around line 303-305: In MontonioTokenProviderTest, after calling
executor.shutdown() (in the test where startLatch/doneLatch are used), call
executor.awaitTermination(...) with a reasonable timeout (e.g., a few seconds)
and handle InterruptedException appropriately (re-interrupt or fail the test) to
ensure the executor is fully terminated before the test exits; optionally assert
executor.isTerminated() to enforce cleaner test isolation.
ℹ️ Review info
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Run ID: 8cce44e1-5d44-42ab-82aa-0d4ae89ee194
📒 Files selected for processing (6)
build.gradledocs/plans/2026-04-10-jwt-authentication-design.mdsrc/main/java/ee/bitweb/montonio/sdk/auth/MontonioTokenProvider.javasrc/main/java/ee/bitweb/montonio/sdk/http/MontonioHttpClient.javasrc/test/java/ee/bitweb/montonio/sdk/auth/MontonioTokenProviderTest.javasrc/test/java/ee/bitweb/montonio/sdk/http/MontonioHttpClientTest.java
Upgrade java-jwt to 4.5.0, extract ObjectMapper creation to static helper, add awaitTermination to concurrent test, clarify getDataToken synchronisation wording in design doc. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
MontonioTokenProviderinee.bitweb.montonio.sdk.auth— thread-safe JWT generation usingcom.auth0:java-jwtAuthorizationheader (auto-renews 30s before expiry){"data":"<token>"}per Montonio API specCloses #12
Follow-up: #27 (JWT webhook/return validation)
Test plan
MontonioTokenProviderTest— 18 tests covering auth tokens, data tokens, caching, thread safety, error handlingMontonioHttpClientTest— updated + 2 new tests for Bearer header on GET, JWT-wrapped body on POST./gradlew build)🤖 Generated with Claude Code
Summary by CodeRabbit
New Features
Documentation
Tests