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Bumps [org.apache.maven.plugins:maven-surefire-plugin](https://github.com/apache/maven-surefire) from 3.5.1 to 3.5.2. - [Release notes](https://github.com/apache/maven-surefire/releases) - [Commits](apache/maven-surefire@surefire-3.5.1...surefire-3.5.2) --- updated-dependencies: - dependency-name: org.apache.maven.plugins:maven-surefire-plugin dependency-type: direct:production update-type: version-update:semver-patch ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
* Update CannotSubtractException.java * Update CachingTest.java * Update App.java * Update caching.urm.puml * Update update-method.urm.puml
* docs: update README.md [skip ci] * docs: update .all-contributorsrc [skip ci] --------- Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>
Bumps [org.testng:testng](https://github.com/testng-team/testng) from 7.7.1 to 7.11.0. - [Release notes](https://github.com/testng-team/testng/releases) - [Changelog](https://github.com/testng-team/testng/blob/master/CHANGES.txt) - [Commits](testng-team/testng@7.7.1...7.11.0) --- updated-dependencies: - dependency-name: org.testng:testng dependency-type: direct:development update-type: version-update:semver-minor ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
* MapReduce design pattern added * Updated README.md * added module to parent pom
* docs: update README.md [skip ci] * docs: update .all-contributorsrc [skip ci] --------- Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>
Bumps [org.assertj:assertj-core](https://github.com/assertj/assertj) from 3.24.2 to 3.27.3. - [Release notes](https://github.com/assertj/assertj/releases) - [Commits](assertj/assertj@assertj-build-3.24.2...assertj-build-3.27.3) --- updated-dependencies: - dependency-name: org.assertj:assertj-core dependency-type: direct:production update-type: version-update:semver-minor ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Bumps org.slf4j:slf4j-api from 2.0.16 to 2.0.17. --- updated-dependencies: - dependency-name: org.slf4j:slf4j-api dependency-type: direct:production update-type: version-update:semver-patch ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
* docs: update README.md [skip ci] * docs: update .all-contributorsrc [skip ci] --------- Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>
…implementations (#3203) * fix typo * adding Reflection handling to other Singleton implementations
* docs: update README.md [skip ci] * docs: update .all-contributorsrc [skip ci] --------- Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>
* Add the implementation of Onion-Architecture * Execute maven command: mvn spotless:apply
Bumps [com.fasterxml.jackson.core:jackson-databind](https://github.com/FasterXML/jackson) from 2.18.3 to 2.22.0. - [Commits](https://github.com/FasterXML/jackson/commits) --- updated-dependencies: - dependency-name: com.fasterxml.jackson.core:jackson-databind dependency-version: 2.22.0 dependency-type: direct:production ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
* docs: update README.md [skip ci] * docs: update .all-contributorsrc [skip ci] --------- Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>
Bumps [com.diffplug.spotless:spotless-maven-plugin](https://github.com/diffplug/spotless) from 2.44.2 to 3.8.0. - [Release notes](https://github.com/diffplug/spotless/releases) - [Changelog](https://github.com/diffplug/spotless/blob/main/CHANGES.md) - [Commits](diffplug/spotless@maven/2.44.2...maven/3.8.0) --- updated-dependencies: - dependency-name: com.diffplug.spotless:spotless-maven-plugin dependency-version: 3.8.0 dependency-type: direct:production update-type: version-update:semver-major ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
* Update factory method Java API links Signed-off-by: Arnab Nandy <arnab_nandy7@yahoo.com> * Trigger PR checks Signed-off-by: Arnab Nandy <arnab_nandy7@yahoo.com> --------- Signed-off-by: Arnab Nandy <arnab_nandy7@yahoo.com>
* docs: update README.md [skip ci] * docs: update .all-contributorsrc [skip ci] --------- Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>
Add an educational rule-engine module demonstrating the Rule Engine pattern. Each business rule is an independent object exposing evaluate (decision) and execute (action); a RuleEngine evaluates a collection of rules against an immutable loan-application context in insertion order, runs the passing rules, and reports every passed and failed rule via an immutable RuleEngineResult. Includes three concrete rules, an App demo, unit tests, README, and class diagram.
* docs: update README.md [skip ci] * docs: update .all-contributorsrc [skip ci] --------- Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>
…3545) Bumps [ch.qos.logback:logback-core](https://github.com/qos-ch/logback) from 1.5.34 to 1.5.35. - [Release notes](https://github.com/qos-ch/logback/releases) - [Commits](qos-ch/logback@v_1.5.34...v_1.5.35) --- updated-dependencies: - dependency-name: ch.qos.logback:logback-core dependency-version: 1.5.35 dependency-type: direct:production ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
…3546) Bumps [ch.qos.logback:logback-core](https://github.com/qos-ch/logback) from 1.5.18 to 1.5.34. - [Release notes](https://github.com/qos-ch/logback/releases) - [Commits](qos-ch/logback@v_1.5.18...v_1.5.34) --- updated-dependencies: - dependency-name: ch.qos.logback:logback-core dependency-version: 1.5.34 dependency-type: direct:production ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
* Add Backends For Frontends pattern (#300) Implements the BFF pattern with two client-specific gateways (MobileBff, DesktopBff) aggregating shared downstream services (AuthService, CartService, OrderService, SupplierService) into client-tailored response shapes. Closes #300 * Rename SupplierService lookup key to productName for clarity The service is looked up by product name throughout the codebase, not an actual product ID as the previous naming implied. * Address review feedback: remove unnecessary compact constructors, add InMemory* service tests
* docs: update README.md [skip ci] * docs: update .all-contributorsrc [skip ci] --------- Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>
Bumps [com.fasterxml.jackson.core:jackson-databind](https://github.com/FasterXML/jackson) from 2.18.3 to 2.18.9. - [Commits](https://github.com/FasterXML/jackson/commits) --- updated-dependencies: - dependency-name: com.fasterxml.jackson.core:jackson-databind dependency-version: 2.18.9 dependency-type: direct:production ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
* Initialize microservices-messaging Spring Boot project Add initial project structure for microservices-messaging using Spring Boot. Includes Maven configuration with dependencies for Kafka, Lombok, and testing, as well as main application, test class, and application properties. * Initialize microservices messaging pattern 1. Added initial project structure for demonstrating the microservices messaging pattern. 2. Introduced service stubs (OrderService, InventoryService, PaymentService, NotificationService), a Message and MessageBroker class, and a main App entry point. 3. Added README and logging configuration. * Implement Message and MessageBroker classes 1. Added the Message class with unique ID, content, and timestamp fields, and a toString method. 2. Implemented the MessageBroker class to support topic-based publish-subscribe messaging, including subscriber management, message publishing, and logging. * Implement messaging pattern for microservices 1. Added message handling logic to InventoryService, PaymentService, and NotificationService. 2. OrderService now publishes order events to a MessageBroker, and App demonstrates the messaging workflow. 3. Each service processes relevant order events and logs actions for demonstration purposes. * Expand microservices messaging docs and add diagrams 1. Enhanced the README with detailed explanations, real-world examples, Java code samples, and references for the Microservices Messaging pattern. 2. Added flowchart and sequence diagram images to illustrate the pattern. * Refactor to use Kafka for microservices messaging 1. Added Apache Kafka for asynchronous communication between services. 2. Added KafkaMessageProducer and KafkaMessageConsumer classes, updated service implementations and main application logic to use Kafka, and adjusted the Maven configuration to include Kafka and Jackson dependencies. 3. Updated and moved all classes to the com.iluwatar.messaging package, improved documentation, and updated diagrams to reflect the new architecture. * Add unit tests and license headers to messaging module 1. Added comprehensive unit tests for App, InventoryService, KafkaMessageConsumer, KafkaMessageProducer, Message, NotificationService, OrderService, and PaymentService. 2. Added MIT license headers to all main source files and logback.xml. 3. Updated pom.xml to include JUnit Jupiter as a test dependency. * Refactor and simplify service and Kafka test classes 1. Simplified unit tests for InventoryService, NotificationService, and PaymentService by removing null content tests and adding instantiation checks. 2. Refactored KafkaMessageConsumerTest and KafkaMessageProducerTest to avoid requiring a real Kafka instance, focusing on class structure and method existence instead of integration behavior. * Add microservices-messaging module and run scripts Introduce the microservices-messaging module and register it in the root pom.xml. Add docker-compose.yml to run a local Kafka (confluentinc/cp-kafka) with a healthcheck, plus run-app.ps1 and run-app.sh helper scripts that start Kafka if needed and then launch the application. Update the module README with usage instructions. Also remove a duplicated junit-jupiter-api test dependency from the module pom to rely on project defaults. * microservices-messaging: code style and Lombok Add Lombok as a provided dependency and apply formatting/refactoring across the microservices-messaging module. Changes include import reordering, Javadoc and logging formatting, consistent lambda/try/catch indentation, small Kafka consumer/producer refinements (Duration/Properties usage and callback formatting), Message class tweaks (@Getter, JSON ctor and toString formatting) and EOF/newline fixes. Unit tests were also reformatted for consistency. These are non-functional style and readability improvements; no behavior changes intended. * Make Kafka producer/consumer testable Refactor KafkaMessageProducer and KafkaMessageConsumer to depend on the Producer/Consumer interfaces and add constructors that accept mockable instances. Extract default producer/consumer creation into factory methods so tests can inject MockProducer/MockConsumer. Update tests across the microservices-messaging module to use MockProducer/MockConsumer, add more meaningful assertions, error/interrupt handling tests, and simplify AppTest. These changes improve unit testability and remove the need for a running Kafka instance while preserving runtime behavior. * Format test Javadoc and reorder imports Normalize Javadoc formatting and reorder static JUnit imports for consistency in messaging tests. Converted multi-line test Javadocs to single-line comments and adjusted import ordering in the following files: - microservices-messaging/src/test/java/com/iluwatar/messaging/KafkaMessageConsumerTest.java - microservices-messaging/src/test/java/com/iluwatar/messaging/KafkaMessageProducerTest.java - microservices-messaging/src/test/java/com/iluwatar/messaging/OrderServiceTest.java No functional changes. * Add MIT headers and exclude .ps1 from license checks Add MIT license headers to microservices-messaging/docker-compose.yml, run-app.ps1 and run-app.sh to ensure license text is present in these scripts. Update root pom.xml to exclude PowerShell (*.ps1) files from the license plugin checks so those files are not processed by the license rule. * Add Kafka docker service to CI workflows Bring up Kafka for tests in CI and PR workflows. Adds steps to run docker compose for microservices-messaging, poll Kafka readiness (up to 20 retries), and always tear down with docker compose down. Enables Maven tests that depend on Kafka. Affects .github/workflows/maven-ci.yml and .github/workflows/maven-pr-builder.yml. * Use kafka-topics instead of kafka-topics.sh Replace calls to kafka-topics.sh with kafka-topics in CI workflows and the Docker Compose healthcheck. Updated .github/workflows/maven-ci.yml, .github/workflows/maven-pr-builder.yml, and microservices-messaging/docker-compose.yml to use the kafka-topics binary for readiness checks and healthchecks. This prevents failures on images that expose the kafka-topics command without the .sh wrapper. * Use docker compose --wait for Kafka startup Replace the custom bash readiness loop with `docker compose ... up -d --wait` in CI and PR workflows. This simplifies startup of the microservices-messaging Kafka service and removes the manual retry/polling logic. Files changed: .github/workflows/maven-ci.yml, .github/workflows/maven-pr-builder.yml. Note: requires a Docker Compose version that supports the `--wait` flag. * Reformat tests for readability Reformatted KafkaMessageConsumerTest and PaymentServiceTest for readability and consistent formatting: reflowed constructor invocation, expanded anonymous HashMap and schedulePollTask lambda blocks, and aligned assertDoesNotThrow parameters. These are pure style changes with no behavioral modifications. * Remove Kafka Docker Compose steps from CI Removed the Start/Stop Kafka Docker Service steps that ran docker compose for microservices-messaging from .github/workflows/maven-ci.yml and .github/workflows/maven-pr-builder.yml. Workflows no longer start or tear down the Kafka docker-compose service during CI/PR runs; other steps (xvfb install, Maven build, Codecov upload, Sonar cache) remain unchanged. * Bump google-java-format to 1.27.0; tidy tests Update pom.xml to use google-java-format 1.27.0 (was 1.17.0). Make minor formatting cleanups in KafkaMessageConsumerTest and PaymentServiceTest by collapsing multi-line calls into single lines. No functional changes. * Downgrade Google Java Format to 1.17.0 Update Spotless googleJavaFormat version in root pom.xml from 1.27.0 to 1.17.0 * Improve Kafka producer and consumer tests Enhance microservices-messaging tests: add consumer tests to verify run() exits immediately when stopped and gracefully handles a WakeupException (ensuring the MockConsumer is closed). Update producer error test to avoid try-with-resources, assert publish behavior and history, trigger failingProducer.errorNext(...) before closing to cover the error callback branch, then close and assert the mock producer is closed. * Refactor App.run and add messaging tests Extract App.run(...) and introduce a package-private sleepMs field to control sleep durations so the demo can be exercised programmatically and sped up for tests. Main now delegates to run; consumers are started there. Tests updated: AppTest sets sleepMs to 0 and adds testRunWithMockObjects using MockProducer/MockConsumer to exercise run without a Kafka broker; KafkaMessageProducerTest adds a null-message publish test; minor formatting fix in KafkaMessageConsumerTest. These changes improve testability and coverage for the microservices-messaging module.
* docs: update README.md [skip ci] * docs: update .all-contributorsrc [skip ci] --------- Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>
Bumps [com.fasterxml.jackson.core:jackson-databind](https://github.com/FasterXML/jackson) from 2.22.0 to 2.22.1. - [Commits](https://github.com/FasterXML/jackson/commits) --- updated-dependencies: - dependency-name: com.fasterxml.jackson.core:jackson-databind dependency-version: 2.22.1 dependency-type: direct:production ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Bumps [io.zipkin.reporter2:zipkin-reporter-brave](https://github.com/openzipkin/zipkin-reporter-java) from 3.5.0 to 3.5.3. - [Release notes](https://github.com/openzipkin/zipkin-reporter-java/releases) - [Changelog](https://github.com/openzipkin/zipkin-reporter-java/blob/master/RELEASE.md) - [Commits](openzipkin/zipkin-reporter-java@3.5.0...3.5.3) --- updated-dependencies: - dependency-name: io.zipkin.reporter2:zipkin-reporter-brave dependency-version: 3.5.3 dependency-type: direct:production update-type: version-update:semver-patch ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
* Add fork-join pattern implementation * Add input validation for start > end in SumTask Signed-off-by: SandhyaDevadiga <sandhyadevadiga8197@gmail.com> * Add fork-join module to parent pom.xml * Add missing assertThrows import in SumTaskTest * Format fork-join code with Spotless * Add AppTest to satisfy coverage requirements Signed-off-by: SandhyaDevadiga <sandhyadevadiga8197@gmail.com> --------- Signed-off-by: SandhyaDevadiga <sandhyadevadiga8197@gmail.com>
* docs: update README.md [skip ci] * docs: update .all-contributorsrc [skip ci] --------- Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>
* docs: update README.md [skip ci] * docs: update .all-contributorsrc [skip ci] --------- Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>
…atterns (#3583) Add Brazilian Portuguese (pt) translations for three previously untranslated pattern READMEs, following the existing localization/pt/ convention documented in the wiki (15. Support for multiple languages). Frontmatter and section headers follow the same structure used by the most recently updated existing translation (singleton), keeping code blocks, links, and image references unchanged from the English source.
* docs: update README.md [skip ci] * docs: update .all-contributorsrc [skip ci] --------- Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>
* Update README.md * Add logos
* Add transactional-outbox module Introduce a new transactional-outbox Maven module demonstrating the Transactional Outbox pattern. Adds a Spring Boot sample app and README explaining the pattern. New code includes Order and OutboxEvent entities, OrderStatus/EventStatus enums, Spring Data repositories (OrderRepository, OutboxRepository), OrderService (atomic write of order + outbox), OutboxPublisher (scheduled poll & publish), MessageBroker interface and MessageConsumer implementation, and App entrypoint. Includes unit tests (AppTest, OrderServiceTest, OutboxPublisherTest). Root pom.xml updated to register the new module. Module uses Spring Data JPA, Spring Web, Lombok, H2 and standard test dependencies. * Add OutboxPublisher edge-case tests Add two unit tests for OutboxPublisher: one verifies processOutboxEvents returns an empty list when there are no pending events; the other simulates a MessageBroker exception to ensure the event status is set to FAILED and the repository.save is called. Added necessary Mockito and assertion imports to support the tests. * Use MockitoExtension for OutboxPublisher test Replace the legacy inline/mock-based test with a JUnit5 + MockitoExtension unit test. Adds OutboxPublisherUnitTest (uses @ExtendWith(MockitoExtension.class), @mock and @Injectmocks) that verifies broker exceptions mark events as FAILED and that the repository.save(...) is called. Removes the duplicate inline-mocking test and unused Mockito imports from OutboxPublisherTest. * Replace Lombok @slf4j with explicit Logger Remove Lombok's @slf4j and add explicit org.slf4j.Logger/LoggerFactory fields in transactional-outbox classes. This makes logging explicit and removes reliance on Lombok's @slf4j annotation. * Add scheduled wrapper for outbox publishing Introduce publishOutboxEvents() annotated with @scheduled(fixedDelay = 5000) that delegates to the existing processOutboxEvents(). This separates the scheduling concern from the transactional processing method; processOutboxEvents() remains @transactional and now only handles fetching and dispatching pending OutboxEvent items. * Use UTC timestamps and add OutboxPublisher ctor Use UTC for timestamps in OrderService and OutboxPublisher by switching LocalDateTime.now() to LocalDateTime.now(ZoneOffset.UTC). Replace Lombok @requiredargsconstructor on OutboxPublisher with an explicit constructor for dependency injection and remove the @transactional annotation from processOutboxEvents. Update processedAt assignment to use UTC as well.
Bumps [com.fasterxml.jackson.core:jackson-databind](https://github.com/FasterXML/jackson) from 2.16.1 to 2.18.9. - [Commits](https://github.com/FasterXML/jackson/commits) --- updated-dependencies: - dependency-name: com.fasterxml.jackson.core:jackson-databind dependency-version: 2.18.9 dependency-type: direct:production ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Bumps org.apache.kafka:kafka-clients from 3.6.1 to 3.9.2. --- updated-dependencies: - dependency-name: org.apache.kafka:kafka-clients dependency-version: 3.9.2 dependency-type: direct:production ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
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