Use Locks instead of synchronised keyword #3077
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WalkthroughThe recent updates to TestNG focus on enhancing thread safety and concurrency control by replacing the Changes
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Actionable comments generated: 2
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Files selected for processing (23)
- CHANGES.txt (1 hunks)
- testng-core-api/src/main/java/org/testng/Reporter.java (3 hunks)
- testng-core-api/src/main/java/org/testng/internal/AutoCloseableLock.java (1 hunks)
- testng-core-api/src/main/java/org/testng/internal/KeyAwareAutoCloseableLock.java (1 hunks)
- testng-core/src/main/java/org/testng/SkipException.java (3 hunks)
- testng-core/src/main/java/org/testng/SuiteRunner.java (1 hunks)
- testng-core/src/main/java/org/testng/internal/ConfigurationGroupMethods.java (4 hunks)
- testng-core/src/main/java/org/testng/internal/invokers/ConfigInvoker.java (2 hunks)
- testng-core/src/main/java/org/testng/internal/invokers/TestInvoker.java (1 hunks)
- testng-core/src/main/java/org/testng/internal/invokers/TestMethodWorker.java (3 hunks)
- testng-core/src/main/java/org/testng/internal/thread/graph/GraphOrchestrator.java (5 hunks)
- testng-core/src/main/java/org/testng/reporters/JUnitXMLReporter.java (2 hunks)
- testng-core/src/main/java/org/testng/xml/XMLParser.java (2 hunks)
- testng-core/src/test/java/test/configuration/ConfigurationGroupBothSampleTest.java (1 hunks)
- testng-core/src/test/java/test/inheritance/issue2489/tests/BaseClassA.java (2 hunks)
- testng-core/src/test/java/test/junitreports/TestClassContainerForGithubIssue1265.java (1 hunks)
- testng-core/src/test/java/test/listeners/factory/ExampleListener.java (1 hunks)
- testng-core/src/test/java/test/listeners/issue2043/listeners/FailFastListener.java (2 hunks)
- testng-core/src/test/java/test/retryAnalyzer/issue2798/HashCodeAwareRetryAnalyzer.java (1 hunks)
- testng-core/src/test/java/test/testng1232/TestListenerFor1232.java (1 hunks)
- testng-core/src/test/java/test/thread/BaseThreadTest.java (2 hunks)
- testng-core/src/test/java/test/thread/MultiThreadedDependentSampleTest.java (2 hunks)
- testng-core/src/test/java/test/thread/MultiThreadedDependentTest.java (2 hunks)
Additional comments: 24
testng-core-api/src/main/java/org/testng/internal/AutoCloseableLock.java (1)
- 1-23: The implementation of
AutoCloseableLockis well-designed and follows best practices for managing locks in Java. UsingAutoCloseableLockin a try-with-resources statement ensures that the lock is always properly released, even in the case of an exception. This is a significant improvement in terms of code maintainability and safety.testng-core/src/test/java/test/retryAnalyzer/issue2798/HashCodeAwareRetryAnalyzer.java (1)
- 19-23: The use of
AutoCloseableLockwithin theretrymethod is correctly implemented to ensure thread safety when accessing and modifying shared resources. This change enhances the concurrency control in the retry logic, ensuring that thehashCodeslist and thecntvariable are accessed in a thread-safe manner. Good job on implementing this pattern.testng-core/src/test/java/test/junitreports/TestClassContainerForGithubIssue1265.java (1)
- 13-16: The modifications mentioned involve removing the
synchronizedkeyword from thestartEverythingandshutdownContainermethods without showing the addition of alternative synchronization mechanisms likeReentrantLock. If these methods do not access shared resources or if there's no need for synchronization, this change could be justified. However, it's important to ensure that removingsynchronizeddoes not introduce concurrency issues. Can you clarify if these methods require synchronization based on their internal logic or accessed resources?testng-core-api/src/main/java/org/testng/Reporter.java (4)
- 71-77: The introduction of
AutoCloseableLockfor synchronized logging in thelogmethod is a good practice for ensuring thread safety. However, it's important to ensure that all logging operations throughout the codebase are updated to use this new mechanism to maintain consistency.- 79-79: The
logToReportsmethod correctly handles HTML escaping based on them_escapeHtmlflag and manages orphaned output. This method improves modularity by separating the concerns of logging and managing output storage.- 169-175: Using
AutoCloseableLockin thegetOutputmethod for synchronized output retrieval is a positive change for thread safety. Similar to the logging changes, ensure that all output retrieval operations are updated to use this new locking mechanism.- 177-177: The
getOutputFromResultmethod is well-implemented for retrieving test outputs in a thread-safe manner. It correctly handles the case where the test result might be null, preventing potentialNullPointerExceptions.testng-core/src/main/java/org/testng/internal/ConfigurationGroupMethods.java (3)
- 31-35: The introduction of
AutoCloseableLockinstances for managing synchronization aroundbeforeGroupsandafterGroupsis a significant improvement for thread safety. This change ensures that group-related operations are performed atomically, reducing the risk of concurrency issues.- 70-70: The use of
AutoCloseableLockingetBeforeGroupMethodsForGroupensures that the retrieval and processing of before group methods are thread-safe. This is crucial in a multi-threaded environment to prevent inconsistent states.- 85-85: Similarly, employing
AutoCloseableLockingetAfterGroupMethodsfor after group methods retrieval enhances thread safety. It's important to verify that all group-related operations across the codebase consistently use these locks.testng-core/src/main/java/org/testng/reporters/JUnitXMLReporter.java (2)
- 150-157: The introduction of
AutoCloseableLockfor thread-safe XML document creation increateElementFromTestResultsis a prudent change. This ensures that the document creation process is protected from concurrent modifications, which is essential for maintaining data integrity.- 161-169: Using
AutoCloseableLockincreateElementFromIgnoredTeststo ensure thread safety during the creation of XML elements for ignored tests is a good practice. This change helps prevent potential issues arising from concurrent access to shared resources.testng-core/src/main/java/org/testng/internal/invokers/TestMethodWorker.java (1)
- 121-129: > 📝 NOTE
This review was outside the diff hunks and was mapped to the diff hunk with the greatest overlap. Original lines [105-135]
The introduction of
KeyAwareAutoCloseableLockand its usage inTestMethodWorkerfor synchronizing the invocation ofbeforeClassandafterClassmethods is a significant improvement for thread safety. This change ensures that class-level setup and teardown operations are performed atomically, reducing the risk of concurrency issues. It's important to ensure that all class-level operations across the codebase consistently use this locking mechanism.testng-core/src/main/java/org/testng/SuiteRunner.java (1)
- 418-418: The introduction of
AutoCloseableLocknamedsuiteResultsLockis a good practice for managing locks in a safer and more readable manner, especially when used in a try-with-resources statement. This approach ensures that the lock is always released, even if an exception occurs, which is crucial for avoiding deadlocks.testng-core/src/main/java/org/testng/internal/invokers/ConfigInvoker.java (3)
- 31-31: The import of
org.testng.internal.AutoCloseableLockis correctly added to utilize theAutoCloseableLockclass for lock management. This change aligns with the PR's objective to replacesynchronizedblocks withReentrantLockmechanisms.- 560-560: The addition of the
private final AutoCloseableLock internalLock = new AutoCloseableLock();field introduces a lock that can be used across theConfigInvokerclass to manage concurrency more effectively than the previoussynchronizedapproach. This change is crucial for the intended improvements in concurrency management.- 563-563: The replacement of a
synchronizedblock with a try-with-resources statement usinginternalLock.lock()in thesetClassInvocationFailuremethod is a significant improvement. This change leverages theAutoCloseablefeature of theAutoCloseableLock, ensuring that the lock is automatically released when the try block is exited, which is a best practice for managing locks and preventing potential deadlocks.testng-core/src/main/java/org/testng/internal/invokers/TestInvoker.java (3)
- 851-851: The introduction of
AutoCloseableLockas a static final variable is a good practice for lock objects, ensuring that the lock is shared across all instances ofTestInvoker. This aligns with the objective of replacing synchronized blocks with more flexible locking mechanisms.- 858-860: The use of
AutoCloseableLockwithin a try-with-resources statement is a correct implementation for replacing a synchronized block. This ensures that the lock is automatically released when the block is exited, either normally or via an exception, which is a key advantage ofAutoCloseableLock.- 863-902: Splitting the
considerExceptionsmethod intoconsiderExceptionsandconsiderExceptionsInternalimproves readability and maintainability by separating the locking mechanism from the business logic. This change also adheres to the Single Responsibility Principle, making the code easier to understand and test. However, ensure that all calls toconsiderExceptionshave been updated to reflect this change, avoiding any potential issues with method invocation.CHANGES.txt (4)
- 2-2: The summary correctly highlights the replacement of
synchronizedwithReentrantLockas a significant change aimed at enhancing concurrency management in TestNG. This change aligns with modern Java concurrency practices and is expected to improve performance and thread safety.- 2-2: The update to TestNG's
DataProviderbehavior to align with version 6.x when retrying tests addresses a critical functionality for test execution consistency. Ensuring that the behavior matches across versions is crucial for users upgrading TestNG without altering their tests' expected outcomes.- 2-2: The adjustment for dynamically managing TestNG threads post-deprecation of
IExecutorFactoryis a significant improvement. It addresses the need for more flexible execution management within TestNG, allowing for better resource utilization and potentially enhancing execution efficiency.- 2-2: Introducing the ability for users to define the ordering of TestNG listeners is a valuable addition. It provides users with more control over the execution flow of their tests, especially in complex scenarios where the order of listener execution can impact test outcomes or debugging processes.
testng-core/src/test/java/test/listeners/factory/ExampleListener.java
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vlsi
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Feb 26, 2024
testng-core/src/test/java/test/retryAnalyzer/issue2798/HashCodeAwareRetryAnalyzer.java
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testng-core/src/test/java/test/listeners/factory/ExampleListener.java
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testng-core/src/main/java/org/testng/internal/invokers/TestInvoker.java
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testng-core-api/src/main/java/org/testng/internal/KeyAwareAutoCloseableLock.java
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Actionable comments generated: 0
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Files selected for processing (3)
- testng-core/src/main/java/org/testng/internal/invokers/TestInvoker.java (1 hunks)
- testng-core/src/test/java/test/listeners/factory/ExampleListener.java (1 hunks)
- testng-core/src/test/java/test/thread/MultiThreadedDependentTest.java (2 hunks)
Files skipped from review as they are similar to previous changes (3)
- testng-core/src/main/java/org/testng/internal/invokers/TestInvoker.java
- testng-core/src/test/java/test/listeners/factory/ExampleListener.java
- testng-core/src/test/java/test/thread/MultiThreadedDependentTest.java
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Files selected for processing (4)
- testng-core/src/main/java/org/testng/internal/invokers/TestInvoker.java (1 hunks)
- testng-core/src/test/java/test/listeners/factory/ExampleListener.java (1 hunks)
- testng-core/src/test/java/test/listeners/factory/TestNGFactoryTest.java (1 hunks)
- testng-core/src/test/java/test/thread/MultiThreadedDependentTest.java (2 hunks)
Files skipped from review as they are similar to previous changes (3)
- testng-core/src/main/java/org/testng/internal/invokers/TestInvoker.java
- testng-core/src/test/java/test/listeners/factory/ExampleListener.java
- testng-core/src/test/java/test/thread/MultiThreadedDependentTest.java
Additional comments: 1
testng-core/src/test/java/test/listeners/factory/TestNGFactoryTest.java (1)
- 26-26: The change from
ExampleListener.instancetoExampleListener.getInstance()aligns with Java best practices for encapsulating access to class members, especially in the context of improving concurrency management. This is a positive change that supports the PR's objectives.
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Files selected for processing (4)
- testng-core-api/src/main/java/org/testng/internal/AutoCloseableLock.java (1 hunks)
- testng-core-api/src/main/java/org/testng/internal/KeyAwareAutoCloseableLock.java (1 hunks)
- testng-core/src/main/java/org/testng/internal/invokers/TestMethodWorker.java (3 hunks)
- testng-core/src/test/java/org/testng/internal/KeyAwareAutoCloseableLockTest.java (1 hunks)
Files skipped from review as they are similar to previous changes (3)
- testng-core-api/src/main/java/org/testng/internal/AutoCloseableLock.java
- testng-core-api/src/main/java/org/testng/internal/KeyAwareAutoCloseableLock.java
- testng-core/src/main/java/org/testng/internal/invokers/TestMethodWorker.java
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| @Test | ||
| public void ensureLockIsReEntrant() { | ||
| String key = "TestNG"; | ||
| KeyAwareAutoCloseableLock lock = new KeyAwareAutoCloseableLock(); | ||
| KeyAwareAutoCloseableLock.AutoReleasable outer, inner1, inner2; | ||
| try (KeyAwareAutoCloseableLock.AutoReleasable ignore = lock.lockForObject(key)) { | ||
| outer = ignore; | ||
| try (KeyAwareAutoCloseableLock.AutoReleasable ignore1 = lock.lockForObject(key)) { | ||
| inner1 = ignore1; | ||
| } | ||
| try (KeyAwareAutoCloseableLock.AutoReleasable ignore2 = lock.lockForObject(key)) { | ||
| inner2 = ignore2; | ||
| } | ||
| } | ||
| assertThat(outer).isEqualTo(inner1); | ||
| assertThat(inner1).isEqualTo(inner2); | ||
| } |
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The test ensureLockIsReEntrant correctly verifies the re-entrant nature of KeyAwareAutoCloseableLock by locking on the same key multiple times and asserting that the lock instances (outer, inner1, inner2) are equal. This approach effectively demonstrates that the lock is re-entrant for the same key. However, the test could be enhanced by adding assertions to check that the lock is actually held during each try block, ensuring that the lock's behavior aligns with expectations beyond just re-entrancy. Additionally, consider adding negative test cases to verify that the lock is not re-entrant for different keys and that appropriate exceptions are thrown or behaviors are exhibited in such scenarios.
// Suggestion to enhance the test by verifying the lock is held
// and adding negative test cases for different keys.
vlsi
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- testng-core/src/main/java/org/testng/internal/invokers/TestMethodWorker.java (1 hunks)
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- testng-core/src/main/java/org/testng/internal/invokers/TestMethodWorker.java
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ping @juherr |
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Closes #3040
Fixes #3040 .
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CHANGES.txt./gradlew autostyleApplyWe encourage pull requests that:
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Summary by CodeRabbit
synchronizedblocks withAutoCloseableLockandKeyAwareAutoCloseableLockfor better concurrency control.IExecutorFactory.AutoCloseableLockin theReporter.java.SkipException,SuiteRunner, and test classes, withAutoCloseableLockandKeyAwareAutoCloseableLockfor improved concurrency management.