Using ThreadLocals for this specific problem isn't only considered best practices for concurrency, but for minimizing garbage/object creation during thread contention. In 5+ years, I can't believe no one has mentioned or posted a solution that uses ThreadLocal to solve this problem and several of the solutions on this page are not threadsafe and are just sloppy. Note: I am a committer for Eclipse Collections. Progress, so the computation should be short and simple. This map by other threads may be blocked while computation is in The entire method invocation is performed atomically, so the function This fact sets it apart from Java 8's puteIfAbsent(K, Function). While every effort is made not to call the factory function unnecessarily, there's still a chance it will be called more than once during contention. The implementation of. is truly non-blocking. Map.getIfAbsentPut("key", () -> someExpensiveComputation()) import. ĬoncurrentHashMap map = new ConcurrentHashMap() In ConcurrentMaps like ., the implementation of getIfAbsentPut() is also thread-safe and atomic. The advantage over calling get(), doing a null check, and then calling putIfAbsent() is that we'll only compute the key's hashCode once, and find the right spot in the hashtable once. Mockito cannot mock this class: class $Pet.Īt app//(SecurityManagerTest.java:19)Īt app//.(ReflectionUtils.java:688)Īt app//.(MethodInvocation.java:60)Īt app//.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131)Īt app//.(TimeoutInvocation.java:46)Īt app//.(TimeoutExtension.java:149)Īt app//.(TimeoutExtension.java:140)Īt app//.(TimeoutExtension.java:84)Īt app//.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(ExecutableInvoker.java:115)Īt app//.$invoke$0(ExecutableInvoker.java:105)Īt app//.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106)Īt app//.(InvocationInterceptorChain.java:64)Īt app//.(InvocationInterceptorChain.java:45)Īt app//.(InvocationInterceptorChain.java:37)Īt app//.(ExecutableInvoker.java:104)Īt app//.(ExecutableInvoker.java:98)Īt app//.$invokeTestMethod$6(TestMethodTestDescriptor.java:210)Īt app//.(ThrowableCollector.java:73)Īt app//.(TestMethodTestDescriptor.java:206)Īt app//.(TestMethodTestDescriptor.java:131)Īt app//.(TestMethodTestDescriptor.java:65)Īt app//.$executeRecursively$5(NodeTestTask.java:139)Īt app//.$executeRecursively$7(NodeTestTask.java:129)Īt app//.(Node.java:137)Īt app//.$executeRecursively$8(NodeTestTask.java:127)Īt app//.(NodeTestTask.java:126)Īt app//.(NodeTestTask.java:84)Īt app//.(SameThreadHierarchicalTestExecutorService.java:38)Īt app//.$executeRecursively$5(NodeTestTask.java:143)Īt app//. can use MutableMap.getIfAbsentPut(K, Function0) from Eclipse Collections (formerly GS Collections). I wonder if the error then has something to do with the dependencies I'm using.
Do i need java 8 update 73 or 74 update#
When I switched to run Eclipse under Java 6 update 21, it all worked fine.
Do i need java 8 update 73 or 74 code#
How did you run the example? Did you use use my GitHub project Or did you create your own based on the code I pasted above? I suffered the same problem as sunshuhua in that the update (or archived update) would loop trying to get .api3.0.0. when running eclipse Helios under Java 7 (build 1.7.0-ea-b59).
testEnumWithMethods Time elapsed: 2.267 s <<< ERROR!Ĭaused by: : class redefinition failed: attempted to change the class NestHost, NestMembers, Record, or PermittedSubclasses attribute` ` Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 2.287 s <<< FAILURE! - in Thanks for checking it, I've upgraded to the latest OpenJDK and the latest Mockito. Is there some way I can work around this issue?
It can be build with Docker for instance with (17 can be replaced with 11 and 16):ĭocker build -t javaupgrades -f. The complete code example can be found here: Underlying exception : .MockitoException: Could not modify all classes Ĭaused by: .MockitoException: Could not modify all classes Ĭaused by: : class redefinition failed: attempted to change the class NestHost, NestMembers, Record, or PermittedSubclasses attribute You can learn about inline mocks and their limitations under item #39 of the Mockito class javadoc. You are seeing this disclaimer because Mockito is configured to create inlined mocks. If you're not sure why you're getting this error, please report to the mailing list.
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