> On April 5, 2016, 9:55 p.m., Navina Ramesh wrote: > > samza-core/src/main/java/org/apache/samza/clustermanager/ContainerProcessManager.java, > > line 109 > > <https://reviews.apache.org/r/44920/diff/3/?file=1325321#file1325321line109> > > > > Why not move this class loader helper method into ClusterManagerConfig? > > It can return the ResourceManagerFactory class directly and the config API > > will be re-usable. > > Jagadish Venkatraman wrote: > I recommend that an implementation of Config should return/validate the > *value* of the property that the user configured. Instantiation of it using > ClassLoaders / deciding what to do with it may be done higher up the stack > (as it's done currently). This is done consistently in all other parts of the > Samza code base. Happy to chat in person if you think otherwise.
Yeah. I agree it is up to the higher up stack. My point was to make "Class loading" as a utility function (at the minimum, if not a method in ClusterManagerConfig) so that you don't have to do exception handling everytime you load a class. We have this convenience class in scala. It will be tremendously useful to do the same with Java utils as well. The upstream callers should only be responsible for casting it to the correct type. - Navina ----------------------------------------------------------- This is an automatically generated e-mail. To reply, visit: https://reviews.apache.org/r/44920/#review127192 ----------------------------------------------------------- On April 6, 2016, 5:31 p.m., Jagadish Venkatraman wrote: > > ----------------------------------------------------------- > This is an automatically generated e-mail. To reply, visit: > https://reviews.apache.org/r/44920/ > ----------------------------------------------------------- > > (Updated April 6, 2016, 5:31 p.m.) > > > Review request for samza, Boris Shkolnik, Chris Pettitt, Jake Maes, Yi Pan > (Data Infrastructure), Navina Ramesh, and Xinyu Liu. > > > Repository: samza > > > Description > ------- > > 1.Proposed new APIs for running Samza without Yarn. (SAMZA-881) > - Defined the ContainerProcessManager abstraction. > - Defined the SamzaResource, SamzaResourceRequest. > - Re-wrote the SamzaAppMaster logic into a ClusterBasedJobCoordinator. > 2.Defined a ClusterManagerConfig to handle configurations independent of > Yarn/Mesos. > 3.Made Samza completely independent of Yarn. This cleanly separates Samza > specific components and Yarn > specific components. > 4.Readability improvements to the existing code base. > -Added explicity documentation for every method, member and class > (including on thread-safety) > - Made internal variables final to document intent, visibility across > threads. (trivially by adding modifiers, or by changing where they're > initialized.) > 5.Refactored JobCoordinator into a JobModelReader. > > == Diff2 == > Address Chriss review feedback. > > Design Doc: > https://issues.apache.org/jira/secure/attachment/12790540/SamzaJobCoordinatorRe-designProposal.pdf > > == Diff 3 == > Address Yi's feedback > > > Diffs > ----- > > > samza-core/src/main/java/org/apache/samza/clustermanager/AbstractContainerAllocator.java > PRE-CREATION > > samza-core/src/main/java/org/apache/samza/clustermanager/ClusterBasedJobCoordinator.java > PRE-CREATION > > samza-core/src/main/java/org/apache/samza/clustermanager/ClusterResourceManager.java > PRE-CREATION > > samza-core/src/main/java/org/apache/samza/clustermanager/ContainerAllocator.java > PRE-CREATION > > samza-core/src/main/java/org/apache/samza/clustermanager/ContainerProcessManager.java > PRE-CREATION > > samza-core/src/main/java/org/apache/samza/clustermanager/ContainerRequestState.java > PRE-CREATION > > samza-core/src/main/java/org/apache/samza/clustermanager/HostAwareContainerAllocator.java > PRE-CREATION > > samza-core/src/main/java/org/apache/samza/clustermanager/ResourceFailure.java > PRE-CREATION > > samza-core/src/main/java/org/apache/samza/clustermanager/ResourceManagerFactory.java > PRE-CREATION > samza-core/src/main/java/org/apache/samza/clustermanager/SamzaAppState.java > PRE-CREATION > > samza-core/src/main/java/org/apache/samza/clustermanager/SamzaContainerLaunchException.java > PRE-CREATION > samza-core/src/main/java/org/apache/samza/clustermanager/SamzaResource.java > PRE-CREATION > > samza-core/src/main/java/org/apache/samza/clustermanager/SamzaResourceRequest.java > PRE-CREATION > > samza-core/src/main/java/org/apache/samza/clustermanager/SamzaResourceStatus.java > PRE-CREATION > samza-core/src/main/java/org/apache/samza/config/ClusterManagerConfig.java > PRE-CREATION > > samza-core/src/main/scala/org/apache/samza/coordinator/JobModelManager.scala > PRE-CREATION > > samza-core/src/main/scala/org/apache/samza/metrics/ContainerProcessManagerMetrics.scala > PRE-CREATION > > samza-core/src/test/java/org/apache/samza/clustermanager/MockClusterResourceManager.java > PRE-CREATION > > samza-core/src/test/java/org/apache/samza/clustermanager/MockClusterResourceManagerCallback.java > PRE-CREATION > > samza-core/src/test/java/org/apache/samza/clustermanager/MockContainerAllocator.java > PRE-CREATION > > samza-core/src/test/java/org/apache/samza/clustermanager/MockContainerListener.java > PRE-CREATION > > samza-core/src/test/java/org/apache/samza/clustermanager/MockContainerRequestState.java > PRE-CREATION > > samza-core/src/test/java/org/apache/samza/clustermanager/MockHttpServer.java > PRE-CREATION > > samza-core/src/test/java/org/apache/samza/clustermanager/TestContainerAllocator.java > PRE-CREATION > > samza-core/src/test/java/org/apache/samza/clustermanager/TestContainerProcessManager.java > PRE-CREATION > > samza-core/src/test/java/org/apache/samza/clustermanager/TestContainerRequestState.java > PRE-CREATION > > samza-core/src/test/java/org/apache/samza/clustermanager/TestHostAwareContainerAllocator.java > PRE-CREATION > samza-shell/src/main/bash/run-am.sh > 9545a96953baaff17ad14962e02bc12aadbb1101 > > samza-yarn/src/main/java/org/apache/samza/job/yarn/HostAwareContainerAllocator.java > 979719687be864bf24354aea0a7dc51b5f11a712 > samza-yarn/src/main/java/org/apache/samza/job/yarn/SamzaTaskManager.java > caee6e6c182d3cf86bd4fe193f8b1797605b2480 > > samza-yarn/src/main/java/org/apache/samza/job/yarn/refactor/YarnAppState.java > PRE-CREATION > > samza-yarn/src/main/java/org/apache/samza/job/yarn/refactor/YarnClusterResourceManager.java > PRE-CREATION > > samza-yarn/src/main/java/org/apache/samza/job/yarn/refactor/YarnContainerRunner.java > PRE-CREATION > > samza-yarn/src/main/java/org/apache/samza/job/yarn/refactor/YarnResourcemanagerFactory.java > PRE-CREATION > > samza-yarn/src/main/scala/org/apache/samza/job/yarn/refactor/SamzaAppMasterService.scala > PRE-CREATION > > samza-yarn/src/main/scala/org/apache/samza/job/yarn/refactor/SamzaYarnAppMasterLifecycle.scala > PRE-CREATION > > samza-yarn/src/test/java/org/apache/samza/job/yarn/TestHostAwareContainerAllocator.java > 0c7a09f3e4c4c2ce6788be729d0bf4a294243c68 > > Diff: https://reviews.apache.org/r/44920/diff/ > > > Testing > ------- > > Tested with sample jobs on clusters of varying sizes. Tested locally. TODO: > Unit tests. > > > Thanks, > > Jagadish Venkatraman > >
