Kashif Faraz 0039409817 Add test framework to simulate segment loading and balancing (#13074) ... Fixes #12822 The framework added here make it easy to write tests that verify the behaviour and interactions of the following entities under various conditions: - `DruidCoordinator` - `HttpLoadQueuePeon`, `LoadQueueTaskMaster` - coordinator duties: `BalanceSegments`, `RunRules`, `UnloadUnusedSegments`, etc. - datasource retention rules: `LoadRule`, `DropRule` Changes: Add the following main classes: - `CoordinatorSimulation` and related interfaces to dictate behaviour of simulation - `CoordinatorSimulationBuilder` to build a simulation. - `BlockingExecutorService` to keep submitted tasks in queue and execute them only when explicitly invoked. Add tests: - `CoordinatorSimulationBaseTest`, `SegmentLoadingTest`, `SegmentBalancingTest` - `SegmentLoadingNegativeTest` to contain tests which assert the existing erroneous behaviour of segment loading. Once the behaviour is fixed, these tests will be moved to the regular `SegmentLoadingTest`. Please refer to the README.md in `org.apache.druid.server.coordinator.simulate` for more details		2022-09-21 09:51:58 +05:30
..
src	Add test framework to simulate segment loading and balancing (#13074)	2022-09-21 09:51:58 +05:30
pom.xml	Add interpolation to JsonConfigurator (#13023)	2022-09-07 12:48:01 +05:30