object HaCoordinator
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- class CannotAcquireLockException extends RuntimeException
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- def databaseLockBasedHaCoordinator(mainConnectionFactory: () => Connection, storageBackend: DBLockStorageBackend, executionContext: ExecutionContext, timer: Timer, haConfig: HaConfig, loggerFactory: NamedLoggerFactory)(implicit traceContext: TraceContext): HaCoordinator
This implementation of the HaCoordinator - provides a database lock based isolation of the protected executions - will run the execution at-most once during the entire lifecycle - will wait infinitely to acquire the lock needed to start the protected execution - provides a ConnectionInitializer function which is mandatory to execute on all worker connections during execution - will spawn a polling-daemon to observe continuous presence of the main lock
This implementation of the HaCoordinator - provides a database lock based isolation of the protected executions - will run the execution at-most once during the entire lifecycle - will wait infinitely to acquire the lock needed to start the protected execution - provides a ConnectionInitializer function which is mandatory to execute on all worker connections during execution - will spawn a polling-daemon to observe continuous presence of the main lock
- mainConnectionFactory
to spawn the main connection which keeps the Indexer Main Lock
- storageBackend
is the database-independent abstraction of session/connection level database locking
- executionContext
which is use to execute initialisation, will do blocking/IO work, so dedicated execution context is recommended
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