Package org.apache.bookkeeper.common.util

Util functions used across the project.

Interface Summary

Interface	Description
Backoff.Policy	Back off policy.
Recyclable	An interface represents an object that is recyclable.
ReferenceCounted	An interface for indicating an object is reference counted.
SafeRunnable	A runnable that catches runtime exceptions.
SharedResourceManager.Resource<T>	Defines a resource, and the way to create and destroy instances of it.
Watcher<T>	A class can implement the Watcher interface when it wants to be informed of one-time changes in watchable objects.

Class Summary

Class	Description
Backoff	Implements various backoff strategies.
Backoff.Constant	A constant backoff policy.
Backoff.Exponential	A exponential backoff policy.
Backoff.Jitter	A Jittered backoff policy.
BoundedExecutorService	Implements ExecutorService and allows limiting the number of tasks to be scheduled in the thread's queue.
BoundedScheduledExecutorService	Implements ListeningScheduledExecutorService and allows limiting the number of tasks to be scheduled in the thread's queue.
ExceptionMessageHelper	Utility to make it easier to add context to exception messages.
ExecutorUtils	Executor/Thread related utils.
JsonUtil	Util class which helps to parse Json to and from Object.
LogExceptionRunnable	A simple wrapper for a Runnable that logs any exception thrown by it, before re-throwing it.
MathUtils	Provides misc math functions that don't come standard.
MdcUtils	Utils for work with Slf4j MDC.
MemoryLimitController	Controller for tracking the amount of memory used for some task.
OrderedExecutor	This class supports submitting tasks with an ordering key, so that tasks submitted with the same key will always be executed in order, but tasks across different keys can be unordered.
OrderedExecutor.AbstractBuilder<T extends OrderedExecutor>	Abstract builder class to build OrderedScheduler.
OrderedExecutor.Builder	A builder class for an OrderedExecutor.
OrderedExecutor.ContextPreservingCallable<T>	Decorator class for a callable that preserves MDC context.
OrderedExecutor.ContextPreservingRunnable	Decorator class for a runnable that preserves MDC context.
OrderedScheduler	This class provides supports submitting tasks with an ordering key, so that tasks submitted with the same key will always be executed in order, but tasks across different keys can be unordered.
OrderedScheduler.SchedulerBuilder	Builder to build ordered scheduler.
ReflectionUtils	General Class Reflection Utils.
Retries	A util class for supporting retries with customized backoff.
SharedResourceManager	A holder for shared resource singletons.
SingleThreadExecutor	Implements a single thread executor that drains the queue in batches to minimize contention between threads.
SingleThreadSafeScheduledExecutorService
StreamUtil	Java Stream related operations.
Watchable<T>	This class represents an watchable object, or "data" in the model-view paradigm.

Enum Summary

Enum	Description
Backoff.Jitter.Type	Jitter type.
SingleThreadExecutor.State

Exception Summary

Exception	Description
JsonUtil.ParseJsonException	A JSON parsing exception.