Module io.helidon.faulttolerance

Package io.helidon.faulttolerance

Fault tolerance for Helidon SE reactive implementation.

Interface Summary

Interface	Description
Async	Support for asynchronous execution of synchronous (blocking) calls.
Bulkhead	Bulkhead protects a resource that cannot serve unlimited parallel requests.
Bulkhead.Stats	Provides statistics during the lifetime of a bulkhead, such as concurrent executions, accepted/rejected calls and queue size.
CircuitBreaker	CircuitBreaker protects a potentially failing endpoint from overloading and the application from spending resources on those endpoints.
Fallback<T>	Fallback allows the user to execute an alternative function in case the provided supplier fails.
FtHandler	A fault tolerance handler.
FtHandlerTyped<T>	A typed fault tolerance handler, to allow combination of multiple handlers without losing type information.
Retry	Retry supports retry policies to be applied on an execution of asynchronous tasks.
Retry.RetryPolicy	Retry policy to handle delays between retries.
Timeout	Timeout attempts to terminate execution after a duration time passes.

Class Summary

Class	Description
Async.Builder	Fluent API Builder for Async.
Bulkhead.Builder	Fluent API builder for Bulkhead.
CircuitBreaker.Builder	Fluent API builder for CircuitBreaker.
Fallback.Builder<T>	Fluent API builder for Fallback.
FaultTolerance	System wide fault tolerance configuration and access to a customized sequence of fault tolerance handlers.
FaultTolerance.Builder	A builder used for setting up a customized list of fault tolerance handlers.
FaultTolerance.TypedBuilder<T>	A builder used for fault tolerance handlers that require a specific type to be used, such as Fallback.
Retry.Builder	Fluent API builder for Retry.
Retry.DelayingRetryPolicy	A retry policy that prolongs the delays between retries by a defined factor.
Retry.DelayingRetryPolicy.Builder	Fluent API builder for Retry.DelayingRetryPolicy.
Retry.ExponentialRetryPolicy	A retry policy that increases the delay time following an exponential sequence.
Retry.ExponentialRetryPolicy.Builder	Fluent API builder for Retry.ExponentialRetryPolicy.
Retry.FibonacciRetryPolicy	A retry policy that increases the delay time following the Fibonacci sequence.
Retry.FibonacciRetryPolicy.Builder	Fluent API builder for Retry.FibonacciRetryPolicy.
Retry.JitterRetryPolicy	A retry policy that randomizes delays between execution using a "jitter" time.
Retry.JitterRetryPolicy.Builder	Fluent API builder for Retry.JitterRetryPolicy.
Timeout.Builder	Fluent API builder for Timeout.

Enum Summary

Enum	Description
CircuitBreaker.State	A circuit breaker can be in any of 3 possible states as defined by this enum.

Exception Summary

Exception	Description
BulkheadException	Failure because of Bulkhead issues, most likely that the bulkhead does not allow any more queued tasks.
CircuitBreakerOpenException	Failure because CircuitBreaker is open and does not accept requests.