Module io.helidon.faulttolerance

Package io.helidon.faulttolerance

Class FtSupport.FallbackMethod<T>

java.lang.Object

io.helidon.faulttolerance.FtSupport.FallbackMethod<T>

Type Parameters:

T - service type

All Implemented Interfaces:

Interception.ElementInterceptor, Interception.Interceptor

Enclosing class:

FtSupport

public abstract static class FtSupport.FallbackMethod<T>
extends Object
implements Interception.ElementInterceptor

A base interceptor service implementation to support Fallback.

Nested Class Summary

Nested classes/interfaces inherited from interface io.helidon.service.registry.Interception.Interceptor

Interception.Interceptor.Chain<V>

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	FallbackMethod()	Constructor with no side effects.

Method Summary

Modifier and Type	Method	Description
protected abstract Object	fallback(T service, Throwable t, Object... params)	Implementation of the fallback for exceptions that are valid.
<V> V	proceed(InterceptionContext ctx, Interception.Interceptor.Chain<V> chain, Object... args)	Called during interception of the target V.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

FallbackMethod

protected FallbackMethod()

Constructor with no side effects.

Method Details

proceed

public <V> V proceed(InterceptionContext ctx,
 Interception.Interceptor.Chain<V> chain,
 Object... args)

Description copied from interface: Interception.Interceptor

Called during interception of the target V. The implementation typically should finish with the call to Interception.Interceptor.Chain.proceed(java.lang.Object[]).

Specified by:

proceed in interface Interception.Interceptor

Type Parameters:

V - the return value type (or Void for void method elements)

Parameters:

ctx - the invocation context

chain - the chain to call proceed on

args - the arguments to the call

Returns:

the return value to the caller

fallback

protected abstract Object fallback(T service,
 Throwable t,
 Object... params)
                            throws Throwable

Implementation of the fallback for exceptions that are valid.

Parameters:

service - service instance

t - throwable that was thrown

params - parameters of the method

Returns:

the expected result

Throws:

Throwable - throwable in case the provided t should be skipped