FaultTolerance (Helidon Project 2.0.2 API)

java.lang.Object
- io.helidon.faulttolerance.FaultTolerance

```
public final class FaultTolerance
extends Object
```
System wide fault tolerance configuration and access to a customized sequence of fault tolerance handlers.
Fault tolerance provides the following features:
- Async - invoke a blocking synchronous call asynchronously in an executor service
- Bulkhead - limit number of parallel requests to a resource
- CircuitBreaker - stop trying to request a failing resource until it becomes available
- Fallback - fall back to another supplier of result in case the usual one fails
- Retry - try to call a supplier again if invocation fails
- Timeout - time out a request if it takes too long
See Also:

config(io.helidon.config.Config), scheduledExecutor(java.util.function.Supplier), executor(), builder()

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`static class`	`FaultTolerance.Builder`	A builder used for setting up a customized list of fault tolerance handlers.
`static class`	`FaultTolerance.TypedBuilder<T>`	A builder used for fault tolerance handlers that require a specific type to be used, such as `Fallback`.

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static FaultTolerance.Builder`	`builder()`	A builder to configure a customized sequence of fault tolerance handlers.
`static void`	`config(Config config)`	Configure Helidon wide defaults from a config instance.
`static void`	`executor(Supplier<? extends ExecutorService> executor)`	Configure Helidon wide executor service for Fault Tolerance.
`static void`	`scheduledExecutor(Supplier<? extends ScheduledExecutorService> executor)`	Configure Helidon wide scheduled executor service for Fault Tolerance.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - config
```
public static void config(Config config)
```
    Configure Helidon wide defaults from a config instance.
    
    Parameters:
    
    config - config to read fault tolerance configuration
  - executor
```
public static void executor(Supplier<? extends ExecutorService> executor)
```
    Configure Helidon wide executor service for Fault Tolerance.
    
    Parameters:
    
    executor - executor service to use, such as for Async
  - scheduledExecutor
```
public static void scheduledExecutor(Supplier<? extends ScheduledExecutorService> executor)
```
    Configure Helidon wide scheduled executor service for Fault Tolerance.
    
    Parameters:
    
    executor - scheduled executor service to use, such as for Retry scheduling
  - builder
```
public static FaultTolerance.Builder builder()
```
    A builder to configure a customized sequence of fault tolerance handlers.
    
    Returns:
    
    a new builder