FailoverPolicy (hector-core 2.0-0 API)

```
public class FailoverPolicy<E extends Throwable>
extends Object
```
What should the client do if a call to cassandra node fails and we suspect that the node is down. (e.g. it's a communication error, not an application error). will return the error as is to the user and not try anything smart will try one more random server before returning to the user with an error will try all available servers in the cluster before giving up and returning the communication error to the user.

Fields
Modifier and Type	Field and Description
`Set<Class<E>>`	`dontRetry` Optional set of classes representing Exceptions/Errors for which retry should not happen.
`static FailoverPolicy`	`FAIL_FAST` On communication failure, just return the error to the client and don't retry
`int`	`numRetries`
`static FailoverPolicy`	`ON_FAIL_TRY_ALL_AVAILABLE` On communication error try all known servers before giving up
`static FailoverPolicy`	`ON_FAIL_TRY_ONE_NEXT_AVAILABLE` On communication error try one more server before giving up
`int`	`sleepBetweenHostsMilli`

Constructors
Constructor and Description
`FailoverPolicy(int numRetries, int sleepBwHostsMilli)`
`FailoverPolicy(int numRetries, int sleepBwHostsMilli, Class<E> dontRetryForType)`
`FailoverPolicy(int numRetries, int sleepBwHostsMilli, Set<Class<E>> dontRetryForTypes)`

Methods
Modifier and Type	Method and Description
`boolean`	`shouldRetryFor(Class<E> candidate)` Determines if a given class is an exception or error that this FailoverPolicy supports retry for.

public FailoverPolicy(int numRetries,
              int sleepBwHostsMilli)

public FailoverPolicy(int numRetries,
              int sleepBwHostsMilli,
              Class<E> dontRetryForType)

public FailoverPolicy(int numRetries,
              int sleepBwHostsMilli,
              Set<Class<E>> dontRetryForTypes)

Class FailoverPolicy<E extends Throwable>