Call

Type Parameters:

R - result type

All Known Implementing Classes:

CallImpl
```
public interface Call<R>
```
A call that can perform Failsafe executions and can be cancelled. Cancellations are propagated to any cancelCallback that is registered. Useful for integrating with libraries that support cancellation.
To perform cancellable async executions, use the FailsafeExecutor async methods.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`cancel(boolean mayInterruptIfRunning)`	Cancels a synchronous execution and calls the most recent `cancelCallback` that was registered.
`R`	`execute()`	Executes the call until a successful result is returned or the configured policies are exceeded.
`boolean`	`isCancelled()`	Returns whether the call has been cancelled.

- Method Detail
  - execute
```
R execute()
```
    Executes the call until a successful result is returned or the configured policies are exceeded.
    
    Throws:
    
    FailsafeException - if the execution fails with a checked Exception. Throwable.getCause() can be used to learn the underlying checked exception.
  - cancel
```
boolean cancel(boolean mayInterruptIfRunning)
```
    Cancels a synchronous execution and calls the most recent cancelCallback that was registered. The execution is still allowed to complete and return a result. In addition to using a cancelCallback, executions can cooperate with cancellation by checking ExecutionContext.isCancelled().
    
    Parameters:
    
    mayInterruptIfRunning - whether the execution should be interrupted
    
    Returns:
    
    whether cancellation was successful or not. Returns false if the execution was already cancelled or completed.
  - isCancelled
```
boolean isCancelled()
```
    Returns whether the call has been cancelled.