Java Module java.base Package java.util.concurrent Interface RejectedExecutionHandler（JDK11）

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All Known Implementing Classes:

ThreadPoolExecutor.AbortPolicy, ThreadPoolExecutor.CallerRunsPolicy, ThreadPoolExecutor.DiscardOldestPolicy, ThreadPoolExecutor.DiscardPolicy
```
public interface RejectedExecutionHandler
```
A handler for tasks that cannot be executed by a ThreadPoolExecutor.

Since:

1.5

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`rejectedExecution(Runnable r, ThreadPoolExecutor executor)`	Method that may be invoked by a `ThreadPoolExecutor` when `execute` cannot accept a task.

- Method Detail
  - rejectedExecution
```
void rejectedExecution(Runnable r,
                       ThreadPoolExecutor executor)
```
    Method that may be invoked by a ThreadPoolExecutor when execute cannot accept a task. This may occur when no more threads or queue slots are available because their bounds would be exceeded, or upon shutdown of the Executor.
    In the absence of other alternatives, the method may throw an unchecked RejectedExecutionException, which will be propagated to the caller of execute.
    
    Parameters:
    
    r - the runnable task requested to be executed
    
    executor - the executor attempting to execute this task
    
    Throws:
    
    RejectedExecutionException - if there is no remedy

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