GridCacheSemaphoreEx (Ignite 2.17.0)

All Superinterfaces:

AutoCloseable, Closeable, GridCacheRemovable, IgniteSemaphore

All Known Implementing Classes:

GridCacheSemaphoreImpl
```
public interface GridCacheSemaphoreEx
extends IgniteSemaphore, GridCacheRemovable
```
Grid cache semaphore ('Ex' stands for external).

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`GridCacheInternalKey`	`key()`	Get current semaphore key.
`void`	`onNodeRemoved(UUID nodeId)`	Callback to notify semaphore on topology changes.
`void`	`onUpdate(GridCacheSemaphoreState val)`	Callback to notify semaphore on changes.
`void`	`stop()`	Callback to notify local semaphore instance on node stop.

Methods inherited from interface org.apache.ignite.internal.processors.datastructures.GridCacheRemovable
needCheckNotRemoved, onRemoved, restart, suspend

Methods inherited from interface org.apache.ignite.IgniteSemaphore
acquire, acquire, acquireAndExecute, acquireUninterruptibly, acquireUninterruptibly, availablePermits, close, drainPermits, getQueueLength, hasQueuedThreads, isBroken, isFailoverSafe, name, release, release, removed, tryAcquire, tryAcquire, tryAcquire, tryAcquire

- Method Detail
  - key
```
GridCacheInternalKey key()
```
    Get current semaphore key.
    
    Returns:
    
    Semaphore key.
  - onUpdate
```
void onUpdate(GridCacheSemaphoreState val)
```
    Callback to notify semaphore on changes.
    
    Parameters:
    
    val - State containing the number of available permissions.
  - onNodeRemoved
```
void onNodeRemoved(UUID nodeId)
```
    Callback to notify semaphore on topology changes.
    
    Parameters:
    
    nodeId - Id of the node that left the grid.
  - stop
```
void stop()
```
    Callback to notify local semaphore instance on node stop.