CompletedOperationCache (Flink : Runtime 2.1.1 API)

java.lang.Object
- org.apache.flink.runtime.rest.handler.async.CompletedOperationCache<K,R>

All Implemented Interfaces:

AutoCloseable, org.apache.flink.util.AutoCloseableAsync
```
@ThreadSafe
public class CompletedOperationCache<K extends OperationKey,R extends Serializable>
extends Object
implements org.apache.flink.util.AutoCloseableAsync
```
Cache to manage ongoing operations.
The cache allows to register ongoing operations by calling #registerOngoingOperation(K, CompletableFuture), where the CompletableFuture contains the operation result. Completed operations will be removed from the cache automatically after a fixed timeout.

Constructor Summary

Constructors
Constructor Description

CompletedOperationCache(Duration cacheDuration)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`CompletableFuture<Void>`	`closeAsync()`
`boolean`	`containsOperation(K operationKey)`	Returns whether this cache contains an operation under the given operation key.
`Optional<OperationResult<R>>`	`get(K operationKey)`	Returns an optional containing the `OperationResult` for the specified key, or an empty optional if no operation is registered under the key.
`void`	`registerOngoingOperation(K operationKey, CompletableFuture<R> operationResultFuture)`	Registers an ongoing operation with the cache.

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

Methods inherited from interface org.apache.flink.util.AutoCloseableAsync
close

- Constructor Detail
  - CompletedOperationCache
```
public CompletedOperationCache(Duration cacheDuration)
```
- Method Detail
  - registerOngoingOperation
```
public void registerOngoingOperation(K operationKey,
                                     CompletableFuture<R> operationResultFuture)
```
    Registers an ongoing operation with the cache.
    
    Parameters:
    
    operationResultFuture - A future containing the operation result.
    
    Throws:
    
    IllegalStateException - if the cache is already shutting down
  - containsOperation
```
public boolean containsOperation(K operationKey)
```
    Returns whether this cache contains an operation under the given operation key.
  - get
```
public Optional<OperationResult<R>> get(K operationKey)
```
    Returns an optional containing the OperationResult for the specified key, or an empty optional if no operation is registered under the key.
  - closeAsync
```
public CompletableFuture<Void> closeAsync()
```
    Specified by:
    
    closeAsync in interface org.apache.flink.util.AutoCloseableAsync