BlocklistHandler (Flink : 2.0-SNAPSHOT API)

All Known Implementing Classes:

DefaultBlocklistHandler, NoOpBlocklistHandler
```
public interface BlocklistHandler
```
This class is responsible for managing all BlockedNodes and performing them on resources.

Nested Class Summary

Nested Classes
Modifier and Type Interface Description

static interface BlocklistHandler.Factory
Factory to instantiate BlocklistHandler.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`addNewBlockedNodes(Collection<BlockedNode> newNodes)`	Add new blocked node records.
`void`	`deregisterBlocklistListener(BlocklistListener blocklistListener)`	Deregister a blocklist listener.
`Set<String>`	`getAllBlockedNodeIds()`	Get all blocked node ids.
`boolean`	`isBlockedTaskManager(ResourceID taskManagerId)`	Returns whether the given task manager is blocked (located on blocked nodes).
`void`	`registerBlocklistListener(BlocklistListener blocklistListener)`	Register a new blocklist listener.

- Method Detail
  - addNewBlockedNodes
```
void addNewBlockedNodes(Collection<BlockedNode> newNodes)
```
    Add new blocked node records. If a node (identified by node id) already exists, the newly added one will be merged with the existing one.
    
    Parameters:
    
    newNodes - the new blocked node records
  - isBlockedTaskManager
```
boolean isBlockedTaskManager(ResourceID taskManagerId)
```
    Returns whether the given task manager is blocked (located on blocked nodes).
    
    Parameters:
    
    taskManagerId - ID of the task manager to query
    
    Returns:
    
    true if the given task manager is blocked, otherwise false
  - getAllBlockedNodeIds
```
Set<String> getAllBlockedNodeIds()
```
    Get all blocked node ids.
    
    Returns:
    
    a set containing all blocked node ids
  - registerBlocklistListener
```
void registerBlocklistListener(BlocklistListener blocklistListener)
```
    Register a new blocklist listener.
    
    Parameters:
    
    blocklistListener - the newly registered listener
  - deregisterBlocklistListener
```
void deregisterBlocklistListener(BlocklistListener blocklistListener)
```
    Deregister a blocklist listener.
    
    Parameters:
    
    blocklistListener - the listener to deregister