AllocationID (Flink : Runtime 2.0-preview1 API)

java.lang.Object
- org.apache.flink.util.AbstractID
- - org.apache.flink.runtime.clusterframework.types.AllocationID

All Implemented Interfaces:

Serializable, Comparable<org.apache.flink.util.AbstractID>
```
public class AllocationID
extends org.apache.flink.util.AbstractID
```
Unique identifier for a physical slot allocated by a JobManager via the ResourceManager from a TaskManager. The ID is assigned once the JobManager (or its SlotPool) first requests the slot and is constant across retries.
This ID is used by the TaskManager and ResourceManager to track and synchronize which slots are allocated to which JobManager and which are free.
In contrast to this AllocationID, the SlotRequestId is used when a task requests a logical slot from the SlotPool. Multiple logical slot requests can map to one physical slot request (due to slot sharing).

See Also:

Serialized Form

Field Summary
- Fields inherited from class org.apache.flink.util.AbstractID
  lowerPart, SIZE, upperPart

Constructor Summary

Constructors
Constructor	Description
`AllocationID()`	Constructs a new random AllocationID.
`AllocationID(long lowerPart, long upperPart)`	Constructs a new AllocationID with the given parts.

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type Method Description

static AllocationID fromHexString(String hexString)
- Methods inherited from class org.apache.flink.util.AbstractID
  compareTo, equals, getBytes, getLowerPart, getUpperPart, hashCode, toHexString, toString
- Methods inherited from class java.lang.Object
  clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - AllocationID
```
public AllocationID()
```
    Constructs a new random AllocationID.
  - AllocationID
```
public AllocationID(long lowerPart,
                    long upperPart)
```
    Constructs a new AllocationID with the given parts.
    
    Parameters:
    
    lowerPart - the lower bytes of the ID
    
    upperPart - the higher bytes of the ID
- Method Detail
  - fromHexString
```
public static AllocationID fromHexString(String hexString)
```