org.apache.flink.runtime.clusterframework.types.AllocationID Maven / Gradle / Ivy
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* to you under the Apache License, Version 2.0 (the
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* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
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*/
package org.apache.flink.runtime.clusterframework.types;
import 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 {@link org.apache.flink.runtime.jobmaster.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).
*/
public class AllocationID extends AbstractID {
private static final long serialVersionUID = 1L;
/**
* Constructs a new random AllocationID.
*/
public AllocationID() {
super();
}
/**
* Constructs a new AllocationID with the given parts.
*
* @param lowerPart the lower bytes of the ID
* @param upperPart the higher bytes of the ID
*/
public AllocationID(long lowerPart, long upperPart) {
super(lowerPart, upperPart);
}
}