org.apache.flink.runtime.clusterframework.types.TaskManagerSlot Maven / Gradle / Ivy
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* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
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*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
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* limitations under the License.
*/
package org.apache.flink.runtime.clusterframework.types;
import org.apache.flink.api.common.JobID;
import org.apache.flink.runtime.instance.InstanceID;
import org.apache.flink.runtime.resourcemanager.registration.TaskExecutorConnection;
import org.apache.flink.runtime.resourcemanager.slotmanager.PendingSlotRequest;
import org.apache.flink.util.Preconditions;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.annotation.Nullable;
import java.util.Objects;
import static org.apache.flink.util.Preconditions.checkNotNull;
/**
* A TaskManagerSlot represents a slot located in a TaskManager. It has a unique identification and
* resource profile associated.
*/
public class TaskManagerSlot {
private static final Logger LOG = LoggerFactory.getLogger(TaskManagerSlot.class);
/** The unique identification of this slot. */
private final SlotID slotId;
/** The resource profile of this slot. */
private final ResourceProfile resourceProfile;
/** Gateway to the TaskExecutor which owns the slot. */
private final TaskExecutorConnection taskManagerConnection;
/** Allocation id for which this slot has been allocated. */
private AllocationID allocationId;
/** Allocation id for which this slot has been allocated. */
@Nullable
private JobID jobId;
/** Assigned slot request if there is currently an ongoing request. */
private PendingSlotRequest assignedSlotRequest;
private State state;
private long version;
public TaskManagerSlot(
SlotID slotId,
ResourceProfile resourceProfile,
TaskExecutorConnection taskManagerConnection,
long initialVersion) {
this.slotId = checkNotNull(slotId);
this.resourceProfile = checkNotNull(resourceProfile);
this.taskManagerConnection = checkNotNull(taskManagerConnection);
this.state = State.FREE;
this.allocationId = null;
this.assignedSlotRequest = null;
this.version = initialVersion;
}
public State getState() {
return state;
}
public long getVersion() {
return version;
}
public SlotID getSlotId() {
return slotId;
}
public ResourceProfile getResourceProfile() {
return resourceProfile;
}
public TaskExecutorConnection getTaskManagerConnection() {
return taskManagerConnection;
}
public AllocationID getAllocationId() {
return allocationId;
}
@Nullable
public JobID getJobId() {
return jobId;
}
public PendingSlotRequest getAssignedSlotRequest() {
return assignedSlotRequest;
}
public InstanceID getInstanceId() {
return taskManagerConnection.getInstanceID();
}
public void increaseVersion() {
//TODO: handling overflow for long-running session.
version += 1;
}
public void freeSlot() {
Preconditions.checkState(state == State.ALLOCATED, "Slot must be allocated before freeing it.");
LOG.debug("Free slot {}", this);
state = State.FREE;
allocationId = null;
jobId = null;
}
public void clearPendingSlotRequest() {
Preconditions.checkState(state == State.PENDING || state == State.SYNCING, "No slot request to clear.");
state = State.FREE;
assignedSlotRequest = null;
}
public void syncPendingSlotRequest() {
Preconditions.checkState(state == State.PENDING, "No slot request to syncing.");
state = State.SYNCING;
LOG.debug("Sync pending slot {}", this);
}
public void assignPendingSlotRequest(PendingSlotRequest pendingSlotRequest) {
Preconditions.checkState(state == State.FREE, "Slot must be free to be assigned a slot request.");
state = State.PENDING;
assignedSlotRequest = Preconditions.checkNotNull(pendingSlotRequest);
LOG.debug("Assign pending slot {}", this);
}
public void completeAllocation(AllocationID allocationId, JobID jobId) {
Preconditions.checkNotNull(allocationId, "Allocation id must not be null.");
Preconditions.checkNotNull(jobId, "Job id must not be null.");
Preconditions.checkState(state == State.PENDING, "In order to complete an allocation, the slot has to be allocated.");
Preconditions.checkState(Objects.equals(allocationId, assignedSlotRequest.getAllocationId()), "Mismatch between allocation id of the pending slot request.");
state = State.ALLOCATED;
this.allocationId = allocationId;
this.jobId = jobId;
assignedSlotRequest = null;
LOG.debug("Complete allocation for slot {}", this);
}
public void updateAllocation(AllocationID allocationId, JobID jobId) {
Preconditions.checkState(state == State.FREE, "The slot has to be free in order to set an allocation id.");
state = State.ALLOCATED;
this.allocationId = Preconditions.checkNotNull(allocationId);
this.jobId = Preconditions.checkNotNull(jobId);
LOG.debug("Update allocation for slot {}", this);
}
public void syncState(State state) {
Preconditions.checkState(this.state == State.SYNCING);
this.state = state;
LOG.debug("Syncing state to {}", state);
}
/**
* Check whether required resource profile can be matched by this slot.
*
* @param required The required resource profile
* @return true if requirement can be matched
*/
public boolean isMatchingRequirement(ResourceProfile required) {
return resourceProfile.isMatching(required);
}
/**
* State of the {@link TaskManagerSlot}.
*/
public enum State {
FREE,
PENDING,
SYNCING,
ALLOCATED
}
@Override
public String toString() {
return "Slot " + slotId + " [" + allocationId + " with " + state + "]";
}
}