org.apache.flink.runtime.checkpoint.AbstractCheckpointStats Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* 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,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.flink.runtime.checkpoint;
import org.apache.flink.runtime.jobgraph.JobVertexID;
import javax.annotation.Nullable;
import java.io.Serializable;
import java.util.Collection;
import java.util.Map;
import static org.apache.flink.util.Preconditions.checkArgument;
import static org.apache.flink.util.Preconditions.checkNotNull;
/**
* Base class for checkpoint statistics.
*/
public abstract class AbstractCheckpointStats implements Serializable {
private static final long serialVersionUID = 1041218202028265151L;
/** ID of this checkpoint. */
final long checkpointId;
/** Timestamp when the checkpoint was triggered at the coordinator. */
final long triggerTimestamp;
/** {@link TaskStateStats} accessible by their ID. */
final Map taskStats;
/** Total number of subtasks over all tasks. */
final int numberOfSubtasks;
/** Properties of the checkpoint. */
final CheckpointProperties props;
AbstractCheckpointStats(
long checkpointId,
long triggerTimestamp,
CheckpointProperties props,
int numberOfSubtasks,
Map taskStats) {
this.checkpointId = checkpointId;
this.triggerTimestamp = triggerTimestamp;
this.taskStats = checkNotNull(taskStats);
checkArgument(taskStats.size() > 0, "Empty task stats");
checkArgument(numberOfSubtasks > 0, "Non-positive number of subtasks");
this.numberOfSubtasks = numberOfSubtasks;
this.props = checkNotNull(props);
}
/**
* Returns the status of this checkpoint.
*
* @return Status of this checkpoint
*/
public abstract CheckpointStatsStatus getStatus();
/**
* Returns the number of acknowledged subtasks.
*
* @return The number of acknowledged subtasks.
*/
public abstract int getNumberOfAcknowledgedSubtasks();
/**
* Returns the total checkpoint state size over all subtasks.
*
* @return Total checkpoint state size over all subtasks.
*/
public abstract long getStateSize();
/**
* Returns the latest acknowledged subtask stats or null if
* none was acknowledged yet.
*
* @return Latest acknowledged subtask stats or null
*/
@Nullable
public abstract SubtaskStateStats getLatestAcknowledgedSubtaskStats();
/**
* Returns the ID of this checkpoint.
*
* @return ID of this checkpoint.
*/
public long getCheckpointId() {
return checkpointId;
}
/**
* Returns the timestamp when the checkpoint was triggered.
*
* @return Timestamp when the checkpoint was triggered.
*/
public long getTriggerTimestamp() {
return triggerTimestamp;
}
/**
* Returns the properties of this checkpoint.
*
* @return Properties of this checkpoint.
*/
public CheckpointProperties getProperties() {
return props;
}
/**
* Returns the total number of subtasks involved in this checkpoint.
*
* @return Total number of subtasks involved in this checkpoint.
*/
public int getNumberOfSubtasks() {
return numberOfSubtasks;
}
/**
* Returns the task state stats for the given job vertex ID or
* null if no task with such an ID is available.
*
* @param jobVertexId Job vertex ID of the task stats to look up.
* @return The task state stats instance for the given ID or null.
*/
public TaskStateStats getTaskStateStats(JobVertexID jobVertexId) {
return taskStats.get(jobVertexId);
}
/**
* Returns all task state stats instances.
*
* @return All task state stats instances.
*/
public Collection getAllTaskStateStats() {
return taskStats.values();
}
/**
* Returns the ack timestamp of the latest acknowledged subtask or
* -1 if none was acknowledged yet.
*
* @return Ack timestamp of the latest acknowledged subtask or -1.
*/
public long getLatestAckTimestamp() {
SubtaskStateStats subtask = getLatestAcknowledgedSubtaskStats();
if (subtask != null) {
return subtask.getAckTimestamp();
} else {
return -1;
}
}
/**
* Returns the duration of this checkpoint calculated as the time since
* triggering until the latest acknowledged subtask or -1 if
* no subtask was acknowledged yet.
*
* @return Duration of this checkpoint or -1 if no subtask was acknowledged yet.
*/
public long getEndToEndDuration() {
SubtaskStateStats subtask = getLatestAcknowledgedSubtaskStats();
if (subtask != null) {
return Math.max(0, subtask.getAckTimestamp() - triggerTimestamp);
} else {
return -1;
}
}
}