org.apache.heron.spi.statefulstorage.CheckpointInfo 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
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* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.heron.spi.statefulstorage;
import org.apache.heron.proto.system.PhysicalPlans;
/**
* The information for one checkpoint blob. It can be used to reference checkpoint and
* metadata (instance id is ignored).
*/
public class CheckpointInfo {
// The checkpoint ID under the topology.
private final String checkpointId;
// The name of the component.
private final String componentName;
// TODO(nwang): Currently only support one partition per instance.
private final int instanceId;
public CheckpointInfo(String checkpointId, PhysicalPlans.Instance instance) {
this.checkpointId = checkpointId;
this.componentName = instance.getInfo().getComponentName();
this.instanceId = instance.getInfo().getComponentIndex();
}
public String getCheckpointId() {
return checkpointId;
}
public String getComponent() {
return componentName;
}
public int getInstanceId() {
return instanceId;
}
@Override
public String toString() {
return String.format("CheckpointInfo(%s %s %d)",
checkpointId, componentName, instanceId);
}
}