org.apache.flink.runtime.state.gemini.engine.page.NoCriticalEvent Maven / Gradle / Ivy
/*
* 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.state.gemini.engine.page;
import javax.annotation.Nullable;
/**
* Currently used for no critical event, will print the detail info in {@link org.apache.flink.runtime.state.gemini.engine.vm.EvictPolicySepImpl}.
* we only track the last event, it is enough for now, in the future we'll extend this.
*
* TODO: In the future, we'll track multiple Exceptions, and other internal metrics, maybe we'll implement a runningState for tracking these info
* and replace the log in {@link org.apache.flink.runtime.state.gemini.engine.vm.EvictPolicySepImpl} use runningState.
*/
public class NoCriticalEvent {
/**
* Count of all pushed event.
*/
private long count = 0;
/**
* The timestamp of last pushed event.
*/
private long lastTimestamp = -1;
/**
* The last pushed event.
*/
private Exception lastException = null;
public NoCriticalEvent() {
}
public synchronized void pushEvent(Exception e, long timestamp) {
count++;
lastTimestamp = timestamp;
lastException = e;
}
@Nullable
public Exception getLastException() {
return lastException;
}
public long getCount() {
return count;
}
public long getLastTimestamp() {
return lastTimestamp;
}
}