org.apache.flink.runtime.healthmanager.plugins.Resolver 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.healthmanager.plugins;

import org.apache.flink.runtime.healthmanager.HealthMonitor;

import java.util.List;

/**
 * Abnormal status resolver.
 */
public interface Resolver {

	/**
	 * Init the Detector, which may subscribe some metric from metric provider.
	 * @param monitor the HeathMonitor which loads the detector.
	 */
	void open(HealthMonitor monitor);

	/**
	 * Close the Detector.
	 */
	void close();

	/**
	 * Generate resolving action from the symptoms.
	 * @param symptomList symptoms detected.
	 * @return  action to resolve some of the symptoms, null if symptoms not matched.
	 */
	Action resolve(List symptomList);

}