| /** |
| * 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.hadoop.hdfs.qjournal.server; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| |
| import java.util.List; |
| |
| /** |
| * This is the JMX management interface for JournalNode information |
| */ |
| @InterfaceAudience.Public |
| @InterfaceStability.Evolving |
| public interface JournalNodeMXBean { |
| |
| /** |
| * Get status information (e.g., whether formatted) of JournalNode's journals. |
| * |
| * @return A string presenting status for each journal |
| */ |
| String getJournalsStatus(); |
| |
| /** |
| * Get host and port of JournalNode. |
| * |
| * @return colon separated host and port. |
| */ |
| String getHostAndPort(); |
| |
| /** |
| * Get list of the clusters of JournalNode's journals |
| * as one JournalNode may support multiple clusters. |
| * |
| * @return list of clusters. |
| */ |
| List<String> getClusterIds(); |
| |
| /** |
| * Gets the version of Hadoop. |
| * |
| * @return the version of Hadoop. |
| */ |
| String getVersion(); |
| } |