| /** |
| * |
| * 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.hbase.monitoring; |
| |
| import java.io.IOException; |
| import java.io.PrintWriter; |
| import java.util.Map; |
| |
| import javax.servlet.http.HttpServlet; |
| import javax.servlet.http.HttpServletRequest; |
| |
| import org.apache.hadoop.hbase.classification.InterfaceAudience; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hbase.executor.ExecutorService; |
| import org.apache.hadoop.hbase.executor.ExecutorService.ExecutorStatus; |
| import org.apache.hadoop.hbase.util.VersionInfo; |
| |
| @InterfaceAudience.Private |
| public abstract class StateDumpServlet extends HttpServlet { |
| static final long DEFAULT_TAIL_KB = 100; |
| private static final long serialVersionUID = 1L; |
| |
| protected void dumpVersionInfo(PrintWriter out) { |
| VersionInfo.writeTo(out); |
| |
| out.println("Hadoop " + org.apache.hadoop.util.VersionInfo.getVersion()); |
| out.println("Source code repository " + org.apache.hadoop.util.VersionInfo.getUrl() |
| + " revision=" + org.apache.hadoop.util.VersionInfo.getRevision()); |
| out.println("Compiled by " + org.apache.hadoop.util.VersionInfo.getUser() + |
| " on " + org.apache.hadoop.util.VersionInfo.getDate()); |
| } |
| |
| protected boolean isShowQueueDump(Configuration conf){ |
| return conf.getBoolean("hbase.regionserver.servlet.show.queuedump", true); |
| } |
| |
| protected long getTailKbParam(HttpServletRequest request) { |
| String param = request.getParameter("tailkb"); |
| if (param == null) { |
| return DEFAULT_TAIL_KB; |
| } |
| return Long.parseLong(param); |
| } |
| |
| protected void dumpExecutors(ExecutorService service, PrintWriter out) |
| throws IOException { |
| if (service == null) { |
| out.println("ExecutorService is not initialized"); |
| return; |
| } |
| |
| Map<String, ExecutorStatus> statuses = service.getAllExecutorStatuses(); |
| for (ExecutorStatus status : statuses.values()) { |
| status.dumpTo(out, " "); |
| } |
| } |
| } |