| /** |
| * 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.hbtop; |
| |
| import java.util.Objects; |
| |
| import org.apache.commons.cli.BasicParser; |
| import org.apache.commons.cli.CommandLine; |
| import org.apache.commons.cli.HelpFormatter; |
| import org.apache.commons.cli.Options; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.conf.Configured; |
| import org.apache.hadoop.hbase.HBaseConfiguration; |
| import org.apache.hadoop.hbase.HBaseInterfaceAudience; |
| import org.apache.hadoop.hbase.classification.InterfaceAudience; |
| import org.apache.hadoop.hbase.hbtop.mode.Mode; |
| import org.apache.hadoop.hbase.hbtop.screen.Screen; |
| import org.apache.hadoop.util.Tool; |
| import org.apache.hadoop.util.ToolRunner; |
| |
| /** |
| * A real-time monitoring tool for HBase like Unix top command. |
| */ |
| @InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.TOOLS) |
| public class HBTop extends Configured implements Tool { |
| |
| private static final Log LOG = LogFactory.getLog(HBTop.class); |
| |
| public HBTop() { |
| this(HBaseConfiguration.create()); |
| } |
| |
| public HBTop(Configuration conf) { |
| super(Objects.requireNonNull(conf)); |
| } |
| |
| @Override |
| public int run(String[] args) throws Exception { |
| long initialRefreshDelay = 3 * 1000; |
| Mode initialMode = Mode.REGION; |
| try { |
| // Command line options |
| Options opts = new Options(); |
| opts.addOption("h", "help", false, |
| "Print usage; for help while the tool is running press 'h'"); |
| opts.addOption("d", "delay", true, |
| "The refresh delay (in seconds); default is 3 seconds"); |
| opts.addOption("m", "mode", true, |
| "The mode; n (Namespace)|t (Table)|r (Region)|s (RegionServer)" |
| + ", default is r (Region)"); |
| |
| CommandLine commandLine = new BasicParser().parse(opts, args); |
| |
| if (commandLine.hasOption("help")) { |
| printUsage(opts); |
| return 0; |
| } |
| |
| if (commandLine.hasOption("delay")) { |
| int delay = 0; |
| try { |
| delay = Integer.parseInt(commandLine.getOptionValue("delay")); |
| } catch (NumberFormatException ignored) { |
| } |
| |
| if (delay < 1) { |
| LOG.warn("Delay set too low or invalid, using default"); |
| } else { |
| initialRefreshDelay = delay * 1000L; |
| } |
| } |
| |
| if (commandLine.hasOption("mode")) { |
| String mode = commandLine.getOptionValue("mode"); |
| switch (mode) { |
| case "n": |
| initialMode = Mode.NAMESPACE; |
| break; |
| |
| case "t": |
| initialMode = Mode.TABLE; |
| break; |
| |
| case "r": |
| initialMode = Mode.REGION; |
| break; |
| |
| case "s": |
| initialMode = Mode.REGION_SERVER; |
| break; |
| |
| default: |
| LOG.warn("Mode set invalid, using default"); |
| break; |
| } |
| } |
| } catch (Exception e) { |
| LOG.error("Unable to parse options", e); |
| return 1; |
| } |
| |
| try (Screen screen = new Screen(getConf(), initialRefreshDelay, initialMode)) { |
| screen.run(); |
| } |
| |
| return 0; |
| } |
| |
| private void printUsage(Options opts) { |
| new HelpFormatter().printHelp("hbase hbtop [opts] [-D<property=value>]*", opts); |
| System.out.println(""); |
| System.out.println(" Note: -D properties will be applied to the conf used."); |
| System.out.println(" For example:"); |
| System.out.println(" -Dhbase.client.zookeeper.quorum=<zookeeper quorum>"); |
| System.out.println(" -Dzookeeper.znode.parent=<znode parent>"); |
| System.out.println(""); |
| } |
| |
| public static void main(String[] args) throws Exception { |
| int res = ToolRunner.run(new HBTop(), args); |
| System.exit(res); |
| } |
| } |