| /* |
| * 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.zookeeper.cli; |
| |
| import java.util.Collections; |
| import java.util.List; |
| import org.apache.commons.cli.CommandLine; |
| import org.apache.commons.cli.DefaultParser; |
| import org.apache.commons.cli.HelpFormatter; |
| import org.apache.commons.cli.Options; |
| import org.apache.commons.cli.ParseException; |
| import org.apache.zookeeper.KeeperException; |
| import org.apache.zookeeper.ZKUtil; |
| import org.apache.zookeeper.data.Stat; |
| |
| /** |
| * ls command for cli |
| */ |
| public class LsCommand extends CliCommand { |
| |
| private static Options options = new Options(); |
| private String[] args; |
| private CommandLine cl; |
| |
| static { |
| options.addOption("?", false, "help"); |
| options.addOption("s", false, "stat"); |
| options.addOption("w", false, "watch"); |
| options.addOption("R", false, "recurse"); |
| } |
| |
| public LsCommand() { |
| super("ls", "[-s] [-w] [-R] path"); |
| } |
| |
| private void printHelp() { |
| HelpFormatter formatter = new HelpFormatter(); |
| formatter.printHelp("ls [options] path", options); |
| } |
| |
| @Override |
| public CliCommand parse(String[] cmdArgs) throws CliParseException { |
| DefaultParser parser = new DefaultParser(); |
| try { |
| cl = parser.parse(options, cmdArgs); |
| } catch (ParseException ex) { |
| throw new CliParseException(ex); |
| } |
| |
| args = cl.getArgs(); |
| if (cl.hasOption("?")) { |
| printHelp(); |
| } |
| |
| retainCompatibility(cmdArgs); |
| |
| return this; |
| } |
| |
| private void retainCompatibility(String[] cmdArgs) throws CliParseException { |
| // get path [watch] |
| if (args.length > 2) { |
| // rewrite to option |
| cmdArgs[2] = "-w"; |
| err.println("'ls path [watch]' has been deprecated. " + "Please use 'ls [-w] path' instead."); |
| DefaultParser parser = new DefaultParser(); |
| try { |
| cl = parser.parse(options, cmdArgs); |
| } catch (ParseException ex) { |
| throw new CliParseException(ex); |
| } |
| args = cl.getArgs(); |
| } |
| } |
| |
| @Override |
| public boolean exec() throws CliException { |
| if (args.length < 2) { |
| throw new MalformedCommandException(getUsageStr()); |
| } |
| |
| String path = args[1]; |
| boolean watch = cl.hasOption("w"); |
| boolean withStat = cl.hasOption("s"); |
| boolean recursive = cl.hasOption("R"); |
| try { |
| if (recursive) { |
| ZKUtil.visitSubTreeDFS(zk, path, watch, (rc, path1, ctx, name) -> out.println(path1)); |
| } else { |
| Stat stat = withStat ? new Stat() : null; |
| List<String> children = zk.getChildren(path, watch, stat); |
| printChildren(children, stat); |
| } |
| } catch (IllegalArgumentException ex) { |
| throw new MalformedPathException(ex.getMessage()); |
| } catch (KeeperException | InterruptedException ex) { |
| throw new CliWrapperException(ex); |
| } |
| return watch; |
| } |
| |
| private void printChildren(List<String> children, Stat stat) { |
| Collections.sort(children); |
| out.append("["); |
| boolean first = true; |
| for (String child : children) { |
| if (!first) { |
| out.append(", "); |
| } else { |
| first = false; |
| } |
| out.append(child); |
| } |
| out.append("]\n"); |
| if (stat != null) { |
| new StatPrinter(out).print(stat); |
| } |
| } |
| |
| } |