| /* |
| * 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 org.apache.commons.cli.CommandLine; |
| import org.apache.commons.cli.DefaultParser; |
| import org.apache.commons.cli.Options; |
| import org.apache.commons.cli.ParseException; |
| import org.apache.zookeeper.KeeperException; |
| import org.apache.zookeeper.data.Stat; |
| |
| /** |
| * get command for cli |
| */ |
| public class GetCommand extends CliCommand { |
| |
| private static Options options = new Options(); |
| private String[] args; |
| private CommandLine cl; |
| |
| static { |
| options.addOption("s", false, "stats"); |
| options.addOption("w", false, "watch"); |
| } |
| |
| public GetCommand() { |
| super("get", "[-s] [-w] path"); |
| } |
| |
| @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 (args.length < 2) { |
| throw new CliParseException(getUsageStr()); |
| } |
| |
| 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("'get path [watch]' has been deprecated. " + "Please use 'get [-s] [-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 { |
| boolean watch = cl.hasOption("w"); |
| String path = args[1]; |
| Stat stat = new Stat(); |
| byte[] data; |
| try { |
| data = zk.getData(path, watch, stat); |
| } catch (IllegalArgumentException ex) { |
| throw new MalformedPathException(ex.getMessage()); |
| } catch (KeeperException | InterruptedException ex) { |
| throw new CliException(ex); |
| } |
| data = (data == null) ? "null".getBytes() : data; |
| out.println(new String(data)); |
| if (cl.hasOption("s")) { |
| new StatPrinter(out).print(stat); |
| } |
| return watch; |
| } |
| |
| } |