org.apache.zookeeper.cli.StatCommand Maven / Gradle / Ivy
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* 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.Options;
import org.apache.commons.cli.ParseException;
import org.apache.commons.cli.Parser;
import org.apache.commons.cli.PosixParser;
import org.apache.zookeeper.KeeperException;
import org.apache.zookeeper.data.Stat;
/**
* stat command for cli
*/
public class StatCommand extends CliCommand {
private static final Options options = new Options();
private String[] args;
private CommandLine cl;
static {
options.addOption("w", false, "watch");
}
public StatCommand() {
super("stat", "[-w] path");
}
@Override
public CliCommand parse(String[] cmdArgs) throws CliParseException {
Parser parser = new PosixParser();
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 {
// stat path [watch]
if (args.length > 2) {
// rewrite to option
cmdArgs[2] = "-w";
err.println("'stat path [watch]' has been deprecated. " + "Please use 'stat [-w] path' instead.");
Parser parser = new PosixParser();
try {
cl = parser.parse(options, cmdArgs);
} catch (ParseException ex) {
throw new CliParseException(ex);
}
args = cl.getArgs();
}
}
@Override
public boolean exec() throws CliException {
String path = args[1];
boolean watch = cl.hasOption("w");
Stat stat;
try {
stat = zk.exists(path, watch);
} catch (IllegalArgumentException ex) {
throw new MalformedPathException(ex.getMessage());
} catch (KeeperException | InterruptedException ex) {
throw new CliWrapperException(ex);
}
if (stat == null) {
throw new CliWrapperException(new KeeperException.NoNodeException(path));
}
new StatPrinter(out).print(stat);
return watch;
}
}