org.apache.zookeeper.cli.AddWatchCommand 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 java.util.Arrays;
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.AddWatchMode;
import org.apache.zookeeper.KeeperException;
/**
* addWatch command for cli.
* Matches the ZooKeeper API addWatch()
*/
public class AddWatchCommand extends CliCommand {
private static final Options options = new Options();
private static final AddWatchMode defaultMode = AddWatchMode.PERSISTENT_RECURSIVE;
private CommandLine cl;
private AddWatchMode mode = defaultMode;
static {
options.addOption("m", true, "");
}
public AddWatchCommand() {
super("addWatch", "[-m mode] path # optional mode is one of "
+ Arrays.toString(AddWatchMode.values()) + " - default is " + defaultMode.name());
}
@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);
}
if (cl.getArgs().length != 2) {
throw new CliParseException(getUsageStr());
}
if (cl.hasOption("m")) {
try {
mode = AddWatchMode.valueOf(cl.getOptionValue("m").toUpperCase());
} catch (IllegalArgumentException e) {
throw new CliParseException(getUsageStr());
}
}
return this;
}
@Override
public boolean exec() throws CliException {
String path = cl.getArgs()[1];
try {
zk.addWatch(path, mode);
} catch (KeeperException | InterruptedException ex) {
throw new CliWrapperException(ex);
}
return false;
}
}