/**
* 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.whirr.cli.command;
import com.google.common.base.Joiner;
import com.google.common.collect.Iterables;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintStream;
import java.util.List;
import java.util.Set;
import joptsimple.OptionParser;
import joptsimple.OptionSet;
import org.apache.whirr.service.ClusterSpec;
import org.apache.whirr.service.Service;
import org.apache.whirr.service.ServiceFactory;
import org.jclouds.compute.domain.NodeMetadata;
/**
* A command to list the nodes in a cluster.
*/
public class ListClusterCommand extends AbstractClusterSpecCommand {
public ListClusterCommand() throws IOException {
this(new ServiceFactory());
}
public ListClusterCommand(ServiceFactory factory) {
super("list-cluster", "List the nodes in a cluster.", factory);
}
@Override
public int run(InputStream in, PrintStream out, PrintStream err,
List<String> args) throws Exception {
OptionSet optionSet = parser.parse(args.toArray(new String[0]));
if (!optionSet.nonOptionArguments().isEmpty()) {
printUsage(parser, err);
return -1;
}
try {
ClusterSpec clusterSpec = getClusterSpec(optionSet);
Service service = factory.create(clusterSpec.getServiceName());
Set<? extends NodeMetadata> nodes = service.getNodes(clusterSpec);
for (NodeMetadata node : nodes) {
out.println(Joiner.on('\t').join(node.getId(), node.getImageId(),
getFirstAddress(node.getPublicAddresses()),
getFirstAddress(node.getPrivateAddresses()),
node.getState(), node.getLocation().getId()));
}
return 0;
} catch (IllegalArgumentException e) {
err.println(e.getMessage());
printUsage(parser, err);
return -1;
}
}
private String getFirstAddress(Set<String> addresses) {
return addresses.isEmpty() ? "" : Iterables.get(addresses, 0);
}
private void printUsage(OptionParser parser, PrintStream stream) throws IOException {
stream.println("Usage: whirr list-cluster [OPTIONS]");
stream.println();
parser.printHelpOn(stream);
}
}