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/*
* Copyright 2014-2015 Open Networking Laboratory
*
* Licensed 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.onosproject.cli.net;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.concurrent.TimeUnit;
import org.apache.karaf.shell.commands.Command;
import org.apache.karaf.shell.commands.Option;
import org.onosproject.cli.AbstractShellCommand;
import org.onosproject.net.topology.Topology;
import org.onosproject.net.topology.TopologyProvider;
import org.onosproject.net.topology.TopologyService;
/**
* Lists summary of the current topology.
*/
@Command(scope = "onos", name = "topology",
description = "Lists summary of the current topology")
public class TopologyCommand extends AbstractShellCommand {
private static final String FMT = "created=%s, uptime=%s, devices=%d, links=%d, clusters=%d";
@Option(name = "-r", aliases = "--recompute",
description = "Trigger topology re-computation", required = false,
multiValued = false)
private boolean recompute = false;
protected TopologyService service;
protected Topology topology;
/**
* Initializes the context for all cluster commands.
*/
protected void init() {
service = get(TopologyService.class);
topology = service.currentTopology();
}
@Override
protected void execute() {
init();
long topologyUptime =
Math.max(0, (System.currentTimeMillis() - topology.creationTime()));
if (recompute) {
get(TopologyProvider.class).triggerRecompute();
} else if (outputJson()) {
print("%s",
jsonForEntity(topology, Topology.class));
} else {
print(FMT, formatCreationTime(topology.creationTime()),
formatElapsedTime(topologyUptime),
topology.deviceCount(), topology.linkCount(),
topology.clusterCount());
}
}
/**
* Converts millis to a formatted elapsed time string.
*
* @param millis Duration in millis to convert to a string
*
* @return Formatted string: "D days, H hrs, M mins, S secs".
*/
private static String formatElapsedTime(long millis) {
if (millis < 0) {
throw new IllegalArgumentException("Interval less than zero. "
+ "Possible unsynchronized timestamps");
}
final long days = TimeUnit.MILLISECONDS.toDays(millis);
millis -= TimeUnit.DAYS.toMillis(days);
final long hours = TimeUnit.MILLISECONDS.toHours(millis);
millis -= TimeUnit.HOURS.toMillis(hours);
final long minutes = TimeUnit.MILLISECONDS.toMinutes(millis);
millis -= TimeUnit.MINUTES.toMillis(minutes);
final long seconds = TimeUnit.MILLISECONDS.toSeconds(millis);
final StringBuilder topologyUptimeString = new StringBuilder(64);
topologyUptimeString.append(days);
topologyUptimeString.append(" days, ");
topologyUptimeString.append(hours);
topologyUptimeString.append(" hrs, ");
topologyUptimeString.append(minutes);
topologyUptimeString.append(" mins, ");
topologyUptimeString.append(seconds);
topologyUptimeString.append(" secs");
return (topologyUptimeString.toString());
}
/**
* Converts millis to a formatted Date String.
*
* @param millis Duration in millis to convert to a string
*
* @return Formatted string: yyyy-MM-dd HH:mm:ss.
*/
private static String formatCreationTime(long millis) {
final DateFormat dateFormatter =
new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(millis);
return (dateFormatter.format(calendar.getTime()));
}
}
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