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/*
* Copyright 2014 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 com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ArrayNode;
import org.apache.karaf.shell.commands.Argument;
import org.apache.karaf.shell.commands.Command;
import org.onosproject.cli.AbstractShellCommand;
import org.onosproject.net.Link;
import org.onosproject.net.Path;
import java.util.Set;
import static org.onosproject.cli.net.LinksListCommand.compactLinkString;
import static org.onosproject.net.DeviceId.deviceId;
/**
* Lists all shortest-paths paths between the specified source and
* destination devices.
*/
@Command(scope = "onos", name = "paths",
description = "Lists all shortest-paths paths between the specified source and destination devices")
public class PathListCommand extends TopologyCommand {
private static final String SEP = "==>";
@Argument(index = 0, name = "src", description = "Source device ID",
required = true, multiValued = false)
String src = null;
@Argument(index = 1, name = "dst", description = "Destination device ID",
required = true, multiValued = false)
String dst = null;
@Override
protected void execute() {
init();
Set<Path> paths = service.getPaths(topology, deviceId(src), deviceId(dst));
if (outputJson()) {
print("%s", json(this, paths));
} else {
for (Path path : paths) {
print(pathString(path));
}
}
}
/**
* Produces a JSON array containing the specified paths.
*
* @param context context to use for looking up codecs
* @param paths collection of paths
* @return JSON array
*/
public static JsonNode json(AbstractShellCommand context, Iterable<Path> paths) {
ObjectMapper mapper = new ObjectMapper();
ArrayNode result = mapper.createArrayNode();
for (Path path : paths) {
result.add(LinksListCommand.json(context, path)
.put("cost", path.cost())
.set("links", LinksListCommand.json(context, path.links())));
}
return result;
}
/**
* Produces a formatted string representing the specified path.
*
* @param path network path
* @return formatted path string
*/
protected String pathString(Path path) {
StringBuilder sb = new StringBuilder();
for (Link link : path.links()) {
sb.append(compactLinkString(link)).append(SEP);
}
sb.delete(sb.lastIndexOf(SEP), sb.length());
sb.append("; cost=").append(path.cost());
return sb.toString();
}
}
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