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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;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ArrayNode;
import com.fasterxml.jackson.databind.node.ObjectNode;
import org.apache.karaf.shell.commands.Command;
import org.onosproject.cluster.NodeId;
import org.onosproject.cluster.RoleInfo;
import org.onosproject.mastership.MastershipService;
import org.onosproject.net.Device;
import org.onosproject.net.DeviceId;
import org.onosproject.net.device.DeviceService;
import java.util.List;
import static org.onosproject.cli.net.DevicesListCommand.getSortedDevices;
/**
* Lists mastership roles of nodes for each device.
*/
@Command(scope = "onos", name = "roles",
description = "Lists mastership roles of nodes for each device.")
public class RolesCommand extends AbstractShellCommand {
private static final String FMT_HDR = "%s: master=%s, standbys=[ %s]";
@Override
protected void execute() {
DeviceService deviceService = get(DeviceService.class);
MastershipService roleService = get(MastershipService.class);
if (outputJson()) {
print("%s", json(roleService, getSortedDevices(deviceService)));
} else {
for (Device d : getSortedDevices(deviceService)) {
DeviceId did = d.id();
printRoles(roleService, did);
}
}
}
// Produces JSON structure with role information for the given devices.
private JsonNode json(MastershipService service, List<Device> sortedDevices) {
ObjectMapper mapper = new ObjectMapper();
ArrayNode results = mapper.createArrayNode();
for (Device device : sortedDevices) {
results.add(json(service, mapper, device));
}
return results;
}
// Produces JSON structure with role information for the given device.
private JsonNode json(MastershipService service, ObjectMapper mapper,
Device device) {
NodeId master = service.getMasterFor(device.id());
ObjectNode result = mapper.createObjectNode()
.put("id", device.id().toString())
.put("master", master != null ? master.toString() : "none");
RoleInfo nodes = service.getNodesFor(device.id());
ArrayNode standbys = mapper.createArrayNode();
for (NodeId nid : nodes.backups()) {
standbys.add(nid.toString());
}
result.set("standbys", standbys);
return result;
}
/**
* Prints the role information for a device.
*
* @param service mastership service
* @param deviceId the ID of the device
*/
protected void printRoles(MastershipService service, DeviceId deviceId) {
RoleInfo nodes = service.getNodesFor(deviceId);
StringBuilder builder = new StringBuilder();
for (NodeId nid : nodes.backups()) {
builder.append(nid).append(" ");
}
print(FMT_HDR, deviceId,
nodes.master() == null ? "NONE" : nodes.master(),
builder.toString());
}
}
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