| /* |
| * 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.onlab.onos.cli; |
| |
| import com.fasterxml.jackson.databind.ObjectMapper; |
| import com.fasterxml.jackson.databind.node.ObjectNode; |
| import org.apache.karaf.shell.commands.Option; |
| import org.apache.karaf.shell.console.OsgiCommandSupport; |
| import org.onlab.onos.ApplicationId; |
| import org.onlab.onos.CoreService; |
| import org.onlab.onos.net.Annotations; |
| import org.onlab.osgi.DefaultServiceDirectory; |
| import org.onlab.osgi.ServiceNotFoundException; |
| |
| /** |
| * Base abstraction of Karaf shell commands. |
| */ |
| public abstract class AbstractShellCommand extends OsgiCommandSupport { |
| |
| @Option(name = "-j", aliases = "--json", description = "Output JSON", |
| required = false, multiValued = false) |
| private boolean json = false; |
| |
| /** |
| * Returns the reference to the implementation of the specified service. |
| * |
| * @param serviceClass service class |
| * @param <T> type of service |
| * @return service implementation |
| * @throws org.onlab.osgi.ServiceNotFoundException if service is unavailable |
| */ |
| public static <T> T get(Class<T> serviceClass) { |
| return DefaultServiceDirectory.getService(serviceClass); |
| } |
| |
| /** |
| * Returns application ID for the CLI. |
| * |
| * @return command-line application identifier |
| */ |
| protected ApplicationId appId() { |
| return get(CoreService.class).registerApplication("org.onlab.onos.cli"); |
| } |
| |
| /** |
| * Prints the arguments using the specified format. |
| * |
| * @param format format string; see {@link String#format} |
| * @param args arguments |
| */ |
| public void print(String format, Object... args) { |
| System.out.println(String.format(format, args)); |
| } |
| |
| /** |
| * Prints the arguments using the specified format to error stream. |
| * |
| * @param format format string; see {@link String#format} |
| * @param args arguments |
| */ |
| public void error(String format, Object... args) { |
| System.err.println(String.format(format, args)); |
| } |
| |
| /** |
| * Produces a string image of the specified key/value annotations. |
| * |
| * @param annotations key/value annotations |
| * @return string image with ", k1=v1, k2=v2, ..." pairs |
| */ |
| public static String annotations(Annotations annotations) { |
| StringBuilder sb = new StringBuilder(); |
| for (String key : annotations.keys()) { |
| sb.append(", ").append(key).append('=').append(annotations.value(key)); |
| } |
| return sb.toString(); |
| } |
| |
| /** |
| * Produces a JSON object from the specified key/value annotations. |
| * |
| * @param annotations key/value annotations |
| * @return JSON object |
| */ |
| public static ObjectNode annotations(ObjectMapper mapper, Annotations annotations) { |
| ObjectNode result = mapper.createObjectNode(); |
| for (String key : annotations.keys()) { |
| result.put(key, annotations.value(key)); |
| } |
| return result; |
| } |
| |
| /** |
| * Executes this command. |
| */ |
| protected abstract void execute(); |
| |
| /** |
| * Indicates whether JSON format should be output. |
| * |
| * @return true if JSON is requested |
| */ |
| protected boolean outputJson() { |
| return json; |
| } |
| |
| @Override |
| protected Object doExecute() throws Exception { |
| try { |
| execute(); |
| } catch (ServiceNotFoundException e) { |
| error(e.getMessage()); |
| } |
| return null; |
| } |
| |
| } |