| /* |
| * 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.fluo.command; |
| |
| import java.util.Collections; |
| import java.util.List; |
| |
| import com.beust.jcommander.Parameters; |
| import org.apache.curator.framework.CuratorFramework; |
| import org.apache.fluo.api.config.FluoConfiguration; |
| import org.apache.fluo.core.client.FluoAdminImpl; |
| import org.apache.fluo.core.util.CuratorUtil; |
| |
| @Parameters(commandNames = "list", |
| commandDescription = "Lists all Fluo applications in Fluo instance") |
| public class FluoList extends ConfigCommand { |
| |
| @Override |
| public void execute() throws FluoCommandException { |
| FluoConfiguration config = getConfig(); |
| |
| try (CuratorFramework curator = CuratorUtil.newFluoCurator(config)) { |
| curator.start(); |
| |
| if (!checkCuratorExists(curator)) { |
| System.out.println("Fluo instance (" + config.getInstanceZookeepers() + ") has not been " |
| + "created yet in Zookeeper. It will be created when the first Fluo application is " |
| + "initialized for this instance."); |
| return; |
| } |
| List<String> children = getCuratorChildren(curator); |
| if (children.isEmpty()) { |
| System.out.println("Fluo instance (" + config.getInstanceZookeepers() + ") does not " |
| + "contain any Fluo applications."); |
| return; |
| } |
| Collections.sort(children); |
| |
| System.out.println("Fluo instance (" + config.getInstanceZookeepers() + ") contains " |
| + children.size() + " application(s)\n"); |
| System.out.println("Application Status # Workers"); |
| System.out.println("----------- ------ ---------"); |
| |
| for (String path : children) { |
| listApp(config, path); |
| } |
| } |
| } |
| |
| private boolean checkCuratorExists(CuratorFramework curator) { |
| try { |
| return curator.checkExists().forPath("/") != null; |
| } catch (RuntimeException e) { |
| throw e; |
| } catch (Exception e) { |
| // throwing RuntimeException so stack trace is printed on command line |
| throw new RuntimeException("Error getting curator children", e); |
| } |
| } |
| |
| private List<String> getCuratorChildren(CuratorFramework curator) { |
| try { |
| return curator.getChildren().forPath("/"); |
| } catch (RuntimeException e) { |
| throw e; |
| } catch (Exception e) { |
| // throwing RuntimeException so stack trace is printed on command line |
| throw new RuntimeException("Error getting curator children", e); |
| } |
| } |
| |
| private void listApp(FluoConfiguration config, String path) { |
| FluoConfiguration appConfig = new FluoConfiguration(config); |
| appConfig.setApplicationName(path); |
| try (FluoAdminImpl admin = new FluoAdminImpl(appConfig)) { |
| String state = "STOPPED"; |
| if (admin.applicationRunning()) { |
| state = "RUNNING"; |
| } |
| int numWorkers = admin.numWorkers(); |
| System.out.format("%-15s %-11s %4d\n", path, state, numWorkers); |
| } |
| } |
| } |