| /** |
| * 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.ambari.server.stageplanner; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.TreeMap; |
| |
| import org.apache.ambari.server.Role; |
| import org.apache.ambari.server.RoleCommand; |
| |
| public class RoleGraphNode { |
| public RoleGraphNode(Role role, RoleCommand command) { |
| this.role = role; |
| this.command = command; |
| } |
| private Role role; |
| private RoleCommand command; |
| private int inDegree = 0; |
| private List<String> hosts = new ArrayList<String>(); |
| private Map<String, RoleGraphNode> edges = new TreeMap<String, RoleGraphNode>(); |
| public synchronized void addHost(String host) { |
| hosts.add(host); |
| } |
| public synchronized void addEdge(RoleGraphNode rgn) { |
| if (edges.containsKey(rgn.getRole().toString())) { |
| return; |
| } |
| edges.put(rgn.getRole().toString(), rgn); |
| rgn.incrementInDegree(); |
| } |
| private synchronized void incrementInDegree() { |
| inDegree ++; |
| } |
| public Role getRole() { |
| return role; |
| } |
| public RoleCommand getCommand() { |
| return command; |
| } |
| public List<String> getHosts() { |
| return hosts; |
| } |
| public int getInDegree() { |
| return inDegree; |
| } |
| |
| Collection<RoleGraphNode> getEdges() { |
| return edges.values(); |
| } |
| public synchronized void decrementInDegree() { |
| inDegree --; |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder builder = new StringBuilder(); |
| builder.append("("+role+", "+command +", "+inDegree+")"); |
| return builder.toString(); |
| } |
| } |