| /* |
| * Copyright 2016 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.ui.impl.topo.model; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Base class for modeling the Topology View layout. |
| * <p> |
| * Note that an instance of this class will be created for each |
| * {@link org.onosproject.ui.impl.UiWebSocket} connection, and will contain |
| * the state of how the topology is laid out for the logged-in user. |
| */ |
| public class UiTopoLayout { |
| private final Logger log = LoggerFactory.getLogger(getClass()); |
| |
| private final String username; |
| private final UiSharedTopologyModel sharedModel; |
| |
| private boolean registered = false; |
| |
| /** |
| * Creates a new topology layout. |
| */ |
| public UiTopoLayout(String username) { |
| this.username = username; |
| this.sharedModel = UiSharedTopologyModel.instance(); |
| } |
| |
| /** |
| * Initializes the layout; registering with the shared model. |
| */ |
| public void init() { |
| if (!registered) { |
| sharedModel.register(this); |
| registered = true; |
| } else { |
| log.warn("already registered"); |
| } |
| } |
| |
| /** |
| * Destroys the layout; unregistering from the shared model. |
| */ |
| public void destroy() { |
| if (!registered) { |
| sharedModel.unregister(this); |
| } else { |
| log.warn("already unregistered"); |
| } |
| } |
| |
| @Override |
| public String toString() { |
| return String.format("{UiTopoLayout for user <%s>}", username); |
| } |
| } |