| /* |
| * Copyright 2015 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; |
| |
| import com.fasterxml.jackson.databind.node.ObjectNode; |
| import com.google.common.collect.ImmutableSet; |
| import org.onlab.osgi.ServiceDirectory; |
| import org.onosproject.core.CoreService; |
| import org.onosproject.ui.RequestHandler; |
| import org.onosproject.ui.UiConnection; |
| import org.onosproject.ui.UiMessageHandler; |
| import org.onosproject.ui.impl.topo.TopoUiEvent; |
| import org.onosproject.ui.impl.topo.TopoUiListener; |
| import org.onosproject.ui.impl.topo.TopoUiModelService; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.Collection; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| /** |
| * Facility for handling inbound messages from the topology view, and |
| * generating outbound messages for the same. |
| */ |
| public class AltTopoViewMessageHandler extends UiMessageHandler { |
| |
| private static final String TOPO_START = "topoStart"; |
| private static final String TOPO_STOP = "topoStop"; |
| |
| private final Logger log = LoggerFactory.getLogger(getClass()); |
| |
| protected ServiceDirectory directory; |
| protected TopoUiModelService modelService; |
| |
| private TopoUiListener modelListener; |
| private String version; |
| |
| private boolean topoActive = false; |
| |
| @Override |
| public void init(UiConnection connection, ServiceDirectory directory) { |
| super.init(connection, directory); |
| this.directory = checkNotNull(directory, "Directory cannot be null"); |
| modelService = directory.get(TopoUiModelService.class); |
| |
| modelListener = new ModelListener(); |
| version = getVersion(); |
| } |
| |
| |
| private String getVersion() { |
| String ver = directory.get(CoreService.class).version().toString(); |
| return ver.replace(".SNAPSHOT", "*").replaceFirst("~.*$", ""); |
| } |
| |
| |
| @Override |
| protected Collection<RequestHandler> getHandlers() { |
| return ImmutableSet.of( |
| new TopoStart(), |
| new TopoStop() |
| ); |
| } |
| |
| // ===================================================================== |
| // Request Handlers for (topo view) events from the UI... |
| |
| private final class TopoStart extends RequestHandler { |
| private TopoStart() { |
| super(TOPO_START); |
| } |
| |
| @Override |
| public void process(long sid, ObjectNode payload) { |
| topoActive = true; |
| modelService.addListener(modelListener); |
| sendMessages(modelService.getInitialState()); |
| log.debug(TOPO_START); |
| } |
| } |
| |
| private final class TopoStop extends RequestHandler { |
| private TopoStop() { |
| super(TOPO_STOP); |
| } |
| |
| @Override |
| public void process(long sid, ObjectNode payload) { |
| topoActive = false; |
| modelService.removeListener(modelListener); |
| log.debug(TOPO_STOP); |
| } |
| } |
| |
| // ===================================================================== |
| // Private Helper Methods... |
| |
| private void sendMessages(Collection<ObjectNode> messages) { |
| if (topoActive) { |
| UiConnection connection = connection(); |
| if (connection != null) { |
| messages.forEach(connection::sendMessage); |
| } |
| } |
| } |
| |
| // ===================================================================== |
| // Our listener for model events so we can push changes out to the UI... |
| |
| private class ModelListener implements TopoUiListener { |
| @Override |
| public void event(TopoUiEvent event) { |
| log.debug("Handle Event: {}", event); |
| // TODO: handle event |
| } |
| } |
| } |