| /* |
| * 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.apache.karaf.cellar.features; |
| |
| import org.apache.karaf.cellar.core.control.BasicSwitch; |
| import org.apache.karaf.cellar.core.control.Switch; |
| import org.apache.karaf.cellar.core.control.SwitchStatus; |
| import org.apache.karaf.cellar.core.event.EventHandler; |
| import org.apache.karaf.features.RepositoryEvent; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.net.URI; |
| |
| /** |
| * Handler for cluster features repository event. |
| */ |
| public class RepositoryEventHandler extends FeaturesSupport implements EventHandler<ClusterRepositoryEvent> { |
| |
| private static final transient Logger LOGGER = LoggerFactory.getLogger(RepositoryEventHandler.class); |
| |
| public static final String SWITCH_ID = "org.apache.karaf.cellar.event.repository.handler"; |
| |
| private final Switch eventSwitch = new BasicSwitch(SWITCH_ID); |
| |
| @Override |
| public void init() { |
| super.init(); |
| } |
| |
| @Override |
| public void destroy() { |
| super.destroy(); |
| } |
| |
| /** |
| * Handle cluster features repository event. |
| * |
| * @param event the cluster event to handle. |
| */ |
| @Override |
| public void handle(ClusterRepositoryEvent event) { |
| |
| // check if the handler is ON |
| if (eventSwitch.getStatus().equals(SwitchStatus.OFF)) { |
| LOGGER.debug("CELLAR FEATURE: {} switch is OFF, cluster event is not handled", SWITCH_ID); |
| return; |
| } |
| |
| if (groupManager == null) { |
| //in rare cases for example right after installation this happens! |
| LOGGER.error("CELLAR FEATURE: retrieved event {} while groupManager is not available yet!", event); |
| return; |
| } |
| |
| // check if the group is local |
| if (!groupManager.isLocalGroup(event.getSourceGroup().getName())) { |
| LOGGER.debug("CELLAR FEATURE: node is not part of the event cluster group"); |
| return; |
| } |
| |
| String uri = event.getId(); |
| RepositoryEvent.EventType type = event.getType(); |
| try { |
| // TODO check if isAllowed |
| if (RepositoryEvent.EventType.RepositoryAdded.equals(type)) { |
| if (!isRepositoryRegisteredLocally(uri)) { |
| LOGGER.debug("CELLAR FEATURE: adding repository URI {}", uri); |
| featuresService.addRepository(new URI(uri), event.getInstall()); |
| } else { |
| LOGGER.debug("CELLAR FEATURE: repository URI {} is already registered locally"); |
| } |
| } else { |
| if (isRepositoryRegisteredLocally(uri)) { |
| LOGGER.debug("CELLAR FEATURE: removing repository URI {}", uri); |
| featuresService.removeRepository(new URI(uri), event.getUninstall()); |
| } else { |
| LOGGER.debug("CELLAR FEATURE: repository URI {} is not registered locally"); |
| } |
| } |
| } catch (Exception e) { |
| LOGGER.error("CELLAR FEATURE: failed to add/remove repository URL {}", uri, e); |
| } |
| } |
| |
| @Override |
| public Class<ClusterRepositoryEvent> getType() { |
| return ClusterRepositoryEvent.class; |
| } |
| |
| @Override |
| public Switch getSwitch() { |
| return eventSwitch; |
| } |
| |
| } |