| /* |
| * Copyright 2015-present Open Networking Foundation |
| * |
| * 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.component.impl; |
| |
| import org.apache.felix.scr.ScrService; |
| import org.apache.felix.scr.annotations.Activate; |
| import org.apache.felix.scr.annotations.Component; |
| import org.apache.felix.scr.annotations.Deactivate; |
| import org.apache.felix.scr.annotations.Reference; |
| import org.apache.felix.scr.annotations.ReferenceCardinality; |
| import org.apache.felix.scr.annotations.Service; |
| import org.onosproject.core.ApplicationId; |
| import org.onosproject.component.ComponentService; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.Collections; |
| import java.util.Set; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.ScheduledExecutorService; |
| import java.util.concurrent.TimeUnit; |
| |
| import static org.onlab.util.Tools.groupedThreads; |
| |
| /** |
| * Manages OSGi components. |
| */ |
| @Service |
| @Component(immediate = true) |
| public class ComponentManager implements ComponentService { |
| |
| private final Logger log = LoggerFactory.getLogger(getClass()); |
| |
| private static final int POLLING_PERIOD_MS = 500; |
| |
| private static final int NUM_THREADS = 1; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected ScrService scrService; |
| |
| private Set<String> components; |
| |
| private ScheduledExecutorService executor; |
| |
| @Activate |
| private void activate() { |
| components = Collections.newSetFromMap(new ConcurrentHashMap<>()); |
| |
| executor = Executors.newScheduledThreadPool(NUM_THREADS, |
| groupedThreads("onos/component", "%d", log)); |
| |
| executor.scheduleAtFixedRate(() -> components.forEach(this::enableComponent), |
| 0, POLLING_PERIOD_MS, TimeUnit.MILLISECONDS); |
| |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| private void deactivate() { |
| executor.shutdownNow(); |
| |
| log.info("Stopped"); |
| } |
| |
| @Override |
| public void activate(ApplicationId appId, String name) { |
| components.add(name); |
| enableComponent(name); |
| } |
| |
| @Override |
| public void deactivate(ApplicationId appId, String name) { |
| components.remove(name); |
| disableComponent(name); |
| } |
| |
| private void enableComponent(String name) { |
| org.apache.felix.scr.Component[] components = scrService.getComponents(name); |
| |
| if (components == null || components.length == 0) { |
| return; |
| } |
| |
| org.apache.felix.scr.Component component = components[0]; |
| |
| if (component.getState() == org.apache.felix.scr.Component.STATE_DISABLED) { |
| log.info("Enabling component {}", name); |
| component.enable(); |
| } |
| } |
| |
| private void disableComponent(String name) { |
| org.apache.felix.scr.Component[] components = scrService.getComponents(name); |
| |
| if (components == null || components.length == 0) { |
| return; |
| } |
| |
| log.info("Disabling component {}", name); |
| |
| components[0].disable(); |
| } |
| } |