| /* |
| * 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.obr; |
| |
| import org.apache.felix.bundlerepository.Reason; |
| import org.apache.felix.bundlerepository.Resolver; |
| import org.apache.felix.bundlerepository.Resource; |
| import org.apache.karaf.cellar.core.Configurations; |
| 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.cellar.core.event.EventType; |
| import org.osgi.framework.Bundle; |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.InvalidSyntaxException; |
| import org.osgi.framework.Version; |
| import org.osgi.service.cm.Configuration; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Handler for cluster OBR bundle event. |
| */ |
| public class ObrBundleEventHandler extends ObrSupport implements EventHandler<ClusterObrBundleEvent> { |
| |
| private static final transient Logger LOGGER = LoggerFactory.getLogger(ObrBundleEventHandler.class); |
| |
| protected static final char VERSION_DELIM = ','; |
| |
| public static final String SWITCH_ID = "org.apache.karaf.cellar.event.obr.bundles.handler"; |
| |
| private final Switch eventSwitch = new BasicSwitch(SWITCH_ID); |
| |
| @Override |
| public void init(BundleContext bundleContext) { |
| super.init(bundleContext); |
| } |
| |
| @Override |
| public void destroy() { |
| super.destroy(); |
| } |
| |
| protected String[] getTarget(String bundle) { |
| String[] target; |
| int idx = bundle.indexOf(VERSION_DELIM); |
| if (idx > 0) { |
| target = new String[]{ bundle.substring(0, idx), bundle.substring(idx+1) }; |
| } else { |
| target = new String[]{ bundle, null }; |
| } |
| return target; |
| } |
| |
| public Resource selectNewestVersion(Resource[] resources) { |
| int idx = -1; |
| Version v = null; |
| for (int i = 0; (resources != null) && (i < resources.length); i++) { |
| if (i == 0) { |
| idx = 0; |
| v = resources[i].getVersion(); |
| } else { |
| Version vtmp = resources[i].getVersion(); |
| if (vtmp.compareTo(v) > 0) { |
| idx = i; |
| v = vtmp; |
| } |
| } |
| } |
| return (idx < 0) ? null : resources[idx]; |
| } |
| |
| protected Resource[] searchRepository(String targetId, String targetVersion) throws InvalidSyntaxException { |
| try { |
| Bundle bundle = getBundleContext().getBundle(Long.parseLong(targetId)); |
| targetId = bundle.getSymbolicName(); |
| } catch (NumberFormatException e) { |
| // it was not a number, so ignore. |
| } |
| |
| // the target ID may be a bundle name or a bundle symbolic name, |
| // so create |
| StringBuffer sb = new StringBuffer("(|(presentationname="); |
| sb.append(targetId); |
| sb.append(")(symbolicname="); |
| sb.append(targetId); |
| sb.append("))"); |
| if (targetVersion != null) { |
| sb.insert(0, "&("); |
| sb.append("(version="); |
| sb.append(targetVersion); |
| sb.append("))"); |
| } |
| return obrService.discoverResources(sb.toString()); |
| } |
| |
| /** |
| * Handle a received cluster OBR bundle event. |
| * |
| * @param event the received cluster OBR bundle event. |
| */ |
| @Override |
| public void handle(ClusterObrBundleEvent event) { |
| |
| // check if the handler is ON |
| if (this.getSwitch().getStatus().equals(SwitchStatus.OFF)) { |
| LOGGER.debug("CELLAR OBR: {} switch is OFF", SWITCH_ID); |
| return; |
| } |
| |
| if (groupManager == null) { |
| //in rare cases for example right after installation this happens! |
| LOGGER.error("CELLAR OBR: retrieved cluster event {} while groupManager is not available yet!", event); |
| return; |
| } |
| |
| // check if the group is local |
| if (!groupManager.isLocalGroup(event.getSourceGroup().getName())) { |
| LOGGER.debug("CELLAR OBR: node is not part of the event cluster group {}", event.getSourceGroup().getName()); |
| return; |
| } |
| |
| // check if it's not a "local" event |
| if (event.getLocal() != null && event.getLocal().getId().equalsIgnoreCase(clusterManager.getNode().getId())) { |
| LOGGER.trace("CELLAR OBR: cluster event is local (coming from local synchronizer or listener)"); |
| return; |
| } |
| |
| String bundleId = event.getBundleId(); |
| boolean deployOptional = event.getDeployOptional(); |
| boolean start = event.getStart(); |
| try { |
| if (isAllowed(event.getSourceGroup(), Constants.BUNDLES_CONFIG_CATEGORY, bundleId, EventType.INBOUND)) { |
| Resolver resolver = obrService.resolver(); |
| String[] target = getTarget(bundleId); |
| Resource resource = selectNewestVersion(searchRepository(target[0], target[1])); |
| if (resource == null) { |
| LOGGER.warn("CELLAR OBR: bundle {} unknown", target[0]); |
| return; |
| } |
| resolver.add(resource); |
| |
| if ((resolver.getAddedResources() != null) && |
| (resolver.getAddedResources().length > 0)) { |
| if (resolver.resolve(deployOptional ? 0 : Resolver.NO_OPTIONAL_RESOURCES)) { |
| resolver.deploy(start ? Resolver.START : 0); |
| } |
| } else { |
| Reason[] reqs = resolver.getUnsatisfiedRequirements(); |
| if (reqs != null && reqs.length > 0) { |
| LOGGER.warn("CELLAR OBR: unsatisfied requirement(s): "); |
| for (int reqIdx = 0; reqIdx < reqs.length; reqIdx++) { |
| LOGGER.warn(" {}", reqs[reqIdx].getRequirement().getFilter()); |
| LOGGER.warn(" {}", reqs[reqIdx].getResource().getPresentationName()); |
| } |
| } else LOGGER.warn("CELLAR OBR: could not resolve targets"); |
| } |
| } else LOGGER.trace("CELLAR OBR: bundle {} is marked as BLOCKED INBOUND for cluster group {}", bundleId, event.getSourceGroup().getName()); |
| } catch (Exception e) { |
| LOGGER.error("CELLAR OBR: failed to handle bundle event {}", bundleId, e); |
| } |
| } |
| |
| @Override |
| public Class<ClusterObrBundleEvent> getType() { |
| return ClusterObrBundleEvent.class; |
| } |
| |
| @Override |
| public Switch getSwitch() { |
| // load the switch status from the config |
| try { |
| Configuration configuration = configurationAdmin.getConfiguration(Configurations.NODE, null); |
| if (configuration != null) { |
| Boolean status = new Boolean((String) configuration.getProperties().get(Configurations.HANDLER + "." + this.getClass().getName())); |
| if (status) { |
| eventSwitch.turnOn(); |
| } else { |
| eventSwitch.turnOff(); |
| } |
| } |
| } catch (Exception e) { |
| // ignore |
| } |
| return this.eventSwitch; |
| } |
| |
| } |