Java tutorial
/* * Copyright (c) 2013 Cisco Systems, Inc. and others. All rights reserved. * * This program and the accompanying materials are made available under the * terms of the Eclipse Public License v1.0 which accompanies this distribution, * and is available at http://www.eclipse.org/legal/epl-v10.html */ package org.opendaylight.controller.netconf.impl.osgi; import com.google.common.base.Function; import com.google.common.base.Optional; import com.google.common.base.Preconditions; import com.google.common.collect.Collections2; import com.google.common.collect.ImmutableList; import com.google.common.collect.ImmutableList.Builder; import com.google.common.collect.Lists; import com.google.common.collect.Maps; import com.google.common.collect.Sets; import io.netty.util.internal.ConcurrentSet; import java.util.ArrayList; import java.util.Collection; import java.util.List; import java.util.Map; import java.util.Set; import java.util.concurrent.ConcurrentHashMap; import javax.annotation.Nonnull; import org.opendaylight.controller.netconf.api.Capability; import org.opendaylight.controller.netconf.api.monitoring.NetconfManagementSession; import org.opendaylight.controller.netconf.api.monitoring.NetconfMonitoringService; import org.opendaylight.controller.netconf.mapping.api.NetconfOperationServiceFactory; import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Uri; import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.monitoring.rev101004.NetconfState; import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.monitoring.rev101004.NetconfStateBuilder; import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.monitoring.rev101004.Yang; import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.monitoring.rev101004.netconf.state.Capabilities; import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.monitoring.rev101004.netconf.state.CapabilitiesBuilder; import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.monitoring.rev101004.netconf.state.Schemas; import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.monitoring.rev101004.netconf.state.SchemasBuilder; import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.monitoring.rev101004.netconf.state.Sessions; import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.monitoring.rev101004.netconf.state.SessionsBuilder; import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.monitoring.rev101004.netconf.state.schemas.Schema; import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.monitoring.rev101004.netconf.state.schemas.SchemaBuilder; import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.monitoring.rev101004.netconf.state.schemas.SchemaKey; import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.monitoring.rev101004.netconf.state.sessions.Session; import org.slf4j.Logger; import org.slf4j.LoggerFactory; public class NetconfMonitoringServiceImpl implements NetconfMonitoringService, AutoCloseable { private static final Schema.Location NETCONF_LOCATION = new Schema.Location( Schema.Location.Enumeration.NETCONF); private static final List<Schema.Location> NETCONF_LOCATIONS = ImmutableList.of(NETCONF_LOCATION); private static final Logger LOG = LoggerFactory.getLogger(NetconfMonitoringServiceImpl.class); private static final Function<NetconfManagementSession, Session> SESSION_FUNCTION = new Function<NetconfManagementSession, Session>() { @Override public Session apply(@Nonnull final NetconfManagementSession input) { return input.toManagementSession(); } }; private static final Function<Capability, Uri> CAPABILITY_TO_URI = new Function<Capability, Uri>() { @Override public Uri apply(final Capability input) { return new Uri(input.getCapabilityUri()); } }; private final Set<NetconfManagementSession> sessions = new ConcurrentSet<>(); private final NetconfOperationServiceFactory netconfOperationProvider; private final Map<Uri, Capability> capabilities = new ConcurrentHashMap<>(); private final Set<MonitoringListener> listeners = Sets.newHashSet(); public NetconfMonitoringServiceImpl(final NetconfOperationServiceFactory netconfOperationProvider) { this.netconfOperationProvider = netconfOperationProvider; netconfOperationProvider.registerCapabilityListener(this); } @Override public synchronized void onSessionUp(final NetconfManagementSession session) { LOG.debug("Session {} up", session); Preconditions.checkState(!sessions.contains(session), "Session %s was already added", session); sessions.add(session); notifyListeners(); } @Override public synchronized void onSessionDown(final NetconfManagementSession session) { LOG.debug("Session {} down", session); Preconditions.checkState(sessions.contains(session), "Session %s not present", session); sessions.remove(session); notifyListeners(); } @Override public synchronized Sessions getSessions() { return new SessionsBuilder() .setSession(ImmutableList.copyOf(Collections2.transform(sessions, SESSION_FUNCTION))).build(); } @Override public synchronized Schemas getSchemas() { try { return transformSchemas(netconfOperationProvider.getCapabilities()); } catch (final RuntimeException e) { throw e; } catch (final Exception e) { throw new IllegalStateException("Exception while closing", e); } } @Override public synchronized String getSchemaForCapability(final String moduleName, final Optional<String> revision) { // FIXME not effective at all Map<String, Map<String, String>> mappedModulesToRevisionToSchema = Maps.newHashMap(); final Collection<Capability> caps = capabilities.values(); for (Capability cap : caps) { if (!cap.getModuleName().isPresent() || !cap.getRevision().isPresent() || !cap.getCapabilitySchema().isPresent()) { continue; } final String currentModuleName = cap.getModuleName().get(); Map<String, String> revisionMap = mappedModulesToRevisionToSchema.get(currentModuleName); if (revisionMap == null) { revisionMap = Maps.newHashMap(); mappedModulesToRevisionToSchema.put(currentModuleName, revisionMap); } String currentRevision = cap.getRevision().get(); revisionMap.put(currentRevision, cap.getCapabilitySchema().get()); } Map<String, String> revisionMapRequest = mappedModulesToRevisionToSchema.get(moduleName); Preconditions.checkState(revisionMapRequest != null, "Capability for module %s not present, " + "" + "available modules : %s", moduleName, Collections2.transform(caps, CAPABILITY_TO_URI)); if (revision.isPresent()) { String schema = revisionMapRequest.get(revision.get()); Preconditions.checkState(schema != null, "Capability for module %s:%s not present, available revisions for module: %s", moduleName, revision.get(), revisionMapRequest.keySet()); return schema; } else { Preconditions.checkState(revisionMapRequest.size() == 1, "Expected 1 capability for module %s, available revisions : %s", moduleName, revisionMapRequest.keySet()); return revisionMapRequest.values().iterator().next(); } } @Override public synchronized Capabilities getCapabilities() { return new CapabilitiesBuilder().setCapability(Lists.newArrayList(capabilities.keySet())).build(); } @Override public synchronized AutoCloseable registerListener(final MonitoringListener listener) { listeners.add(listener); listener.onStateChanged(getCurrentNetconfState()); return new AutoCloseable() { @Override public void close() throws Exception { listeners.remove(listener); } }; } private NetconfState getCurrentNetconfState() { return new NetconfStateBuilder().setCapabilities(getCapabilities()).setSchemas(getSchemas()) .setSessions(getSessions()).build(); } private static Schemas transformSchemas(final Set<Capability> caps) { final List<Schema> schemas = new ArrayList<>(caps.size()); for (final Capability cap : caps) { if (cap.getCapabilitySchema().isPresent()) { final SchemaBuilder builder = new SchemaBuilder(); Preconditions.checkState(cap.getModuleNamespace().isPresent()); builder.setNamespace(new Uri(cap.getModuleNamespace().get())); Preconditions.checkState(cap.getRevision().isPresent()); final String version = cap.getRevision().get(); builder.setVersion(version); Preconditions.checkState(cap.getModuleName().isPresent()); final String identifier = cap.getModuleName().get(); builder.setIdentifier(identifier); builder.setFormat(Yang.class); builder.setLocation(transformLocations(cap.getLocation())); builder.setKey(new SchemaKey(Yang.class, identifier, version)); schemas.add(builder.build()); } } return new SchemasBuilder().setSchema(schemas).build(); } private static List<Schema.Location> transformLocations(final Collection<String> locations) { if (locations.isEmpty()) { return NETCONF_LOCATIONS; } final Builder<Schema.Location> b = ImmutableList.builder(); b.add(NETCONF_LOCATION); for (final String location : locations) { b.add(new Schema.Location(new Uri(location))); } return b.build(); } @Override public synchronized void onCapabilitiesAdded(final Set<Capability> addedCaps) { // FIXME howto check for duplicates this.capabilities.putAll(Maps.uniqueIndex(addedCaps, CAPABILITY_TO_URI)); notifyListeners(); } private void notifyListeners() { for (final MonitoringListener listener : listeners) { listener.onStateChanged(getCurrentNetconfState()); } } @Override public synchronized void onCapabilitiesRemoved(final Set<Capability> addedCaps) { for (final Capability addedCap : addedCaps) { capabilities.remove(addedCap.getCapabilityUri()); } notifyListeners(); } @Override public synchronized void close() throws Exception { listeners.clear(); sessions.clear(); capabilities.clear(); } }