opendaylight/netconf/netconf-impl/src/main/java/org/opendaylight/controller/netconf/impl/NetconfServerSessionNegotiatorFactory.java

   1 /*
   2  * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8
   9 package org.opendaylight.controller.netconf.impl;
  10
  11 import static org.opendaylight.controller.netconf.mapping.api.NetconfOperationProvider.NetconfOperationProviderUtil.getNetconfSessionIdForReporting;
  12
  13 import com.google.common.base.Preconditions;
  14 import com.google.common.collect.ImmutableSet;
  15
  16 import java.util.Set;
  17
  18 import org.opendaylight.controller.netconf.api.NetconfDocumentedException;
  19 import org.opendaylight.controller.netconf.api.NetconfServerSessionPreferences;
  20 import org.opendaylight.controller.netconf.api.xml.XmlNetconfConstants;
  21 import org.opendaylight.controller.netconf.impl.mapping.CapabilityProvider;
  22 import org.opendaylight.controller.netconf.impl.osgi.SessionMonitoringService;
  23 import org.opendaylight.controller.netconf.mapping.api.NetconfOperationProvider;
  24 import org.opendaylight.controller.netconf.mapping.api.NetconfOperationServiceSnapshot;
  25 import org.opendaylight.controller.netconf.util.messages.NetconfHelloMessage;
  26 import org.opendaylight.protocol.framework.SessionListenerFactory;
  27 import org.opendaylight.protocol.framework.SessionNegotiator;
  28 import org.opendaylight.protocol.framework.SessionNegotiatorFactory;
  29
  30 import com.google.common.collect.Sets;
  31
  32 import io.netty.channel.Channel;
  33 import io.netty.util.Timer;
  34 import io.netty.util.concurrent.Promise;
  35
  36 import org.slf4j.Logger;
  37 import org.slf4j.LoggerFactory;
  38
  39 public class NetconfServerSessionNegotiatorFactory implements SessionNegotiatorFactory<NetconfHelloMessage, NetconfServerSession, NetconfServerSessionListener> {
  40
  41     public static final Set<String> DEFAULT_BASE_CAPABILITIES = ImmutableSet.of(
  42             XmlNetconfConstants.URN_IETF_PARAMS_NETCONF_BASE_1_0,
  43             XmlNetconfConstants.URN_IETF_PARAMS_NETCONF_BASE_1_1,
  44             XmlNetconfConstants.URN_IETF_PARAMS_NETCONF_CAPABILITY_EXI_1_0
  45     );
  46
  47     private final Timer timer;
  48
  49     private final SessionIdProvider idProvider;
  50     private final NetconfOperationProvider netconfOperationProvider;
  51     private final long connectionTimeoutMillis;
  52     private final DefaultCommitNotificationProducer commitNotificationProducer;
  53     private final SessionMonitoringService monitoringService;
  54     private static final Logger logger = LoggerFactory.getLogger(NetconfServerSessionNegotiatorFactory.class);
  55     private final Set<String> baseCapabilities;
  56
  57     // TODO too many params, refactor
  58     public NetconfServerSessionNegotiatorFactory(Timer timer, NetconfOperationProvider netconfOperationProvider,
  59                                                  SessionIdProvider idProvider, long connectionTimeoutMillis,
  60                                                  DefaultCommitNotificationProducer commitNot,
  61                                                  SessionMonitoringService monitoringService) {
  62         this(timer, netconfOperationProvider, idProvider, connectionTimeoutMillis, commitNot, monitoringService, DEFAULT_BASE_CAPABILITIES);
  63     }
  64
  65     // TODO too many params, refactor
  66     public NetconfServerSessionNegotiatorFactory(Timer timer, NetconfOperationProvider netconfOperationProvider,
  67                                                  SessionIdProvider idProvider, long connectionTimeoutMillis,
  68                                                  DefaultCommitNotificationProducer commitNot,
  69                                                  SessionMonitoringService monitoringService, Set<String> baseCapabilities) {
  70         this.timer = timer;
  71         this.netconfOperationProvider = netconfOperationProvider;
  72         this.idProvider = idProvider;
  73         this.connectionTimeoutMillis = connectionTimeoutMillis;
  74         this.commitNotificationProducer = commitNot;
  75         this.monitoringService = monitoringService;
  76         this.baseCapabilities = validateBaseCapabilities(baseCapabilities);
  77     }
  78
  79     private ImmutableSet<String> validateBaseCapabilities(final Set<String> baseCapabilities) {
  80         // Check base capabilities to be supported by the server
  81         Sets.SetView<String> unknownBaseCaps = Sets.difference(baseCapabilities, DEFAULT_BASE_CAPABILITIES);
  82         Preconditions.checkArgument(unknownBaseCaps.isEmpty(),
  83                 "Base capabilities that will be supported by netconf server have to be subset of %s, unknown base capabilities: %s",
  84                 DEFAULT_BASE_CAPABILITIES, unknownBaseCaps);
  85
  86         ImmutableSet.Builder<String> b = ImmutableSet.builder();
  87         b.addAll(baseCapabilities);
  88         // Base 1.0 capability is supported by default
  89         b.add(XmlNetconfConstants.URN_IETF_PARAMS_NETCONF_BASE_1_0);
  90         return b.build();
  91     }
  92
  93     /**
  94      *
  95      * @param defunctSessionListenerFactory will not be taken into account as session listener factory can
  96      *                                      only be created after snapshot is opened, thus this method constructs
  97      *                                      proper session listener factory.
  98      * @param channel Underlying channel
  99      * @param promise Promise to be notified
 100      * @return session negotiator
 101      */
 102     @Override
 103     public SessionNegotiator<NetconfServerSession> getSessionNegotiator(SessionListenerFactory<NetconfServerSessionListener> defunctSessionListenerFactory,
 104                                                                         Channel channel, Promise<NetconfServerSession> promise) {
 105         long sessionId = idProvider.getNextSessionId();
 106         NetconfOperationServiceSnapshot netconfOperationServiceSnapshot = netconfOperationProvider.openSnapshot(
 107                 getNetconfSessionIdForReporting(sessionId));
 108         CapabilityProvider capabilityProvider = new CapabilityProviderImpl(netconfOperationServiceSnapshot);
 109
 110         NetconfServerSessionPreferences proposal = null;
 111         try {
 112             proposal = new NetconfServerSessionPreferences(
 113                     createHelloMessage(sessionId, capabilityProvider), sessionId);
 114         } catch (NetconfDocumentedException e) {
 115             logger.error("Unable to create hello mesage for session {} with capability provider {}", sessionId,capabilityProvider);
 116             throw new IllegalStateException(e);
 117         }
 118
 119         NetconfServerSessionListenerFactory sessionListenerFactory = new NetconfServerSessionListenerFactory(
 120                 commitNotificationProducer, monitoringService,
 121                 netconfOperationServiceSnapshot, capabilityProvider);
 122
 123         return new NetconfServerSessionNegotiator(proposal, promise, channel, timer,
 124                 sessionListenerFactory.getSessionListener(), connectionTimeoutMillis);
 125     }
 126
 127     private NetconfHelloMessage createHelloMessage(long sessionId, CapabilityProvider capabilityProvider) throws NetconfDocumentedException {
 128         return NetconfHelloMessage.createServerHello(Sets.union(capabilityProvider.getCapabilities(), baseCapabilities), sessionId);
 129     }
 130
 131 }