netconf/netconf-topology-singleton/src/main/java/org/opendaylight/netconf/topology/singleton/impl/utils/NetconfTopologyUtils.java

   1 /*
   2  * Copyright (c) 2016 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.netconf.topology.singleton.impl.utils;
  10
  11 import com.google.common.base.Strings;
  12 import java.io.File;
  13 import java.math.BigDecimal;
  14 import java.net.InetSocketAddress;
  15 import java.util.HashMap;
  16 import java.util.Map;
  17 import org.opendaylight.netconf.sal.connect.netconf.NetconfDevice;
  18 import org.opendaylight.netconf.sal.connect.netconf.NetconfStateSchemasResolverImpl;
  19 import org.opendaylight.netconf.sal.connect.util.RemoteDeviceId;
  20 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddress;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.netconf.node.topology.rev150114.NetconfNode;
  22 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NetworkTopology;
  23 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NodeId;
  24 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.TopologyId;
  25 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology;
  26 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.TopologyKey;
  27 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
  28 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.NodeKey;
  29 import org.opendaylight.yangtools.yang.binding.Identifier;
  30 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  31 import org.opendaylight.yangtools.yang.binding.KeyedInstanceIdentifier;
  32 import org.opendaylight.yangtools.yang.model.repo.api.SchemaContextFactory;
  33 import org.opendaylight.yangtools.yang.model.repo.api.SchemaRepository;
  34 import org.opendaylight.yangtools.yang.model.repo.api.SchemaSourceFilter;
  35 import org.opendaylight.yangtools.yang.model.repo.api.YangTextSchemaSource;
  36 import org.opendaylight.yangtools.yang.model.repo.spi.SchemaSourceRegistry;
  37 import org.opendaylight.yangtools.yang.model.repo.util.FilesystemSchemaSourceCache;
  38 import org.opendaylight.yangtools.yang.parser.repo.SharedSchemaRepository;
  39 import org.opendaylight.yangtools.yang.parser.util.TextToASTTransformer;
  40 import org.slf4j.Logger;
  41 import org.slf4j.LoggerFactory;
  42
  43 public class NetconfTopologyUtils {
  44     private static Logger LOG = LoggerFactory.getLogger(NetconfTopologyUtils.class);
  45
  46     private static final String DEFAULT_SCHEMA_REPOSITORY_NAME = "sal-netconf-connector";
  47
  48     public static final long DEFAULT_REQUEST_TIMEOUT_MILLIS = 60000L;
  49     public static final int DEFAULT_KEEPALIVE_DELAY = 0;
  50     public static final boolean DEFAULT_RECONNECT_ON_CHANGED_SCHEMA = false;
  51     public static final int DEFAULT_CONCURRENT_RPC_LIMIT = 0;
  52     public static final int DEFAULT_MAX_CONNECTION_ATTEMPTS = 0;
  53     public static final int DEFAULT_BETWEEN_ATTEMPTS_TIMEOUT_MILLIS = 2000;
  54     public static final long DEFAULT_CONNECTION_TIMEOUT_MILLIS = 20000L;
  55     public static final BigDecimal DEFAULT_SLEEP_FACTOR = new BigDecimal(1.5);
  56
  57
  58     // The default cache directory relative to <code>CACHE_DIRECTORY</code>
  59
  60     public static final String DEFAULT_CACHE_DIRECTORY = "schema";
  61
  62     // Filesystem based caches are stored relative to the cache directory.
  63     public static final String CACHE_DIRECTORY = "cache";
  64
  65     // The qualified schema cache directory <code>cache/schema</code>
  66     public static final String QUALIFIED_DEFAULT_CACHE_DIRECTORY =
  67             CACHE_DIRECTORY + File.separator + DEFAULT_CACHE_DIRECTORY;
  68
  69     // The default schema repository in the case that one is not specified.
  70     public static final SharedSchemaRepository DEFAULT_SCHEMA_REPOSITORY =
  71             new SharedSchemaRepository(DEFAULT_SCHEMA_REPOSITORY_NAME);
  72
  73
  74      // The default <code>FilesystemSchemaSourceCache</code>, which stores cached files in <code>cache/schema</code>.
  75     public static final FilesystemSchemaSourceCache<YangTextSchemaSource> DEFAULT_CACHE =
  76             new FilesystemSchemaSourceCache<>(DEFAULT_SCHEMA_REPOSITORY, YangTextSchemaSource.class,
  77                     new File(QUALIFIED_DEFAULT_CACHE_DIRECTORY));
  78
  79     // The default factory for creating <code>SchemaContext</code> instances.
  80     public static final SchemaContextFactory DEFAULT_SCHEMA_CONTEXT_FACTORY =
  81             DEFAULT_SCHEMA_REPOSITORY.createSchemaContextFactory(SchemaSourceFilter.ALWAYS_ACCEPT);
  82
  83     /**
  84      * Keeps track of initialized Schema resources.  A Map is maintained in which the key represents the name
  85      * of the schema cache directory, and the value is a corresponding <code>SchemaResourcesDTO</code>.  The
  86      * <code>SchemaResourcesDTO</code> is essentially a container that allows for the extraction of the
  87      * <code>SchemaRegistry</code> and <code>SchemaContextFactory</code> which should be used for a particular
  88      * Netconf mount.  Access to <code>schemaResourcesDTOs</code> should be surrounded by appropriate
  89      * synchronization locks.
  90      */
  91     private static final Map<String, NetconfDevice.SchemaResourcesDTO> schemaResourcesDTOs = new HashMap<>();
  92
  93     // Initializes default constant instances for the case when the default schema repository
  94     // directory cache/schema is used.
  95     static {
  96         schemaResourcesDTOs.put(DEFAULT_CACHE_DIRECTORY,
  97                 new NetconfDevice.SchemaResourcesDTO(DEFAULT_SCHEMA_REPOSITORY, DEFAULT_SCHEMA_REPOSITORY,
  98                         DEFAULT_SCHEMA_CONTEXT_FACTORY, new NetconfStateSchemasResolverImpl()));
  99         DEFAULT_SCHEMA_REPOSITORY.registerSchemaSourceListener(DEFAULT_CACHE);
 100         DEFAULT_SCHEMA_REPOSITORY.registerSchemaSourceListener(
 101                 TextToASTTransformer.create(DEFAULT_SCHEMA_REPOSITORY, DEFAULT_SCHEMA_REPOSITORY));
 102     }
 103
 104     public static NetconfDevice.SchemaResourcesDTO setupSchemaCacheDTO(final Node node) {
 105         final NetconfNode netconfNode = node.getAugmentation(NetconfNode.class);
 106         final String moduleSchemaCacheDirectory = netconfNode.getSchemaCacheDirectory();
 107         final RemoteDeviceId deviceId = createRemoteDeviceId(node.getNodeId(), netconfNode);
 108
 109         // Setup information related to the SchemaRegistry, SchemaResourceFactory, etc.
 110         NetconfDevice.SchemaResourcesDTO schemaResourcesDTO = null;
 111         // Only checks to ensure the String is not empty or null;  further checks related to directory accessibility
 112         // and file permissions are handled during the FilesystemSchemaSourceCache initialization.
 113         if (!Strings.isNullOrEmpty(moduleSchemaCacheDirectory)) {
 114             // If a custom schema cache directory is specified, create the backing DTO; otherwise, the SchemaRegistry
 115             // and SchemaContextFactory remain the default values.
 116             if (!moduleSchemaCacheDirectory.equals(DEFAULT_CACHE_DIRECTORY)) {
 117                 // Multiple modules may be created at once;  synchronize to avoid issues with data consistency among
 118                 // threads.
 119                 synchronized (schemaResourcesDTOs) {
 120                     // Look for the cached DTO to reuse SchemaRegistry and SchemaContextFactory variables if
 121                     // they already exist
 122                     schemaResourcesDTO = schemaResourcesDTOs.get(moduleSchemaCacheDirectory);
 123                     if (schemaResourcesDTO == null) {
 124                         schemaResourcesDTO = createSchemaResourcesDTO(moduleSchemaCacheDirectory);
 125                         schemaResourcesDTO.getSchemaRegistry().registerSchemaSourceListener(
 126                                 TextToASTTransformer.create((SchemaRepository) schemaResourcesDTO.getSchemaRegistry(),
 127                                         schemaResourcesDTO.getSchemaRegistry())
 128                         );
 129                         schemaResourcesDTOs.put(moduleSchemaCacheDirectory, schemaResourcesDTO);
 130                     }
 131                 }
 132                 LOG.info("{} : netconf connector will use schema cache directory {} instead of {}",
 133                         deviceId, moduleSchemaCacheDirectory, DEFAULT_CACHE_DIRECTORY);
 134             }
 135         }
 136
 137         if (schemaResourcesDTO == null) {
 138             synchronized (schemaResourcesDTOs) {
 139                 schemaResourcesDTO = schemaResourcesDTOs.get(DEFAULT_CACHE_DIRECTORY);
 140             }
 141             LOG.info("{} : using the default directory {}",
 142                     deviceId, QUALIFIED_DEFAULT_CACHE_DIRECTORY);
 143         }
 144
 145         return schemaResourcesDTO;
 146     }
 147
 148     /**
 149      * Creates the backing Schema classes for a particular directory.
 150      *
 151      * @param moduleSchemaCacheDirectory The string directory relative to "cache"
 152      * @return A DTO containing the Schema classes for the Netconf mount.
 153      */
 154     private static NetconfDevice.SchemaResourcesDTO createSchemaResourcesDTO(final String moduleSchemaCacheDirectory) {
 155         final SharedSchemaRepository repository = new SharedSchemaRepository(moduleSchemaCacheDirectory);
 156         final SchemaContextFactory schemaContextFactory
 157                 = repository.createSchemaContextFactory(SchemaSourceFilter.ALWAYS_ACCEPT);
 158
 159         final FilesystemSchemaSourceCache<YangTextSchemaSource> deviceCache =
 160                 createDeviceFilesystemCache(moduleSchemaCacheDirectory, repository);
 161         repository.registerSchemaSourceListener(deviceCache);
 162         return new NetconfDevice.SchemaResourcesDTO(repository, repository, schemaContextFactory,
 163                 new NetconfStateSchemasResolverImpl());
 164     }
 165
 166     /**
 167      * Creates a <code>FilesystemSchemaSourceCache</code> for the custom schema cache directory.
 168      *
 169      * @param schemaCacheDirectory The custom cache directory relative to "cache"
 170      * @return A <code>FilesystemSchemaSourceCache</code> for the custom schema cache directory
 171      */
 172     private static FilesystemSchemaSourceCache<YangTextSchemaSource> createDeviceFilesystemCache(
 173             final String schemaCacheDirectory, final SchemaSourceRegistry schemaRegistry) {
 174         final String relativeSchemaCacheDirectory =
 175                 NetconfTopologyUtils.CACHE_DIRECTORY + File.separator + schemaCacheDirectory;
 176         return new FilesystemSchemaSourceCache<>(schemaRegistry, YangTextSchemaSource.class,
 177                 new File(relativeSchemaCacheDirectory));
 178     }
 179
 180
 181     public static RemoteDeviceId createRemoteDeviceId(final NodeId nodeId, final NetconfNode node) {
 182         final IpAddress ipAddress = node.getHost().getIpAddress();
 183         final InetSocketAddress address = new InetSocketAddress(ipAddress.getIpv4Address() != null
 184                 ? ipAddress.getIpv4Address().getValue() : ipAddress.getIpv6Address().getValue(),
 185                 node.getPort().getValue());
 186         return new RemoteDeviceId(nodeId.getValue(), address);
 187     }
 188
 189     public static String createActorPath(final String masterMember, final String name) {
 190         return  masterMember + "/user/" + name;
 191     }
 192
 193     public static String createMasterActorName(final String name, final String masterAddress) {
 194         return masterAddress.replaceAll("//", "") + "_" + name;
 195     }
 196
 197     public static NodeId getNodeId(final InstanceIdentifier.PathArgument pathArgument) {
 198         if (pathArgument instanceof InstanceIdentifier.IdentifiableItem<?, ?>) {
 199
 200             final Identifier key = ((InstanceIdentifier.IdentifiableItem) pathArgument).getKey();
 201             if (key instanceof NodeKey) {
 202                 return ((NodeKey) key).getNodeId();
 203             }
 204         }
 205         throw new IllegalStateException("Unable to create NodeId from: " + pathArgument);
 206     }
 207
 208     public static KeyedInstanceIdentifier<Topology, TopologyKey> createTopologyListPath(final String topologyId) {
 209         final InstanceIdentifier<NetworkTopology> networkTopology = InstanceIdentifier.create(NetworkTopology.class);
 210         return networkTopology.child(Topology.class, new TopologyKey(new TopologyId(topologyId)));
 211     }
 212
 213     public static InstanceIdentifier<Node> createTopologyNodeListPath(final NodeKey key, final String topologyId) {
 214         return createTopologyListPath(topologyId)
 215                 .child(Node.class, new NodeKey(new NodeId(key.getNodeId().getValue())));
 216     }
 217
 218     public static InstanceIdentifier<Node> createTopologyNodePath(final String topologyId) {
 219         return createTopologyListPath(topologyId).child(Node.class);
 220     }
 221 }