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 com.google.common.util.concurrent.Uninterruptibles;
  13 import java.io.File;
  14 import java.math.BigDecimal;
  15 import java.net.InetSocketAddress;
  16 import java.util.HashMap;
  17 import java.util.Map;
  18 import java.util.concurrent.TimeUnit;
  19 import org.opendaylight.netconf.api.DocumentedException;
  20 import org.opendaylight.netconf.sal.connect.netconf.NetconfDevice;
  21 import org.opendaylight.netconf.sal.connect.netconf.NetconfStateSchemasResolverImpl;
  22 import org.opendaylight.netconf.sal.connect.util.RemoteDeviceId;
  23 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddress;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.netconf.node.topology.rev150114.NetconfNode;
  25 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NetworkTopology;
  26 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NodeId;
  27 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.TopologyId;
  28 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology;
  29 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.TopologyKey;
  30 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
  31 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.NodeKey;
  32 import org.opendaylight.yangtools.yang.binding.Identifier;
  33 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  34 import org.opendaylight.yangtools.yang.binding.KeyedInstanceIdentifier;
  35 import org.opendaylight.yangtools.yang.model.repo.api.SchemaContextFactory;
  36 import org.opendaylight.yangtools.yang.model.repo.api.SchemaRepository;
  37 import org.opendaylight.yangtools.yang.model.repo.api.SchemaSourceFilter;
  38 import org.opendaylight.yangtools.yang.model.repo.api.YangTextSchemaSource;
  39 import org.opendaylight.yangtools.yang.model.repo.spi.SchemaSourceRegistry;
  40 import org.opendaylight.yangtools.yang.model.repo.util.FilesystemSchemaSourceCache;
  41 import org.opendaylight.yangtools.yang.model.repo.util.InMemorySchemaSourceCache;
  42 import org.opendaylight.yangtools.yang.parser.repo.SharedSchemaRepository;
  43 import org.opendaylight.yangtools.yang.parser.rfc7950.repo.ASTSchemaSource;
  44 import org.opendaylight.yangtools.yang.parser.rfc7950.repo.TextToASTTransformer;
  45 import org.slf4j.Logger;
  46 import org.slf4j.LoggerFactory;
  47
  48 public final class NetconfTopologyUtils {
  49     private static Logger LOG = LoggerFactory.getLogger(NetconfTopologyUtils.class);
  50
  51     private static final String DEFAULT_SCHEMA_REPOSITORY_NAME = "sal-netconf-connector";
  52
  53     public static final long DEFAULT_REQUEST_TIMEOUT_MILLIS = 60000L;
  54     public static final int DEFAULT_KEEPALIVE_DELAY = 0;
  55     public static final boolean DEFAULT_RECONNECT_ON_CHANGED_SCHEMA = false;
  56     public static final int DEFAULT_CONCURRENT_RPC_LIMIT = 0;
  57     public static final int DEFAULT_MAX_CONNECTION_ATTEMPTS = 0;
  58     public static final int DEFAULT_BETWEEN_ATTEMPTS_TIMEOUT_MILLIS = 2000;
  59     public static final long DEFAULT_CONNECTION_TIMEOUT_MILLIS = 20000L;
  60     public static final BigDecimal DEFAULT_SLEEP_FACTOR = new BigDecimal(1.5);
  61
  62
  63     // The default cache directory relative to <code>CACHE_DIRECTORY</code>
  64
  65     public static final String DEFAULT_CACHE_DIRECTORY = "schema";
  66
  67     // Filesystem based caches are stored relative to the cache directory.
  68     public static final String CACHE_DIRECTORY = "cache";
  69
  70     // The qualified schema cache directory <code>cache/schema</code>
  71     public static final String QUALIFIED_DEFAULT_CACHE_DIRECTORY =
  72             CACHE_DIRECTORY + File.separator + DEFAULT_CACHE_DIRECTORY;
  73
  74     // The default schema repository in the case that one is not specified.
  75     public static final SharedSchemaRepository DEFAULT_SCHEMA_REPOSITORY =
  76             new SharedSchemaRepository(DEFAULT_SCHEMA_REPOSITORY_NAME);
  77
  78     public static final InMemorySchemaSourceCache<ASTSchemaSource> DEFAULT_AST_CACHE =
  79             InMemorySchemaSourceCache.createSoftCache(DEFAULT_SCHEMA_REPOSITORY, ASTSchemaSource.class);
  80
  81     // The default factory for creating <code>SchemaContext</code> instances.
  82     public static final SchemaContextFactory DEFAULT_SCHEMA_CONTEXT_FACTORY =
  83             DEFAULT_SCHEMA_REPOSITORY.createSchemaContextFactory(SchemaSourceFilter.ALWAYS_ACCEPT);
  84
  85     /**
  86      * Keeps track of initialized Schema resources.  A Map is maintained in which the key represents the name
  87      * of the schema cache directory, and the value is a corresponding <code>SchemaResourcesDTO</code>.  The
  88      * <code>SchemaResourcesDTO</code> is essentially a container that allows for the extraction of the
  89      * <code>SchemaRegistry</code> and <code>SchemaContextFactory</code> which should be used for a particular
  90      * Netconf mount.  Access to <code>SCHEMA_RESOURCES_DTO_MAP</code> should be surrounded by appropriate
  91      * synchronization locks.
  92      */
  93     private static final Map<String, NetconfDevice.SchemaResourcesDTO> SCHEMA_RESOURCES_DTO_MAP = new HashMap<>();
  94
  95     // Initializes default constant instances for the case when the default schema repository
  96     // directory cache/schema is used.
  97     static {
  98         SCHEMA_RESOURCES_DTO_MAP.put(DEFAULT_CACHE_DIRECTORY,
  99                 new NetconfDevice.SchemaResourcesDTO(DEFAULT_SCHEMA_REPOSITORY, DEFAULT_SCHEMA_REPOSITORY,
 100                         DEFAULT_SCHEMA_CONTEXT_FACTORY, new NetconfStateSchemasResolverImpl()));
 101         DEFAULT_SCHEMA_REPOSITORY.registerSchemaSourceListener(DEFAULT_AST_CACHE);
 102         DEFAULT_SCHEMA_REPOSITORY.registerSchemaSourceListener(
 103                 TextToASTTransformer.create(DEFAULT_SCHEMA_REPOSITORY, DEFAULT_SCHEMA_REPOSITORY));
 104
 105         /*
 106          * Create the default <code>FilesystemSchemaSourceCache</code>, which stores cached files
 107          * in <code>cache/schema</code>. Try up to 3 times - we've seen intermittent failures on jenkins where
 108          * FilesystemSchemaSourceCache throws an IAE due to mkdirs failure. The theory is that there's a race
 109          * creating the dir and it already exists when mkdirs is called (mkdirs returns false in this case). In this
 110          * scenario, a retry should succeed.
 111          */
 112         int tries = 1;
 113         while (true) {
 114             try {
 115                 FilesystemSchemaSourceCache<YangTextSchemaSource> defaultCache =
 116                         new FilesystemSchemaSourceCache<>(DEFAULT_SCHEMA_REPOSITORY, YangTextSchemaSource.class,
 117                                 new File(QUALIFIED_DEFAULT_CACHE_DIRECTORY));
 118                 DEFAULT_SCHEMA_REPOSITORY.registerSchemaSourceListener(defaultCache);
 119                 break;
 120             } catch (IllegalArgumentException e) {
 121                 if (tries++ >= 3) {
 122                     LOG.error("Error creating default schema cache", e);
 123                     break;
 124                 }
 125                 Uninterruptibles.sleepUninterruptibly(100, TimeUnit.MILLISECONDS);
 126             }
 127         }
 128     }
 129
 130     private NetconfTopologyUtils() {
 131
 132     }
 133
 134     public static NetconfDevice.SchemaResourcesDTO setupSchemaCacheDTO(final Node node) {
 135         final NetconfNode netconfNode = node.augmentation(NetconfNode.class);
 136         final String moduleSchemaCacheDirectory = netconfNode.getSchemaCacheDirectory();
 137         final RemoteDeviceId deviceId = createRemoteDeviceId(node.getNodeId(), netconfNode);
 138
 139         // Setup information related to the SchemaRegistry, SchemaResourceFactory, etc.
 140         NetconfDevice.SchemaResourcesDTO schemaResourcesDTO = null;
 141         // Only checks to ensure the String is not empty or null;  further checks related to directory accessibility
 142         // and file permissions are handled during the FilesystemSchemaSourceCache initialization.
 143         if (!Strings.isNullOrEmpty(moduleSchemaCacheDirectory)) {
 144             // If a custom schema cache directory is specified, create the backing DTO; otherwise, the SchemaRegistry
 145             // and SchemaContextFactory remain the default values.
 146             if (!moduleSchemaCacheDirectory.equals(DEFAULT_CACHE_DIRECTORY)) {
 147                 // Multiple modules may be created at once;  synchronize to avoid issues with data consistency among
 148                 // threads.
 149                 synchronized (SCHEMA_RESOURCES_DTO_MAP) {
 150                     // Look for the cached DTO to reuse SchemaRegistry and SchemaContextFactory variables if
 151                     // they already exist
 152                     schemaResourcesDTO = SCHEMA_RESOURCES_DTO_MAP.get(moduleSchemaCacheDirectory);
 153                     if (schemaResourcesDTO == null) {
 154                         schemaResourcesDTO = createSchemaResourcesDTO(moduleSchemaCacheDirectory);
 155                         schemaResourcesDTO.getSchemaRegistry().registerSchemaSourceListener(
 156                                 TextToASTTransformer.create((SchemaRepository) schemaResourcesDTO.getSchemaRegistry(),
 157                                         schemaResourcesDTO.getSchemaRegistry())
 158                         );
 159                         SCHEMA_RESOURCES_DTO_MAP.put(moduleSchemaCacheDirectory, schemaResourcesDTO);
 160                     }
 161                 }
 162                 LOG.info("{} : netconf connector will use schema cache directory {} instead of {}",
 163                         deviceId, moduleSchemaCacheDirectory, DEFAULT_CACHE_DIRECTORY);
 164             }
 165         }
 166
 167         if (schemaResourcesDTO == null) {
 168             synchronized (SCHEMA_RESOURCES_DTO_MAP) {
 169                 schemaResourcesDTO = SCHEMA_RESOURCES_DTO_MAP.get(DEFAULT_CACHE_DIRECTORY);
 170             }
 171             LOG.info("{} : using the default directory {}",
 172                     deviceId, QUALIFIED_DEFAULT_CACHE_DIRECTORY);
 173         }
 174
 175         return schemaResourcesDTO;
 176     }
 177
 178     /**
 179      * Creates the backing Schema classes for a particular directory.
 180      *
 181      * @param moduleSchemaCacheDirectory The string directory relative to "cache"
 182      * @return A DTO containing the Schema classes for the Netconf mount.
 183      */
 184     private static NetconfDevice.SchemaResourcesDTO createSchemaResourcesDTO(final String moduleSchemaCacheDirectory) {
 185         final SharedSchemaRepository repository = new SharedSchemaRepository(moduleSchemaCacheDirectory);
 186         final SchemaContextFactory schemaContextFactory
 187                 = repository.createSchemaContextFactory(SchemaSourceFilter.ALWAYS_ACCEPT);
 188
 189         final FilesystemSchemaSourceCache<YangTextSchemaSource> deviceCache =
 190                 createDeviceFilesystemCache(moduleSchemaCacheDirectory, repository);
 191         repository.registerSchemaSourceListener(deviceCache);
 192         repository.registerSchemaSourceListener(InMemorySchemaSourceCache.createSoftCache(repository,
 193                 ASTSchemaSource.class));
 194         return new NetconfDevice.SchemaResourcesDTO(repository, repository, schemaContextFactory,
 195                 new NetconfStateSchemasResolverImpl());
 196     }
 197
 198     /**
 199      * Creates a <code>FilesystemSchemaSourceCache</code> for the custom schema cache directory.
 200      *
 201      * @param schemaCacheDirectory The custom cache directory relative to "cache"
 202      * @return A <code>FilesystemSchemaSourceCache</code> for the custom schema cache directory
 203      */
 204     private static FilesystemSchemaSourceCache<YangTextSchemaSource> createDeviceFilesystemCache(
 205             final String schemaCacheDirectory, final SchemaSourceRegistry schemaRegistry) {
 206         final String relativeSchemaCacheDirectory =
 207                 NetconfTopologyUtils.CACHE_DIRECTORY + File.separator + schemaCacheDirectory;
 208         return new FilesystemSchemaSourceCache<>(schemaRegistry, YangTextSchemaSource.class,
 209                 new File(relativeSchemaCacheDirectory));
 210     }
 211
 212
 213     public static RemoteDeviceId createRemoteDeviceId(final NodeId nodeId, final NetconfNode node) {
 214         final IpAddress ipAddress = node.getHost().getIpAddress();
 215         final InetSocketAddress address = new InetSocketAddress(ipAddress.getIpv4Address() != null
 216                 ? ipAddress.getIpv4Address().getValue() : ipAddress.getIpv6Address().getValue(),
 217                 node.getPort().getValue());
 218         return new RemoteDeviceId(nodeId.getValue(), address);
 219     }
 220
 221     public static String createActorPath(final String masterMember, final String name) {
 222         return  masterMember + "/user/" + name;
 223     }
 224
 225     public static String createMasterActorName(final String name, final String masterAddress) {
 226         return masterAddress.replaceAll("//", "") + "_" + name;
 227     }
 228
 229     public static NodeId getNodeId(final InstanceIdentifier.PathArgument pathArgument) {
 230         if (pathArgument instanceof InstanceIdentifier.IdentifiableItem) {
 231             final Identifier<?> key = ((InstanceIdentifier.IdentifiableItem<?, ?>) pathArgument).getKey();
 232             if (key instanceof NodeKey) {
 233                 return ((NodeKey) key).getNodeId();
 234             }
 235         }
 236         throw new IllegalStateException("Unable to create NodeId from: " + pathArgument);
 237     }
 238
 239     public static KeyedInstanceIdentifier<Topology, TopologyKey> createTopologyListPath(final String topologyId) {
 240         final InstanceIdentifier<NetworkTopology> networkTopology = InstanceIdentifier.create(NetworkTopology.class);
 241         return networkTopology.child(Topology.class, new TopologyKey(new TopologyId(topologyId)));
 242     }
 243
 244     public static InstanceIdentifier<Node> createTopologyNodeListPath(final NodeKey key, final String topologyId) {
 245         return createTopologyListPath(topologyId)
 246                 .child(Node.class, new NodeKey(new NodeId(key.getNodeId().getValue())));
 247     }
 248
 249     public static InstanceIdentifier<Node> createTopologyNodePath(final String topologyId) {
 250         return createTopologyListPath(topologyId).child(Node.class);
 251     }
 252
 253     public static DocumentedException createMasterIsDownException(final RemoteDeviceId id, final Exception cause) {
 254         return new DocumentedException(id + ":Master is down. Please try again.", cause,
 255                 DocumentedException.ErrorType.APPLICATION, DocumentedException.ErrorTag.OPERATION_FAILED,
 256                 DocumentedException.ErrorSeverity.WARNING);
 257     }
 258 }