restconf/restconf-nb/src/main/java/org/opendaylight/restconf/server/mdsal/streams/devnotif/SubscribeDeviceNotificationRpc.java

   1 /*
   2  * Copyright (c) 2023 PANTHEON.tech, s.r.o. 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 package org.opendaylight.restconf.server.mdsal.streams.devnotif;
   9
  10 import static java.util.Objects.requireNonNull;
  11
  12 import java.net.URI;
  13 import javax.inject.Inject;
  14 import javax.inject.Singleton;
  15 import org.opendaylight.mdsal.dom.api.DOMMountPointService;
  16 import org.opendaylight.restconf.common.errors.RestconfDocumentedException;
  17 import org.opendaylight.restconf.common.errors.RestconfFuture;
  18 import org.opendaylight.restconf.nb.rfc8040.utils.parser.YangInstanceIdentifierSerializer;
  19 import org.opendaylight.restconf.server.api.OperationsPostResult;
  20 import org.opendaylight.restconf.server.spi.OperationInput;
  21 import org.opendaylight.restconf.server.spi.RestconfStream;
  22 import org.opendaylight.restconf.server.spi.RpcImplementation;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.device.notification.rev240218.SubscribeDeviceNotification;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.device.notification.rev240218.SubscribeDeviceNotificationInput;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.device.notification.rev240218.SubscribeDeviceNotificationOutput;
  26 import org.opendaylight.yangtools.yang.common.ErrorTag;
  27 import org.opendaylight.yangtools.yang.common.ErrorType;
  28 import org.opendaylight.yangtools.yang.common.QName;
  29 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  30 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
  31 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
  32 import org.opendaylight.yangtools.yang.data.spi.node.ImmutableNodes;
  33 import org.osgi.service.component.annotations.Activate;
  34 import org.osgi.service.component.annotations.Component;
  35 import org.osgi.service.component.annotations.Reference;
  36
  37 /**
  38  * RESTCONF implementation of {@link SubscribeDeviceNotification}.
  39  */
  40 @Singleton
  41 @Component
  42 public final class SubscribeDeviceNotificationRpc extends RpcImplementation {
  43     private static final NodeIdentifier DEVICE_NOTIFICATION_PATH_NODEID =
  44         NodeIdentifier.create(QName.create(SubscribeDeviceNotificationInput.QNAME, "path").intern());
  45     private static final NodeIdentifier DEVICE_NOTIFICATION_STREAM_NAME_NODEID =
  46         NodeIdentifier.create(QName.create(SubscribeDeviceNotificationInput.QNAME, "stream-name").intern());
  47
  48     private final DOMMountPointService mountPointService;
  49     private final RestconfStream.Registry streamRegistry;
  50
  51     @Inject
  52     @Activate
  53     public SubscribeDeviceNotificationRpc(@Reference final RestconfStream.Registry streamRegistry,
  54             @Reference final DOMMountPointService mountPointService) {
  55         super(SubscribeDeviceNotification.QNAME);
  56         this.mountPointService = requireNonNull(mountPointService);
  57         this.streamRegistry = requireNonNull(streamRegistry);
  58     }
  59
  60     @Override
  61     public RestconfFuture<OperationsPostResult> invoke(final URI restconfURI, final OperationInput input) {
  62         final var body = input.input();
  63         final var pathLeaf = body.childByArg(DEVICE_NOTIFICATION_PATH_NODEID);
  64         if (pathLeaf == null) {
  65             return RestconfFuture.failed(new RestconfDocumentedException("No path specified", ErrorType.APPLICATION,
  66                 ErrorTag.MISSING_ELEMENT));
  67         }
  68         final var pathLeafBody = pathLeaf.body();
  69         if (!(pathLeafBody instanceof YangInstanceIdentifier path)) {
  70             return RestconfFuture.failed(new RestconfDocumentedException("Unexpected path " + pathLeafBody,
  71                 ErrorType.APPLICATION, ErrorTag.BAD_ELEMENT));
  72         }
  73         if (!(path.getLastPathArgument() instanceof NodeIdentifierWithPredicates listId)) {
  74             return RestconfFuture.failed(new RestconfDocumentedException(path + " does not refer to a list item",
  75                 ErrorType.APPLICATION, ErrorTag.BAD_ELEMENT));
  76         }
  77         if (listId.size() != 1) {
  78             return RestconfFuture.failed(new RestconfDocumentedException(path + " uses multiple keys",
  79                 ErrorType.APPLICATION, ErrorTag.INVALID_VALUE));
  80         }
  81
  82         return streamRegistry.createStream(restconfURI, new DeviceNotificationSource(mountPointService, path),
  83             "All YANG notifications occuring on mount point /"
  84                 + new YangInstanceIdentifierSerializer(input.databind()).serializePath(path))
  85             .transform(stream -> input.newOperationOutput(ImmutableNodes.newContainerBuilder()
  86                 .withNodeIdentifier(new NodeIdentifier(SubscribeDeviceNotificationOutput.QNAME))
  87                 .withChild(ImmutableNodes.leafNode(DEVICE_NOTIFICATION_STREAM_NAME_NODEID, stream.name()))
  88                 .build()));
  89     }
  90 }