restconf/restconf-nb/src/main/java/org/opendaylight/restconf/nb/rfc8040/rests/services/impl/RestconfInvokeOperationsServiceImpl.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 package org.opendaylight.restconf.nb.rfc8040.rests.services.impl;
   9
  10 import static java.util.Objects.requireNonNull;
  11
  12 import com.google.common.annotations.VisibleForTesting;
  13 import com.google.common.base.Throwables;
  14 import com.google.common.util.concurrent.FutureCallback;
  15 import com.google.common.util.concurrent.Futures;
  16 import com.google.common.util.concurrent.ListenableFuture;
  17 import com.google.common.util.concurrent.MoreExecutors;
  18 import java.util.List;
  19 import java.util.concurrent.ExecutionException;
  20 import javax.ws.rs.Path;
  21 import javax.ws.rs.WebApplicationException;
  22 import javax.ws.rs.container.AsyncResponse;
  23 import javax.ws.rs.core.Response.Status;
  24 import javax.ws.rs.core.UriInfo;
  25 import org.eclipse.jdt.annotation.NonNull;
  26 import org.opendaylight.mdsal.dom.api.DOMMountPoint;
  27 import org.opendaylight.mdsal.dom.api.DOMMountPointService;
  28 import org.opendaylight.mdsal.dom.api.DOMRpcException;
  29 import org.opendaylight.mdsal.dom.api.DOMRpcResult;
  30 import org.opendaylight.mdsal.dom.api.DOMRpcService;
  31 import org.opendaylight.mdsal.dom.spi.DefaultDOMRpcResult;
  32 import org.opendaylight.restconf.common.context.InstanceIdentifierContext;
  33 import org.opendaylight.restconf.common.errors.RestconfDocumentedException;
  34 import org.opendaylight.restconf.nb.rfc8040.legacy.NormalizedNodePayload;
  35 import org.opendaylight.restconf.nb.rfc8040.rests.services.api.RestconfInvokeOperationsService;
  36 import org.opendaylight.restconf.nb.rfc8040.streams.StreamsConfiguration;
  37 import org.opendaylight.yang.gen.v1.urn.opendaylight.device.notification.rev221106.SubscribeDeviceNotificationInput;
  38 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.remote.rev140114.CreateDataChangeEventSubscriptionInput;
  39 import org.opendaylight.yangtools.yang.common.ErrorTag;
  40 import org.opendaylight.yangtools.yang.common.ErrorType;
  41 import org.opendaylight.yangtools.yang.common.QName;
  42 import org.opendaylight.yangtools.yang.common.QNameModule;
  43 import org.opendaylight.yangtools.yang.common.RpcResultBuilder;
  44 import org.opendaylight.yangtools.yang.common.YangConstants;
  45 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
  46 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  47 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNodes;
  48 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
  49 import org.opendaylight.yangtools.yang.model.api.SchemaNode;
  50 import org.slf4j.Logger;
  51 import org.slf4j.LoggerFactory;
  52
  53 /**
  54  * Implementation of {@link RestconfInvokeOperationsService}.
  55  *
  56  */
  57 @Path("/")
  58 public class RestconfInvokeOperationsServiceImpl implements RestconfInvokeOperationsService {
  59     private static final Logger LOG = LoggerFactory.getLogger(RestconfInvokeOperationsServiceImpl.class);
  60
  61     // FIXME: at some point we do not want to have this here, as this is only used for dispatch
  62     private static final QNameModule SAL_REMOTE_NAMESPACE = CreateDataChangeEventSubscriptionInput.QNAME.getModule();
  63     private static final QNameModule DEVICE_NOTIFICATION_NAMESPACE = SubscribeDeviceNotificationInput.QNAME.getModule();
  64
  65     private final DOMRpcService rpcService;
  66     private final DOMMountPointService mountPointService;
  67     private final SubscribeToStreamUtil streamUtils;
  68
  69     public RestconfInvokeOperationsServiceImpl(final DOMRpcService rpcService,
  70             final DOMMountPointService mountPointService, final StreamsConfiguration configuration) {
  71         this.rpcService = requireNonNull(rpcService);
  72         this.mountPointService = requireNonNull(mountPointService);
  73         streamUtils = configuration.useSSE() ? SubscribeToStreamUtil.serverSentEvents()
  74             : SubscribeToStreamUtil.webSockets();
  75     }
  76
  77     @Override
  78     public void invokeRpc(final String identifier, final NormalizedNodePayload payload, final UriInfo uriInfo,
  79             final AsyncResponse ar) {
  80         final InstanceIdentifierContext context = payload.getInstanceIdentifierContext();
  81         final EffectiveModelContext schemaContext = context.getSchemaContext();
  82         final DOMMountPoint mountPoint = context.getMountPoint();
  83         final SchemaNode schema = context.getSchemaNode();
  84         final QName rpcName = schema.getQName();
  85
  86         final ListenableFuture<? extends DOMRpcResult> future;
  87         if (mountPoint == null) {
  88             // FIXME: this really should be a normal RPC invocation service which has its own interface with JAX-RS,
  89             //        except ... we check 'identifier' for .contains() instead of exact RPC name!
  90             if (SAL_REMOTE_NAMESPACE.equals(rpcName.getModule())) {
  91                 if (identifier.contains("create-data-change-event-subscription")) {
  92                     future = Futures.immediateFuture(
  93                         CreateStreamUtil.createDataChangeNotifiStream(payload, schemaContext));
  94                 } else {
  95                     future = Futures.immediateFailedFuture(new RestconfDocumentedException("Unsupported operation",
  96                         ErrorType.RPC, ErrorTag.OPERATION_NOT_SUPPORTED));
  97                 }
  98             } else if (DEVICE_NOTIFICATION_NAMESPACE.equals(rpcName.getModule())) {
  99                 // FIXME: this should be a match on RPC QName
 100                 final String baseUrl = streamUtils.prepareUriByStreamName(uriInfo, "").toString();
 101                 future = Futures.immediateFuture(CreateStreamUtil.createDeviceNotificationListener(baseUrl, payload,
 102                     streamUtils, mountPointService));
 103             } else {
 104                 future = invokeRpc((ContainerNode)payload.getData(), rpcName, rpcService);
 105             }
 106         } else {
 107             future = invokeRpc(payload.getData(), rpcName, mountPoint);
 108         }
 109
 110         Futures.addCallback(future, new FutureCallback<DOMRpcResult>() {
 111             @Override
 112             public void onSuccess(final DOMRpcResult response) {
 113                 final var errors = response.getErrors();
 114                 if (!errors.isEmpty()) {
 115                     LOG.debug("RpcError message {}", response.getErrors());
 116                     ar.resume(new RestconfDocumentedException("RPCerror message ", null, response.getErrors()));
 117                     return;
 118                 }
 119
 120                 final NormalizedNode resultData = response.getResult();
 121                 if (resultData == null || ((ContainerNode) resultData).isEmpty()) {
 122                     ar.resume(new WebApplicationException(Status.NO_CONTENT));
 123                 } else {
 124                     ar.resume(NormalizedNodePayload.of(context, resultData));
 125                 }
 126             }
 127
 128             @Override
 129             public void onFailure(final Throwable failure) {
 130                 ar.resume(failure);
 131             }
 132         }, MoreExecutors.directExecutor());
 133     }
 134
 135     /**
 136      * Invoking rpc via mount point.
 137      *
 138      * @param mountPoint mount point
 139      * @param data input data
 140      * @param rpc RPC type
 141      * @return {@link DOMRpcResult}
 142      */
 143     @VisibleForTesting
 144     static ListenableFuture<? extends DOMRpcResult> invokeRpc(final NormalizedNode data, final QName rpc,
 145             final DOMMountPoint mountPoint) {
 146         return invokeRpc((ContainerNode) data, rpc, mountPoint.getService(DOMRpcService.class).orElseThrow(() -> {
 147             final String errmsg = "RPC service is missing.";
 148             LOG.debug(errmsg);
 149             return new RestconfDocumentedException(errmsg);
 150         }));
 151     }
 152
 153     /**
 154      * Invoke rpc.
 155      *
 156      * @param data input data
 157      * @param rpc RPC type
 158      * @param rpcService rpc service to invoke rpc
 159      * @return {@link DOMRpcResult}
 160      */
 161     @VisibleForTesting
 162     static ListenableFuture<? extends DOMRpcResult> invokeRpc(final ContainerNode data, final QName rpc,
 163             final DOMRpcService rpcService) {
 164         return Futures.catching(rpcService.invokeRpc(rpc, nonnullInput(rpc, data)),
 165             DOMRpcException.class,
 166             cause -> new DefaultDOMRpcResult(List.of(RpcResultBuilder.newError(ErrorType.RPC, ErrorTag.OPERATION_FAILED,
 167                 cause.getMessage()))),
 168             MoreExecutors.directExecutor());
 169     }
 170
 171     private static @NonNull ContainerNode nonnullInput(final QName type, final ContainerNode input) {
 172         return input != null ? input
 173                 : ImmutableNodes.containerNode(YangConstants.operationInputQName(type.getModule()));
 174     }
 175
 176     @Deprecated
 177     static <T> T checkedGet(final ListenableFuture<T> future) {
 178         try {
 179             return future.get();
 180         } catch (InterruptedException e) {
 181             throw new RestconfDocumentedException("Interrupted while waiting for result of invocation", e);
 182         } catch (ExecutionException e) {
 183             Throwables.throwIfInstanceOf(e.getCause(), RestconfDocumentedException.class);
 184             throw new RestconfDocumentedException("Invocation failed", e);
 185         }
 186     }
 187 }