restconf/restconf-nb/src/main/java/org/opendaylight/restconf/nb/rfc8040/rests/transactions/NetconfRestconfStrategy.java

   1 /*
   2  * Copyright (c) 2020 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.nb.rfc8040.rests.transactions;
   9
  10 import static java.util.Objects.requireNonNull;
  11
  12 import com.google.common.collect.ImmutableMap;
  13 import com.google.common.util.concurrent.FutureCallback;
  14 import com.google.common.util.concurrent.Futures;
  15 import com.google.common.util.concurrent.ListenableFuture;
  16 import com.google.common.util.concurrent.MoreExecutors;
  17 import com.google.common.util.concurrent.SettableFuture;
  18 import java.util.List;
  19 import java.util.Optional;
  20 import org.eclipse.jdt.annotation.Nullable;
  21 import org.opendaylight.mdsal.common.api.CommitInfo;
  22 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  23 import org.opendaylight.mdsal.common.api.ReadFailedException;
  24 import org.opendaylight.mdsal.dom.api.DOMRpcService;
  25 import org.opendaylight.mdsal.dom.api.DOMYangTextSourceProvider;
  26 import org.opendaylight.netconf.dom.api.NetconfDataTreeService;
  27 import org.opendaylight.restconf.common.errors.SettableRestconfFuture;
  28 import org.opendaylight.restconf.server.api.DatabindContext;
  29 import org.opendaylight.yangtools.yang.common.Empty;
  30 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  31 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  32
  33 /**
  34  * Implementation of RESTCONF operations on top of a raw NETCONF backend.
  35  *
  36  * @see NetconfDataTreeService
  37  */
  38 public final class NetconfRestconfStrategy extends RestconfStrategy {
  39     private final NetconfDataTreeService netconfService;
  40
  41     public NetconfRestconfStrategy(final DatabindContext databind, final NetconfDataTreeService netconfService,
  42             final @Nullable DOMRpcService rpcService, final @Nullable DOMYangTextSourceProvider sourceProvider) {
  43         super(databind, ImmutableMap.of(), rpcService, sourceProvider);
  44         this.netconfService = requireNonNull(netconfService);
  45     }
  46
  47     @Override
  48     void delete(final SettableRestconfFuture<Empty> future, final YangInstanceIdentifier path) {
  49         final var tx = prepareWriteExecution();
  50         tx.delete(path);
  51         Futures.addCallback(tx.commit(), new FutureCallback<CommitInfo>() {
  52             @Override
  53             public void onSuccess(final CommitInfo result) {
  54                 future.set(Empty.value());
  55             }
  56
  57             @Override
  58             public void onFailure(final Throwable cause) {
  59                 future.setFailure(TransactionUtil.decodeException(cause, "DELETE", path, modelContext()));
  60             }
  61         }, MoreExecutors.directExecutor());
  62     }
  63
  64     @Override
  65     RestconfTransaction prepareWriteExecution() {
  66         return new NetconfRestconfTransaction(modelContext(), netconfService);
  67     }
  68
  69     @Override
  70     ListenableFuture<Optional<NormalizedNode>> read(final LogicalDatastoreType store,
  71             final YangInstanceIdentifier path) {
  72         return switch (store) {
  73             case CONFIGURATION -> netconfService.getConfig(path);
  74             case OPERATIONAL -> netconfService.get(path);
  75         };
  76     }
  77
  78     @Override
  79     ListenableFuture<Optional<NormalizedNode>> read(final LogicalDatastoreType store,
  80             final YangInstanceIdentifier path, final List<YangInstanceIdentifier> fields) {
  81         return switch (store) {
  82             case CONFIGURATION -> netconfService.getConfig(path, fields);
  83             case OPERATIONAL -> netconfService.get(path, fields);
  84         };
  85     }
  86
  87     @Override
  88     ListenableFuture<Boolean> exists(final YangInstanceIdentifier path) {
  89         return Futures.transform(remapException(netconfService.getConfig(path)),
  90             optionalNode -> optionalNode != null && optionalNode.isPresent(),
  91             MoreExecutors.directExecutor());
  92     }
  93
  94     private static <T> ListenableFuture<T> remapException(final ListenableFuture<T> input) {
  95         final var ret = SettableFuture.<T>create();
  96         Futures.addCallback(input, new FutureCallback<T>() {
  97             @Override
  98             public void onSuccess(final T result) {
  99                 ret.set(result);
 100             }
 101
 102             @Override
 103             public void onFailure(final Throwable cause) {
 104                 ret.setException(cause instanceof ReadFailedException ? cause
 105                     : new ReadFailedException("NETCONF operation failed", cause));
 106             }
 107         }, MoreExecutors.directExecutor());
 108         return ret;
 109     }
 110 }