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.yangtools.yang.common.Empty;
  29 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  30 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  31 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
  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 EffectiveModelContext modelContext,
  42             final NetconfDataTreeService netconfService, final @Nullable DOMRpcService rpcService,
  43             final @Nullable DOMYangTextSourceProvider sourceProvider) {
  44         super(modelContext, ImmutableMap.of(), rpcService, sourceProvider);
  45         this.netconfService = requireNonNull(netconfService);
  46     }
  47
  48     @Override
  49     void delete(final SettableRestconfFuture<Empty> future, final YangInstanceIdentifier path) {
  50         final var tx = prepareWriteExecution();
  51         tx.delete(path);
  52         Futures.addCallback(tx.commit(), new FutureCallback<CommitInfo>() {
  53             @Override
  54             public void onSuccess(final CommitInfo result) {
  55                 future.set(Empty.value());
  56             }
  57
  58             @Override
  59             public void onFailure(final Throwable cause) {
  60                 future.setFailure(TransactionUtil.decodeException(cause, "DELETE", path, modelContext()));
  61             }
  62         }, MoreExecutors.directExecutor());
  63     }
  64
  65     @Override
  66     RestconfTransaction prepareWriteExecution() {
  67         return new NetconfRestconfTransaction(modelContext(), netconfService);
  68     }
  69
  70     @Override
  71     ListenableFuture<Optional<NormalizedNode>> read(final LogicalDatastoreType store,
  72             final YangInstanceIdentifier path) {
  73         return switch (store) {
  74             case CONFIGURATION -> netconfService.getConfig(path);
  75             case OPERATIONAL -> netconfService.get(path);
  76         };
  77     }
  78
  79     @Override
  80     ListenableFuture<Optional<NormalizedNode>> read(final LogicalDatastoreType store,
  81             final YangInstanceIdentifier path, final List<YangInstanceIdentifier> fields) {
  82         return switch (store) {
  83             case CONFIGURATION -> netconfService.getConfig(path, fields);
  84             case OPERATIONAL -> netconfService.get(path, fields);
  85         };
  86     }
  87
  88     @Override
  89     ListenableFuture<Boolean> exists(final YangInstanceIdentifier path) {
  90         return Futures.transform(remapException(netconfService.getConfig(path)),
  91             optionalNode -> optionalNode != null && optionalNode.isPresent(),
  92             MoreExecutors.directExecutor());
  93     }
  94
  95     private static <T> ListenableFuture<T> remapException(final ListenableFuture<T> input) {
  96         final var ret = SettableFuture.<T>create();
  97         Futures.addCallback(input, new FutureCallback<T>() {
  98             @Override
  99             public void onSuccess(final T result) {
 100                 ret.set(result);
 101             }
 102
 103             @Override
 104             public void onFailure(final Throwable cause) {
 105                 ret.setException(cause instanceof ReadFailedException ? cause
 106                     : new ReadFailedException("NETCONF operation failed", cause));
 107             }
 108         }, MoreExecutors.directExecutor());
 109         return ret;
 110     }
 111 }