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