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