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.opendaylight.mdsal.common.api.LogicalDatastoreType;
  20 import org.opendaylight.mdsal.common.api.ReadFailedException;
  21 import org.opendaylight.netconf.dom.api.NetconfDataTreeService;
  22 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  23 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  24
  25 /**
  26  * Implementation of RESTCONF operations on top of a raw NETCONF backend.
  27  *
  28  * @see NetconfDataTreeService
  29  */
  30 public final class NetconfRestconfStrategy extends RestconfStrategy {
  31     private final NetconfDataTreeService netconfService;
  32
  33     public NetconfRestconfStrategy(final NetconfDataTreeService netconfService) {
  34         this.netconfService = requireNonNull(netconfService);
  35     }
  36
  37     @Override
  38     public RestconfTransaction prepareWriteExecution() {
  39         return new NetconfRestconfTransaction(netconfService);
  40     }
  41
  42     @Override
  43     public ListenableFuture<Optional<NormalizedNode>> read(final LogicalDatastoreType store,
  44             final YangInstanceIdentifier path) {
  45         return switch (store) {
  46             case CONFIGURATION -> netconfService.getConfig(path);
  47             case OPERATIONAL -> netconfService.get(path);
  48         };
  49     }
  50
  51     @Override
  52     public ListenableFuture<Optional<NormalizedNode>> read(final LogicalDatastoreType store,
  53             final YangInstanceIdentifier path, final List<YangInstanceIdentifier> fields) {
  54         return switch (store) {
  55             case CONFIGURATION -> netconfService.getConfig(path, fields);
  56             case OPERATIONAL -> netconfService.get(path, fields);
  57         };
  58     }
  59
  60     @Override
  61     public ListenableFuture<Boolean> exists(final LogicalDatastoreType store, final YangInstanceIdentifier path) {
  62         return Futures.transform(remapException(read(store, path)),
  63             optionalNode -> optionalNode != null && optionalNode.isPresent(),
  64             MoreExecutors.directExecutor());
  65     }
  66
  67     private static <T> ListenableFuture<T> remapException(final ListenableFuture<T> input) {
  68         final var ret = SettableFuture.<T>create();
  69         Futures.addCallback(input, new FutureCallback<T>() {
  70             @Override
  71             public void onSuccess(final T result) {
  72                 ret.set(result);
  73             }
  74
  75             @Override
  76             public void onFailure(final Throwable cause) {
  77                 ret.setException(cause instanceof ReadFailedException ? cause
  78                     : new ReadFailedException("NETCONF operation failed", cause));
  79             }
  80         }, MoreExecutors.directExecutor());
  81         return ret;
  82     }
  83 }