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