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