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