restconf/restconf-nb-rfc8040/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.FluentFuture;
  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.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.yangtools.yang.data.api.YangInstanceIdentifier;
  24 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  25 import org.slf4j.Logger;
  26 import org.slf4j.LoggerFactory;
  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 static final Logger LOG = LoggerFactory.getLogger(NetconfRestconfStrategy.class);
  35
  36     private final NetconfDataTreeService netconfService;
  37
  38     public NetconfRestconfStrategy(final NetconfDataTreeService netconfService) {
  39         this.netconfService = requireNonNull(netconfService);
  40     }
  41
  42     @Override
  43     public RestconfTransaction prepareWriteExecution() {
  44         return new NetconfRestconfTransaction(netconfService);
  45     }
  46
  47     @Override
  48     public ListenableFuture<Optional<NormalizedNode>> read(final LogicalDatastoreType store,
  49             final YangInstanceIdentifier path) {
  50         switch (store) {
  51             case CONFIGURATION:
  52                 return netconfService.getConfig(path);
  53             case OPERATIONAL:
  54                 return netconfService.get(path);
  55             default:
  56                 LOG.info("Unknown datastore type: {}.", store);
  57                 throw new IllegalArgumentException(String.format(
  58                         "%s, Cannot read data %s for %s datastore, unknown datastore type",
  59                         netconfService.getDeviceId(), path, store));
  60         }
  61     }
  62
  63     @Override
  64     public ListenableFuture<Optional<NormalizedNode>> read(final LogicalDatastoreType store,
  65             final YangInstanceIdentifier path, final List<YangInstanceIdentifier> fields) {
  66         switch (store) {
  67             case CONFIGURATION:
  68                 return netconfService.getConfig(path, fields);
  69             case OPERATIONAL:
  70                 return netconfService.get(path, fields);
  71             default:
  72                 LOG.info("Unknown datastore type: {}.", store);
  73                 throw new IllegalArgumentException(String.format(
  74                         "%s, Cannot read data %s with fields %s for %s datastore, unknown datastore type",
  75                         netconfService.getDeviceId(), path, fields, store));
  76         }
  77     }
  78
  79     @Override
  80     public FluentFuture<Boolean> exists(final LogicalDatastoreType store, final YangInstanceIdentifier path) {
  81         return remapException(read(store, path))
  82                 .transform(optionalNode -> optionalNode != null && optionalNode.isPresent(),
  83                         MoreExecutors.directExecutor());
  84     }
  85
  86     private static <T> FluentFuture<T> remapException(final ListenableFuture<T> input) {
  87         final SettableFuture<T> ret = SettableFuture.create();
  88         Futures.addCallback(input, new FutureCallback<T>() {
  89
  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 FluentFuture.from(ret);
 102     }
 103 }