restconf/restconf-nb/src/main/java/org/opendaylight/restconf/nb/rfc8040/rests/transactions/MdsalRestconfStrategy.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.Futures;
  13 import com.google.common.util.concurrent.ListenableFuture;
  14 import java.util.List;
  15 import java.util.Optional;
  16 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  17 import org.opendaylight.mdsal.dom.api.DOMDataBroker;
  18 import org.opendaylight.mdsal.dom.api.DOMDataTreeReadWriteTransaction;
  19 import org.opendaylight.mdsal.dom.api.DOMTransactionChain;
  20 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  21 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  22
  23 /**
  24  * Implementation of RESTCONF operations using {@link DOMTransactionChain} and related concepts.
  25  *
  26  * @see DOMTransactionChain
  27  * @see DOMDataTreeReadWriteTransaction
  28  */
  29 public final class MdsalRestconfStrategy extends RestconfStrategy {
  30     private final DOMDataBroker dataBroker;
  31
  32     public MdsalRestconfStrategy(final DOMDataBroker dataBroker) {
  33         this.dataBroker = requireNonNull(dataBroker);
  34     }
  35
  36     @Override
  37     public RestconfTransaction prepareWriteExecution() {
  38         return new MdsalRestconfTransaction(dataBroker);
  39     }
  40
  41     @Override
  42     public ListenableFuture<Optional<NormalizedNode>> read(final LogicalDatastoreType store,
  43             final YangInstanceIdentifier path) {
  44         try (var tx = dataBroker.newReadOnlyTransaction()) {
  45             return tx.read(store, path);
  46         }
  47     }
  48
  49     @Override
  50     public ListenableFuture<Optional<NormalizedNode>> read(final LogicalDatastoreType store,
  51             final YangInstanceIdentifier path, final List<YangInstanceIdentifier> fields) {
  52         return Futures.immediateFailedFuture(new UnsupportedOperationException(
  53                 "Reading of selected subtrees is currently not supported in: " + MdsalRestconfStrategy.class));
  54     }
  55
  56     @Override
  57     public ListenableFuture<Boolean> exists(final LogicalDatastoreType store, final YangInstanceIdentifier path) {
  58         try (var tx = dataBroker.newReadOnlyTransaction()) {
  59             return tx.exists(store, path);
  60         }
  61     }
  62 }