restconf/restconf-nb-rfc8040/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.FluentFuture;
  13 import com.google.common.util.concurrent.Futures;
  14 import com.google.common.util.concurrent.ListenableFuture;
  15 import java.util.List;
  16 import java.util.Optional;
  17 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  18 import org.opendaylight.mdsal.dom.api.DOMDataBroker;
  19 import org.opendaylight.mdsal.dom.api.DOMDataTreeReadTransaction;
  20 import org.opendaylight.mdsal.dom.api.DOMDataTreeReadWriteTransaction;
  21 import org.opendaylight.mdsal.dom.api.DOMTransactionChain;
  22 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  23 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  24
  25 /**
  26  * Implementation of RESTCONF operations using {@link DOMTransactionChain} and related concepts.
  27  *
  28  * @see DOMTransactionChain
  29  * @see DOMDataTreeReadWriteTransaction
  30  */
  31 public final class MdsalRestconfStrategy extends RestconfStrategy {
  32     private final DOMDataBroker dataBroker;
  33
  34     public MdsalRestconfStrategy(final DOMDataBroker dataBroker) {
  35         this.dataBroker = requireNonNull(dataBroker);
  36     }
  37
  38     @Override
  39     public RestconfTransaction prepareWriteExecution() {
  40         return new MdsalRestconfTransaction(dataBroker);
  41     }
  42
  43     @Override
  44     public ListenableFuture<Optional<NormalizedNode>> read(final LogicalDatastoreType store,
  45             final YangInstanceIdentifier path) {
  46         try (DOMDataTreeReadTransaction tx = dataBroker.newReadOnlyTransaction()) {
  47             return tx.read(store, path);
  48         }
  49     }
  50
  51     @Override
  52     public ListenableFuture<Optional<NormalizedNode>> read(final LogicalDatastoreType store,
  53             final YangInstanceIdentifier path, final List<YangInstanceIdentifier> fields) {
  54         return Futures.immediateFailedFuture(new UnsupportedOperationException(
  55                 "Reading of selected subtrees is currently not supported in: " + MdsalRestconfStrategy.class));
  56     }
  57
  58     @Override
  59     public FluentFuture<Boolean> exists(final LogicalDatastoreType store, final YangInstanceIdentifier path) {
  60         try (DOMDataTreeReadTransaction tx = dataBroker.newReadOnlyTransaction()) {
  61             return tx.exists(store, path);
  62         }
  63     }
  64 }