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.ListenableFuture;
  14 import java.util.Optional;
  15 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  16 import org.opendaylight.mdsal.dom.api.DOMDataBroker;
  17 import org.opendaylight.mdsal.dom.api.DOMDataTreeReadTransaction;
  18 import org.opendaylight.mdsal.dom.api.DOMDataTreeReadWriteTransaction;
  19 import org.opendaylight.mdsal.dom.api.DOMTransactionChain;
  20 import org.opendaylight.restconf.nb.rfc8040.handlers.TransactionChainHandler;
  21 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  22 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  23
  24 /**
  25  * Implementation of RESTCONF operations using {@link DOMTransactionChain} and related concepts.
  26  *
  27  * @see DOMTransactionChain
  28  * @see DOMDataTreeReadWriteTransaction
  29  */
  30 public final class MdsalRestconfStrategy extends RestconfStrategy {
  31     private final DOMTransactionChain transactionChain;
  32
  33     public MdsalRestconfStrategy(final DOMDataBroker dataBroker) {
  34         this(new TransactionChainHandler(dataBroker));
  35     }
  36
  37     public MdsalRestconfStrategy(final TransactionChainHandler transactionChainHandler) {
  38         transactionChain = requireNonNull(transactionChainHandler).get();
  39     }
  40
  41     @Override
  42     public RestconfTransaction prepareWriteExecution() {
  43         return new MdsalRestconfTransaction(transactionChain);
  44     }
  45
  46     @Override
  47     public ListenableFuture<Optional<NormalizedNode<?, ?>>> read(final LogicalDatastoreType store,
  48                                                                  final YangInstanceIdentifier path) {
  49         try (DOMDataTreeReadTransaction tx = transactionChain.newReadOnlyTransaction()) {
  50             return tx.read(store, path);
  51         }
  52     }
  53
  54     @Override
  55     public FluentFuture<Boolean> exists(final LogicalDatastoreType store, final YangInstanceIdentifier path) {
  56         try (DOMDataTreeReadTransaction tx = transactionChain.newReadOnlyTransaction()) {
  57             return tx.exists(store, path);
  58         }
  59     }
  60
  61     @Override
  62     public void close() {
  63         transactionChain.close();
  64     }
  65 }