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.restconf.nb.rfc8040.handlers.TransactionChainHandler;
  23 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  24 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  25
  26 /**
  27  * Implementation of RESTCONF operations using {@link DOMTransactionChain} and related concepts.
  28  *
  29  * @see DOMTransactionChain
  30  * @see DOMDataTreeReadWriteTransaction
  31  */
  32 public final class MdsalRestconfStrategy extends RestconfStrategy {
  33     private final DOMTransactionChain transactionChain;
  34
  35     public MdsalRestconfStrategy(final DOMDataBroker dataBroker) {
  36         this(new TransactionChainHandler(dataBroker));
  37     }
  38
  39     public MdsalRestconfStrategy(final TransactionChainHandler transactionChainHandler) {
  40         transactionChain = requireNonNull(transactionChainHandler).get();
  41     }
  42
  43     @Override
  44     public RestconfTransaction prepareWriteExecution() {
  45         return new MdsalRestconfTransaction(transactionChain);
  46     }
  47
  48     @Override
  49     public ListenableFuture<Optional<NormalizedNode<?, ?>>> read(final LogicalDatastoreType store,
  50                                                                  final YangInstanceIdentifier path) {
  51         try (DOMDataTreeReadTransaction tx = transactionChain.newReadOnlyTransaction()) {
  52             return tx.read(store, path);
  53         }
  54     }
  55
  56     @Override
  57     public ListenableFuture<Optional<NormalizedNode<?, ?>>> read(final LogicalDatastoreType store,
  58             final YangInstanceIdentifier path, final List<YangInstanceIdentifier> fields) {
  59         return Futures.immediateFailedFuture(new UnsupportedOperationException(
  60                 "Reading of selected subtrees is currently not supported in: " + MdsalRestconfStrategy.class));
  61     }
  62
  63     @Override
  64     public FluentFuture<Boolean> exists(final LogicalDatastoreType store, final YangInstanceIdentifier path) {
  65         try (DOMDataTreeReadTransaction tx = transactionChain.newReadOnlyTransaction()) {
  66             return tx.exists(store, path);
  67         }
  68     }
  69
  70     @Override
  71     public void close() {
  72         transactionChain.close();
  73     }
  74 }