gerrit.fd Code Review - hc2vpp.git/blob

   1 /*
   2  * Copyright (c) 2016 Cisco and/or its affiliates.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at:
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 package io.fd.honeycomb.v3po.translate.util.read;
  18
  19 import com.google.common.base.Optional;
  20 import com.google.common.util.concurrent.CheckedFuture;
  21 import io.fd.honeycomb.v3po.translate.read.ReadContext;
  22 import io.fd.honeycomb.v3po.translate.read.ReadFailedException;
  23 import io.fd.honeycomb.v3po.translate.read.Reader;
  24 import javax.annotation.Nonnull;
  25 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  26 import org.opendaylight.controller.md.sal.binding.api.ReadOnlyTransaction;
  27 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  28 import org.opendaylight.yangtools.concepts.Builder;
  29 import org.opendaylight.yangtools.yang.binding.DataObject;
  30 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  31
  32 /**
  33  * Simple DataBroker backed reader allowing to delegate reads to different brokers.
  34  */
  35 public final class BindingBrokerReader<D extends DataObject, B extends Builder<D>>
  36         implements Reader<D, B>, AutoCloseable {
  37
  38     private final InstanceIdentifier<D> instanceIdentifier;
  39     private final DataBroker dataBroker;
  40     private final LogicalDatastoreType datastoreType;
  41     private final ReflexiveReaderCustomizer<D, B> reflexiveReaderCustomizer;
  42
  43     public BindingBrokerReader(final InstanceIdentifier<D> instanceIdentifier,
  44                                final DataBroker dataBroker,
  45                                final LogicalDatastoreType datastoreType,
  46                                final Class<B> builderClass) {
  47         this.reflexiveReaderCustomizer = new ReflexiveReaderCustomizer<>(instanceIdentifier.getTargetType(), builderClass);
  48         this.instanceIdentifier = instanceIdentifier;
  49         this.dataBroker = dataBroker;
  50         this.datastoreType = datastoreType;
  51     }
  52
  53     @Nonnull
  54     @Override
  55     public Optional<? extends DataObject> read(@Nonnull final InstanceIdentifier<? extends DataObject> id,
  56                                                @Nonnull final ReadContext ctx) throws ReadFailedException {
  57         try (final ReadOnlyTransaction readOnlyTransaction = dataBroker.newReadOnlyTransaction()) {
  58             final CheckedFuture<? extends Optional<? extends DataObject>, org.opendaylight.controller.md.sal.common.api.data.ReadFailedException>
  59                 read = readOnlyTransaction.read(datastoreType, id);
  60             try {
  61                 return read.checkedGet();
  62             } catch (org.opendaylight.controller.md.sal.common.api.data.ReadFailedException e) {
  63                 throw new ReadFailedException(id, e);
  64             }
  65         }
  66     }
  67
  68     @Override
  69     public void merge(@Nonnull final Builder<? extends DataObject> parentBuilder, @Nonnull final D readValue) {
  70         reflexiveReaderCustomizer.merge(parentBuilder, readValue);
  71     }
  72
  73     @Nonnull
  74     @Override
  75     public B getBuilder(final InstanceIdentifier<D> id) {
  76         return reflexiveReaderCustomizer.getBuilder(id);
  77     }
  78
  79     @Override
  80     public void readCurrentAttributes(@Nonnull final InstanceIdentifier<D> id,
  81                                       @Nonnull final B builder,
  82                                       @Nonnull final ReadContext ctx) throws ReadFailedException {
  83         throw new UnsupportedOperationException("Not supported");
  84     }
  85
  86     @Nonnull
  87     @Override
  88     public InstanceIdentifier<D> getManagedDataObjectType() {
  89         return instanceIdentifier;
  90     }
  91
  92     @Override
  93     public void close() throws Exception {
  94         // Noop
  95     }
  96 }