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/*
* Copyright (c) 2016 Cisco and/or its affiliates.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.fd.honeycomb.v3po.translate.util.read;
import com.google.common.base.Optional;
import com.google.common.util.concurrent.CheckedFuture;
import io.fd.honeycomb.v3po.translate.read.ReadContext;
import io.fd.honeycomb.v3po.translate.read.ReadFailedException;
import io.fd.honeycomb.v3po.translate.read.Reader;
import javax.annotation.Nonnull;
import org.opendaylight.controller.md.sal.binding.api.DataBroker;
import org.opendaylight.controller.md.sal.binding.api.ReadOnlyTransaction;
import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
import org.opendaylight.yangtools.yang.binding.DataObject;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
/**
* Simple DataBroker backed reader allowing to delegate reads to different brokers
*/
public final class BindingBrokerReader<D extends DataObject> implements Reader<D> {
private final InstanceIdentifier<D> instanceIdentifier;
private final DataBroker dataBroker;
private final LogicalDatastoreType datastoreType;
public BindingBrokerReader(final Class<D> managedDataObjectType, final DataBroker dataBroker,
final LogicalDatastoreType datastoreType) {
this.dataBroker = dataBroker;
this.datastoreType = datastoreType;
this.instanceIdentifier = InstanceIdentifier.create(managedDataObjectType);
}
@Nonnull
@Override
public Optional<? extends DataObject> read(@Nonnull final InstanceIdentifier<? extends DataObject> id,
@Nonnull final ReadContext ctx) throws ReadFailedException {
try (final ReadOnlyTransaction readOnlyTransaction = dataBroker.newReadOnlyTransaction()) {
final CheckedFuture<? extends Optional<? extends DataObject>, org.opendaylight.controller.md.sal.common.api.data.ReadFailedException>
read = readOnlyTransaction.read(datastoreType, id);
try {
return read.checkedGet();
} catch (org.opendaylight.controller.md.sal.common.api.data.ReadFailedException e) {
throw new ReadFailedException(id, e);
}
}
}
@Nonnull
@Override
public InstanceIdentifier<D> getManagedDataObjectType() {
return instanceIdentifier;
}
}
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