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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.data.impl;
import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.util.concurrent.Futures.immediateCheckedFuture;
import com.google.common.base.Optional;
import com.google.common.util.concurrent.CheckedFuture;
import io.fd.honeycomb.data.DataModification;
import io.fd.honeycomb.data.ModifiableDataManager;
import io.fd.honeycomb.translate.TranslationException;
import javax.annotation.Nonnull;
import org.apache.commons.lang3.builder.RecursiveToStringStyle;
import org.apache.commons.lang3.builder.ReflectionToStringBuilder;
import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTree;
import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeModification;
import org.opendaylight.yangtools.yang.data.api.schema.tree.DataValidationFailedException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* DataTree backed implementation for modifiable data manager.
*/
public class ModifiableDataTreeManager implements ModifiableDataManager {
private static final Logger LOG = LoggerFactory.getLogger(ModifiableDataTreeManager.class);
private final DataTree dataTree;
public ModifiableDataTreeManager(@Nonnull final DataTree dataTree) {
this.dataTree = checkNotNull(dataTree, "dataTree should not be null");
}
@Override
public DataModification newModification() {
return new ConfigSnapshot();
}
@Override
public final CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> read(@Nonnull final YangInstanceIdentifier path) {
return newModification().read(path);
}
protected class ConfigSnapshot implements DataModification {
private final DataTreeModification modification;
private boolean validated = false;
ConfigSnapshot() {
this(dataTree.takeSnapshot().newModification());
}
protected ConfigSnapshot(final DataTreeModification modification) {
this.modification = modification;
}
@Override
public CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> read(
@Nonnull final YangInstanceIdentifier path) {
final Optional<NormalizedNode<?, ?>> node = modification.readNode(path);
if (LOG.isTraceEnabled() && node.isPresent()) {
LOG.trace("ConfigSnapshot.read: {}", node.get());
}
return immediateCheckedFuture(node);
}
@Override
public final void delete(final YangInstanceIdentifier path) {
modification.delete(path);
}
@Override
public final void merge(final YangInstanceIdentifier path, final NormalizedNode<?, ?> data) {
modification.merge(path, data);
}
@Override
public final void write(final YangInstanceIdentifier path, final NormalizedNode<?, ?> data) {
modification.write(path, data);
}
@Override
public final void commit() throws DataValidationFailedException, TranslationException {
if(!validated) {
validate();
}
final DataTreeCandidate candidate = dataTree.prepare(modification);
processCandidate(candidate);
dataTree.commit(candidate);
}
protected void processCandidate(final DataTreeCandidate candidate) throws TranslationException {
// NOOP
}
@Override
public final void validate() throws DataValidationFailedException {
modification.ready();
dataTree.validate(modification);
validated = true;
}
@Override
public String toString() {
return "ConfigSnapshot{" +
"modification=" +
ReflectionToStringBuilder.toString(
modification,
RecursiveToStringStyle.MULTI_LINE_STYLE,
false,
false
) + ", validated=" + validated + '}';
}
}
}
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