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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.translate.write.registry;
import com.google.common.annotations.Beta;
import com.google.common.collect.Multimap;
import com.google.common.collect.Sets;
import io.fd.honeycomb.translate.TranslationException;
import io.fd.honeycomb.translate.write.DataObjectUpdate;
import io.fd.honeycomb.translate.write.WriteContext;
import io.fd.honeycomb.translate.write.Writer;
import java.util.Set;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import javax.annotation.Nonnull;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
/**
* Special {@link Writer} capable of performing bulk updates.
*/
@Beta
public interface WriterRegistry {
/**
* Performs bulk update.
*
* @throws TranslationException in case update fails or there was some other problem while processing
*/
void processModifications(@Nonnull DataObjectUpdates updates,
@Nonnull WriteContext ctx) throws TranslationException;
/**
* Indicates direct support for update operation on provided type
*
* @param type data object type
*/
boolean writerSupportsUpdate(@Nonnull InstanceIdentifier<?> type);
/**
* Simple DTO containing updates for {@link WriterRegistry}. Currently only deletes and updates (create + update)
* are distinguished.
*/
@Beta
final class DataObjectUpdates {
private final Multimap<InstanceIdentifier<?>, DataObjectUpdate> updates;
private final Multimap<InstanceIdentifier<?>, DataObjectUpdate.DataObjectDelete> deletes;
/**
* Create new instance.
*
* @param updates All updates indexed by their unkeyed {@link InstanceIdentifier}
* @param deletes All deletes indexed by their unkeyed {@link InstanceIdentifier}
*/
public DataObjectUpdates(@Nonnull final Multimap<InstanceIdentifier<?>, DataObjectUpdate> updates,
@Nonnull final Multimap<InstanceIdentifier<?>, DataObjectUpdate.DataObjectDelete> deletes) {
this.deletes = deletes;
this.updates = updates;
}
public Multimap<InstanceIdentifier<?>, DataObjectUpdate> getUpdates() {
return updates;
}
public Multimap<InstanceIdentifier<?>, DataObjectUpdate.DataObjectDelete> getDeletes() {
return deletes;
}
public boolean isEmpty() {
return updates.isEmpty() && deletes.isEmpty();
}
@Override
public String toString() {
return "DataObjectUpdates{" + "updates=" + updates + ", deletes=" + deletes + '}';
}
/**
* Get a {@link Set} containing all update types from both updates as well as deletes.
*/
public Set<InstanceIdentifier<?>> getTypeIntersection() {
return Sets.union(deletes.keySet(), updates.keySet());
}
public Set<DataObjectUpdate> getAllModifications() {
return Stream.concat(updates.values().stream(), deletes.values().stream())
.collect(Collectors.toSet());
}
/**
* Check whether there is only a single type of data object to be updated.
*
* @return true if there is only a single type of updates (update + delete)
*/
public boolean containsOnlySingleType() {
return getTypeIntersection().size() == 1;
}
@Override
public boolean equals(final Object other) {
if (this == other) {
return true;
}
if (other == null || getClass() != other.getClass()) {
return false;
}
final DataObjectUpdates that = (DataObjectUpdates) other;
if (!updates.equals(that.updates)) {
return false;
}
return deletes.equals(that.deletes);
}
@Override
public int hashCode() {
int result = updates.hashCode();
result = 31 * result + deletes.hashCode();
return result;
}
}
}
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