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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.v3po.util;
import com.google.common.collect.Lists;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import javax.annotation.Nonnull;
import javax.annotation.concurrent.ThreadSafe;
import org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.naming.context.rev160513.Contexts;
import org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.naming.context.rev160513.contexts.naming.context.Mappings;
import org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.naming.context.rev160513.contexts.naming.context.mappings.Mapping;
import org.opendaylight.yangtools.yang.common.QName;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
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.DataTreeModification;
import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeSnapshot;
import org.opendaylight.yangtools.yang.data.api.schema.tree.DataValidationFailedException;
import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNodes;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Naming context keeping a mapping between int index and string name.
* Provides artificial names to unknown indices.
*/
@ThreadSafe
public class DataTreeNamingContext extends NamingContext {
// FIXME this has to be accessed by readers/writers in a transactional manner and the transaction will only be committed once
// the Read or Write operation finishes successfully
// Context datatree has to become a first class citizen of Honeycomb, and Honeycomb needs to create and provide
// context read write transaction as part of context to read/write customizers
// This will then become just a utility writer relying on transaction provided by the infrastructure
// Btw. the context transaction needs to disable commit/submit when being passed to customizers
private static final Logger LOG = LoggerFactory.getLogger(DataTreeNamingContext.class);
private static final QName NAME_KEY_QNAME = QName.create(Contexts.QNAME, "name");
private static final QName INDEX_QNAME = QName.create(Contexts.QNAME, "index");
private final String instanceName;
private final DataTree contextDataTree;
private final YangInstanceIdentifier.NodeIdentifierWithPredicates namingContextNodeId;
private final YangInstanceIdentifier namingContextIid;
public DataTreeNamingContext(final String artificialNamePrefix, final String instanceName,
final DataTree contextDataTree) {
super(artificialNamePrefix);
this.instanceName = instanceName;
this.contextDataTree = contextDataTree;
namingContextNodeId = getNodeId(
org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.naming.context.rev160513.contexts.NamingContext.QNAME,
Collections.singletonMap(NAME_KEY_QNAME, instanceName));
namingContextIid = YangInstanceIdentifier.create(
getNodeId(Contexts.QNAME),
getNodeId(org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.naming.context.rev160513.contexts.NamingContext.QNAME),
namingContextNodeId);
// FIXME read current mappings and initialize map
mergeNewContextInDataTree(instanceName);
}
// TODO move the data tree aspect into a dedicated class
private void mergeNewContextInDataTree(final String instanceName) {
final DataTreeModification dataTreeModification = getModification();
final YangInstanceIdentifier.NodeIdentifier namingContextsNodeIdForMapNode = getNodeId(
org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.naming.context.rev160513.contexts.NamingContext.QNAME);
final ContainerNode newMapping = Builders.containerBuilder()
.withNodeIdentifier(getNodeId(Contexts.QNAME))
.withChild(Builders.mapBuilder()
.withNodeIdentifier(namingContextsNodeIdForMapNode)
.withChild(Builders.mapEntryBuilder()
.withNodeIdentifier(namingContextNodeId)
.withChild(ImmutableNodes.leafNode(NAME_KEY_QNAME, instanceName))
.withChild(Builders.containerBuilder()
.withNodeIdentifier(getNodeId(Mappings.QNAME))
.withChild(Builders.mapBuilder()
.withNodeIdentifier(getNodeId(Mapping.QNAME))
.build())
.build())
.build())
.build())
.build();
// FIXME add logs or debug to resolve:
// 2016-05-13 15:48:52,401 | WARN | config-pusher | DataTreeNamingContext | 240 - io.fd.honeycomb.v3po.vpp-translate-utils - 1.0.0.SNAPSHOT | Unable to update context: interface-context in context data tree
// org.opendaylight.yangtools.yang.data.api.schema.tree.ModifiedNodeDoesNotExistException: Node /(urn:honeycomb:params:xml:ns:yang:naming:context?revision=2016-05-13)contexts/naming-context/naming-context[{(urn:honeycomb:params:xml:ns:yang:naming:context?revision=2016-05-13)name=interface-context}] does not exist. Cannot apply modification to its children.
// at org.opendaylight.yangtools.yang.data.impl.schema.tree.AbstractNodeContainerModificationStrategy.checkTouchApplicable(AbstractNodeContainerModificationStrategy.java:276)[55:org.opendaylight.yangtools.yang-data-impl:0.8.0.Beryllium]
// FIXME looks like a timing issue, did not occur when debugging
dataTreeModification.merge(YangInstanceIdentifier.create(getNodeId(Contexts.QNAME)), newMapping);
commitModification(dataTreeModification);
}
private void commitModification(final DataTreeModification dataTreeModification) {
try {
dataTreeModification.ready();
contextDataTree.validate(dataTreeModification);
contextDataTree.commit(contextDataTree.prepare(dataTreeModification));
} catch (DataValidationFailedException e) {
LOG.warn("Unable to update context: {} in context data tree", instanceName, e);
throw new IllegalStateException("Unable to update context in context data tree", e);
}
}
private DataTreeModification getModification() {
final DataTreeSnapshot dataTreeSnapshot = contextDataTree.takeSnapshot();
return dataTreeSnapshot.newModification();
}
private static YangInstanceIdentifier.NodeIdentifierWithPredicates getNodeId(@Nonnull final QName qName,
@Nonnull final Map<QName, Object> keys) {
return new YangInstanceIdentifier.NodeIdentifierWithPredicates(qName, keys);
}
private static YangInstanceIdentifier.NodeIdentifier getNodeId(@Nonnull final QName qName) {
return new YangInstanceIdentifier.NodeIdentifier(qName);
}
public synchronized void addName(final int index, final String name) {
addMappingToDataTree(name, index);
super.addName(index, name);
}
private void addMappingToDataTree(final String name, final int index) {
final DataTreeModification dataTreeModification = getModification();
final YangInstanceIdentifier.NodeIdentifierWithPredicates mappingNodeId = getNodeId(Mapping.QNAME,
Collections.singletonMap(NAME_KEY_QNAME, name));
final List<YangInstanceIdentifier.PathArgument> pathArguments = namingContextIid.getPathArguments();
final ArrayList<YangInstanceIdentifier.PathArgument> newPathArgs = Lists.newArrayList(pathArguments);
newPathArgs.add(getNodeId(Mappings.QNAME));
newPathArgs.add(getNodeId(Mapping.QNAME));
newPathArgs.add(mappingNodeId);
final YangInstanceIdentifier identifier = YangInstanceIdentifier.create(newPathArgs);
final NormalizedNode<?, ?> newMapping = Builders.mapEntryBuilder()
.withNodeIdentifier(mappingNodeId)
.withChild(ImmutableNodes.leafNode(NAME_KEY_QNAME, name))
.withChild(ImmutableNodes.leafNode(INDEX_QNAME, index))
.build();
dataTreeModification.write(identifier, newMapping);
commitModification(dataTreeModification);
}
public synchronized int removeName(@Nonnull final String name) {
removeMappingFromDataTree(name);
return super.removeName(name);
}
private void removeMappingFromDataTree(final String name) {
final DataTreeModification dataTreeModification = getModification();
final YangInstanceIdentifier.NodeIdentifierWithPredicates mappingNodeId = getNodeId(Mapping.QNAME,
Collections.singletonMap(NAME_KEY_QNAME, name));
final YangInstanceIdentifier identifier = YangInstanceIdentifier.create(
namingContextIid.getLastPathArgument(), getNodeId(Mappings.QNAME), getNodeId(Mapping.QNAME), mappingNodeId);
dataTreeModification.delete(identifier);
commitModification(dataTreeModification);
}
}
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