/**
* Copyright (c) 2016 Cisco Systems, Inc. and others. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 which accompanies this distribution,
* and is available at http://www.eclipse.org/legal/epl-v10.html
*/
package org.opendaylight.openflowplugin.applications.frsync.impl;
import com.google.common.base.Optional;
import com.google.common.util.concurrent.ListenableFuture;
import java.util.Collection;
import javax.annotation.Nonnull;
import org.opendaylight.controller.md.sal.binding.api.DataObjectModification;
import org.opendaylight.controller.md.sal.binding.api.DataTreeModification;
import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
import org.opendaylight.openflowplugin.applications.frsync.SyncReactor;
import org.opendaylight.openflowplugin.applications.frsync.dao.FlowCapableNodeDao;
import org.opendaylight.openflowplugin.applications.frsync.dao.FlowCapableNodeSnapshotDao;
import org.opendaylight.openflowplugin.applications.frsync.util.PathUtil;
import org.opendaylight.openflowplugin.applications.frsync.util.SyncupEntry;
import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowCapableNode;
import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeId;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Listens to config changes and delegates sync entry to {@link SyncReactor}.
*/
public class SimplifiedConfigListener extends AbstractFrmSyncListener<FlowCapableNode> {
private static final Logger LOG = LoggerFactory.getLogger(SimplifiedConfigListener.class);
private final SyncReactor reactor;
private final FlowCapableNodeSnapshotDao configSnapshot;
private final FlowCapableNodeDao operationalDao;
public SimplifiedConfigListener(final SyncReactor reactor,
final FlowCapableNodeSnapshotDao configSnapshot,
final FlowCapableNodeDao operationalDao) {
this.reactor = reactor;
this.configSnapshot = configSnapshot;
this.operationalDao = operationalDao;
}
@Override
public void onDataTreeChanged(@Nonnull final Collection<DataTreeModification<FlowCapableNode>> modifications) {
super.onDataTreeChanged(modifications);
}
/**
* Update cache. If operational data are present, choose appropriate data and start syncup.
* Otherwise skip incoming change.
*/
protected Optional<ListenableFuture<Boolean>> processNodeModification(
final DataTreeModification<FlowCapableNode> modification) {
final InstanceIdentifier<FlowCapableNode> nodePath = modification.getRootPath().getRootIdentifier();
final NodeId nodeId = PathUtil.digNodeId(nodePath);
configSnapshot.updateCache(nodeId, Optional.fromNullable(modification.getRootNode().getDataAfter()));
final Optional<FlowCapableNode> operationalNode = operationalDao.loadByNodeId(nodeId);
if (!operationalNode.isPresent()) {
LOG.debug("Skip syncup, {} operational is not present", nodeId.getValue());
return Optional.absent();
}
final DataObjectModification<FlowCapableNode> configModification = modification.getRootNode();
final FlowCapableNode dataBefore = configModification.getDataBefore();
final FlowCapableNode dataAfter = configModification.getDataAfter();
final ListenableFuture<Boolean> endResult;
if (dataBefore == null && dataAfter != null) {
endResult = onNodeAdded(nodePath, dataAfter, operationalNode.get());
} else if (dataBefore != null && dataAfter == null) {
endResult = onNodeDeleted(nodePath, dataBefore);
} else {
endResult = onNodeUpdated(nodePath, dataBefore, dataAfter);
}
return Optional.of(endResult);
}
/**
* If node was added to config DS and it is already present in operational DS (connected) diff between current
* new configuration and actual configuration (seen in operational) should be calculated and sent to device.
*/
private ListenableFuture<Boolean> onNodeAdded(final InstanceIdentifier<FlowCapableNode> nodePath,
final FlowCapableNode dataAfter,
final FlowCapableNode operationalNode) {
LOG.debug("Reconciliation {}: {}", dsType(), PathUtil.digNodeId(nodePath).getValue());
final SyncupEntry syncupEntry = new SyncupEntry(dataAfter, dsType(), operationalNode, LogicalDatastoreType.OPERATIONAL);
return reactor.syncup(nodePath, syncupEntry);
}
/**
* Apply minimal changes very fast. For better performance needed just compare config
* after+before. Config listener should not be dependent on operational flows/groups/meters while
* updating config because operational store is highly async and it depends on another module in
* system which is updating operational store (that components is also trying to solve
* scale/performance issues on several layers).
*/
private ListenableFuture<Boolean> onNodeUpdated(final InstanceIdentifier<FlowCapableNode> nodePath,
final FlowCapableNode dataBefore,
final FlowCapableNode dataAfter) {
final SyncupEntry syncupEntry = new SyncupEntry(dataAfter, dsType(), dataBefore, dsType());
return reactor.syncup(nodePath, syncupEntry);
}
/**
* Remove values that are being deleted in the config from the switch.
* Note, this could be probably optimized using dedicated wipe-out RPC.
*/
private ListenableFuture<Boolean> onNodeDeleted(final InstanceIdentifier<FlowCapableNode> nodePath,
final FlowCapableNode dataBefore) {
final SyncupEntry syncupEntry = new SyncupEntry(null, dsType(), dataBefore, dsType());
return reactor.syncup(nodePath, syncupEntry);
}
@Override
public LogicalDatastoreType dsType() {
return LogicalDatastoreType.CONFIGURATION;
}
}