/**
* Copyright (c) 2014 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.frm.impl;
import com.google.common.base.Preconditions;
import java.util.Collection;
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.AsyncDataChangeEvent;
import org.opendaylight.openflowplugin.applications.frm.ForwardingRulesCommiter;
import org.opendaylight.openflowplugin.applications.frm.ForwardingRulesManager;
import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowCapableNode;
import org.opendaylight.yangtools.yang.binding.DataObject;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* AbstractChangeListner implemented basic {@link AsyncDataChangeEvent} processing for
* flow node subDataObject (flows, groups and meters).
*
* @author Vaclav Demcak
*
*/
public abstract class AbstractListeningCommiter implements ForwardingRulesCommiter {
private static final Logger LOG = LoggerFactory.getLogger(AbstractListeningCommiter.class);
ForwardingRulesManager provider;
private final Class clazz;
public AbstractListeningCommiter (ForwardingRulesManager provider, Class clazz) {
this.provider = Preconditions.checkNotNull(provider, "ForwardingRulesManager can not be null!");
this.clazz = Preconditions.checkNotNull(clazz, "Class can not be null!");
}
@Override
public void onDataTreeChanged(Collection> changes) {
Preconditions.checkNotNull(changes, "Changes may not be null!");
for (DataTreeModification change : changes) {
final InstanceIdentifier key = change.getRootPath().getRootIdentifier();
final DataObjectModification mod = change.getRootNode();
final InstanceIdentifier nodeIdent =
key.firstIdentifierOf(FlowCapableNode.class);
if (preConfigurationCheck(nodeIdent)) {
switch (mod.getModificationType()) {
case DELETE:
remove(key, mod.getDataBefore(), nodeIdent);
break;
case SUBTREE_MODIFIED:
update(key, mod.getDataBefore(), mod.getDataAfter(), nodeIdent);
break;
case WRITE:
if (mod.getDataBefore() == null) {
add(key, mod.getDataAfter(), nodeIdent);
} else {
update(key, mod.getDataBefore(), mod.getDataAfter(), nodeIdent);
}
break;
default:
throw new IllegalArgumentException("Unhandled modification type " + mod.getModificationType());
}
}
else{
if (provider.getConfiguration().isStaleMarkingEnabled()) {
LOG.info("Stale-Marking ENABLED and switch {} is NOT connected, storing stale entities",
nodeIdent.toString());
// Switch is NOT connected
switch (mod.getModificationType()) {
case DELETE:
createStaleMarkEntity(key, mod.getDataBefore(), nodeIdent);
break;
case SUBTREE_MODIFIED:
break;
case WRITE:
break;
default:
throw new IllegalArgumentException("Unhandled modification type " + mod.getModificationType());
}
}
}
}
}
/**
* Method return wildCardPath for Listener registration
* and for identify the correct KeyInstanceIdentifier from data;
*/
protected abstract InstanceIdentifier getWildCardPath();
private boolean preConfigurationCheck(final InstanceIdentifier nodeIdent) {
Preconditions.checkNotNull(nodeIdent, "FlowCapableNode ident can not be null!");
// In single node cluster, node should be in local cache before we get any flow/group/meter
// data change event from data store. So first check should pass.
// In case of 3-node cluster, when shard leader changes, clustering will send blob of data
// present in operational data store and config data store. So ideally local node cache
// should get populated. But to handle a scenario where flow request comes before the blob
// of config/operational data gets processes, it won't find node in local cache and it will
// skip the flow/group/meter operational. This requires an addition check, where it reads
// node from operational data store and if it's present it calls flowNodeConnected to explictly
// trigger the event of new node connected.
if(!provider.isNodeOwner(nodeIdent)) { return false; }
if (!provider.isNodeActive(nodeIdent)) {
if (provider.checkNodeInOperationalDataStore(nodeIdent)) {
provider.getFlowNodeReconciliation().flowNodeConnected(nodeIdent);
return true;
} else {
return false;
}
}
return true;
}
}