/*
* 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.groupbasedpolicy.sxp.ep.provider.impl.listen;
import com.google.common.base.Optional;
import com.google.common.base.Preconditions;
import com.google.common.util.concurrent.AsyncFunction;
import com.google.common.util.concurrent.FutureCallback;
import com.google.common.util.concurrent.Futures;
import com.google.common.util.concurrent.ListenableFuture;
import java.util.Collection;
import javax.annotation.Nonnull;
import org.opendaylight.controller.md.sal.binding.api.DataBroker;
import org.opendaylight.controller.md.sal.binding.api.ClusteredDataTreeChangeListener;
import org.opendaylight.controller.md.sal.binding.api.DataTreeIdentifier;
import org.opendaylight.controller.md.sal.binding.api.DataTreeModification;
import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
import org.opendaylight.groupbasedpolicy.sxp.ep.provider.impl.DSAsyncDao;
import org.opendaylight.groupbasedpolicy.sxp.ep.provider.impl.MasterDatabaseBindingListener;
import org.opendaylight.groupbasedpolicy.sxp.ep.provider.impl.SimpleCachedDao;
import org.opendaylight.groupbasedpolicy.sxp.ep.provider.impl.SxpMapperReactor;
import org.opendaylight.groupbasedpolicy.sxp.ep.provider.impl.util.EPTemplateUtil;
import org.opendaylight.groupbasedpolicy.sxp.ep.provider.impl.util.L3EPServiceUtil;
import org.opendaylight.groupbasedpolicy.sxp.ep.provider.impl.util.SxpListenerUtil;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpPrefix;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.config.groupbasedpolicy.sxp.integration.sxp.ep.provider.model.rev160302.sxp.ep.mapper.EndpointForwardingTemplateBySubnet;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.config.groupbasedpolicy.sxp.integration.sxp.ep.provider.model.rev160302.sxp.ep.mapper.EndpointPolicyTemplateBySgt;
import org.opendaylight.yang.gen.v1.urn.opendaylight.sxp.database.rev160308.Sgt;
import org.opendaylight.yang.gen.v1.urn.opendaylight.sxp.database.rev160308.master.database.fields.MasterDatabaseBinding;
import org.opendaylight.yang.gen.v1.urn.opendaylight.sxp.node.rev160308.SxpNodeIdentity;
import org.opendaylight.yang.gen.v1.urn.opendaylight.sxp.node.rev160308.network.topology.topology.node.SxpDomains;
import org.opendaylight.yang.gen.v1.urn.opendaylight.sxp.node.rev160308.network.topology.topology.node.sxp.domains.SxpDomain;
import org.opendaylight.yang.gen.v1.urn.opendaylight.sxp.node.rev160308.sxp.databases.fields.MasterDatabase;
import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
import org.opendaylight.yangtools.concepts.ListenerRegistration;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
import org.opendaylight.yangtools.yang.common.RpcError;
import org.opendaylight.yangtools.yang.common.RpcResult;
import org.opendaylight.yangtools.yang.common.RpcResultBuilder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* listens to sxp master database and propagates change events for further processing
*/
public class MasterDatabaseBindingListenerImpl implements MasterDatabaseBindingListener {
private static final Logger LOG = LoggerFactory.getLogger(MasterDatabaseBindingListenerImpl.class);
private static final FutureCallback<RpcResult<Void>> RPC_POLICY_RESULT_FUTURE_CALLBACK =
L3EPServiceUtil.createFailureLoggingCallback("failed to read epPolicyTemplate");
public static final FutureCallback<RpcResult<Void>> RPC_FW_RESULT_FUTURE_CALLBACK =
L3EPServiceUtil.createFailureLoggingCallback("failed to read epForwardingTemplate");
private final SxpMapperReactor sxpMapperReactor;
private final SimpleCachedDao<IpPrefix, MasterDatabaseBinding> masterDBBindingDaoCached;
private final DSAsyncDao<Sgt, EndpointPolicyTemplateBySgt> epPolicyTemplateDao;
private final DSAsyncDao<IpPrefix, EndpointForwardingTemplateBySubnet> epForwardingTemplateDao;
private final ListenerRegistration<? extends ClusteredDataTreeChangeListener> listenerRegistration;
private final InstanceIdentifier<MasterDatabaseBinding> sxpDbPath;
public MasterDatabaseBindingListenerImpl(final DataBroker dataBroker,
final SxpMapperReactor sxpMapperReactor,
final SimpleCachedDao<IpPrefix, MasterDatabaseBinding> masterDBBindingDaoCached,
final DSAsyncDao<Sgt, EndpointPolicyTemplateBySgt> epPolicyTemplateDao,
final DSAsyncDao<IpPrefix, EndpointForwardingTemplateBySubnet> epForwardingTemplateDao) {
this.sxpMapperReactor = Preconditions.checkNotNull(sxpMapperReactor);
this.masterDBBindingDaoCached = Preconditions.checkNotNull(masterDBBindingDaoCached);
this.epPolicyTemplateDao = Preconditions.checkNotNull(epPolicyTemplateDao);
this.epForwardingTemplateDao = Preconditions.checkNotNull(epForwardingTemplateDao);
//TODO: get exact sxp-node path from config (pointing to ise listener).. start listening later - when config appears
sxpDbPath = MasterDatabaseBindingListener.SXP_TOPOLOGY_PATH
.child(Node.class)
.augmentation(SxpNodeIdentity.class)
.child(SxpDomains.class)
.child(SxpDomain.class)
.child(MasterDatabase.class)
.child(MasterDatabaseBinding.class);
final DataTreeIdentifier<MasterDatabaseBinding> dataTreeIdentifier = new DataTreeIdentifier<>(
LogicalDatastoreType.OPERATIONAL, sxpDbPath);
listenerRegistration = dataBroker.registerDataTreeChangeListener(dataTreeIdentifier, this);
LOG.debug("started listening to {}", sxpDbPath);
}
@Override
public void onDataTreeChanged(@Nonnull final Collection<DataTreeModification<MasterDatabaseBinding>> collection) {
for (DataTreeModification<MasterDatabaseBinding> change : collection) {
LOG.trace("received modification: {} -> {}", change.getRootPath(), change.getRootNode().getModificationType());
// update cached dao
final MasterDatabaseBinding sxpMasterDBItem = change.getRootNode().getDataAfter();
if (sxpMasterDBItem == null) {
//TODO: cover sgt-ip mapping removal
LOG.debug("ip-sgt mapping was removed - NOOP: {}",
change.getRootPath().getRootIdentifier().firstKeyOf(MasterDatabaseBinding.class));
} else {
final IpPrefix ipPrefixKey = sxpMasterDBItem.getIpPrefix();
SxpListenerUtil.updateCachedDao(masterDBBindingDaoCached, ipPrefixKey, change);
processWithEPTemplates(sxpMasterDBItem);
}
}
}
private void processWithEPTemplates(final MasterDatabaseBinding sxpMasterDBItem) {
final ListenableFuture<Optional<EndpointPolicyTemplateBySgt>> epPolicyTemplateFuture =
epPolicyTemplateDao.read(sxpMasterDBItem.getSecurityGroupTag());
final ListenableFuture<Optional<EndpointForwardingTemplateBySubnet>> epForwardingTemplateFuture =
epForwardingTemplateDao.read(sxpMasterDBItem.getIpPrefix());
final ListenableFuture<EPTemplateUtil.OptionalMutablePair<EndpointPolicyTemplateBySgt, EndpointForwardingTemplateBySubnet>> compositeRead
= EPTemplateUtil.compositeRead(epPolicyTemplateFuture, epForwardingTemplateFuture);
final ListenableFuture<RpcResult<Void>> rpcResult = Futures.transform(compositeRead,
new AsyncFunction<EPTemplateUtil.OptionalMutablePair<EndpointPolicyTemplateBySgt, EndpointForwardingTemplateBySubnet>, RpcResult<Void>>() {
@Override
public ListenableFuture<RpcResult<Void>> apply(final EPTemplateUtil.OptionalMutablePair<EndpointPolicyTemplateBySgt, EndpointForwardingTemplateBySubnet> input) throws Exception {
final ListenableFuture<RpcResult<Void>> result;
if (input == null) {
LOG.debug("no ep*Templates available for sgt/ip-prefix: {}/{}",
sxpMasterDBItem.getSecurityGroupTag(),
sxpMasterDBItem.getIpPrefix());
result = RpcResultBuilder.<Void>failed()
.withError(RpcError.ErrorType.APPLICATION,
"no ep-templates available for" + sxpMasterDBItem)
.buildFuture();
} else if (!input.getLeft().isPresent()) {
LOG.debug("no epPolicyTemplate available for sgt: {}", sxpMasterDBItem.getSecurityGroupTag());
result = RpcResultBuilder.<Void>failed()
.withError(RpcError.ErrorType.APPLICATION,
"no epPolicyTemplate available for " + sxpMasterDBItem)
.buildFuture();
} else if (!input.getRight().isPresent()) {
LOG.debug("no epForwardingTemplate available for ip-prefix: {}",
sxpMasterDBItem.getIpPrefix());
result = RpcResultBuilder.<Void>failed()
.withError(RpcError.ErrorType.APPLICATION,
"no epForwardingTemplate available for " + sxpMasterDBItem)
.buildFuture();
} else {
LOG.trace("processing sxpMasterDB event and epPolicyTemplate for sgt/ip-prefix: {}/{}",
sxpMasterDBItem.getSecurityGroupTag(),
sxpMasterDBItem.getIpPrefix());
result = sxpMapperReactor.processTemplatesAndSxpMasterDB(input.getLeft().get(),
input.getRight().get(), sxpMasterDBItem);
}
return result;
}
});
Futures.addCallback(rpcResult, RPC_POLICY_RESULT_FUTURE_CALLBACK);
}
@Override
public void close() throws Exception {
LOG.debug("closing listener registration to {}", sxpDbPath);
listenerRegistration.close();
}
}