*/
package org.opendaylight.bgpcep.bgp.topology.provider;
-import java.util.ArrayList;
-
-import org.opendaylight.controller.md.sal.common.api.data.DataModification;
-import org.opendaylight.controller.sal.binding.api.data.DataProviderService;
+import com.google.common.base.Optional;
+import com.google.common.base.Preconditions;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.concurrent.ExecutionException;
+import org.opendaylight.controller.md.sal.binding.api.DataBroker;
+import org.opendaylight.controller.md.sal.binding.api.ReadTransaction;
+import org.opendaylight.controller.md.sal.binding.api.ReadWriteTransaction;
+import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
import org.opendaylight.protocol.bgp.rib.RibReference;
-import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.IpPrefix;
+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.bgp.message.rev130919.path.attributes.Attributes;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.Route;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.route.Attributes;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.next.hop.CNextHop;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.next.hop.c.next.hop.Ipv4NextHopCase;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.next.hop.c.next.hop.Ipv6NextHopCase;
import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NodeId;
import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.TopologyId;
import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.NodeBuilder;
import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.NodeKey;
-import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.TopologyTypesBuilder;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.TopologyTypes;
import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.nt.l3.unicast.igp.topology.rev131021.Node1;
import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.nt.l3.unicast.igp.topology.rev131021.Node1Builder;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.nt.l3.unicast.igp.topology.rev131021.igp.node.attributes.IgpNodeAttributes;
import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.nt.l3.unicast.igp.topology.rev131021.igp.node.attributes.IgpNodeAttributesBuilder;
import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.nt.l3.unicast.igp.topology.rev131021.igp.node.attributes.igp.node.attributes.Prefix;
import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.nt.l3.unicast.igp.topology.rev131021.igp.node.attributes.igp.node.attributes.PrefixBuilder;
import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.nt.l3.unicast.igp.topology.rev131021.igp.node.attributes.igp.node.attributes.PrefixKey;
import org.opendaylight.yangtools.yang.binding.DataObject;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.opendaylight.yangtools.yang.binding.KeyedInstanceIdentifier;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
*
*/
abstract class AbstractReachabilityTopologyBuilder<T extends Route> extends AbstractTopologyBuilder<T> {
- private static final Logger LOG = LoggerFactory.getLogger(AbstractReachabilityTopologyBuilder.class);
-
- protected AbstractReachabilityTopologyBuilder(final DataProviderService dataProvider, final RibReference locRibReference, final TopologyId topologyId,
- final Class<T> idClass) {
- super(dataProvider, locRibReference, topologyId, new TopologyTypesBuilder().build(), idClass);
- }
-
- private NodeId advertizingNode(final Attributes attrs) {
- final CNextHop nh = attrs.getCNextHop();
- if (nh instanceof Ipv4NextHopCase) {
- final Ipv4NextHop ipv4 = ((Ipv4NextHopCase) nh).getIpv4NextHop();
-
- return new NodeId(ipv4.getGlobal().getValue());
- } else if (nh instanceof Ipv6NextHopCase) {
- final Ipv6NextHop ipv6 = ((Ipv6NextHopCase) nh).getIpv6NextHop();
-
- return new NodeId(ipv6.getGlobal().getValue());
- } else {
- LOG.warn("Unhandled next hop class {}", nh.getImplementedInterface());
- return null;
- }
- }
-
- private InstanceIdentifier<Node1> nodeInstanceId(final NodeId ni) {
- return InstanceIdentifier.builder(getInstanceIdentifier()).child(Node.class, new NodeKey(ni)).augmentation(Node1.class).toInstance();
- }
-
- private InstanceIdentifier<Node1> ensureNodePresent(final DataModification<InstanceIdentifier<?>, DataObject> trans, final NodeId ni) {
- final InstanceIdentifier<Node1> nii = nodeInstanceId(ni);
- LOG.debug("Looking for pre-existing node at {}", nii);
-
- if (trans.readOperationalData(nii) == null) {
- LOG.debug("Create a new node at {}", nii);
- trans.putOperationalData(
- nii,
- new Node1Builder().setIgpNodeAttributes(new IgpNodeAttributesBuilder().setPrefix(new ArrayList<Prefix>()).build()).build());
- }
-
- return nii;
- }
-
- private void removeEmptyNode(final DataModification<InstanceIdentifier<?>, DataObject> trans, final InstanceIdentifier<Node1> nii) {
- final Node1 node = (Node1) trans.readOperationalData(nii);
- if (node != null && node.getIgpNodeAttributes().getPrefix().isEmpty()) {
- trans.removeOperationalData(nii);
- }
- }
-
- protected abstract Attributes getAttributes(final T value);
-
- protected abstract IpPrefix getPrefix(final T value);
-
- @Override
- protected final void createObject(final DataModification<InstanceIdentifier<?>, DataObject> trans, final InstanceIdentifier<T> id,
- final T value) {
- final NodeId ni = advertizingNode(getAttributes(value));
- final InstanceIdentifier<Node1> nii = ensureNodePresent(trans, ni);
-
- final IpPrefix prefix = getPrefix(value);
- final PrefixKey pk = new PrefixKey(prefix);
-
- trans.putOperationalData(
- InstanceIdentifier.builder(nii).child(
- org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.nt.l3.unicast.igp.topology.rev131021.igp.node.attributes.IgpNodeAttributes.class).child(
- Prefix.class, pk).toInstance(), new PrefixBuilder().setKey(pk).setPrefix(prefix).build());
- }
-
- @Override
- protected final void removeObject(final DataModification<InstanceIdentifier<?>, DataObject> trans, final InstanceIdentifier<T> id,
- final T value) {
- final NodeId ni = advertizingNode(getAttributes(value));
- final InstanceIdentifier<Node1> nii = nodeInstanceId(ni);
-
- final IpPrefix prefix = getPrefix(value);
- final PrefixKey pk = new PrefixKey(prefix);
-
- trans.removeOperationalData(InstanceIdentifier.builder(nii).child(
- org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.nt.l3.unicast.igp.topology.rev131021.igp.node.attributes.IgpNodeAttributes.class).child(
- Prefix.class, pk).toInstance());
-
- removeEmptyNode(trans, nii);
- }
-
+ private static final Logger LOG = LoggerFactory.getLogger(AbstractReachabilityTopologyBuilder.class);
+ private final Map<NodeId, NodeUsage> nodes = new HashMap<>();
+
+ private static final class NodeUsage {
+ private final InstanceIdentifier<IgpNodeAttributes> attrId;
+ private int useCount = 1;
+
+ NodeUsage(final InstanceIdentifier<IgpNodeAttributes> attrId) {
+ this.attrId = Preconditions.checkNotNull(attrId);
+ }
+ }
+
+ protected AbstractReachabilityTopologyBuilder(final DataBroker dataProvider, final RibReference locRibReference,
+ final TopologyId topologyId, final TopologyTypes topologyTypes) {
+ super(dataProvider, locRibReference, topologyId, topologyTypes);
+ }
+
+ private NodeId advertizingNode(final Attributes attrs) {
+ final CNextHop nh = attrs.getCNextHop();
+ if (nh == null) {
+ LOG.warn("Next hop value is null");
+ return null;
+ } else if (nh instanceof Ipv4NextHopCase) {
+ final Ipv4NextHop ipv4 = ((Ipv4NextHopCase) nh).getIpv4NextHop();
+
+ return new NodeId(ipv4.getGlobal().getValue());
+ } else if (nh instanceof Ipv6NextHopCase) {
+ final Ipv6NextHop ipv6 = ((Ipv6NextHopCase) nh).getIpv6NextHop();
+
+ return new NodeId(ipv6.getGlobal().getValue());
+ } else {
+ LOG.warn("Unhandled next hop class {}", nh.getImplementedInterface());
+ return null;
+ }
+ }
+
+ private KeyedInstanceIdentifier<Node, NodeKey> nodeInstanceId(final NodeId ni) {
+ return getInstanceIdentifier().child(Node.class, new NodeKey(ni));
+ }
+
+ private static <T extends DataObject> T read(final ReadTransaction t, final InstanceIdentifier<T> id) {
+ final Optional<T> o;
+ try {
+ o = t.read(LogicalDatastoreType.OPERATIONAL, id).get();
+ } catch (InterruptedException | ExecutionException e) {
+ LOG.warn("Failed to read {}, assuming non-existent", id, e);
+ return null;
+ }
+
+ return o.orNull();
+ }
+
+ private InstanceIdentifier<IgpNodeAttributes> ensureNodePresent(final ReadWriteTransaction trans, final NodeId ni) {
+ final NodeUsage present = this.nodes.get(ni);
+ if (present != null) {
+ return present.attrId;
+ }
+
+ final KeyedInstanceIdentifier<Node, NodeKey> nii = nodeInstanceId(ni);
+ final InstanceIdentifier<IgpNodeAttributes> ret = nii.builder().augmentation(Node1.class).child(IgpNodeAttributes.class).build();
+
+ trans.merge(LogicalDatastoreType.OPERATIONAL, nii, new NodeBuilder().setKey(nii.getKey()).setNodeId(ni)
+ .addAugmentation(Node1.class, new Node1Builder().setIgpNodeAttributes(
+ new IgpNodeAttributesBuilder().setPrefix(Collections.<Prefix>emptyList()).build()).build()).build());
+
+ this.nodes.put(ni, new NodeUsage(ret));
+ return ret;
+ }
+
+ protected abstract Attributes getAttributes(final T value);
+
+ protected abstract IpPrefix getPrefix(final T value);
+
+ @Override
+ protected final void createObject(final ReadWriteTransaction trans, final InstanceIdentifier<T> id, final T value) {
+ final NodeId ni = advertizingNode(getAttributes(value));
+ if (ni == null) {
+ return;
+ }
+ final InstanceIdentifier<IgpNodeAttributes> nii = ensureNodePresent(trans, ni);
+
+ final IpPrefix prefix = getPrefix(value);
+ final PrefixKey pk = new PrefixKey(prefix);
+
+ trans.put(LogicalDatastoreType.OPERATIONAL,
+ nii.child(Prefix.class, pk), new PrefixBuilder().setKey(pk).setPrefix(prefix).build());
+ }
+
+ @Override
+ protected final void removeObject(final ReadWriteTransaction trans, final InstanceIdentifier<T> id, final T value) {
+ final NodeId ni = advertizingNode(getAttributes(value));
+ if (ni == null) {
+ return;
+ }
+ final NodeUsage present = this.nodes.get(ni);
+ Preconditions.checkState(present != null, "Removing prefix from non-existent node %s", present);
+
+ final PrefixKey pk = new PrefixKey(getPrefix(value));
+ trans.delete(LogicalDatastoreType.OPERATIONAL, present.attrId.child(Prefix.class, pk));
+
+ /*
+ * This is optimization magic: we are reading a list and we want to remove it once it
+ * hits zero. We may be in a transaction, so the read is costly, especially since we
+ * have just modified the list.
+ *
+ * Once we have performed the read, though, we can check the number of nodes, and reuse
+ * it for that number of removals. Note that since we do not track data and thus have
+ * no understanding about the difference between replace and add, we do not ever increase
+ * the life of this in createObject().
+ */
+ present.useCount--;
+ if (present.useCount == 0) {
+ final IgpNodeAttributes attrs = read(trans, present.attrId);
+ if (attrs != null) {
+ present.useCount = attrs.getPrefix().size();
+ if (present.useCount == 0) {
+ trans.delete(LogicalDatastoreType.OPERATIONAL, nodeInstanceId(ni));
+ this.nodes.remove(ni);
+ }
+ }
+ }
+ }
}
Code Review / bgpcep.git / blobdiff