*/
package org.opendaylight.bgpcep.pcep.topology.provider;
+import com.google.common.base.Optional;
+import com.google.common.base.Preconditions;
+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 java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
-
import javax.annotation.concurrent.ThreadSafe;
-
+import org.opendaylight.controller.md.sal.binding.api.BindingTransactionChain;
+import org.opendaylight.controller.md.sal.binding.api.DataBroker;
+import org.opendaylight.controller.md.sal.binding.api.ReadOnlyTransaction;
+import org.opendaylight.controller.md.sal.binding.api.ReadWriteTransaction;
+import org.opendaylight.controller.md.sal.binding.api.WriteTransaction;
+import org.opendaylight.controller.md.sal.common.api.data.AsyncTransaction;
+import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
+import org.opendaylight.controller.md.sal.common.api.data.TransactionChain;
+import org.opendaylight.controller.md.sal.common.api.data.TransactionChainListener;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev131024.lsp.metadata.Metadata;
import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NodeId;
-
-import com.google.common.base.Preconditions;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology;
+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.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;
@ThreadSafe
-final class TopologyNodeState {
- private final Map<String, Metadata> metadata = new HashMap<>();
- private final long holdStateNanos;
- private final NodeId nodeId;
- private long lastReleased = 0;
-
- public TopologyNodeState(final NodeId nodeId, final long holdStateNanos) {
- Preconditions.checkArgument(holdStateNanos >= 0);
- this.nodeId = Preconditions.checkNotNull(nodeId);
- this.holdStateNanos = holdStateNanos;
- }
-
- public NodeId getNodeId() {
- return nodeId;
- }
-
- public synchronized Metadata getLspMetadata(final String name) {
- return metadata.get(name);
- }
-
- public synchronized void setLspMetadata(final String name, final Metadata value) {
- if (value == null) {
- metadata.remove(name);
- } else {
- metadata.put(name, value);
- }
- }
-
- public synchronized void removeLspMetadata(final String name) {
- metadata.remove(name);
- }
-
- public synchronized void cleanupExcept(final Collection<String> values) {
- final Iterator<String> it = metadata.keySet().iterator();
- while (it.hasNext()) {
- if (!values.contains(it.next())) {
- it.remove();
- }
- }
- }
-
- public synchronized void released() {
- lastReleased = System.nanoTime();
- }
-
- public synchronized void taken() {
- final long now = System.nanoTime();
-
- if (now - lastReleased > holdStateNanos) {
- metadata.clear();
- }
- }
+final class TopologyNodeState implements AutoCloseable, TransactionChainListener {
+ private static final Logger LOG = LoggerFactory.getLogger(TopologyNodeState.class);
+ private final Map<String, Metadata> metadata = new HashMap<>();
+ private final KeyedInstanceIdentifier<Node, NodeKey> nodeId;
+ private final BindingTransactionChain chain;
+ private final long holdStateNanos;
+ private long lastReleased = 0;
+ //cache initial node state, if any node was persisted
+ private Node initialNodeState = null;
+
+ public TopologyNodeState(final DataBroker broker, final InstanceIdentifier<Topology> topology, final NodeId id, final long holdStateNanos) {
+ Preconditions.checkArgument(holdStateNanos >= 0);
+ this.nodeId = topology.child(Node.class, new NodeKey(id));
+ this.holdStateNanos = holdStateNanos;
+ this.chain = broker.createTransactionChain(this);
+ }
+
+ public KeyedInstanceIdentifier<Node, NodeKey> getNodeId() {
+ return nodeId;
+ }
+
+ public synchronized Metadata getLspMetadata(final String name) {
+ return metadata.get(name);
+ }
+
+ public synchronized void setLspMetadata(final String name, final Metadata value) {
+ if (value == null) {
+ metadata.remove(name);
+ } else {
+ metadata.put(name, value);
+ }
+ }
+
+ public synchronized void cleanupExcept(final Collection<String> values) {
+ final Iterator<String> it = metadata.keySet().iterator();
+ while (it.hasNext()) {
+ if (!values.contains(it.next())) {
+ it.remove();
+ }
+ }
+ }
+
+ public synchronized void released(final boolean persist) {
+ // The session went down. Undo all the Topology changes we have done.
+ // We might want to persist topology node for later re-use.
+ if (!persist) {
+ final WriteTransaction trans = beginTransaction();
+ trans.delete(LogicalDatastoreType.OPERATIONAL, this.nodeId);
+ Futures.addCallback(trans.submit(), new FutureCallback<Void>() {
+ @Override
+ public void onSuccess(final Void result) {
+ LOG.trace("Internal state for node {} cleaned up successfully", nodeId);
+ }
+
+ @Override
+ public void onFailure(final Throwable t) {
+ LOG.error("Failed to cleanup internal state for session {}", nodeId, t);
+ }
+ });
+ }
+
+ lastReleased = System.nanoTime();
+ }
+
+ public synchronized void taken(final boolean retrieveNode) {
+ final long now = System.nanoTime();
+
+ if (now - lastReleased > holdStateNanos) {
+ metadata.clear();
+ }
+
+ //try to get the topology's node
+ if (retrieveNode) {
+ Futures.addCallback(readOperationalData(nodeId), new FutureCallback<Optional<Node>>() {
+
+ @Override
+ public void onSuccess(final Optional<Node> result) {
+ if (!result.isPresent()) {
+ putTopologyNode();
+ } else {
+ //cache retrieved node
+ initialNodeState = result.get();
+ }
+ }
+
+ @Override
+ public void onFailure(final Throwable t) {
+ LOG.error("Failed to get topology node {}", nodeId, t);
+ }
+ });
+ } else {
+ putTopologyNode();
+ }
+ }
+
+ public synchronized Node getInitialNodeState() {
+ return initialNodeState;
+ }
+
+ WriteTransaction beginTransaction() {
+ return chain.newWriteOnlyTransaction();
+ }
+
+ ReadWriteTransaction rwTransaction() {
+ return chain.newReadWriteTransaction();
+ }
+
+ <T extends DataObject> ListenableFuture<Optional<T>> readOperationalData(final InstanceIdentifier<T> id) {
+ try (final ReadOnlyTransaction t = chain.newReadOnlyTransaction()) {
+ return t.read(LogicalDatastoreType.OPERATIONAL, id);
+ }
+ }
+
+ @Override
+ public void onTransactionChainFailed(final TransactionChain<?, ?> chain, final AsyncTransaction<?, ?> transaction, final Throwable cause) {
+ // FIXME: flip internal state, so that the next attempt to update fails, triggering node reconnect
+ LOG.error("Unexpected transaction failure in node {} transaction {}", nodeId, transaction.getIdentifier(), cause);
+ }
+
+ @Override
+ public void onTransactionChainSuccessful(final TransactionChain<?, ?> chain) {
+ LOG.info("Node {} shutdown successfully", nodeId);
+ }
+
+ @Override
+ public void close() {
+ chain.close();
+ }
+
+ private void putTopologyNode() {
+ final Node node = new NodeBuilder().setKey(nodeId.getKey()).setNodeId(nodeId.getKey().getNodeId()).build();
+ final WriteTransaction t = beginTransaction();
+ t.put(LogicalDatastoreType.OPERATIONAL, nodeId, node);
+ t.submit();
+ }
+
}
\ No newline at end of file
Code Review / bgpcep.git / blobdiff