2 * Copyright (c) 2013 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.bgpcep.pcep.topology.provider;
10 import static com.google.common.base.Preconditions.checkArgument;
12 import com.google.common.util.concurrent.FluentFuture;
13 import com.google.common.util.concurrent.FutureCallback;
14 import com.google.common.util.concurrent.MoreExecutors;
15 import java.util.Collection;
16 import java.util.HashMap;
18 import java.util.Optional;
19 import java.util.concurrent.ExecutionException;
20 import org.checkerframework.checker.lock.qual.GuardedBy;
21 import org.checkerframework.checker.lock.qual.Holding;
22 import org.eclipse.jdt.annotation.NonNull;
23 import org.opendaylight.mdsal.binding.api.DataBroker;
24 import org.opendaylight.mdsal.binding.api.ReadTransaction;
25 import org.opendaylight.mdsal.binding.api.Transaction;
26 import org.opendaylight.mdsal.binding.api.TransactionChain;
27 import org.opendaylight.mdsal.binding.api.TransactionChainListener;
28 import org.opendaylight.mdsal.binding.api.WriteTransaction;
29 import org.opendaylight.mdsal.common.api.CommitInfo;
30 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev220730.Node1;
32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev220730.lsp.metadata.Metadata;
33 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NodeId;
34 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology;
35 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
36 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.NodeBuilder;
37 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.NodeKey;
38 import org.opendaylight.yangtools.yang.binding.DataObject;
39 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
40 import org.opendaylight.yangtools.yang.binding.KeyedInstanceIdentifier;
41 import org.slf4j.Logger;
42 import org.slf4j.LoggerFactory;
44 // This class is thread-safe
45 final class TopologyNodeState implements TransactionChainListener {
46 private static final Logger LOG = LoggerFactory.getLogger(TopologyNodeState.class);
48 private final Map<String, Metadata> metadata = new HashMap<>();
49 private final KeyedInstanceIdentifier<Node, NodeKey> nodeId;
50 private final TransactionChain chain;
51 private final long holdStateNanos;
52 private long lastReleased = 0;
53 //cache initial node state, if any node was persisted
55 private Node initialNodeState = null;
57 TopologyNodeState(final DataBroker broker, final InstanceIdentifier<Topology> topology, final NodeId id,
58 final long holdStateNanos) {
59 checkArgument(holdStateNanos >= 0);
60 nodeId = topology.child(Node.class, new NodeKey(id));
61 this.holdStateNanos = holdStateNanos;
62 chain = broker.createMergingTransactionChain(this);
65 @NonNull KeyedInstanceIdentifier<Node, NodeKey> getNodeId() {
69 synchronized Metadata getLspMetadata(final String name) {
70 return metadata.get(name);
73 synchronized void setLspMetadata(final String name, final Metadata value) {
75 metadata.remove(name);
77 metadata.put(name, value);
81 synchronized void cleanupExcept(final Collection<String> values) {
82 metadata.keySet().removeIf(s -> !values.contains(s));
85 synchronized void released(final boolean persist) {
86 // The session went down. Undo all the Topology changes we have done.
87 // We might want to persist topology node for later re-use.
89 final WriteTransaction trans = chain.newWriteOnlyTransaction();
90 trans.delete(LogicalDatastoreType.OPERATIONAL, nodeId);
91 trans.commit().addCallback(new FutureCallback<CommitInfo>() {
93 public void onSuccess(final CommitInfo result) {
94 LOG.trace("Internal state for node {} cleaned up successfully", nodeId);
98 public void onFailure(final Throwable throwable) {
99 LOG.error("Failed to cleanup internal state for session {}", nodeId, throwable);
101 }, MoreExecutors.directExecutor());
105 lastReleased = System.nanoTime();
108 synchronized void taken(final boolean retrieveNode) {
109 final long now = System.nanoTime();
111 if (now - lastReleased > holdStateNanos) {
115 //try to get the topology's node
118 // FIXME: we really should not be performing synchronous operations
119 final Optional<Node> prevNode = readOperationalData(nodeId).get();
120 if (prevNode.isEmpty()) {
123 //cache retrieved node
124 initialNodeState = prevNode.orElseThrow();
126 } catch (final ExecutionException | InterruptedException throwable) {
127 LOG.error("Failed to get topology node {}", nodeId, throwable);
134 synchronized Node getInitialNodeState() {
135 return initialNodeState;
138 synchronized TransactionChain getChain() {
142 synchronized <T extends DataObject> FluentFuture<Optional<T>> readOperationalData(
143 final InstanceIdentifier<T> id) {
144 try (ReadTransaction t = chain.newReadOnlyTransaction()) {
145 return t.read(LogicalDatastoreType.OPERATIONAL, id);
150 public void onTransactionChainFailed(final TransactionChain pchain, final Transaction transaction,
151 final Throwable cause) {
152 // FIXME: flip internal state, so that the next attempt to update fails, triggering node reconnect
153 LOG.error("Unexpected transaction failure in node {} transaction {}", nodeId, transaction.getIdentifier(),
159 public void onTransactionChainSuccessful(final TransactionChain pchain) {
160 LOG.info("Node {} shutdown successfully", nodeId);
163 synchronized void close() {
168 private void putTopologyNode() {
169 final Node node = new NodeBuilder().withKey(nodeId.getKey()).build();
170 final WriteTransaction tx = chain.newWriteOnlyTransaction();
171 LOG.trace("Put topology Node {}, value {}", nodeId, node);
172 // FIXME: why is this a 'merge' and not a 'put'? This seems to be related to BGPCEP-739, but there is little
173 // evidence as to what exactly was being overwritten
174 tx.merge(LogicalDatastoreType.OPERATIONAL, nodeId, node);
175 tx.commit().addCallback(new FutureCallback<CommitInfo>() {
177 public void onSuccess(final CommitInfo result) {
178 LOG.trace("Topology Node stored {}, value {}", nodeId, node);
182 public void onFailure(final Throwable throwable) {
183 LOG.error("Put topology Node failed {}, value {}", nodeId, node, throwable);
185 }, MoreExecutors.directExecutor());
188 @NonNull FluentFuture<? extends @NonNull CommitInfo> storeNode(final InstanceIdentifier<Node1> topologyAugment,
190 LOG.trace("Peer data {} set to {}", topologyAugment, ta);
191 synchronized (this) {
192 final WriteTransaction trans = chain.newWriteOnlyTransaction();
193 trans.put(LogicalDatastoreType.OPERATIONAL, topologyAugment, ta);
194 // All set, commit the modifications
195 return trans.commit();