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 java.util.Objects.requireNonNull;
12 import com.google.common.base.Optional;
13 import com.google.common.base.Preconditions;
14 import com.google.common.util.concurrent.FutureCallback;
15 import com.google.common.util.concurrent.Futures;
16 import com.google.common.util.concurrent.ListenableFuture;
17 import com.google.common.util.concurrent.MoreExecutors;
18 import io.netty.util.concurrent.FutureListener;
19 import java.net.InetAddress;
20 import java.util.ArrayList;
21 import java.util.Collection;
22 import java.util.HashMap;
23 import java.util.List;
25 import java.util.Map.Entry;
26 import java.util.Objects;
27 import java.util.Timer;
28 import java.util.TimerTask;
29 import java.util.concurrent.TimeUnit;
30 import java.util.concurrent.atomic.AtomicBoolean;
31 import javax.annotation.concurrent.GuardedBy;
32 import org.opendaylight.bgpcep.pcep.topology.provider.session.stats.SessionStateImpl;
33 import org.opendaylight.bgpcep.pcep.topology.provider.session.stats.TopologySessionStats;
34 import org.opendaylight.controller.md.sal.binding.api.ReadWriteTransaction;
35 import org.opendaylight.controller.md.sal.binding.api.WriteTransaction;
36 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
37 import org.opendaylight.protocol.pcep.PCEPCloseTermination;
38 import org.opendaylight.protocol.pcep.PCEPSession;
39 import org.opendaylight.protocol.pcep.PCEPTerminationReason;
40 import org.opendaylight.protocol.pcep.TerminationReason;
41 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddressBuilder;
42 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev171025.LspObject;
43 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev171025.Path1;
44 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev171025.lsp.object.Lsp;
45 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Message;
46 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.MessageHeader;
47 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Object;
48 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.ProtocolVersion;
49 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev171025.LspId;
50 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev171025.Node1;
51 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev171025.Node1Builder;
52 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev171025.OperationResult;
53 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev171025.PccSyncState;
54 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev171025.TearDownSessionInput;
55 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev171025.lsp.metadata.Metadata;
56 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev171025.pcep.client.attributes.PathComputationClient;
57 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev171025.pcep.client.attributes.PathComputationClientBuilder;
58 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev171025.pcep.client.attributes.path.computation.client.ReportedLsp;
59 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev171025.pcep.client.attributes.path.computation.client.ReportedLspBuilder;
60 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev171025.pcep.client.attributes.path.computation.client.ReportedLspKey;
61 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev171025.pcep.client.attributes.path.computation.client.reported.lsp.Path;
62 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
63 import org.opendaylight.yangtools.yang.binding.DataContainer;
64 import org.opendaylight.yangtools.yang.binding.DataObject;
65 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
66 import org.opendaylight.yangtools.yang.common.RpcResult;
67 import org.opendaylight.yangtools.yang.common.RpcResultBuilder;
68 import org.slf4j.Logger;
69 import org.slf4j.LoggerFactory;
72 * Base class for PCEP topology providers. It handles the common tasks involved in managing a PCEP server (PCE)
73 * endpoint, and exposing a network topology based on it. It needs to be subclassed to form a fully functional block,
74 * where the subclass provides handling of incoming messages.
76 * @param <S> identifier type of requests
77 * @param <L> identifier type for LSPs
79 public abstract class AbstractTopologySessionListener<S, L> implements TopologySessionListener, TopologySessionStats {
80 static final MessageHeader MESSAGE_HEADER = new MessageHeader() {
81 private final ProtocolVersion version = new ProtocolVersion((short) 1);
84 public Class<? extends DataContainer> getImplementedInterface() {
85 return MessageHeader.class;
89 public ProtocolVersion getVersion() {
93 static final String MISSING_XML_TAG = "Mandatory XML tags are missing.";
94 private static final Logger LOG = LoggerFactory.getLogger(AbstractTopologySessionListener.class);
96 final Map<L, String> lsps = new HashMap<>();
98 final SessionStateImpl listenerState;
100 private final Map<S, PCEPRequest> requests = new HashMap<>();
102 private final Map<String, ReportedLsp> lspData = new HashMap<>();
103 private final ServerSessionManager serverSessionManager;
104 private InstanceIdentifier<PathComputationClient> pccIdentifier;
105 private TopologyNodeState nodeState;
106 private AtomicBoolean synced = new AtomicBoolean(false);
107 private PCEPSession session;
108 private SyncOptimization syncOptimization;
109 private boolean triggeredResyncInProcess;
111 AbstractTopologySessionListener(final ServerSessionManager serverSessionManager) {
112 this.serverSessionManager = requireNonNull(serverSessionManager);
113 this.listenerState = new SessionStateImpl(this);
117 public final synchronized void onSessionUp(final PCEPSession session) {
119 * The session went up. Look up the router in Inventory model,
120 * create it if it is not there (marking that fact for later
121 * deletion), and mark it as synchronizing. Also create it in
122 * the topology model, with empty LSP list.
124 final InetAddress peerAddress = session.getRemoteAddress();
126 this.syncOptimization = new SyncOptimization(session);
128 final TopologyNodeState state = this.serverSessionManager.takeNodeState(peerAddress,
129 this, isLspDbRetreived());
131 // takeNodeState(..) may fail when the server session manager is being restarted due to configuration change
133 LOG.error("Unable to fetch topology node state for PCEP session. Closing session {}", session);
134 session.close(TerminationReason.UNKNOWN);
135 this.onSessionTerminated(session, new PCEPCloseTermination(TerminationReason.UNKNOWN));
139 if (this.session != null || this.nodeState != null) {
140 LOG.error("PCEP session is already up with {}. Closing session {}", session.getRemoteAddress(), session);
141 session.close(TerminationReason.UNKNOWN);
142 this.onSessionTerminated(session, new PCEPCloseTermination(TerminationReason.UNKNOWN));
145 this.session = session;
146 this.nodeState = state;
147 this.serverSessionManager.bind(this.nodeState.getNodeId(), this.listenerState);
149 LOG.trace("Peer {} resolved to topology node {}", peerAddress, state.getNodeId());
151 // Our augmentation in the topology node
152 final PathComputationClientBuilder pccBuilder = new PathComputationClientBuilder();
154 onSessionUp(session, pccBuilder);
155 this.synced.set(isSynchronized());
157 pccBuilder.setIpAddress(IpAddressBuilder.getDefaultInstance(peerAddress.getHostAddress()));
158 final InstanceIdentifier<Node1> topologyAugment = state.getNodeId().augmentation(Node1.class);
159 this.pccIdentifier = topologyAugment.child(PathComputationClient.class);
160 final Node initialNodeState = state.getInitialNodeState();
161 final boolean isNodePresent = isLspDbRetreived() && initialNodeState != null;
163 loadLspData(initialNodeState, this.lspData, this.lsps, isIncrementalSynchro());
164 pccBuilder.setReportedLsp(initialNodeState.getAugmentation(Node1.class)
165 .getPathComputationClient().getReportedLsp());
167 writeNode(pccBuilder, state, topologyAugment);
168 this.listenerState.init(session);
169 LOG.info("Session with {} attached to topology node {}", session.getRemoteAddress(), state.getNodeId());
172 private void writeNode(final PathComputationClientBuilder pccBuilder, final TopologyNodeState state,
173 final InstanceIdentifier<Node1> topologyAugment) {
174 final Node1 ta = new Node1Builder().setPathComputationClient(pccBuilder.build()).build();
176 final ReadWriteTransaction trans = state.rwTransaction();
177 trans.put(LogicalDatastoreType.OPERATIONAL, topologyAugment, ta);
178 LOG.trace("Peer data {} set to {}", topologyAugment, ta);
180 // All set, commit the modifications
181 Futures.addCallback(trans.submit(), new FutureCallback<Void>() {
183 public void onSuccess(final Void result) {
184 LOG.trace("Internal state for session {} updated successfully",
185 AbstractTopologySessionListener.this.session);
189 public void onFailure(final Throwable t) {
190 LOG.error("Failed to update internal state for session {}, terminating it",
191 AbstractTopologySessionListener.this.session, t);
192 AbstractTopologySessionListener.this.session.close(TerminationReason.UNKNOWN);
194 }, MoreExecutors.directExecutor());
197 void updatePccState(final PccSyncState pccSyncState) {
198 if (this.nodeState == null) {
199 LOG.info("Server Session Manager is closed.");
200 AbstractTopologySessionListener.this.session.close(TerminationReason.UNKNOWN);
203 final MessageContext ctx = new MessageContext(this.nodeState.beginTransaction());
204 updatePccNode(ctx, new PathComputationClientBuilder().setStateSync(pccSyncState).build());
205 if (pccSyncState != PccSyncState.Synchronized) {
206 this.synced.set(false);
207 this.triggeredResyncInProcess = true;
209 // All set, commit the modifications
210 Futures.addCallback(ctx.trans.submit(), new FutureCallback<Void>() {
212 public void onSuccess(final Void result) {
213 LOG.trace("Internal state for session {} updated successfully", AbstractTopologySessionListener.this.session);
217 public void onFailure(final Throwable t) {
218 LOG.error("Failed to update internal state for session {}", AbstractTopologySessionListener.this.session, t);
219 AbstractTopologySessionListener.this.session.close(TerminationReason.UNKNOWN);
221 }, MoreExecutors.directExecutor());
224 boolean isTriggeredSyncInProcess() {
225 return this.triggeredResyncInProcess;
229 * Tear down the given PCEP session. It's OK to call this method even after the session
230 * is already down. It always clear up the current session status.
235 private synchronized void tearDown(final PCEPSession session) {
237 requireNonNull(session);
238 this.serverSessionManager.releaseNodeState(this.nodeState, session, isLspDbPersisted());
239 if (this.nodeState != null) {
240 this.serverSessionManager.unbind(this.nodeState.getNodeId());
241 this.nodeState = null;
245 if (this.session != null) {
246 this.session.close();
249 } catch (final Exception e) {
250 LOG.error("Session {} cannot be closed.", session, e);
253 this.syncOptimization = null;
255 // Clear all requests we know about
256 for (final Entry<S, PCEPRequest> e : this.requests.entrySet()) {
257 final PCEPRequest r = e.getValue();
258 switch (r.getState()) {
260 // Done is done, nothing to do
261 LOG.trace("Request {} was done when session went down.", e.getKey());
264 // Peer has not acked: results in failure
265 LOG.info("Request {} was incomplete when session went down, failing the instruction", e.getKey());
266 r.done(OperationResults.NOACK);
269 // Peer has not been sent to the peer: results in cancellation
270 LOG.debug("Request {} was not sent when session went down, cancelling the instruction", e.getKey());
271 r.done(OperationResults.UNSENT);
277 this.requests.clear();
281 public final synchronized void onSessionDown(final PCEPSession session, final Exception e) {
282 LOG.warn("Session {} went down unexpectedly", session, e);
287 public final synchronized void onSessionTerminated(final PCEPSession session, final PCEPTerminationReason reason) {
288 LOG.info("Session {} terminated by peer with reason {}", session, reason);
293 public final synchronized void onMessage(final PCEPSession session, final Message message) {
294 if (this.nodeState == null) {
295 LOG.warn("Topology node state is null. Unhandled message {} on session {}", message, session);
296 session.close(TerminationReason.UNKNOWN);
299 final MessageContext ctx = new MessageContext(this.nodeState.beginTransaction());
301 if (onMessage(ctx, message)) {
302 LOG.warn("Unhandled message {} on session {}", message, session);
303 //cancel not supported, submit empty transaction
308 Futures.addCallback(ctx.trans.submit(), new FutureCallback<Void>() {
310 public void onSuccess(final Void result) {
311 LOG.trace("Internal state for session {} updated successfully", session);
312 ctx.notifyRequests();
316 public void onFailure(final Throwable t) {
317 LOG.error("Failed to update internal state for session {}, closing it", session, t);
318 ctx.notifyRequests();
319 session.close(TerminationReason.UNKNOWN);
321 }, MoreExecutors.directExecutor());
325 public void close() {
326 if (this.session != null) {
327 LOG.info("Closing session {}", session);
328 this.session.close(TerminationReason.UNKNOWN);
332 final synchronized PCEPRequest removeRequest(final S id) {
333 final PCEPRequest ret = this.requests.remove(id);
335 this.listenerState.processRequestStats(ret.getElapsedMillis());
337 LOG.trace("Removed request {} object {}", id, ret);
341 final synchronized ListenableFuture<OperationResult> sendMessage(final Message message, final S requestId,
342 final Metadata metadata) {
343 final io.netty.util.concurrent.Future<Void> f = this.session.sendMessage(message);
344 this.listenerState.updateStatefulSentMsg(message);
345 final PCEPRequest req = new PCEPRequest(metadata);
346 this.requests.put(requestId, req);
347 final short rpcTimeout = this.serverSessionManager.getRpcTimeout();
348 LOG.trace("RPC response timeout value is {} seconds", rpcTimeout);
349 if (rpcTimeout > 0) {
350 setupTimeoutHandler(requestId, req, rpcTimeout);
353 f.addListener((FutureListener<Void>) future -> {
354 if (!future.isSuccess()) {
355 synchronized (AbstractTopologySessionListener.this) {
356 AbstractTopologySessionListener.this.requests.remove(requestId);
358 req.done(OperationResults.UNSENT);
359 LOG.info("Failed to send request {}, instruction cancelled", requestId, future.cause());
362 LOG.trace("Request {} sent to peer (object {})", requestId, req);
366 return req.getFuture();
369 private void setupTimeoutHandler(final S requestId, final PCEPRequest req, final short timeout) {
370 final Timer timer = req.getTimer();
371 timer.schedule(new TimerTask() {
374 synchronized (AbstractTopologySessionListener.this) {
375 AbstractTopologySessionListener.this.requests.remove(requestId);
378 LOG.info("Request {} timed-out waiting for response", requestId);
380 }, TimeUnit.SECONDS.toMillis(timeout));
381 LOG.trace("Set up response timeout handler for request {}", requestId);
385 * Update an LSP in the data store
387 * @param ctx Message context
388 * @param id Revision-specific LSP identifier
389 * @param lspName LSP name
390 * @param rlb Reported LSP builder
391 * @param solicited True if the update was solicited
392 * @param remove True if this is an LSP path removal
394 protected final synchronized void updateLsp(final MessageContext ctx, final L id, final String lspName,
395 final ReportedLspBuilder rlb, final boolean solicited, final boolean remove) {
398 if (lspName == null) {
399 name = this.lsps.get(id);
401 LOG.error("PLSPID {} seen for the first time, not reporting the LSP", id);
408 LOG.debug("Saved LSP {} with name {}", id, name);
409 this.lsps.put(id, name);
412 final ReportedLsp previous = this.lspData.get(name);
413 // if no previous report about the lsp exist, just proceed
414 if (previous != null) {
415 final List<Path> updatedPaths = makeBeforeBreak(rlb, previous, name, remove);
416 // if all paths or the last path were deleted, delete whole tunnel
417 if (updatedPaths == null || updatedPaths.isEmpty()) {
418 LOG.debug("All paths were removed, removing LSP with {}.", id);
422 rlb.setPath(updatedPaths);
424 rlb.setKey(new ReportedLspKey(name));
427 // If this is an unsolicited update. We need to make sure we retain the metadata already present
429 this.nodeState.setLspMetadata(name, rlb.getMetadata());
431 rlb.setMetadata(this.nodeState.getLspMetadata(name));
434 final ReportedLsp rl = rlb.build();
435 ctx.trans.put(LogicalDatastoreType.OPERATIONAL, this.pccIdentifier.child(ReportedLsp.class, rlb.getKey()), rl);
436 LOG.debug("LSP {} updated to MD-SAL", name);
438 this.lspData.put(name, rl);
441 private List<Path> makeBeforeBreak(final ReportedLspBuilder rlb, final ReportedLsp previous, final String name, final boolean remove) {
442 // just one path should be reported
443 Preconditions.checkState(rlb.getPath().size() == 1);
444 final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.LspId reportedLspId = rlb.getPath().get(0).getLspId();
445 final List<Path> updatedPaths;
446 //lspId = 0 and remove = false -> tunnel is down, still exists but no path is signaled
447 //remove existing tunnel's paths now, as explicit path remove will not come
448 if (!remove && reportedLspId.getValue() == 0) {
449 updatedPaths = new ArrayList<>();
450 LOG.debug("Remove previous paths {} to this lsp name {}", previous.getPath(), name);
452 // check previous report for existing paths
453 updatedPaths = new ArrayList<>(previous.getPath());
454 LOG.debug("Found previous paths {} to this lsp name {}", updatedPaths, name);
455 for (final Path path : previous.getPath()) {
456 //we found reported path in previous reports
457 if (path.getLspId().getValue() == 0 || path.getLspId().equals(reportedLspId)) {
458 LOG.debug("Match on lsp-id {}", path.getLspId().getValue());
459 // path that was reported previously and does have the same lsp-id, path will be updated
460 final boolean r = updatedPaths.remove(path);
461 LOG.trace("Request removed? {}", r);
465 // if the path does not exist in previous report, add it to path list, it's a new ERO
466 // only one path will be added
467 //lspId is 0 means confirmation message that shouldn't be added (because we have no means of deleting it later)
468 LOG.trace("Adding new path {} to {}", rlb.getPath(), updatedPaths);
469 updatedPaths.addAll(rlb.getPath());
471 if (reportedLspId.getValue() == 0) {
472 // if lsp-id also 0, remove all paths
473 LOG.debug("Removing all paths.");
474 updatedPaths.clear();
476 // path is marked to be removed
477 LOG.debug("Removing path {} from {}", rlb.getPath(), updatedPaths);
478 final boolean r = updatedPaths.removeAll(rlb.getPath());
479 LOG.trace("Request removed? {}", r);
482 LOG.debug("Setting new paths {} to lsp {}", updatedPaths, name);
487 * Indicate that the peer has completed state synchronization.
489 * @param ctx Message context
491 protected final synchronized void stateSynchronizationAchieved(final MessageContext ctx) {
492 if (this.synced.getAndSet(true)) {
493 LOG.debug("State synchronization achieved while synchronizing, not updating state");
496 if (this.triggeredResyncInProcess) {
497 this.triggeredResyncInProcess = false;
499 updatePccNode(ctx, new PathComputationClientBuilder().setStateSync(PccSyncState.Synchronized).build());
501 // The node has completed synchronization, cleanup metadata no longer reported back
502 this.nodeState.cleanupExcept(this.lsps.values());
503 LOG.debug("Session {} achieved synchronized state", this.session);
506 protected final synchronized void updatePccNode(final MessageContext ctx, final PathComputationClient pcc) {
507 ctx.trans.merge(LogicalDatastoreType.OPERATIONAL, this.pccIdentifier, pcc);
510 protected final InstanceIdentifier<ReportedLsp> lspIdentifier(final String name) {
511 return this.pccIdentifier.child(ReportedLsp.class, new ReportedLspKey(name));
515 * Remove LSP from the database.
517 * @param ctx Message Context
518 * @param id Revision-specific LSP identifier
520 protected final synchronized void removeLsp(final MessageContext ctx, final L id) {
521 final String name = this.lsps.remove(id);
522 LOG.debug("LSP {} removed", name);
523 ctx.trans.delete(LogicalDatastoreType.OPERATIONAL, lspIdentifier(name));
524 this.lspData.remove(name);
527 protected abstract void onSessionUp(PCEPSession session, PathComputationClientBuilder pccBuilder);
530 * Perform revision-specific message processing when a message arrives.
532 * @param ctx Message processing context
533 * @param message Protocol message
534 * @return True if the message type is not handle.
536 protected abstract boolean onMessage(MessageContext ctx, Message message);
538 final String lookupLspName(final L id) {
539 requireNonNull(id, "ID parameter null.");
540 return this.lsps.get(id);
544 * Reads operational data on this node. Doesn't attempt to read the data,
545 * if the node does not exist. In this case returns null.
547 * @param id InstanceIdentifier of the node
548 * @return null if the node does not exists, or operational data
550 final synchronized <T extends DataObject> ListenableFuture<Optional<T>>
551 readOperationalData(final InstanceIdentifier<T> id) {
552 if (this.nodeState == null) {
555 return this.nodeState.readOperationalData(id);
558 protected abstract Object validateReportedLsp(final Optional<ReportedLsp> rep, final LspId input);
560 protected abstract void loadLspData(final Node node, final Map<String, ReportedLsp> lspData,
561 final Map<L, String> lsps, final boolean incrementalSynchro);
563 final boolean isLspDbPersisted() {
564 return this.syncOptimization != null && this.syncOptimization.isSyncAvoidanceEnabled();
567 final boolean isLspDbRetreived() {
568 return this.syncOptimization != null && this.syncOptimization.isDbVersionPresent();
572 * Is Incremental synchronization if LSP-DB-VERSION are included,
573 * LSP-DB-VERSION TLV values doesnt match, and LSP-SYNC-CAPABILITY is enabled
577 final boolean isIncrementalSynchro() {
578 return this.syncOptimization != null &&
579 this.syncOptimization.isSyncAvoidanceEnabled() &&
580 this.syncOptimization.isDeltaSyncEnabled();
583 final boolean isTriggeredInitialSynchro() {
584 return this.syncOptimization != null &&
585 this.syncOptimization.isTriggeredInitSyncEnabled();
588 final boolean isTriggeredReSyncEnabled() {
589 return this.syncOptimization != null &&
590 this.syncOptimization.isTriggeredReSyncEnabled();
593 protected final boolean isSynchronized() {
594 return this.syncOptimization != null &&
595 this.syncOptimization.doesLspDbMatch();
599 public synchronized int getDelegatedLspsCount() {
600 return Math.toIntExact(this.lspData.values().stream()
601 .map(ReportedLsp::getPath).filter(Objects::nonNull).filter(pathList -> !pathList.isEmpty())
602 // pick the first path, as delegate status should be same in each path
603 .map(pathList -> pathList.get(0))
604 .map(path -> path.getAugmentation(Path1.class)).filter(Objects::nonNull)
605 .map(LspObject::getLsp).filter(Objects::nonNull)
606 .filter(Lsp::isDelegate)
611 public boolean isSessionSynchronized() {
612 return this.synced.get();
616 public synchronized ListenableFuture<RpcResult<Void>> tearDownSession(final TearDownSessionInput input) {
618 return Futures.immediateFuture(RpcResultBuilder.<Void>success().build());
621 static final class MessageContext {
622 private final Collection<PCEPRequest> requests = new ArrayList<>();
623 private final WriteTransaction trans;
625 private MessageContext(final WriteTransaction trans) {
626 this.trans = requireNonNull(trans);
629 void resolveRequest(final PCEPRequest req) {
630 this.requests.add(req);
633 private void notifyRequests() {
634 for (final PCEPRequest r : this.requests) {
635 r.done(OperationResults.SUCCESS);