6eb88b018caf2cef0238b97583f6f5777c8f8411
[bgpcep.git] / pcep / tunnel-provider / src / main / java / org / opendaylight / bgpcep / pcep / tunnel / provider / TunnelProgramming.java
1 /*
2  * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
3  *
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
7  */
8 package org.opendaylight.bgpcep.pcep.tunnel.provider;
9
10 import java.util.ArrayList;
11 import java.util.List;
12
13 import org.opendaylight.bgpcep.pcep.topology.spi.AbstractTopologyProgrammingExecutor;
14 import org.opendaylight.bgpcep.programming.spi.InstructionExecutor;
15 import org.opendaylight.bgpcep.programming.spi.InstructionScheduler;
16 import org.opendaylight.bgpcep.programming.spi.SuccessfulRpcResult;
17 import org.opendaylight.bgpcep.programming.topology.TopologyProgrammingUtil;
18 import org.opendaylight.bgpcep.programming.tunnel.TunnelProgrammingUtil;
19 import org.opendaylight.controller.sal.binding.api.data.DataModificationTransaction;
20 import org.opendaylight.controller.sal.binding.api.data.DataProviderService;
21 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.IpAddress;
22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.bandwidth.object.BandwidthBuilder;
23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.classtype.object.ClassTypeBuilder;
24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.endpoints.AddressFamily;
25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.endpoints.address.family.Ipv4CaseBuilder;
26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.endpoints.address.family.Ipv6CaseBuilder;
27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.endpoints.address.family.ipv4._case.Ipv4Builder;
28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.endpoints.address.family.ipv6._case.Ipv6Builder;
29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.endpoints.object.EndpointsObjBuilder;
30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.explicit.route.object.Ero;
31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.explicit.route.object.EroBuilder;
32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.explicit.route.object.ero.Subobjects;
33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.explicit.route.object.ero.SubobjectsBuilder;
34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.lspa.object.LspaBuilder;
35 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev130930.submit.instruction.output.result.FailureCaseBuilder;
36 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev130930.submit.instruction.output.result.failure._case.Failure;
37 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev131024.AddLspInputBuilder;
38 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev131024.AddLspOutput;
39 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev131024.NetworkTopologyPcepService;
40 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev131024.OperationResult;
41 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev131024.RemoveLspInputBuilder;
42 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev131024.RemoveLspOutput;
43 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev131024.UpdateLspInputBuilder;
44 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev131024.UpdateLspOutput;
45 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev131024.add.lsp.args.ArgumentsBuilder;
46 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.p2p.rev130819.tunnel.p2p.path.cfg.attributes.ExplicitHops;
47 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.programming.rev131030.PcepCreateP2pTunnelInput;
48 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.programming.rev131030.PcepCreateP2pTunnelOutput;
49 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.programming.rev131030.PcepCreateP2pTunnelOutputBuilder;
50 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.programming.rev131030.PcepDestroyTunnelInput;
51 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.programming.rev131030.PcepDestroyTunnelOutput;
52 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.programming.rev131030.PcepDestroyTunnelOutputBuilder;
53 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.programming.rev131030.PcepUpdateTunnelInput;
54 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.programming.rev131030.PcepUpdateTunnelOutput;
55 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.programming.rev131030.PcepUpdateTunnelOutputBuilder;
56 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.programming.rev131030.TopologyTunnelPcepProgrammingService;
57 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.rev130820.AdministrativeStatus;
58 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.rev130820.ExplicitHops1;
59 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.rev130820.Link1;
60 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.rev130820.SupportingNode1;
61 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.programming.rev130930.TpReference;
62 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NodeId;
63 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology;
64 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Link;
65 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
66 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.NodeKey;
67 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.node.TerminationPoint;
68 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.node.TerminationPointKey;
69 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.node.attributes.SupportingNode;
70 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.nt.l3.unicast.igp.topology.rev131021.TerminationPoint1;
71 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.nt.l3.unicast.igp.topology.rev131021.igp.termination.point.attributes.igp.termination.point.attributes.TerminationPointType;
72 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.nt.l3.unicast.igp.topology.rev131021.igp.termination.point.attributes.igp.termination.point.attributes.termination.point.type.Ip;
73 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
74 import org.opendaylight.yangtools.yang.common.RpcResult;
75 import org.slf4j.Logger;
76 import org.slf4j.LoggerFactory;
77
78 import com.google.common.base.Function;
79 import com.google.common.base.Preconditions;
80 import com.google.common.util.concurrent.Futures;
81 import com.google.common.util.concurrent.ListenableFuture;
82
83 public final class TunnelProgramming implements TopologyTunnelPcepProgrammingService, AutoCloseable {
84         private static final Logger LOG = LoggerFactory.getLogger(TunnelProgramming.class);
85         private final NetworkTopologyPcepService topologyService;
86         private final DataProviderService dataProvider;
87         private final InstructionScheduler scheduler;
88
89         public TunnelProgramming(final InstructionScheduler scheduler, final DataProviderService dataProvider,
90                         final NetworkTopologyPcepService topologyService) {
91                 this.scheduler = Preconditions.checkNotNull(scheduler);
92                 this.dataProvider = Preconditions.checkNotNull(dataProvider);
93                 this.topologyService = Preconditions.checkNotNull(topologyService);
94         }
95
96         private static final class TpReader {
97                 private final DataModificationTransaction t;
98                 private final InstanceIdentifier<Node> nii;
99                 private final InstanceIdentifier<TerminationPoint> tii;
100
101                 TpReader(final DataModificationTransaction t, final InstanceIdentifier<Topology> topo, final TpReference ref) {
102                         this.t = Preconditions.checkNotNull(t);
103
104                         this.nii = InstanceIdentifier.builder(topo).child(Node.class, new NodeKey(ref.getNode())).toInstance();
105                         this.tii = InstanceIdentifier.builder(this.nii).child(TerminationPoint.class, new TerminationPointKey(ref.getTp())).toInstance();
106                 }
107
108                 private Node getNode() {
109                         return (Node) this.t.readOperationalData(this.nii);
110                 }
111
112                 private TerminationPoint getTp() {
113                         return (TerminationPoint) this.t.readOperationalData(this.tii);
114                 }
115         }
116
117         private AddressFamily buildAddressFamily(final TerminationPoint sp, final TerminationPoint dp) {
118                 // We need the IGP augmentation -- it has IP addresses
119                 final TerminationPoint1 sp1 = Preconditions.checkNotNull(sp.getAugmentation(TerminationPoint1.class));
120                 final TerminationPoint1 dp1 = Preconditions.checkNotNull(dp.getAugmentation(TerminationPoint1.class));
121
122                 // Get the types
123                 final TerminationPointType spt = sp1.getIgpTerminationPointAttributes().getTerminationPointType();
124                 final TerminationPointType dpt = dp1.getIgpTerminationPointAttributes().getTerminationPointType();
125
126                 // The types have to match
127                 Preconditions.checkArgument(spt.getImplementedInterface().equals(dpt.getImplementedInterface()));
128
129                 // And they have to actually be Ip
130                 final Ip sips = (Ip) spt;
131                 final Ip dips = (Ip) dpt;
132
133                 /*
134                  * Now a bit of magic. We need to find 'like' addresses, e.g. both
135                  * IPv4 or both IPv6. We are in IPv6-enabled world now, so let's
136                  * prefer that.
137                  */
138                 AddressFamily ret = findIpv6(sips.getIpAddress(), dips.getIpAddress());
139                 if (ret == null) {
140                         ret = findIpv4(sips.getIpAddress(), dips.getIpAddress());
141                 }
142
143                 // We need to have a ret now
144                 Preconditions.checkArgument(ret != null, "Failed to find like Endpoint addresses");
145
146                 return ret;
147         }
148
149         private AddressFamily findIpv4(final List<IpAddress> srcs, final List<IpAddress> dsts) {
150                 for (final IpAddress sc : srcs) {
151                         if (sc.getIpv4Address() != null) {
152                                 for (final IpAddress dc : dsts) {
153                                         if (dc.getIpv4Address() != null) {
154                                                 return new Ipv4CaseBuilder().setIpv4(
155                                                                 new Ipv4Builder().setSourceIpv4Address(sc.getIpv4Address()).setDestinationIpv4Address(dc.getIpv4Address()).build()).build();
156                                         }
157                                 }
158                         }
159                 }
160
161                 return null;
162         }
163
164         private AddressFamily findIpv6(final List<IpAddress> srcs, final List<IpAddress> dsts) {
165                 for (final IpAddress sc : srcs) {
166                         if (sc.getIpv6Address() != null) {
167                                 for (final IpAddress dc : dsts) {
168                                         if (dc.getIpv6Address() != null) {
169                                                 return new Ipv6CaseBuilder().setIpv6(
170                                                                 new Ipv6Builder().setSourceIpv6Address(sc.getIpv6Address()).setDestinationIpv6Address(dc.getIpv6Address()).build()).build();
171                                         }
172                                 }
173                         }
174                 }
175
176                 return null;
177         }
178
179         private NodeId supportingNode(final DataModificationTransaction t, final Node node) {
180                 for (final SupportingNode n : node.getSupportingNode()) {
181                         final SupportingNode1 n1 = n.getAugmentation(SupportingNode1.class);
182                         if (n1 != null && n1.getPathComputationClient().isControlling()) {
183                                 return n.getKey().getNodeRef();
184                         }
185                 }
186
187                 return null;
188         }
189
190         private Ero buildEro(final List<ExplicitHops> explicitHops) {
191                 final EroBuilder b = new EroBuilder();
192
193                 if (!explicitHops.isEmpty()) {
194                         final List<Subobjects> subobjs = new ArrayList<>(explicitHops.size());
195                         for (final ExplicitHops h : explicitHops) {
196
197                                 final ExplicitHops1 h1 = h.getAugmentation(ExplicitHops1.class);
198                                 if (h1 != null) {
199                                         final SubobjectsBuilder sb = new SubobjectsBuilder();
200                                         sb.fieldsFrom(h1);
201                                         sb.setLoose(h.isLoose());
202                                         subobjs.add(sb.build());
203                                 } else {
204                                         LOG.debug("Ignoring unhandled explicit hop {}", h);
205                                 }
206                         }
207                         b.setSubobjects(subobjs);
208                 }
209                 return b.build();
210         }
211
212         @Override
213         public ListenableFuture<RpcResult<PcepCreateP2pTunnelOutput>> pcepCreateP2pTunnel(final PcepCreateP2pTunnelInput input) {
214                 final InstructionExecutor e = new AbstractTopologyProgrammingExecutor() {
215                         @Override
216                         protected ListenableFuture<OperationResult> executeImpl() {
217                                 final InstanceIdentifier<Topology> tii = TopologyProgrammingUtil.topologyForInput(input);
218
219                                 final DataModificationTransaction t = TunnelProgramming.this.dataProvider.beginTransaction();
220
221                                 final TpReader dr = new TpReader(t, tii, input.getDestination());
222                                 final TpReader sr = new TpReader(t, tii, input.getSource());
223
224                                 final Node sn = Preconditions.checkNotNull(sr.getNode());
225                                 final TerminationPoint sp = Preconditions.checkNotNull(sr.getTp());
226                                 final TerminationPoint dp = Preconditions.checkNotNull(dr.getTp());
227
228                                 final AddLspInputBuilder ab = new AddLspInputBuilder();
229                                 ab.setNode(Preconditions.checkNotNull(supportingNode(t, sn)));
230                                 ab.setName(Preconditions.checkNotNull(input.getSymbolicPathName()));
231
232                                 // The link has to be non-existent
233                                 final InstanceIdentifier<Link> lii = NodeChangedListener.linkIdentifier(tii, ab.getNode(), ab.getName());
234                                 Preconditions.checkState(t.readOperationalData(lii) == null);
235
236                                 final ArgumentsBuilder args = new ArgumentsBuilder();
237                                 args.setAdministrative(input.getAdministrativeStatus() == AdministrativeStatus.Active);
238                                 args.setBandwidth(new BandwidthBuilder().setBandwidth(input.getBandwidth()).build());
239                                 args.setClassType(new ClassTypeBuilder().setClassType(input.getClassType()).build());
240                                 args.setEndpointsObj(new EndpointsObjBuilder().setAddressFamily(buildAddressFamily(sp, dp)).build());
241                                 args.setEro(buildEro(input.getExplicitHops()));
242                                 args.setLspa(new LspaBuilder(input).build());
243
244                                 ab.setArguments(args.build());
245
246                                 return Futures.transform(
247                                                 (ListenableFuture<RpcResult<AddLspOutput>>) TunnelProgramming.this.topologyService.addLsp(ab.build()),
248                                                 new Function<RpcResult<AddLspOutput>, OperationResult>() {
249                                                         @Override
250                                                         public OperationResult apply(final RpcResult<AddLspOutput> input) {
251                                                                 return input.getResult();
252                                                         }
253                                                 });
254                         }
255                 };
256
257                 final Failure f = this.scheduler.submitInstruction(input, e);
258                 final PcepCreateP2pTunnelOutputBuilder b = new PcepCreateP2pTunnelOutputBuilder();
259                 if (f != null) {
260                         b.setResult(new FailureCaseBuilder().setFailure(f).build());
261                 }
262
263                 final RpcResult<PcepCreateP2pTunnelOutput> res = SuccessfulRpcResult.create(b.build());
264                 return Futures.immediateFuture(res);
265         }
266
267         private Node sourceNode(final DataModificationTransaction t, final InstanceIdentifier<Topology> topology, final Link link) {
268                 final InstanceIdentifier<Node> nii = InstanceIdentifier.builder(topology).child(Node.class,
269                                 new NodeKey(link.getSource().getSourceNode())).toInstance();
270                 return (Node) t.readOperationalData(nii);
271         }
272
273         @Override
274         public ListenableFuture<RpcResult<PcepDestroyTunnelOutput>> pcepDestroyTunnel(final PcepDestroyTunnelInput input) {
275                 final InstructionExecutor e = new AbstractTopologyProgrammingExecutor() {
276                         @Override
277                         protected ListenableFuture<OperationResult> executeImpl() {
278                                 final InstanceIdentifier<Topology> tii = TopologyProgrammingUtil.topologyForInput(input);
279                                 final InstanceIdentifier<Link> lii = TunnelProgrammingUtil.linkIdentifier(tii, input);
280
281                                 final DataModificationTransaction t = TunnelProgramming.this.dataProvider.beginTransaction();
282
283                                 // The link has to exist
284                                 final Link link = (Link) t.readOperationalData(lii);
285                                 Preconditions.checkState(link != null);
286
287                                 // The source node has to exist
288                                 final Node node = sourceNode(t, tii, link);
289                                 Preconditions.checkState(node != null);
290
291                                 final RemoveLspInputBuilder ab = new RemoveLspInputBuilder();
292                                 ab.setName(link.getAugmentation(Link1.class).getSymbolicPathName());
293                                 ab.setNode(node.getSupportingNode().get(0).getKey().getNodeRef());
294
295                                 return Futures.transform(
296                                                 (ListenableFuture<RpcResult<RemoveLspOutput>>) TunnelProgramming.this.topologyService.removeLsp(ab.build()),
297                                                 new Function<RpcResult<RemoveLspOutput>, OperationResult>() {
298                                                         @Override
299                                                         public OperationResult apply(final RpcResult<RemoveLspOutput> input) {
300                                                                 return input.getResult();
301                                                         }
302                                                 });
303                         }
304                 };
305
306                 final Failure f = this.scheduler.submitInstruction(input, e);
307                 final PcepDestroyTunnelOutputBuilder b = new PcepDestroyTunnelOutputBuilder();
308                 if (f != null) {
309                         b.setResult(new FailureCaseBuilder().setFailure(f).build());
310                 }
311
312                 final RpcResult<PcepDestroyTunnelOutput> res = SuccessfulRpcResult.create(b.build());
313                 return Futures.immediateFuture(res);
314         }
315
316         @Override
317         public ListenableFuture<RpcResult<PcepUpdateTunnelOutput>> pcepUpdateTunnel(final PcepUpdateTunnelInput input) {
318                 final InstructionExecutor e = new AbstractTopologyProgrammingExecutor() {
319                         @Override
320                         protected ListenableFuture<OperationResult> executeImpl() {
321                                 final InstanceIdentifier<Topology> tii = TopologyProgrammingUtil.topologyForInput(input);
322                                 final InstanceIdentifier<Link> lii = TunnelProgrammingUtil.linkIdentifier(tii, input);
323
324                                 final DataModificationTransaction t = TunnelProgramming.this.dataProvider.beginTransaction();
325
326                                 // The link has to exist
327                                 final Link link = (Link) t.readOperationalData(lii);
328                                 Preconditions.checkState(link != null);
329
330                                 // The source node has to exist
331                                 final Node node = sourceNode(t, tii, link);
332                                 Preconditions.checkState(node != null);
333
334                                 final UpdateLspInputBuilder ab = new UpdateLspInputBuilder();
335                                 ab.setName(link.getAugmentation(Link1.class).getSymbolicPathName());
336                                 ab.setNode(Preconditions.checkNotNull(supportingNode(t, node)));
337
338                                 final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev131024.update.lsp.args.ArgumentsBuilder args = new org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.pcep.rev131024.update.lsp.args.ArgumentsBuilder();
339
340                                 args.setAdministrative(input.getAdministrativeStatus() == AdministrativeStatus.Active);
341                                 args.setBandwidth(new BandwidthBuilder().setBandwidth(input.getBandwidth()).build());
342                                 args.setClassType(new ClassTypeBuilder().setClassType(input.getClassType()).build());
343                                 args.setEro(buildEro(input.getExplicitHops()));
344                                 args.setLspa(new LspaBuilder(input).build());
345
346                                 ab.setArguments(args.build());
347
348                                 return Futures.transform(
349                                                 (ListenableFuture<RpcResult<UpdateLspOutput>>) TunnelProgramming.this.topologyService.updateLsp(ab.build()),
350                                                 new Function<RpcResult<UpdateLspOutput>, OperationResult>() {
351                                                         @Override
352                                                         public OperationResult apply(final RpcResult<UpdateLspOutput> input) {
353                                                                 return input.getResult();
354                                                         }
355                                                 });
356                         }
357                 };
358
359                 final Failure f = this.scheduler.submitInstruction(input, e);
360                 final PcepUpdateTunnelOutputBuilder b = new PcepUpdateTunnelOutputBuilder();
361                 if (f != null) {
362                         b.setResult(new FailureCaseBuilder().setFailure(f).build());
363                 }
364
365                 final RpcResult<PcepUpdateTunnelOutput> res = SuccessfulRpcResult.create(b.build());
366                 return Futures.immediateFuture(res);
367         }
368
369         @Override
370         public void close() {
371                 // FIXME: BUG-186: remove all scheduled instructions, etc.
372         }
373 }