programming/impl/src/main/java/org/opendaylight/bgpcep/programming/impl/ProgrammingServiceImpl.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.programming.impl;
   9
  10 import com.google.common.base.Preconditions;
  11 import com.google.common.util.concurrent.CheckedFuture;
  12 import com.google.common.util.concurrent.FutureCallback;
  13 import com.google.common.util.concurrent.Futures;
  14 import com.google.common.util.concurrent.ListenableFuture;
  15 import com.google.common.util.concurrent.ListeningExecutorService;
  16 import com.google.common.util.concurrent.SettableFuture;
  17 import io.netty.util.Timeout;
  18 import io.netty.util.Timer;
  19 import java.math.BigInteger;
  20 import java.util.ArrayList;
  21 import java.util.Collections;
  22 import java.util.HashMap;
  23 import java.util.Iterator;
  24 import java.util.List;
  25 import java.util.Map;
  26 import java.util.concurrent.TimeUnit;
  27 import org.opendaylight.bgpcep.programming.NanotimeUtil;
  28 import org.opendaylight.bgpcep.programming.spi.ExecutionResult;
  29 import org.opendaylight.bgpcep.programming.spi.Instruction;
  30 import org.opendaylight.bgpcep.programming.spi.InstructionScheduler;
  31 import org.opendaylight.bgpcep.programming.spi.SchedulerException;
  32 import org.opendaylight.bgpcep.programming.spi.SuccessfulRpcResult;
  33 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  34 import org.opendaylight.controller.md.sal.binding.api.WriteTransaction;
  35 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  36 import org.opendaylight.controller.md.sal.common.api.data.TransactionCommitFailedException;
  37 import org.opendaylight.controller.sal.binding.api.BindingAwareBroker.RpcRegistration;
  38 import org.opendaylight.controller.sal.binding.api.NotificationProviderService;
  39 import org.opendaylight.controller.sal.binding.api.RpcProviderRegistry;
  40 import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonService;
  41 import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonServiceProvider;
  42 import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonServiceRegistration;
  43 import org.opendaylight.mdsal.singleton.common.api.ServiceGroupIdentifier;
  44 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev150720.CancelInstructionInput;
  45 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev150720.CancelInstructionOutput;
  46 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev150720.CancelInstructionOutputBuilder;
  47 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev150720.CleanInstructionsInput;
  48 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev150720.CleanInstructionsOutput;
  49 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev150720.CleanInstructionsOutputBuilder;
  50 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev150720.DeadOnArrival;
  51 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev150720.DuplicateInstructionId;
  52 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev150720.InstructionId;
  53 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev150720.InstructionStatus;
  54 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev150720.InstructionStatusChangedBuilder;
  55 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev150720.InstructionsQueue;
  56 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev150720.InstructionsQueueBuilder;
  57 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev150720.InstructionsQueueKey;
  58 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev150720.Nanotime;
  59 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev150720.ProgrammingService;
  60 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev150720.SubmitInstructionInput;
  61 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev150720.UnknownInstruction;
  62 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev150720.UnknownPreconditionId;
  63 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev150720.instruction.queue.InstructionBuilder;
  64 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev150720.instruction.queue.InstructionKey;
  65 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev150720.instruction.status.changed.Details;
  66 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev150720.submit.instruction.output.result.failure._case.FailureBuilder;
  67 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  68 import org.opendaylight.yangtools.yang.binding.KeyedInstanceIdentifier;
  69 import org.opendaylight.yangtools.yang.common.RpcResult;
  70 import org.osgi.framework.ServiceRegistration;
  71 import org.slf4j.Logger;
  72 import org.slf4j.LoggerFactory;
  73
  74 public final class ProgrammingServiceImpl implements AutoCloseable, ClusterSingletonService, InstructionScheduler,
  75     ProgrammingService {
  76     private static final Logger LOG = LoggerFactory.getLogger(ProgrammingServiceImpl.class);
  77
  78     private final Map<InstructionId, InstructionImpl> insns = new HashMap<>();
  79     private final InstanceIdentifier<InstructionsQueue> qid;
  80     private final NotificationProviderService notifs;
  81     private final ListeningExecutorService executor;
  82     private final DataBroker dataProvider;
  83     private final Timer timer;
  84     private final String instructionId;
  85     private final ServiceGroupIdentifier sgi;
  86     private final ClusterSingletonServiceRegistration csspReg;
  87     private final RpcProviderRegistry rpcProviderRegistry;
  88     private RpcRegistration<ProgrammingService> reg;
  89     private ServiceRegistration<?> serviceRegistration;
  90
  91     private final class InstructionPusher implements QueueInstruction {
  92         private final InstructionBuilder builder = new InstructionBuilder();
  93
  94         InstructionPusher(final InstructionId id, final Nanotime deadline) {
  95             this.builder.setDeadline(deadline);
  96             this.builder.setId(id);
  97             this.builder.setKey(new InstructionKey(id));
  98             this.builder.setStatus(InstructionStatus.Queued);
  99         }
 100
 101         @Override
 102         public void instructionUpdated(final InstructionStatus status, final Details details) {
 103             if (!status.equals(this.builder.getStatus())) {
 104                 this.builder.setStatus(status);
 105
 106                 final WriteTransaction t = ProgrammingServiceImpl.this.dataProvider.newWriteOnlyTransaction();
 107                 t.put(LogicalDatastoreType.OPERATIONAL,
 108                         ProgrammingServiceImpl.this.qid.child(
 109                                 org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev150720.instruction.queue.Instruction.class,
 110                                 new InstructionKey(this.builder.getId())), this.builder.build());
 111                 Futures.addCallback(t.submit(), new FutureCallback<Void>() {
 112                     @Override
 113                     public void onSuccess(final Void result) {
 114                         LOG.debug("Instruction Queue {} updated", ProgrammingServiceImpl.this.qid);
 115                     }
 116
 117                     @Override
 118                     public void onFailure(final Throwable t) {
 119                         LOG.error("Failed to update Instruction Queue {}", ProgrammingServiceImpl.this.qid, t);
 120                     }
 121                 });
 122             }
 123
 124             ProgrammingServiceImpl.this.notifs.publish(new InstructionStatusChangedBuilder().setId(this.builder.getId()).setStatus(status).setDetails(details).build());
 125         }
 126
 127         @Override
 128         public void instructionRemoved() {
 129             final WriteTransaction t = ProgrammingServiceImpl.this.dataProvider.newWriteOnlyTransaction();
 130             t.delete(LogicalDatastoreType.OPERATIONAL, ProgrammingServiceImpl.this.qid.child(
 131                     org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.programming.rev150720.instruction.queue.Instruction.class,
 132                     new InstructionKey(this.builder.getId())));
 133             Futures.addCallback(t.submit(), new FutureCallback<Void>() {
 134                 @Override
 135                 public void onSuccess(final Void result) {
 136                     LOG.debug("Instruction Queue {} removed", ProgrammingServiceImpl.this.qid);
 137                 }
 138
 139                 @Override
 140                 public void onFailure(final Throwable t) {
 141                     LOG.error("Failed to remove Instruction Queue {}", ProgrammingServiceImpl.this.qid, t);
 142                 }
 143             });
 144         }
 145     }
 146
 147     ProgrammingServiceImpl(final DataBroker dataProvider, final NotificationProviderService notifs,
 148         final ListeningExecutorService executor, final RpcProviderRegistry rpcProviderRegistry,
 149         final ClusterSingletonServiceProvider cssp, final Timer timer, final String instructionId) {
 150         this.dataProvider = Preconditions.checkNotNull(dataProvider);
 151         this.instructionId = Preconditions.checkNotNull(instructionId);
 152         this.notifs = Preconditions.checkNotNull(notifs);
 153         this.executor = Preconditions.checkNotNull(executor);
 154         this.rpcProviderRegistry = Preconditions.checkNotNull(rpcProviderRegistry);
 155         this.timer = Preconditions.checkNotNull(timer);
 156         this.qid = KeyedInstanceIdentifier.builder(InstructionsQueue.class,  new InstructionsQueueKey(this.instructionId)).build();
 157         this.sgi = ServiceGroupIdentifier.create("programming-"+ this.instructionId + "-service-group");
 158         this.csspReg = cssp.registerClusterSingletonService(this);
 159     }
 160
 161     @Override
 162     public void instantiateServiceInstance() {
 163         LOG.info("Instruction Queue service {} instantiated", this.sgi.getValue());
 164
 165         this.reg = this.rpcProviderRegistry.addRpcImplementation(ProgrammingService.class, this);
 166
 167         final WriteTransaction t = this.dataProvider.newWriteOnlyTransaction();
 168         t.put(LogicalDatastoreType.OPERATIONAL, this.qid, new InstructionsQueueBuilder()
 169             .setKey(new InstructionsQueueKey(this.instructionId)).setInstruction(Collections.emptyList()).build());
 170         Futures.addCallback(t.submit(), new FutureCallback<Void>() {
 171             @Override
 172             public void onSuccess(final Void result) {
 173                 LOG.debug("Instruction Queue {} added", ProgrammingServiceImpl.this.qid);
 174             }
 175
 176             @Override
 177             public void onFailure(final Throwable t) {
 178                 LOG.error("Failed to add Instruction Queue {}", ProgrammingServiceImpl.this.qid, t);
 179             }
 180         });
 181     }
 182
 183     @Override
 184     public ServiceGroupIdentifier getIdentifier() {
 185         return this.sgi;
 186     }
 187
 188     @Override
 189     public ListenableFuture<RpcResult<CancelInstructionOutput>> cancelInstruction(final CancelInstructionInput input) {
 190         return this.executor.submit(() -> realCancelInstruction(input));
 191     }
 192
 193     @Override
 194     public ListenableFuture<RpcResult<CleanInstructionsOutput>> cleanInstructions(final CleanInstructionsInput input) {
 195         return this.executor.submit(() -> realCleanInstructions(input));
 196     }
 197
 198     private synchronized RpcResult<CancelInstructionOutput> realCancelInstruction(final CancelInstructionInput input) {
 199         final InstructionImpl i = this.insns.get(input.getId());
 200         if (i == null) {
 201             LOG.debug("Instruction {} not present in the graph", input.getId());
 202
 203             final CancelInstructionOutput out = new CancelInstructionOutputBuilder().setFailure(UnknownInstruction.class).build();
 204             return SuccessfulRpcResult.create(out);
 205         }
 206
 207         return SuccessfulRpcResult.create(new CancelInstructionOutputBuilder().setFailure(i.tryCancel(null)).build());
 208     }
 209
 210     private synchronized RpcResult<CleanInstructionsOutput> realCleanInstructions(final CleanInstructionsInput input) {
 211         final List<InstructionId> failed = new ArrayList<>();
 212
 213         for (final InstructionId id : input.getId()) {
 214             // Find the instruction
 215             final InstructionImpl i = this.insns.get(id);
 216             if (i == null) {
 217                 LOG.debug("Instruction {} not present in the graph", input.getId());
 218                 failed.add(id);
 219                 continue;
 220             }
 221
 222             // Check its status
 223             switch (i.getStatus()) {
 224             case Cancelled:
 225             case Failed:
 226             case Successful:
 227                 break;
 228             case Executing:
 229             case Queued:
 230             case Scheduled:
 231             case Unknown:
 232                 LOG.debug("Instruction {} cannot be cleaned because of it's in state {}", id, i.getStatus());
 233                 failed.add(id);
 234                 continue;
 235             default:
 236                 break;
 237             }
 238
 239             // The instruction is in a terminal state, we need to just unlink
 240             // it from its dependencies and dependents
 241             i.clean();
 242
 243             this.insns.remove(id);
 244             LOG.debug("Instruction {} cleaned successfully", id);
 245         }
 246
 247         final CleanInstructionsOutputBuilder ob = new CleanInstructionsOutputBuilder();
 248         ob.setUnflushed(failed);
 249
 250         return SuccessfulRpcResult.create(ob.build());
 251     }
 252
 253     private List<InstructionImpl> checkDependencies(final SubmitInstructionInput input) throws SchedulerException {
 254         final List<InstructionImpl> dependencies = collectDependencies(input);
 255         // Check if all dependencies are non-failed
 256         final List<InstructionId> unmet = checkIfUnfailed(dependencies);
 257         /*
 258          *  Some dependencies have failed, declare the request dead-on-arrival
 259          *  and fail the operation.
 260          */
 261         if (!unmet.isEmpty()) {
 262             throw new SchedulerException("Instruction's dependencies are already unsuccessful", new FailureBuilder().setType(
 263                     DeadOnArrival.class).setFailedPreconditions(unmet).build());
 264         }
 265         return dependencies;
 266     }
 267
 268     private List<InstructionImpl> collectDependencies(final SubmitInstructionInput input) throws SchedulerException {
 269         final List<InstructionImpl> dependencies = new ArrayList<>();
 270         for (final InstructionId pid : input.getPreconditions()) {
 271             final InstructionImpl i = this.insns.get(pid);
 272             if (i == null) {
 273                 LOG.info("Instruction {} depends on {}, which is not a known instruction", input.getId(), pid);
 274                 throw new SchedulerException("Unknown dependency ID specified", new FailureBuilder().setType(UnknownPreconditionId.class).build());
 275             }
 276             dependencies.add(i);
 277         }
 278         return dependencies;
 279     }
 280
 281     private List<InstructionId> checkIfUnfailed(final List<InstructionImpl> dependencies) {
 282         final List<InstructionId> unmet = new ArrayList<>();
 283         for (final InstructionImpl d : dependencies) {
 284             switch (d.getStatus()) {
 285             case Cancelled:
 286             case Failed:
 287             case Unknown:
 288                 unmet.add(d.getId());
 289                 break;
 290             case Executing:
 291             case Queued:
 292             case Scheduled:
 293             case Successful:
 294                 break;
 295             default:
 296                 break;
 297             }
 298         }
 299         return unmet;
 300     }
 301
 302     @Override
 303     public synchronized ListenableFuture<Instruction> scheduleInstruction(final SubmitInstructionInput input) throws SchedulerException {
 304         final InstructionId id = input.getId();
 305         if (this.insns.get(id) != null) {
 306             LOG.info("Instruction ID {} already present", id);
 307             throw new SchedulerException("Instruction ID currently in use", new FailureBuilder().setType(DuplicateInstructionId.class).build());
 308         }
 309
 310         // First things first: check the deadline
 311         final Nanotime now = NanotimeUtil.currentTime();
 312         final BigInteger left = input.getDeadline().getValue().subtract(now.getValue());
 313
 314         if (left.compareTo(BigInteger.ZERO) <= 0) {
 315             LOG.debug("Instruction {} deadline has already passed by {}ns", id, left);
 316             throw new SchedulerException("Instruction arrived after specified deadline", new FailureBuilder().setType(DeadOnArrival.class).build());
 317         }
 318
 319         // Resolve dependencies
 320         final List<InstructionImpl> dependencies = checkDependencies(input);
 321
 322         /*
 323          * All pre-flight checks done are at this point, the following
 324          * steps can only fail in catastrophic scenarios (OOM and the
 325          * like).
 326          */
 327
 328         // Schedule a timeout for the instruction
 329         final Timeout t = this.timer.newTimeout(timeout -> timeoutInstruction(input.getId()), left.longValue(), TimeUnit.NANOSECONDS);
 330
 331         // Put it into the instruction list
 332         final SettableFuture<Instruction> ret = SettableFuture.create();
 333         final InstructionImpl i = new InstructionImpl(new InstructionPusher(id, input.getDeadline()), ret, id, dependencies, t);
 334         this.insns.put(id, i);
 335
 336         // Attach it into its dependencies
 337         for (final InstructionImpl d : dependencies) {
 338             d.addDependant(i);
 339         }
 340
 341         /*
 342          * All done. The next part is checking whether the instruction can
 343          * run, which we can figure out after sending out the acknowledgement.
 344          * This task should be ingress-weighed, so we reinsert it into the
 345          * same execution service.
 346          */
 347         this.executor.submit(() -> tryScheduleInstruction(i));
 348
 349         return ret;
 350     }
 351
 352     public String getInstructionID() {
 353         return this.instructionId;
 354     }
 355
 356     private synchronized void timeoutInstruction(final InstructionId id) {
 357         final InstructionImpl i = this.insns.get(id);
 358         if (i == null) {
 359             LOG.warn("Instruction {} timed out, but not found in the queue", id);
 360             return;
 361         }
 362
 363         i.timeout();
 364     }
 365
 366     private synchronized void tryScheduleDependants(final InstructionImpl i) {
 367         // Walk all dependants and try to schedule them
 368         final Iterator<InstructionImpl> it = i.getDependants();
 369         while (it.hasNext()) {
 370             tryScheduleInstruction(it.next());
 371         }
 372     }
 373
 374     private synchronized void tryScheduleInstruction(final InstructionImpl i) {
 375         final ListenableFuture<ExecutionResult<Details>> f = i.ready();
 376         if (f != null) {
 377             Futures.addCallback(f, new FutureCallback<ExecutionResult<Details>>() {
 378                 @Override
 379                 public void onSuccess(final ExecutionResult<Details> result) {
 380                     tryScheduleDependants(i);
 381                 }
 382
 383                 @Override
 384                 public void onFailure(final Throwable t) {
 385                     LOG.error("Instruction {} failed to execute", i.getId(), t);
 386                 }
 387             });
 388         }
 389
 390     }
 391
 392     @Override
 393     public ListenableFuture<Void> closeServiceInstance() {
 394         LOG.info("Closing Instruction Queue service {}", this.sgi.getValue());
 395
 396         this.reg.close();
 397         for (final InstructionImpl i : this.insns.values()) {
 398             i.tryCancel(null);
 399         }
 400         // Workaround for BUG-2283
 401         final WriteTransaction t = this.dataProvider.newWriteOnlyTransaction();
 402         t.delete(LogicalDatastoreType.OPERATIONAL, this.qid);
 403         final CheckedFuture<Void, TransactionCommitFailedException> future = t.submit();
 404         Futures.addCallback(future, new FutureCallback<Void>() {
 405             @Override
 406             public void onSuccess(final Void result) {
 407                 LOG.debug("Instruction Queue {} removed", ProgrammingServiceImpl.this.qid);
 408             }
 409
 410             @Override
 411             public void onFailure(final Throwable t) {
 412                 LOG.error("Failed to shutdown Instruction Queue {}", ProgrammingServiceImpl.this.qid, t);
 413             }
 414         });
 415         return future;
 416     }
 417
 418     @Override
 419     public synchronized void close() {
 420         if (this.csspReg != null) {
 421             try {
 422                 this.csspReg.close();
 423             } catch (final Exception e) {
 424                 LOG.debug("Failed to close Instruction Scheduler service");
 425             }
 426         }
 427         if (this.serviceRegistration != null) {
 428             this.serviceRegistration.unregister();
 429             this.serviceRegistration = null;
 430         }
 431     }
 432
 433     void setServiceRegistration(final ServiceRegistration<?> serviceRegistration) {
 434         this.serviceRegistration = serviceRegistration;
 435     }
 436 }