so - Service Orchestrator

about summary refs log tree commit diff stats

diff options

author	Oleksandr Moliavko <o.moliavko@samsung.com>	2019-06-25 17:02:53 +0300
committer	Oleksandr Moliavko <o.moliavko@samsung.com>	2019-06-25 17:12:31 +0300
commit	78de7cfde5847f003f6ded666a2338350753217a (patch)
tree	a576e2c2762359fa22dd135e299d40d87fff86f1 /docs/architecture
parent	f417537f5258530ed15ceaec111ce08a24ad6487 (diff)

Moved code inside IF checking for null ptr to prevent crash

Issue-ID: SO-1841 Signed-off-by: Oleksandr Moliavko <o.moliavko@samsung.com> Change-Id: Ie759b98828f39fba00ccdb7edcd7fc28e83ea50e

Diffstat (limited to 'docs/architecture')

0 files changed, 0 insertions, 0 deletions

'#n97'>97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066

/*
 * ============LICENSE_START=======================================================
 * ONAP
 * ================================================================================
 * Copyright (C) 2020 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ============LICENSE_END=========================================================
 */

package org.onap.policy.controlloop;

import java.time.Instant;
import java.util.Collections;
import java.util.stream.Collectors;
import org.onap.policy.controlloop.CanonicalOnset;
import org.onap.policy.controlloop.VirtualControlLoopEvent;
import org.onap.policy.controlloop.VirtualControlLoopNotification;
import org.onap.policy.controlloop.ControlLoopNotificationType;
import org.onap.policy.controlloop.actor.aai.AaiActor;
import org.onap.policy.controlloop.actor.aai.AaiGetPnfOperation;
import org.onap.policy.controlloop.actor.aai.AaiGetTenantOperation;
import org.onap.policy.controlloop.actor.guard.GuardActor;
import org.onap.policy.controlloop.actor.guard.DecisionOperation;
import org.onap.policy.controlloop.actorserviceprovider.Operation;
import org.onap.policy.controlloop.actorserviceprovider.OperationOutcome;
import org.onap.policy.controlloop.actorserviceprovider.OperationFinalResult;
import org.onap.policy.controlloop.actorserviceprovider.OperationProperties;
import org.onap.policy.controlloop.actorserviceprovider.OperationResult;
import org.onap.policy.controlloop.drl.legacy.ControlLoopParams;
import org.onap.policy.controlloop.eventmanager.ActorConstants;
import org.onap.policy.controlloop.eventmanager.Step;
import org.onap.policy.controlloop.utils.ControlLoopUtils;
import org.onap.policy.drools.apps.controller.usecases.UsecasesEventManager;
import org.onap.policy.drools.apps.controller.usecases.UsecasesEventManager.State;
import org.onap.policy.drools.apps.controller.usecases.UsecasesEventManager.NewEventStatus;
import org.onap.policy.drools.apps.controller.usecases.UsecasesEventManager.OperationOutcome2;
import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicy;

import org.slf4j.LoggerFactory;
import org.slf4j.Logger;

import org.onap.policy.drools.system.PolicyEngineConstants;

/*
*
* Called when the ControlLoopParams object has been inserted into working memory from the PAP.
*
*/
rule "INSERT.PARAMS"
    when
        $params : ControlLoopParams()
    then

    Logger logger = LoggerFactory.getLogger(drools.getRule().getPackage());
    logger.info("{}: {} : TOSCA-POLICY=[{}]", $params.getClosedLoopControlName(), $params.getPolicyName() + "."
        + drools.getRule().getName(), $params.getToscaPolicy());
end

/*
*
* Called when a Tosca Policy is present.
*
*/
rule "NEW.TOSCA.POLICY"
    when
        $policy : ToscaPolicy()
    then

    Logger logger = LoggerFactory.getLogger(drools.getRule().getPackage());
    logger.info("{}: [{}|{}|{}|{}]: CONTENT: {}", drools.getRule().getName(),
                $policy.getType(), $policy.getTypeVersion(), $policy.getName(),
                $policy.getVersion(), $policy);

    ControlLoopParams params = ControlLoopUtils.toControlLoopParams($policy);
    if (params != null) {
        insert(params);
    }
end

/*
 * Remove Control Loop Parameters.
 */
rule "REMOVE.PARAMS"
    when
        $params : ControlLoopParams( $policyName :  getPolicyName(), $policyVersion : getPolicyVersion() )
        not ( ToscaPolicy( getName() == $policyName, getVersion() == $policyVersion ) )
    then

    Logger logger = LoggerFactory.getLogger(drools.getRule().getPackage());
    logger.info("{}: [{}|{}|{}]", drools.getRule().getName(),
                $params.getPolicyScope(), $params.getPolicyName(), $params.getPolicyVersion());

    retract($params);
end

/*
*
* This rule responds to DCAE Events where there is no manager yet. Either it is
* the first ONSET, or a subsequent badly formed Event (i.e. Syntax error, or is-closed-loop-disabled)
*
*/
rule "EVENT"
    when
        $params : ControlLoopParams( $clName : getClosedLoopControlName() )
        $event : CanonicalOnset( closedLoopControlName == $clName )
        not ( UsecasesEventManager( closedLoopControlName == $event.getClosedLoopControlName(),
            getEvent() == $event ) )
    then

    Logger logger = LoggerFactory.getLogger(drools.getRule().getPackage());
    logger.info("{}: {}.{}: event={}",
                $clName, $params.getPolicyName(), drools.getRule().getName(),
                $event);
    //
    // Retract the event from memory; it will be managed by the manager from now on
    //
    retract($event);

    VirtualControlLoopNotification notification = null;

    try {
        //
        // Check the event, because we need it to not be null when
        // we create the UsecasesEventManager. The UsecasesEventManager
        // will do extra syntax checking as well as check if the closed loop is disabled.
        //
        if ($event.getRequestId() == null) {
            notification = new VirtualControlLoopNotification($event);
            notification.setNotification(ControlLoopNotificationType.REJECTED);
            notification.setFrom("policy");
            notification.setMessage("Missing requestId");
            notification.setPolicyName($params.getPolicyName() + "." + drools.getRule().getName());
            notification.setPolicyVersion($params.getPolicyVersion());

        } else {
            UsecasesEventManager manager = new UsecasesEventManager($params, $event, drools.getWorkingMemory());
            insert(manager);
            try {
                // load the first policy/step
                manager.start();

                if (manager.getSteps().isEmpty()) {
                    // no steps implies no policies, thus go straight to DONE state
                    manager.setState(State.DONE);

                    manager.setAccepted(true);

                    notification = manager.makeNotification();
                    notification.setNotification(ControlLoopNotificationType.ACTIVE);
                    notification.setPolicyName($params.getPolicyName() + "." + drools.getRule().getName());

                } else {
                    // Note: the notification will be generated lazily
                    manager.setState(State.POLICY_LOADED);
                }

            } catch(Exception e) {
                retract(manager);
                throw e;
            }
        }
    } catch (Exception e) {
        logger.warn("{}: {}.{}: error starting manager", $clName, $params.getPolicyName(),
                        drools.getRule().getName(), e);
        notification = new VirtualControlLoopNotification($event);
        notification.setNotification(ControlLoopNotificationType.REJECTED);
        notification.setMessage("Exception occurred: " + e.getMessage());
        notification.setPolicyName($params.getPolicyName() + "." + drools.getRule().getName());
        notification.setPolicyVersion($params.getPolicyVersion());
    }
    //
    // Generate notification
    //
    try {
        if (notification != null) {
            PolicyEngineConstants.getManager().deliver("POLICY-CL-MGT", notification);
        }

    } catch(RuntimeException e) {
        logger.warn("{}: {}.{}: event={} exception generating notification",
                $clName, $params.getPolicyName(), drools.getRule().getName(),
                $event, e);
    }
end

/*
*
* This rule fires when we get a subsequent event.
*
*/
rule "EVENT.MANAGER.NEW.EVENT"
    when
        $event : VirtualControlLoopEvent( )
        $manager : UsecasesEventManager( closedLoopControlName == $event.getClosedLoopControlName(),
            getEvent() == $event )
    then

    Logger logger = LoggerFactory.getLogger(drools.getRule().getPackage());
    logger.info("{}: {}.{}: event={} manager={}",
            $manager.getClosedLoopControlName(), $manager.getPolicyName(), drools.getRule().getName(),
            $event, $manager);
    //
    // Remove the event from memory
    //
    retract($event);

    //
    // Check what kind of event this is
    //
    switch($manager.onNewEvent($event)) {
        case SYNTAX_ERROR:
            //
            // Ignore any bad syntax events
            //
            logger.warn("{}: {}.{}: syntax error",
                $manager.getClosedLoopControlName(), $manager.getPolicyName(), drools.getRule().getName());
            break;

        case FIRST_ABATEMENT:
        case SUBSEQUENT_ABATEMENT:
            //
            // TODO: handle the abatement.  Currently, it's just discarded.
            //
            logger.info("{}: {}.{}: abatement",
                $manager.getClosedLoopControlName(), $manager.getPolicyName(), drools.getRule().getName());
            break;

        case FIRST_ONSET:
        case SUBSEQUENT_ONSET:
        default:
            //
            // We don't care about subsequent onsets
            //
            logger.warn("{}: {}.{}: subsequent onset",
                $manager.getClosedLoopControlName(), $manager.getPolicyName(), drools.getRule().getName());
            break;
    }
end

/*
*
* All steps have been executed, load the next policy.
*
*/
rule "EVENT.MANAGER.LOAD.NEXT.POLICY"
    when
        $manager : UsecasesEventManager(
                        isActive(),
                        getState() == State.POLICY_LOADED,
                        getSteps().isEmpty() )
    then

    Logger logger = LoggerFactory.getLogger(drools.getRule().getPackage());
    logger.info("{}: {}.{}: manager={}",
            $manager.getClosedLoopControlName(), $manager.getPolicyName(), drools.getRule().getName(),
            $manager);

    try {
        $manager.loadNextPolicy($manager.getResult());

        if ($manager.getSteps().isEmpty()) {
            // no steps - must be the final policy
            $manager.setState(State.DONE);
        }

    } catch(RuntimeException e) {
        logger.warn("{}: {}.{}: manager={} exception loading next policy",
                $manager.getClosedLoopControlName(), $manager.getPolicyName(), drools.getRule().getName(),
                $manager, e);
        $manager.abort(State.DONE, OperationFinalResult.FINAL_FAILURE_EXCEPTION, "failed to load next policy");
    }

    update($manager);
end

/*
*
* Policy loaded, identify any preprocessor steps that need to be run first.
*
*/
rule "EVENT.MANAGER.PREPROCESS"
    when
        $manager : UsecasesEventManager(
                        isActive(),
                        getState() == State.POLICY_LOADED,
                        $step : getSteps().peek(),
                        $step != null,
                        !$step.isPreprocessed() )
    then

    Logger logger = LoggerFactory.getLogger(drools.getRule().getPackage());
    logger.info("{}: {}.{}: {} manager={}",
            $manager.getClosedLoopControlName(), $manager.getPolicyName(), drools.getRule().getName(),
            $step, $manager);

    try {
        /*
         * Load any preprocessor steps.
         *
         * Note: this will not change the state of the manager, but it may change the
         * state of the step.
         */
        $step.setPreprocessed(true);
        $manager.loadPreprocessorSteps();

    } catch(RuntimeException e) {
        logger.warn("{}: {}.{}: manager={} exception loading preprocessor steps",
                $manager.getClosedLoopControlName(), $manager.getPolicyName(), drools.getRule().getName(),
                $manager, e);
        $manager.abort(State.DONE, OperationFinalResult.FINAL_FAILURE_EXCEPTION, "failed to load preprocessing steps");
    }

    update($manager);
end

/*
*
* Accepts the event, when ready to execute a step of interest.  Does not change the
* state of the manager, leaving that to be done by rule "EVENT.MANAGER.EXECUTE.STEP".
*
*/
rule "EVENT.MANAGER.ACCEPT"
    salience 200
    when
        $manager : UsecasesEventManager(
                        isActive(),
                        !isAccepted(),
                        getState() == State.POLICY_LOADED,
                        $step : getSteps().peek(),
                        $step != null,
                        $step.isPreprocessed(),
                        $step.acceptsEvent() )
    then

    Logger logger = LoggerFactory.getLogger(drools.getRule().getPackage());
    logger.info("{}: {}.{}: manager={}",
            $manager.getClosedLoopControlName(), $manager.getPolicyName(), drools.getRule().getName(),
            $step, $manager);

    try {
        $manager.setAccepted(true);

        VirtualControlLoopNotification notification = $manager.makeNotification();
        notification.setNotification(ControlLoopNotificationType.ACTIVE);
        notification.setPolicyName($manager.getPolicyName() + "." + drools.getRule().getName());
        $manager.deliver("POLICY-CL-MGT", notification, "notification", drools.getRule().getName());

    } catch(RuntimeException e) {
        logger.warn("{}: {}.{}: manager={} exception processing operation outcome",
                $manager.getClosedLoopControlName(), $manager.getPolicyName(), drools.getRule().getName(),
                $manager, e);
        $manager.abort(State.DONE, OperationFinalResult.FINAL_FAILURE_EXCEPTION, "failed to accept the event");
    }

    update($manager);
end

/*
*
* Ready to execute the step.
*
*/
rule "EVENT.MANAGER.EXECUTE.STEP"
    when
        $manager : UsecasesEventManager(
                        isActive(),
                        getState() == State.POLICY_LOADED,
                        $step : getSteps().peek(),
                        $step != null,
                        $step.isPreprocessed() )
    then

    Logger logger = LoggerFactory.getLogger(drools.getRule().getPackage());
    logger.info("{}: {}.{}: {} manager={}",
            $manager.getClosedLoopControlName(), $manager.getPolicyName(), drools.getRule().getName(),
            $step, $manager);

    try {
        $step.init();
        $step.setProperties();

        boolean guardDisabled = "true".equalsIgnoreCase(
                    PolicyEngineConstants.getManager().getEnvironmentProperty("guard.disabled"));

        if (guardDisabled && "GUARD".equals($step.getActorName())) {
            // guard is disabled - just enqueue a "SUCCESS" (i.e., "Permit")
            OperationOutcome outcome = $step.getParams().makeOutcome();
            outcome.setStart(Instant.now());
            outcome.setEnd(outcome.getStart());

            $manager.getOutcomes().add(outcome);
            $manager.setState(State.AWAITING_OUTCOME);

        } else if ($manager.executeStep()) {
            $manager.setState(State.AWAITING_OUTCOME);

        } else {
            // this step is no longer necessary - try the next one
            $manager.nextStep();
        }

    } catch(RuntimeException e) {
        logger.warn("{}: {}.{}: manager={} exception executing a step",
                $manager.getClosedLoopControlName(), $manager.getPolicyName(), drools.getRule().getName(),
                $manager, e);
        $manager.abort(State.DONE, OperationFinalResult.FINAL_FAILURE_EXCEPTION, "failed to execute the next step");
    }

    update($manager);
end

/*
*
* Generate SDNR notification.  Does not discard the outcome from the queue, leaving it to be
* handled by rule "EVENT.MANAGER.PROCESS.OUTCOME".
*
*/
rule "EVENT.MANAGER.GENERATE.SDNR.NOTIFICATION"
    // this should fire BEFORE the "EVENT.MANAGER.PROCESS.OUTCOME" rule
    salience 100
    when
        $manager : UsecasesEventManager(
                        isActive(),
                        getState() == State.AWAITING_OUTCOME,
                        $outcome : getOutcomes().peek(),
                        $outcome != null,
                        $outcome.getEnd() != null,
                        !isAbort($outcome),
                        $step : getSteps().peek(),
                        "SDNR".equals($step.getActorName()),
                        $outcome.isFor("SDNR", $step.getOperationName()) )
    then

    Logger logger = LoggerFactory.getLogger(drools.getRule().getPackage());
    logger.info("{}: {}.{}: {} manager={}",
            $manager.getClosedLoopControlName(), $manager.getPolicyName(), drools.getRule().getName(),
            $step, $manager);

    try {
        ControlLoopResponse clResponse = $manager.makeControlLoopResponse($outcome);
        $manager.deliver("DCAE_CL_RSP", clResponse, "SDNR notification", drools.getRule().getName());

    } catch(RuntimeException e) {
        logger.warn("{}: {}.{}: manager={} exception generating SDNR Response notification",
                $manager.getClosedLoopControlName(), $manager.getPolicyName(), drools.getRule().getName(),
                $manager, e);
    }
end

/*
*
* Process a GUARD outcome.  Does not discard the outcome from the queue, leaving it to be
* handled by rule "EVENT.MANAGER.PROCESS.OUTCOME".
*
*/
rule "EVENT.MANAGER.PROCESS.GUARD.OUTCOME"
    salience 100
    when
        $manager : UsecasesEventManager(
                        isActive(),
                        getState() == State.AWAITING_OUTCOME,
                        $outcome : getOutcomes().peek(),
                        $outcome != null,
                        !isAbort($outcome),
                        $step : getSteps().peek(),
                        "GUARD".equals($step.getActorName()),
                        $outcome.isFor("GUARD", $step.getOperationName()) )
    then

    Logger logger = LoggerFactory.getLogger(drools.getRule().getPackage());
    logger.info("{}: {}.{}: {} manager={}",
            $manager.getClosedLoopControlName(), $manager.getPolicyName(), drools.getRule().getName(),
            $step, $manager);

    try {
        VirtualControlLoopNotification notification = $manager.makeNotification();
        notification.setNotification(ControlLoopNotificationType.OPERATION);
        notification.setPolicyName($manager.getPolicyName() + "." + drools.getRule().getName());
        notification.setHistory(Collections.emptyList());

        // get actor/operation name from the policy step, not from the guard step
        Step step2 = $step.getParentStep();

        if ($outcome.getEnd() == null) {
            // it's a "start" operation
            notification.setMessage("Sending guard query for " + step2.getActorName() + " " + step2.getOperationName());

        } else if ($outcome.getResult() == OperationResult.SUCCESS) {
            notification.setMessage("Guard result for " + step2.getActorName() + " " + step2.getOperationName()
                                        + " is Permit");
        } else {
            // it's a failure
            notification.setMessage("Guard result for " + step2.getActorName() + " " + step2.getOperationName()
                                        + " is Deny");
        }

        $manager.deliver("POLICY-CL-MGT", notification, "GUARD notification", drools.getRule().getName());

    } catch(RuntimeException e) {
        logger.warn("{}: {}.{}: manager={} exception generating GUARD notification",
                $manager.getClosedLoopControlName(), $manager.getPolicyName(), drools.getRule().getName(),
                $manager, e);
    }
end

/*
*
* Process an outcome when the policy's operation starts.
*
*/
rule "EVENT.MANAGER.PROCESS.POLICY.STARTED"
    when
        $manager : UsecasesEventManager(
                        isActive(),
                        getState() == State.AWAITING_OUTCOME,
                        $outcome : getOutcomes().peek(),
                        $outcome != null,
                        $outcome.getEnd() == null,
                        $step : getSteps().peek(),
                        $step.isPolicyStep(),
                        $outcome.isFor($step.getActorName(), $step.getOperationName()) )
    then

    Logger logger = LoggerFactory.getLogger(drools.getRule().getPackage());
    logger.info("{}: {}.{}: {} manager={}",
            $manager.getClosedLoopControlName(), $manager.getPolicyName(), drools.getRule().getName(),
            $step, $manager);

    try {
        $manager.getOutcomes().remove();

        // it's a "start" operation for the step
        $manager.bumpAttempts();

        $manager.addToHistory($outcome);
        $manager.storeInDataBase($manager.getPartialHistory().peekLast());

        VirtualControlLoopNotification notification = $manager.makeNotification();
        notification.setNotification(ControlLoopNotificationType.OPERATION);
        notification.setPolicyName($manager.getPolicyName() + "." + drools.getRule().getName());
        notification.setHistory(Collections.emptyList());
        notification.setMessage($manager.getOperationMessage());

        $manager.deliver("POLICY-CL-MGT", notification, "notification", drools.getRule().getName());

    } catch(RuntimeException e) {
        logger.warn("{}: {}.{}: manager={} exception processing operation outcome",
                $manager.getClosedLoopControlName(), $manager.getPolicyName(), drools.getRule().getName(),
                $manager, e);
        $manager.abort(State.DONE, OperationFinalResult.FINAL_FAILURE_EXCEPTION, "failed to handle policy 'start' outcome");
    }

    update($manager);
end

/*
*
* Process an outcome when an arbitrary Preprocessor step starts.
*
*/
rule "EVENT.MANAGER.PROCESS.PREPROCESSOR.STARTED"
    when
        $manager : UsecasesEventManager(
                        isActive(),
                        getState() == State.AWAITING_OUTCOME,
                        $outcome : getOutcomes().peek(),
                        $outcome != null,
                        $outcome.getEnd() == null,
                        $step : getSteps().peek(),
                        !$step.isPolicyStep(),
                        $outcome.isFor($step.getActorName(), $step.getOperationName()) )
    then

    Logger logger = LoggerFactory.getLogger(drools.getRule().getPackage());
    logger.info("{}: {}.{}: {} manager={}",
            $manager.getClosedLoopControlName(), $manager.getPolicyName(), drools.getRule().getName(),
            $step, $manager);

    try {
        $manager.getOutcomes().remove();

        // it's a "start" operation for the step
        $manager.bumpAttempts();

    } catch(RuntimeException e) {
        logger.warn("{}: {}.{}: manager={} exception processing operation outcome",
                $manager.getClosedLoopControlName(), $manager.getPolicyName(), drools.getRule().getName(),
                $manager, e);
        $manager.abort(State.DONE, OperationFinalResult.FINAL_FAILURE_EXCEPTION, "failed to handle 'start' outcome");
    }

    update($manager);
end

/*
*
* Process an outcome when the policy's operation succeeds.
*
*/
rule "EVENT.MANAGER.PROCESS.POLICY.SUCCESS"
    when
        $manager : UsecasesEventManager(
                        isActive(),
                        getState() == State.AWAITING_OUTCOME,
                        $outcome : getOutcomes().peek(),
                        $outcome != null,
                        $outcome.getEnd() != null,
                        $outcome.getResult() == OperationResult.SUCCESS,
                        $step : getSteps().peek(),
                        $step.isPolicyStep(),
                        $outcome.isFor($step.getActorName(), $step.getOperationName()) )
    then

    Logger logger = LoggerFactory.getLogger(drools.getRule().getPackage());
    logger.info("{}: {}.{}: {} manager={}",
            $manager.getClosedLoopControlName(), $manager.getPolicyName(), drools.getRule().getName(),
            $step, $manager);

    try {
        $manager.getOutcomes().remove();

        // let the step record the response that's contained within the outcome
        $step.success($outcome);

        $manager.addToHistory($outcome);
        $manager.storeInDataBase($manager.getPartialHistory().peekLast());

        $manager.setResult($outcome.getResult());

        VirtualControlLoopNotification notification = $manager.makeNotification();
        notification.setNotification(ControlLoopNotificationType.OPERATION_SUCCESS);
        notification.setPolicyName($manager.getPolicyName() + "." + drools.getRule().getName());
        notification.setHistory($manager.getPartialHistory().stream().map(OperationOutcome2::getClOperation)
                                .collect(Collectors.toList()));

        // this step is complete - discard it
        $manager.getSteps().remove();

        $manager.setState(State.POLICY_LOADED);

        $manager.deliver("POLICY-CL-MGT", notification, "notification", drools.getRule().getName());

    } catch(RuntimeException e) {
        logger.warn("{}: {}.{}: manager={} exception processing operation outcome",
                $manager.getClosedLoopControlName(), $manager.getPolicyName(), drools.getRule().getName(),
                $manager, e);
        $manager.abort(State.DONE, OperationFinalResult.FINAL_FAILURE_EXCEPTION, "failed to handle policy 'success' outcome");
    }

    update($manager);
end

/*
*
* Process a final failure outcome, when the event has been accepted.
*
*/
rule "EVENT.MANAGER.PROCESS.FINAL.FAILURE.ACCEPTED"
    when
        $manager : UsecasesEventManager(
                        isActive(),
                        isAccepted(),
                        getState() == State.AWAITING_OUTCOME,
                        $outcome : getOutcomes().peek(),
                        $outcome != null,
                        !isAbort($outcome),
                        $outcome.getEnd() != null,
                        $outcome.isFinalOutcome(),
                        $outcome.getResult() != OperationResult.SUCCESS,
                        $step : getSteps().peek() )
    then

    Logger logger = LoggerFactory.getLogger(drools.getRule().getPackage());
    logger.info("{}: {}.{}: {} manager={}",
            $manager.getClosedLoopControlName(), $manager.getPolicyName(), drools.getRule().getName(),
            $step, $manager);

    try {
        $manager.getOutcomes().remove();

        if (!$outcome.isFor($step.getActorName(), $step.getOperationName())) {
            $outcome.setResult(OperationResult.FAILURE_GUARD);
            $outcome.setMessage("Operation denied by " + $outcome.getActor());
        }

        // final failure for this policy
        $manager.addToHistory($outcome);
        $manager.storeInDataBase($manager.getPartialHistory().peekLast());

        $manager.setResult($outcome.getResult());

        VirtualControlLoopNotification notification = $manager.makeNotification();
        notification.setNotification(ControlLoopNotificationType.OPERATION_FAILURE);
        notification.setPolicyName($manager.getPolicyName() + "." + drools.getRule().getName());
        notification.setHistory($manager.getPartialHistory().stream().map(OperationOutcome2::getClOperation)
                                .collect(Collectors.toList()));

        // trigger move to the next policy - clear all steps
        $manager.getSteps().clear();
        $manager.setState(State.POLICY_LOADED);

        $manager.deliver("POLICY-CL-MGT", notification, "notification", drools.getRule().getName());

    } catch(RuntimeException e) {
        logger.warn("{}: {}.{}: manager={} exception processing operation outcome",
                $manager.getClosedLoopControlName(), $manager.getPolicyName(), drools.getRule().getName(),
                $manager, e);
        $manager.abort(State.DONE, OperationFinalResult.FINAL_FAILURE_EXCEPTION, "failed to handle policy 'failure' outcome");
    }

    update($manager);
end

/*
*
* Process a final failure outcome, when the event has NOT been accepted.  This typically
* occurs when an A&AI query fails BEFORE the first lock has been requested (and thus
* before the first policy's operation has been started).
*
*/
rule "EVENT.MANAGER.PROCESS.FINAL.FAILURE.REJECTED"
    when
        $manager : UsecasesEventManager(
                        isActive(),
                        !isAccepted(),
                        getState() == State.AWAITING_OUTCOME,
                        $outcome : getOutcomes().peek(),
                        $outcome != null,
                        !isAbort($outcome),
                        $outcome.getEnd() != null,
                        $outcome.isFinalOutcome(),
                        $outcome.getResult() != OperationResult.SUCCESS,
                        $step : getSteps().peek() )
    then

    Logger logger = LoggerFactory.getLogger(drools.getRule().getPackage());
    logger.info("{}: {}.{}: {} manager={}",
            $manager.getClosedLoopControlName(), $manager.getPolicyName(), drools.getRule().getName(),
            $step, $manager);

    retract($manager);

    try {
        // final failure for this policy
        $manager.addToHistory($outcome);

        $manager.setResult($outcome.getResult());

        VirtualControlLoopNotification notification = $manager.makeNotification();
        notification.setNotification(ControlLoopNotificationType.REJECTED);
        notification.setPolicyName($manager.getPolicyName() + "." + drools.getRule().getName());
        notification.setHistory($manager.getPartialHistory().stream().map(OperationOutcome2::getClOperation)
                                .collect(Collectors.toList()));

        $manager.deliver("POLICY-CL-MGT", notification, "notification", drools.getRule().getName());

    } catch(RuntimeException e) {
        logger.warn("{}: {}.{}: manager={} exception processing operation outcome",
                $manager.getClosedLoopControlName(), $manager.getPolicyName(), drools.getRule().getName(),
                $manager, e);
        $manager.abort(State.DONE, OperationFinalResult.FINAL_FAILURE_EXCEPTION, "failed to reject event");
    }

    $manager.destroy();
end

/*
*
* Process an outcome when the policy's operation fails.
*
*/
rule "EVENT.MANAGER.PROCESS.POLICY.FAILURE"
    when
        $manager : UsecasesEventManager(
                        isActive(),
                        getState() == State.AWAITING_OUTCOME,
                        $outcome : getOutcomes().peek(),
                        $outcome != null,
                        !isAbort($outcome),
                        $outcome.getEnd() != null,
                        !$outcome.isFinalOutcome(),
                        $outcome.getResult() != OperationResult.SUCCESS,
                        $step : getSteps().peek(),
                        $step.isPolicyStep(),
                        $outcome.isFor($step.getActorName(), $step.getOperationName()) )
    then

    Logger logger = LoggerFactory.getLogger(drools.getRule().getPackage());
    logger.info("{}: {}.{}: {} manager={}",
            $manager.getClosedLoopControlName(), $manager.getPolicyName(), drools.getRule().getName(),
            $step, $manager);

    try {
        // not a final failure, thus it will be retried automatically

        $manager.getOutcomes().remove();

        // do NOT invoke manager.setResult()

        $manager.addToHistory($outcome);
        $manager.storeInDataBase($manager.getPartialHistory().peekLast());

        VirtualControlLoopNotification notification = $manager.makeNotification();
        notification.setNotification(ControlLoopNotificationType.OPERATION_FAILURE);
        notification.setPolicyName($manager.getPolicyName() + "." + drools.getRule().getName());

        $manager.deliver("POLICY-CL-MGT", notification, "notification", drools.getRule().getName());

    } catch(RuntimeException e) {
        logger.warn("{}: {}.{}: manager={} exception processing operation outcome",
                $manager.getClosedLoopControlName(), $manager.getPolicyName(), drools.getRule().getName(),
                $manager, e);
        $manager.abort(State.DONE, OperationFinalResult.FINAL_FAILURE_EXCEPTION, "failed to handle policy 'failure' outcome");
    }

    update($manager);
end

/*
*
* Discard an outcome that was not handled by any other rule.
*
*/
rule "EVENT.MANAGER.DISCARD.OUTCOME"
    salience -10
    when
        $manager : UsecasesEventManager(
                        isActive(),
                        getState() == State.AWAITING_OUTCOME,
                        $outcome : getOutcomes().peek(),
                        $outcome != null,
                        $step : getSteps().peek() )
    then

    Logger logger = LoggerFactory.getLogger(drools.getRule().getPackage());
    logger.info("{}: {}.{}: {} {} manager={}",
            $manager.getClosedLoopControlName(), $manager.getPolicyName(), drools.getRule().getName(),
            $step, $outcome.getResult(), $manager);

    try {
        $manager.getOutcomes().remove();

        if ($outcome.getEnd() != null && $outcome.isFor($step.getActorName(), $step.getOperationName())) {
            // it's a completion for the step

            // let the step record the response that's contained within the outcome
            if ($outcome.getResult() == OperationResult.SUCCESS) {
                $step.success($outcome);
            }

            // this step is complete - discard it
            $manager.getSteps().remove();

            $manager.setState(State.POLICY_LOADED);
        }

    } catch(RuntimeException e) {
        logger.warn("{}: {}.{}: manager={} exception processing operation outcome",
                $manager.getClosedLoopControlName(), $manager.getPolicyName(), drools.getRule().getName(),
                $manager, e);
        $manager.abort(State.DONE, OperationFinalResult.FINAL_FAILURE_EXCEPTION, "failed to handle outcome");
    }

    update($manager);
end

/*
*
* Abort processing.  This can happen in any state (once the manager has been started).
*
*/
rule "EVENT.MANAGER.ABORT"
    when
        $manager : UsecasesEventManager(
                        isActive(),
                        getState() != State.DONE,
                        $outcome : getOutcomes().peek(),
                        $outcome != null,
                        isAbort($outcome),
                        $step : getSteps().peek() )
    then

    Logger logger = LoggerFactory.getLogger(drools.getRule().getPackage());
    logger.info("{}: {}.{}: {} manager={}",
            $manager.getClosedLoopControlName(), $manager.getPolicyName(), drools.getRule().getName(),
            $step, $manager);

    try {
        // determine the final message
        String msg;
        switch ($outcome.getActor()) {
            case ActorConstants.CL_TIMEOUT_ACTOR:
                msg = "Control Loop timed out";
                break;
            case ActorConstants.LOCK_ACTOR:
                msg = "Target Lock was lost";
                break;
            default:
                msg = "Processing aborted by " + $outcome.getActor();
                break;
        }

        $manager.abort(State.DONE, OperationFinalResult.FINAL_FAILURE, msg);

        if ($step != null && "SDNR".equals($step.getActorName())
                && $outcome.isFor($step.getActorName(), $step.getOperationName())) {

            // aborted while processing the SDNR step - generate a notification
            ControlLoopResponse clResponse = $manager.makeControlLoopResponse($outcome);
            $manager.deliver("DCAE_CL_RSP", clResponse, "SDNR notification", drools.getRule().getName());
        }

        if ($step != null) {
            $outcome.setActor($step.getActorName());
            $outcome.setOperation($step.getOperationName());

            $manager.addToHistory($outcome);
            $manager.storeInDataBase($manager.getPartialHistory().peekLast());
        }

    } catch(RuntimeException e) {
        logger.warn("{}: {}.{}: manager={} exception handling ABORT outcome",
                $manager.getClosedLoopControlName(), $manager.getPolicyName(), drools.getRule().getName(),
                $manager, e);
        $manager.abort(State.DONE, OperationFinalResult.FINAL_FAILURE_EXCEPTION, "failed to handle ABORT");
    }

    update($manager);
end

/*
*
* Done processing.  Arriving here implies that the event has been accepted.
*
*/
rule "EVENT.MANAGER.FINAL"
    when
        $manager : UsecasesEventManager(
                        !isActive() || getState() == State.DONE )
    then

    Logger logger = LoggerFactory.getLogger(drools.getRule().getPackage());
    logger.info("{}: {}.{}: manager={}",
            $manager.getClosedLoopControlName(), $manager.getPolicyName(), drools.getRule().getName(),
            $manager);

    retract($manager);

    try {
        VirtualControlLoopNotification notification = $manager.makeNotification();
        notification.setPolicyName($manager.getPolicyName() + "." + drools.getRule().getName());
        notification.setHistory($manager.getFullHistory().stream().map(OperationOutcome2::getClOperation)
                                    .collect(Collectors.toList()));

        OperationFinalResult finalResult = $manager.getFinalResult();
        if (finalResult == null) {
            finalResult = ($manager.isActive() ? OperationFinalResult.FINAL_SUCCESS : OperationFinalResult.FINAL_FAILURE);
        }

        switch (finalResult) {
            case FINAL_FAILURE_EXCEPTION:
                notification.setNotification(ControlLoopNotificationType.FINAL_FAILURE);
                notification.setMessage("Exception in processing closed loop");
                break;
            case FINAL_SUCCESS:
                notification.setNotification(ControlLoopNotificationType.FINAL_SUCCESS);
                break;
            case FINAL_OPENLOOP:
                notification.setNotification(ControlLoopNotificationType.FINAL_OPENLOOP);
                break;
            case FINAL_FAILURE:
            default:
                notification.setNotification(ControlLoopNotificationType.FINAL_FAILURE);
                break;
        }

        if ($manager.getFinalMessage() != null) {
            notification.setMessage($manager.getFinalMessage());
        }

        $manager.deliver("POLICY-CL-MGT", notification, "notification", drools.getRule().getName());

    } catch(RuntimeException e) {
        logger.warn("{}: {}.{}: manager={} exception generating final notification",
                $manager.getClosedLoopControlName(), $manager.getPolicyName(), drools.getRule().getName(),
                $manager, e);
    }

    $manager.destroy();
end

/*
*
* This rule will clean up any rogue events where there is no
* ControlLoopParams object corresponding to the onset event.
*
*/
rule "EVENT.CLEANUP"
    salience -100
    when
        $event : VirtualControlLoopEvent( $clName: closedLoopControlName )
    then

    Logger logger = LoggerFactory.getLogger(drools.getRule().getPackage());
    logger.info("{}: {}", $clName, drools.getRule().getName());
    logger.debug("{}: {}: orphan event={}",
                $clName, drools.getRule().getName(), $event);
    //
    // Retract the event
    //
    retract($event);
end

/*
*
* At this point, it appears that if we prevent the rules from getting messages from
* topics, then that will also prevent the actors from getting them.  So the following
* rules are here just to discard those messages.
*
* These have a higher salience so the objects are removed before the "FINAL" message
* is processed, so that the junit test can assume things are done once they see the
* "FINAL" message.  Otherwise, tests might fail sporadically.
*
*/
rule "APPC.Response.CLEANUP"
    salience 1
    when
        $msg : org.onap.policy.appc.Response( )
    then
        retract($msg);
end

rule "APPC.Request.CLEANUP"
    salience 1
    when
        $msg : org.onap.policy.appc.Request( )
    then
        retract($msg);
end

rule "APPC-LCM.Response.CLEANUP"
    salience 1
    when
        $msg : org.onap.policy.appclcm.AppcLcmDmaapWrapper( )
    then
        retract($msg);
end

rule "SDNR.Response.CLEANUP"
    salience 1
    when
        $msg : org.onap.policy.sdnr.PciResponseWrapper( )
    then
        retract($msg);
end


context:
space:
mode: