bgp/openconfig-rp-spi/src/main/java/org/opendaylight/protocol/bgp/openconfig/routing/policy/spi/registry/ConditionsRegistryImpl.java

   1 /*
   2  * Copyright (c) 2018 AT&T Intellectual Property. 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
   9 package org.opendaylight.protocol.bgp.openconfig.routing.policy.spi.registry;
  10
  11 import com.google.common.base.Preconditions;
  12 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
  13 import java.util.HashMap;
  14 import java.util.Map;
  15 import javax.annotation.concurrent.GuardedBy;
  16 import org.opendaylight.protocol.bgp.openconfig.routing.policy.spi.RouteEntryBaseAttributes;
  17 import org.opendaylight.protocol.bgp.openconfig.routing.policy.spi.policy.condition.BgpConditionsAugmentationPolicy;
  18 import org.opendaylight.protocol.bgp.openconfig.routing.policy.spi.policy.condition.BgpConditionsPolicy;
  19 import org.opendaylight.protocol.bgp.openconfig.routing.policy.spi.policy.condition.ConditionsAugPolicy;
  20 import org.opendaylight.protocol.bgp.rib.spi.policy.BGPRouteEntryExportParameters;
  21 import org.opendaylight.protocol.bgp.rib.spi.policy.BGPRouteEntryImportParameters;
  22 import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.bgp.policy.rev151009.BgpMatchConditions;
  23 import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.bgp.policy.rev151009.routing.policy.policy.definitions.policy.definition.statements.statement.conditions.BgpConditions;
  24 import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.bgp.types.rev151009.AfiSafiType;
  25 import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.routing.policy.rev151009.routing.policy.top.routing.policy.policy.definitions.policy.definition.statements.statement.Conditions;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.path.attributes.Attributes;
  27 import org.opendaylight.yangtools.concepts.AbstractRegistration;
  28 import org.opendaylight.yangtools.yang.binding.Augmentation;
  29 import org.opendaylight.yangtools.yang.binding.ChildOf;
  30 import org.opendaylight.yangtools.yang.binding.util.BindingReflections;
  31
  32 @SuppressFBWarnings("NM_CONFUSING")
  33 final class ConditionsRegistryImpl {
  34     @GuardedBy("this")
  35     private final Map<Class<? extends Augmentation<Conditions>>, ConditionsAugPolicy> conditionsRegistry
  36             = new HashMap<>();
  37     private final BgpConditionsRegistry bgpConditionsRegistry = new BgpConditionsRegistry();
  38
  39     ConditionsRegistryImpl() {
  40     }
  41
  42     AbstractRegistration registerConditionPolicy(final Class<? extends Augmentation<Conditions>> conditionPolicyClass,
  43             final ConditionsAugPolicy conditionPolicy) {
  44         synchronized (this.conditionsRegistry) {
  45             final ConditionsAugPolicy prev = this.conditionsRegistry.putIfAbsent(conditionPolicyClass, conditionPolicy);
  46             Preconditions.checkState(prev == null, "Condition Policy %s already registered %s",
  47                     conditionPolicyClass, prev);
  48             return new AbstractRegistration() {
  49                 @Override
  50                 protected void removeRegistration() {
  51                     synchronized (ConditionsRegistryImpl.this.conditionsRegistry) {
  52                         ConditionsRegistryImpl.this.conditionsRegistry.remove(conditionPolicyClass);
  53                     }
  54                 }
  55             };
  56         }
  57     }
  58
  59     public AbstractRegistration registerBgpConditionsAugmentationPolicy(
  60             final Class<? extends Augmentation<BgpConditions>> conditionPolicyClass,
  61             final BgpConditionsAugmentationPolicy conditionPolicy) {
  62         return this.bgpConditionsRegistry
  63                 .registerBgpConditionsAugmentationPolicy(conditionPolicyClass, conditionPolicy);
  64     }
  65
  66     public <T extends ChildOf<BgpMatchConditions>, N> AbstractRegistration registerBgpConditionsPolicy(
  67             final Class<T> conditionPolicyClass,
  68             final BgpConditionsPolicy<T, N> conditionPolicy) {
  69         return this.bgpConditionsRegistry
  70                 .registerBgpConditionsPolicy(conditionPolicyClass, conditionPolicy);
  71     }
  72
  73     @SuppressWarnings("unchecked")
  74     boolean matchExportConditions(
  75             final Class<? extends AfiSafiType> afiSafi,
  76             final RouteEntryBaseAttributes entryInfo,
  77             final BGPRouteEntryExportParameters routeEntryExportParameters,
  78             final Attributes attributes,
  79             final Conditions conditions) {
  80
  81         if (!this.bgpConditionsRegistry
  82                 .matchExportConditions(afiSafi, entryInfo, routeEntryExportParameters, attributes, conditions)) {
  83             return false;
  84         }
  85
  86         final Map<Class<? extends Augmentation<?>>, Augmentation<?>> conditionsAug = BindingReflections
  87                 .getAugmentations(conditions);
  88
  89         if (conditionsAug != null) {
  90             for (final Map.Entry<Class<? extends Augmentation<?>>, Augmentation<?>> entry : conditionsAug.entrySet()) {
  91                 final ConditionsAugPolicy handler = this.conditionsRegistry.get(entry.getKey());
  92                 if (handler == null) {
  93                     continue;
  94                 }
  95                 if (!handler.matchExportCondition(entryInfo, routeEntryExportParameters,
  96                         handler.getConditionParameter(attributes), entry.getValue())) {
  97                     return false;
  98                 }
  99             }
 100         }
 101
 102         return true;
 103     }
 104
 105     @SuppressWarnings("unchecked")
 106     boolean matchImportConditions(
 107             final Class<? extends AfiSafiType> afiSafi, final RouteEntryBaseAttributes entryInfo,
 108             final BGPRouteEntryImportParameters routeEntryImportParameters,
 109             final Attributes attributes,
 110             final Conditions conditions) {
 111         if (!this.bgpConditionsRegistry
 112                 .matchImportConditions(afiSafi, entryInfo, routeEntryImportParameters, attributes, conditions)) {
 113             return false;
 114         }
 115
 116         final Map<Class<? extends Augmentation<?>>, Augmentation<?>> conditionsAug = BindingReflections
 117                 .getAugmentations(conditions);
 118
 119         if (conditionsAug != null && attributes != null) {
 120             for (final Map.Entry<Class<? extends Augmentation<?>>, Augmentation<?>> entry : conditionsAug.entrySet()) {
 121                 final ConditionsAugPolicy handler = this.conditionsRegistry.get(entry.getKey());
 122                 if (handler != null) {
 123                     final Augmentation<Conditions> conditionConfig = (Augmentation<Conditions>) entry.getValue();
 124                     if (!handler.matchImportCondition(entryInfo, routeEntryImportParameters,
 125                             handler.getConditionParameter(attributes), conditionConfig)) {
 126                         return false;
 127                     }
 128                 }
 129             }
 130         }
 131         return true;
 132     }
 133 }