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.controller.md.sal.binding.api.DataBroker;
  17 import org.opendaylight.protocol.bgp.openconfig.routing.policy.spi.RouteEntryBaseAttributes;
  18 import org.opendaylight.protocol.bgp.openconfig.routing.policy.spi.policy.condition.BgpConditionsAugmentationPolicy;
  19 import org.opendaylight.protocol.bgp.openconfig.routing.policy.spi.policy.condition.BgpConditionsPolicy;
  20 import org.opendaylight.protocol.bgp.openconfig.routing.policy.spi.policy.condition.ConditionsAugPolicy;
  21 import org.opendaylight.protocol.bgp.rib.spi.policy.BGPRouteEntryExportParameters;
  22 import org.opendaylight.protocol.bgp.rib.spi.policy.BGPRouteEntryImportParameters;
  23 import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.bgp.policy.rev151009.BgpMatchConditions;
  24 import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.bgp.policy.rev151009.routing.policy.policy.definitions.policy.definition.statements.statement.conditions.BgpConditions;
  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.rev171207.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 GenericConditionPolicyHandler genericConditionHandler;
  38     private BgpConditionsRegistry bgpConditionsRegistry = new BgpConditionsRegistry();
  39
  40     ConditionsRegistryImpl(final DataBroker databroker) {
  41         this.genericConditionHandler = new GenericConditionPolicyHandler(databroker);
  42     }
  43
  44     AbstractRegistration registerConditionPolicy(final Class<? extends Augmentation<Conditions>> conditionPolicyClass,
  45             final ConditionsAugPolicy conditionPolicy) {
  46         synchronized (this.conditionsRegistry) {
  47             final ConditionsAugPolicy prev = this.conditionsRegistry.putIfAbsent(conditionPolicyClass, conditionPolicy);
  48             Preconditions.checkState(prev == null, "Condition Policy %s already registered %s",
  49                     conditionPolicyClass, prev);
  50             return new AbstractRegistration() {
  51                 @Override
  52                 protected void removeRegistration() {
  53                     synchronized (ConditionsRegistryImpl.this.conditionsRegistry) {
  54                         ConditionsRegistryImpl.this.conditionsRegistry.remove(conditionPolicyClass);
  55                     }
  56                 }
  57             };
  58         }
  59     }
  60
  61     public AbstractRegistration registerBgpConditionsAugmentationPolicy(
  62             final Class<? extends Augmentation<BgpConditions>> conditionPolicyClass,
  63             final BgpConditionsAugmentationPolicy conditionPolicy) {
  64         return this.bgpConditionsRegistry
  65                 .registerBgpConditionsAugmentationPolicy(conditionPolicyClass, conditionPolicy);
  66     }
  67
  68     public <T extends ChildOf<BgpMatchConditions>, N> AbstractRegistration registerBgpConditionsPolicy(
  69             final Class<T> conditionPolicyClass,
  70             final BgpConditionsPolicy<T, N> conditionPolicy) {
  71         return this.bgpConditionsRegistry
  72                 .registerBgpConditionsPolicy(conditionPolicyClass, conditionPolicy);
  73     }
  74
  75     @SuppressWarnings("unchecked")
  76     boolean matchExportConditions(
  77             final RouteEntryBaseAttributes entryInfo,
  78             final BGPRouteEntryExportParameters routeEntryExportParameters,
  79             final Attributes attributes,
  80             final Conditions conditions) {
  81         if (!this.genericConditionHandler
  82                 .matchExportCondition(routeEntryExportParameters, conditions)) {
  83             return false;
  84         }
  85
  86         if (!this.bgpConditionsRegistry
  87                 .matchExportConditions(entryInfo, routeEntryExportParameters, attributes, conditions)) {
  88             return false;
  89         }
  90
  91         final Map<Class<? extends Augmentation<?>>, Augmentation<?>> conditionsAug = BindingReflections
  92                 .getAugmentations(conditions);
  93
  94         if (conditionsAug != null) {
  95             for (final Map.Entry<Class<? extends Augmentation<?>>, Augmentation<?>> entry : conditionsAug.entrySet()) {
  96                 final ConditionsAugPolicy handler = this.conditionsRegistry.get(entry.getKey());
  97                 if (handler == null) {
  98                     continue;
  99                 }
 100                 if (!handler.matchExportCondition(entryInfo, routeEntryExportParameters,
 101                         handler.getConditionParameter(attributes), entry.getValue())) {
 102                     return false;
 103                 }
 104             }
 105         }
 106
 107         return true;
 108     }
 109
 110     @SuppressWarnings("unchecked")
 111     boolean matchImportConditions(
 112             final RouteEntryBaseAttributes entryInfo,
 113             final BGPRouteEntryImportParameters routeEntryImportParameters,
 114             final Attributes attributes,
 115             final Conditions conditions) {
 116         if (!this.genericConditionHandler
 117                 .matchImportCondition(routeEntryImportParameters, conditions)) {
 118             return false;
 119         }
 120
 121         if (!this.bgpConditionsRegistry
 122                 .matchImportConditions(entryInfo, routeEntryImportParameters, attributes, conditions)) {
 123             return false;
 124         }
 125
 126         final Map<Class<? extends Augmentation<?>>, Augmentation<?>> conditionsAug = BindingReflections
 127                 .getAugmentations(conditions);
 128
 129         if (conditionsAug != null && attributes != null) {
 130             for (final Map.Entry<Class<? extends Augmentation<?>>, Augmentation<?>> entry : conditionsAug.entrySet()) {
 131                 final ConditionsAugPolicy handler = this.conditionsRegistry.get(entry.getKey());
 132                 if (handler != null) {
 133                     final Augmentation<Conditions> conditionConfig = (Augmentation<Conditions>) entry.getValue();
 134                     if (!handler.matchImportCondition(entryInfo, routeEntryImportParameters,
 135                             handler.getConditionParameter(attributes), conditionConfig)) {
 136                         return false;
 137                     }
 138                 }
 139             }
 140         }
 141         return true;
 142     }
 143 }