sxp-integration/sxp-ep-provider/src/main/java/org/opendaylight/groupbasedpolicy/sxp/ep/provider/impl/dao/EPPolicyTemplateDaoFacadeImpl.java

   1 /*
   2  * Copyright (c) 2016 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
   9 package org.opendaylight.groupbasedpolicy.sxp.ep.provider.impl.dao;
  10
  11 import com.google.common.base.Function;
  12 import com.google.common.base.Optional;
  13 import com.google.common.util.concurrent.AsyncFunction;
  14 import com.google.common.util.concurrent.Futures;
  15 import com.google.common.util.concurrent.ListenableFuture;
  16 import java.util.Collection;
  17 import javax.annotation.Nonnull;
  18 import javax.annotation.Nullable;
  19 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  20 import org.opendaylight.controller.md.sal.binding.api.WriteTransaction;
  21 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  22 import org.opendaylight.groupbasedpolicy.sxp.ep.provider.api.EPPolicyTemplateDaoFacade;
  23 import org.opendaylight.groupbasedpolicy.sxp.ep.provider.api.EPPolicyTemplateProvider;
  24 import org.opendaylight.groupbasedpolicy.util.IidFactory;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.common.rev140421.Description;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.common.rev140421.EndpointGroupId;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.common.rev140421.Name;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.policy.rev140421.tenants.tenant.policy.EndpointGroup;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.policy.rev140421.tenants.tenant.policy.EndpointGroupBuilder;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.config.groupbasedpolicy.sxp.integration.sxp.ep.provider.model.rev160302.SxpEpMapper;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.config.groupbasedpolicy.sxp.integration.sxp.ep.provider.model.rev160302.sxp.ep.mapper.EndpointPolicyTemplateBySgt;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.config.groupbasedpolicy.sxp.integration.sxp.ep.provider.model.rev160302.sxp.ep.mapper.EndpointPolicyTemplateBySgtKey;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.sxp.database.rev160308.Sgt;
  34 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  35 import org.slf4j.Logger;
  36 import org.slf4j.LoggerFactory;
  37
  38 /**
  39  * Purpose: add template provider fallback to {@link EPPolicyTemplateDaoImpl}
  40  */
  41 public class EPPolicyTemplateDaoFacadeImpl implements EPPolicyTemplateDaoFacade {
  42
  43     private static final Logger LOG = LoggerFactory.getLogger(EPPolicyTemplateDaoFacadeImpl.class);
  44
  45     private final EPPolicyTemplateDaoImpl epPolicyTemplateDao;
  46     private final DataBroker dataBroker;
  47
  48     private EPPolicyTemplateProvider templateProvider;
  49
  50     public EPPolicyTemplateDaoFacadeImpl(final DataBroker dataBroker, final EPPolicyTemplateDaoImpl epPolicyTemplateDao) {
  51         this.dataBroker = dataBroker;
  52         this.epPolicyTemplateDao = epPolicyTemplateDao;
  53     }
  54
  55     @Override
  56     public void setTemplateProvider(final EPPolicyTemplateProvider templateProvider) {
  57         this.templateProvider = templateProvider;
  58     }
  59
  60
  61     @Override
  62     public ListenableFuture<Optional<EndpointPolicyTemplateBySgt>> read(@Nonnull final Sgt key) {
  63         // read from delegate
  64         final ListenableFuture<Optional<EndpointPolicyTemplateBySgt>> templateFu = epPolicyTemplateDao.read(key);
  65
  66         // involve fallback if template is absent
  67         return Futures.transform(templateFu, new AsyncFunction<Optional<EndpointPolicyTemplateBySgt>, Optional<EndpointPolicyTemplateBySgt>>() {
  68             @Override
  69             public ListenableFuture<Optional<EndpointPolicyTemplateBySgt>> apply(
  70                     @Nonnull final Optional<EndpointPolicyTemplateBySgt> templateOpt) throws Exception {
  71
  72                 return templateOpt.transform(template -> Futures.immediateFuture(templateOpt))
  73                         // failed to read template -> invoke fallback if available
  74                         .or(() -> java.util.Optional.ofNullable(templateProvider)
  75                                 .flatMap(provider -> templateProvider.provideTemplate(key))
  76                                 .map(template -> storeTemplateAndEpg(template))
  77                                 .orElse(Futures.immediateFuture(Optional.absent()))
  78                         );
  79             }
  80         });
  81     }
  82
  83     private ListenableFuture<Optional<EndpointPolicyTemplateBySgt>> storeTemplateAndEpg(final EndpointPolicyTemplateBySgt template) {
  84         // store EPG (presume that it does not exist)
  85         final Sgt sgtValue = template.getSgt();
  86         LOG.trace("storing EPGs for generated epPolicyTemplate: {} [{}]",
  87                 sgtValue.getValue(), template.getEndpointGroups().size());
  88         final WriteTransaction wTx = dataBroker.newWriteOnlyTransaction();
  89
  90         boolean createParent = true;
  91         for (EndpointGroupId epgId : template.getEndpointGroups()) {
  92             final InstanceIdentifier<EndpointGroup> epgPath = IidFactory.endpointGroupIid(template.getTenant(), epgId);
  93             final EndpointGroup epg = new EndpointGroupBuilder()
  94                     .setId(epgId)
  95                     .setDescription(new Description("imported from ISE for sgt=" + sgtValue.getValue()))
  96                     .setName(new Name(String.format("%s_ISE_SGT_%d", epgId.getValue(), sgtValue.getValue())))
  97                     .build();
  98             wTx.put(LogicalDatastoreType.CONFIGURATION, epgPath, epg, createParent);
  99             createParent = false;
 100         }
 101
 102         // store ep-policy-template
 103         LOG.trace("storing generated epPolicyTemplate: {}", sgtValue.getValue());
 104         final InstanceIdentifier<EndpointPolicyTemplateBySgt> epPolicyTemplatePath = InstanceIdentifier
 105                 .create(SxpEpMapper.class)
 106                 .child(EndpointPolicyTemplateBySgt.class, new EndpointPolicyTemplateBySgtKey(sgtValue));
 107         wTx.put(LogicalDatastoreType.CONFIGURATION, epPolicyTemplatePath, template, true);
 108
 109         return Futures.transform(wTx.submit(), createStoreOutcomeHandler(template));
 110     }
 111
 112     private Function<Void, Optional<EndpointPolicyTemplateBySgt>> createStoreOutcomeHandler(final EndpointPolicyTemplateBySgt template) {
 113         return new Function<Void, Optional<EndpointPolicyTemplateBySgt>>() {
 114             @Nullable
 115             @Override
 116             public Optional<EndpointPolicyTemplateBySgt> apply(@Nullable final Void aVoid) {
 117                 return Optional.of(template);
 118             }
 119         };
 120     }
 121
 122     @Override
 123     public Collection<EndpointPolicyTemplateBySgt> readBy(@Nonnull final EpPolicyTemplateValueKey specialKey) {
 124         return epPolicyTemplateDao.readBy(specialKey);
 125     }
 126 }