main/src/main/java/org/onap/policy/pdpx/main/comm/XacmlPdpUpdatePublisher.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * Copyright (C) 2019-2021 AT&T Intellectual Property. All rights reserved.
   4  * ================================================================================
   5  * Licensed under the Apache License, Version 2.0 (the "License");
   6  * you may not use this file except in compliance with the License.
   7  * You may obtain a copy of the License at
   8  *
   9  *      http://www.apache.org/licenses/LICENSE-2.0
  10  *
  11  * Unless required by applicable law or agreed to in writing, software
  12  * distributed under the License is distributed on an "AS IS" BASIS,
  13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14  * See the License for the specific language governing permissions and
  15  * limitations under the License.
  16  *
  17  * SPDX-License-Identifier: Apache-2.0
  18  * ============LICENSE_END=========================================================
  19  */
  20
  21 package org.onap.policy.pdpx.main.comm;
  22
  23 import java.util.Collection;
  24 import java.util.Collections;
  25 import java.util.List;
  26 import java.util.Map;
  27 import java.util.Optional;
  28 import java.util.stream.Collectors;
  29 import lombok.AllArgsConstructor;
  30 import org.onap.policy.common.endpoints.event.comm.client.TopicSinkClient;
  31 import org.onap.policy.models.pdp.concepts.PdpStatus;
  32 import org.onap.policy.models.pdp.concepts.PdpUpdate;
  33 import org.onap.policy.models.tosca.authorative.concepts.ToscaConceptIdentifier;
  34 import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicy;
  35 import org.onap.policy.pdp.xacml.application.common.XacmlApplicationException;
  36 import org.onap.policy.pdp.xacml.application.common.XacmlPolicyUtils;
  37 import org.onap.policy.pdpx.main.XacmlState;
  38 import org.onap.policy.pdpx.main.rest.XacmlPdpApplicationManager;
  39 import org.onap.policy.pdpx.main.rest.XacmlPdpStatisticsManager;
  40 import org.slf4j.Logger;
  41 import org.slf4j.LoggerFactory;
  42
  43 @AllArgsConstructor
  44 public class XacmlPdpUpdatePublisher {
  45
  46     private static final Logger LOGGER = LoggerFactory.getLogger(XacmlPdpUpdatePublisher.class);
  47
  48     private final TopicSinkClient client;
  49     private final XacmlState state;
  50     private final XacmlPdpApplicationManager appManager;
  51
  52     /**
  53      * Handle the PDP Update message.
  54      *
  55      * @param message Incoming message
  56      */
  57     public void handlePdpUpdate(PdpUpdate message) {
  58
  59         // current data
  60         Map<ToscaConceptIdentifier, ToscaPolicy> deployedPolicies = policyToMap(appManager.getToscaPolicies().keySet());
  61
  62         // incoming data
  63         Map<ToscaConceptIdentifier, ToscaPolicy> toBeDeployedPolicies = policyToMap(message.getPoliciesToBeDeployed());
  64         List<ToscaConceptIdentifier> toBeUndeployedIds =
  65                         Optional.ofNullable(message.getPoliciesToBeUndeployed()).orElse(Collections.emptyList());
  66
  67         // Undeploy policies
  68         for (ToscaConceptIdentifier policyId: toBeUndeployedIds) {
  69             ToscaPolicy policy = deployedPolicies.get(policyId);
  70             if (policy == null) {
  71                 LOGGER.warn("attempt to undeploy policy that has not been previously deployed: {}", policyId);
  72             } else if (toBeDeployedPolicies.containsKey(policyId)) {
  73                 LOGGER.warn("not undeploying policy, as it also appears in the deployment list: {}", policyId);
  74             } else {
  75                 appManager.removeUndeployedPolicy(policy);
  76             }
  77         }
  78
  79         var errorMessage = new StringBuilder();
  80         // Deploy a policy
  81         // if deployed policies do not contain the incoming policy load it
  82         for (ToscaPolicy policy : toBeDeployedPolicies.values()) {
  83             if (!deployedPolicies.containsKey(policy.getIdentifier())) {
  84                 try {
  85                     appManager.loadDeployedPolicy(policy);
  86                 } catch (XacmlApplicationException e) {
  87                     // Failed to load policy, return error(s) to PAP
  88                     LOGGER.error("Failed to load policy: {}", policy, e);
  89                     errorMessage.append("Failed to load policy: " + policy + ": "
  90                             + e.getMessage() + XacmlPolicyUtils.LINE_SEPARATOR);
  91                 }
  92             }
  93         }
  94
  95         // update the policy count statistic
  96         var stats = XacmlPdpStatisticsManager.getCurrent();
  97         if (stats != null) {
  98             stats.setTotalPolicyCount(appManager.getPolicyCount());
  99         }
 100
 101         PdpStatus status = state.updateInternalState(message, errorMessage.toString());
 102         LOGGER.debug("Returning current deployed policies: {} ", status.getPolicies());
 103
 104         sendPdpUpdate(status);
 105     }
 106
 107     private Map<ToscaConceptIdentifier, ToscaPolicy> policyToMap(Collection<ToscaPolicy> policies) {
 108         if (policies == null) {
 109             return Collections.emptyMap();
 110         }
 111
 112         return policies.stream().collect(Collectors.toMap(ToscaPolicy::getIdentifier, policy -> policy));
 113     }
 114
 115     private void sendPdpUpdate(PdpStatus status) {
 116         // Send PdpStatus Change to PAP
 117         if (!client.send(status)) {
 118             LOGGER.error("failed to send to topic sink {}", client.getTopic());
 119         }
 120     }
 121 }