gerrit.onap Code Review - policy/distribution.git/blob

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  *  Copyright (C) 2018 Ericsson. 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.distribution.forwarding.xacml.pdp;
  22
  23 import java.security.KeyManagementException;
  24 import java.security.NoSuchAlgorithmException;
  25 import java.util.Collection;
  26 import java.util.Collections;
  27 import javax.ws.rs.client.Entity;
  28 import javax.ws.rs.core.MediaType;
  29 import javax.ws.rs.core.Response;
  30 import org.onap.policy.api.PolicyParameters;
  31 import org.onap.policy.api.PushPolicyParameters;
  32 import org.onap.policy.common.endpoints.event.comm.bus.internal.BusTopicParams;
  33 import org.onap.policy.common.endpoints.http.client.HttpClient;
  34 import org.onap.policy.common.logging.flexlogger.FlexLogger;
  35 import org.onap.policy.common.logging.flexlogger.Logger;
  36 import org.onap.policy.common.parameters.ParameterService;
  37 import org.onap.policy.distribution.forwarding.PolicyForwarder;
  38 import org.onap.policy.distribution.forwarding.xacml.pdp.adapters.XacmlPdpOptimizationPolicyAdapter;
  39 import org.onap.policy.distribution.model.OptimizationPolicy;
  40 import org.onap.policy.distribution.model.Policy;
  41 import org.springframework.http.HttpStatus;
  42
  43 /**
  44  * Forwards policies to the XACML PDP.
  45  */
  46 public class XacmlPdpPolicyForwarder implements PolicyForwarder {
  47
  48     private static final Logger LOGGER = FlexLogger.getLogger(XacmlPdpPolicyForwarder.class);
  49     private static final String BASE_PATH = "pdp/api/";
  50
  51     private XacmlPdpPolicyForwarderParameterGroup configurationParameters = null;
  52
  53
  54     @Override
  55     public void forward(final Collection<Policy> policies) {
  56         for (Policy policy : policies) {
  57             forward(policy);
  58         }
  59     }
  60
  61     private void forward(Policy policy) {
  62         XacmlPdpPolicyAdapter<?> policyAdapter = getXacmlPdpPolicyAdapter(policy);
  63
  64         if (policyAdapter == null) {
  65             LOGGER.error("Cannot forward policy " + policy + ". Unsupported policy type "
  66                     + policy.getClass().getSimpleName());
  67             return;
  68         }
  69
  70         boolean policyCreated = createPolicy(policyAdapter);
  71         if (policyCreated) {
  72             pushPolicy(policyAdapter);
  73         }
  74     }
  75
  76     private XacmlPdpPolicyAdapter<?> getXacmlPdpPolicyAdapter(Policy policy) {
  77         if (policy instanceof OptimizationPolicy) {
  78             return new XacmlPdpOptimizationPolicyAdapter((OptimizationPolicy) policy);
  79         }
  80         return null;
  81     }
  82
  83     private boolean createPolicy(XacmlPdpPolicyAdapter<?> policyAdapter) {
  84         PolicyParameters policyParameters = policyAdapter.getAsPolicyParameters();
  85         Entity<PolicyParameters> entity = Entity.entity(policyParameters, MediaType.APPLICATION_JSON);
  86
  87         return invokeHttpClient(entity, "createPolicy", policyAdapter.getPolicy().getPolicyName());
  88     }
  89
  90     private boolean pushPolicy(XacmlPdpPolicyAdapter<?> policyAdapter) {
  91         PushPolicyParameters pushPolicyParameters =
  92                 policyAdapter.getAsPushPolicyParameters(configurationParameters.getPdpGroup());
  93         Entity<PushPolicyParameters> entity = Entity.entity(pushPolicyParameters, MediaType.APPLICATION_JSON);
  94
  95         return invokeHttpClient(entity, "pushPolicy", policyAdapter.getPolicy().getPolicyName());
  96     }
  97
  98     private boolean invokeHttpClient(final Entity<?> entity, final String method, final String policyName) {
  99
 100         try {
 101             Response response = getHttpClient().put(method, entity,
 102                     Collections.singletonMap("ClientAuth", configurationParameters.getClientAuth()));
 103
 104             if (response.getStatus() != HttpStatus.OK.value()) {
 105                 LOGGER.error(
 106                         "Invocation of method " + method + " failed for policy " + policyName + ". Response status: "
 107                                 + response.getStatus() + ", Response status info: " + response.getStatusInfo());
 108                 return false;
 109             }
 110         } catch (KeyManagementException | NoSuchAlgorithmException exception) {
 111             LOGGER.error("Invocation of method " + method + " failed for policy " + policyName
 112                     + " due to error opening Http client", exception);
 113             return false;
 114         }
 115         return true;
 116     }
 117
 118     private HttpClient getHttpClient() throws KeyManagementException, NoSuchAlgorithmException {
 119         boolean useHttps = configurationParameters.isUseHttps();
 120         String hostname = configurationParameters.getHostname();
 121         int port = configurationParameters.getPort();
 122         String userName = configurationParameters.getUserName();
 123         String password = configurationParameters.getPassword();
 124         boolean managed = configurationParameters.isManaged();
 125         BusTopicParams params = BusTopicParams.builder().clientName("SDC Dist").useHttps(useHttps).hostname(hostname)
 126                 .port(port).userName(userName).password(password).basePath(BASE_PATH).managed(managed).build();
 127         return HttpClient.factory.build(params);
 128     }
 129
 130     @Override
 131     public void configure(String parameterGroupName) {
 132         configurationParameters = ParameterService.get(parameterGroupName);
 133     }
 134
 135 }