2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright (C) 2020 AT&T Intellectual Property. All rights
7 * ================================================================================
8 * Licensed under the Apache License, Version 2.0 (the "License");
9 * you may not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
12 * http://www.apache.org/licenses/LICENSE-2.0
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 * ============LICENSE_END============================================
20 * ===================================================================
24 package org.onap.clamp.clds.client;
26 import com.att.eelf.configuration.EELFLogger;
27 import com.att.eelf.configuration.EELFManager;
29 import org.apache.camel.CamelContext;
30 import org.apache.camel.Exchange;
31 import org.apache.camel.builder.ExchangeBuilder;
32 import org.onap.clamp.clds.config.ClampProperties;
33 import org.onap.clamp.clds.sdc.controller.installer.BlueprintMicroService;
34 import org.onap.clamp.loop.template.PolicyModel;
35 import org.onap.clamp.loop.template.PolicyModelId;
36 import org.onap.clamp.loop.template.PolicyModelsRepository;
37 import org.springframework.beans.factory.annotation.Autowired;
38 import org.springframework.stereotype.Component;
39 import org.springframework.transaction.annotation.Propagation;
40 import org.springframework.transaction.annotation.Transactional;
43 * The class implements the communication with the Policy Engine to retrieve
44 * policy models (tosca). It mainly delegates the physical calls to Camel
49 public class PolicyEngineServices {
50 private final CamelContext camelContext;
52 private final PolicyModelsRepository policyModelsRepository;
54 private static final EELFLogger logger = EELFManager.getInstance().getLogger(PolicyEngineServices.class);
55 private static final EELFLogger auditLogger = EELFManager.getInstance().getAuditLogger();
56 private static final EELFLogger metricsLogger = EELFManager.getInstance().getMetricsLogger();
57 private static int retryInterval = 0;
58 private static int retryLimit = 1;
60 public static final String POLICY_RETRY_INTERVAL = "policy.retry.interval";
61 public static final String POLICY_RETRY_LIMIT = "policy.retry.limit";
64 public PolicyEngineServices(CamelContext camelContext, ClampProperties refProp,
65 PolicyModelsRepository policyModelsRepository) {
66 this.camelContext = camelContext;
67 this.policyModelsRepository = policyModelsRepository;
68 if (refProp.getStringValue(POLICY_RETRY_LIMIT) != null) {
69 retryLimit = Integer.valueOf(refProp.getStringValue(POLICY_RETRY_LIMIT));
71 if (refProp.getStringValue(POLICY_RETRY_INTERVAL) != null) {
72 retryInterval = Integer.valueOf(refProp.getStringValue(POLICY_RETRY_INTERVAL));
76 public PolicyModel createPolicyModelFromPolicyEngine(String policyType, String policyVersion) {
77 return new PolicyModel(policyType, this.downloadOnePolicy(policyType, policyVersion), policyVersion);
80 public PolicyModel createPolicyModelFromPolicyEngine(BlueprintMicroService microService) {
81 return createPolicyModelFromPolicyEngine(microService.getModelType(), microService.getModelVersion());
84 @Transactional(propagation = Propagation.REQUIRES_NEW)
85 public void createPolicyInDbIfNeeded(PolicyModel policyModel) {
86 if (!policyModelsRepository
87 .existsById(new PolicyModelId(policyModel.getPolicyModelType(), policyModel.getVersion()))) {
88 policyModelsRepository.save(policyModel);
93 * This method can be used to download all policy types + data types defined in
96 * @return A yaml containing all policy Types and all data types
97 * @throws InterruptedException In case of issue when sleeping during the retry
99 public String downloadAllPolicies() {
100 return callCamelRoute(ExchangeBuilder.anExchange(camelContext).build(), "direct:get-all-policy-models");
104 * This method can be used to download a policy tosca model on the engine.
106 * @param policyType The policy type (id)
107 * @param policyVersion The policy version
108 * @return A string with the whole policy tosca model
109 * @throws InterruptedException In case of issue when sleeping during the retry
111 public String downloadOnePolicy(String policyType, String policyVersion) {
112 return callCamelRoute(ExchangeBuilder.anExchange(camelContext).withProperty("policyModelName", policyType)
113 .withProperty("policyModelVersion", policyVersion).build(), "direct:get-policy-model");
116 private String callCamelRoute(Exchange exchange, String camelFlow) {
117 for (int i = 0; i < retryLimit; i++) {
118 Exchange exchangeResponse = camelContext.createProducerTemplate().send(camelFlow, exchange);
119 if (Integer.valueOf(200).equals(exchangeResponse.getIn().getHeader("CamelHttpResponseCode"))) {
120 return (String) exchangeResponse.getIn().getBody();
122 logger.info("Policy query " + retryInterval + "ms before retrying ...");
123 // wait for a while and try to connect to DCAE again
125 Thread.sleep(retryInterval);
126 } catch (InterruptedException e) {
127 Thread.currentThread().interrupt();