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/*-
* ============LICENSE_START=======================================================
* ONAP : CCSDK.apps
* ================================================================================
* Copyright (C) 2018 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Modifications Copyright (C) 2018 IBM.
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ============LICENSE_END=========================================================
*/
package org.onap.ccsdk.apps.ms.neng.service.extinf.impl;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.net.URI;
import java.security.cert.X509Certificate;
import java.util.List;
import java.util.Map;
import java.util.logging.Logger;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.TrustStrategy;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.onap.ccsdk.apps.ms.neng.core.exceptions.NengException;
import org.onap.ccsdk.apps.ms.neng.core.policy.PolicyFinder;
import org.onap.ccsdk.apps.ms.neng.core.resource.model.GetConfigRequest;
import org.onap.ccsdk.apps.ms.neng.core.resource.model.GetConfigResponse;
import org.onap.ccsdk.apps.ms.neng.core.rs.interceptors.PolicyManagerAuthorizationInterceptor;
import org.onap.ccsdk.apps.ms.neng.extinf.props.PolicyManagerProps;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.web.client.RestTemplateBuilder;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.RequestEntity;
import org.springframework.http.ResponseEntity;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
import org.springframework.stereotype.Component;
import org.springframework.web.client.HttpStatusCodeException;
import org.springframework.web.client.RestTemplate;
/**
* Finds policies from policy manager.
*/
@Component
@Qualifier("PolicyFinderServiceImpl")
public class PolicyFinderServiceImpl implements PolicyFinder {
private static Logger log = Logger.getLogger(PolicyFinderServiceImpl.class.getName());
@Autowired PolicyManagerProps policManProps;
@Autowired @Qualifier("policyMgrRestTempBuilder") RestTemplateBuilder policyMgrRestTempBuilder;
@Autowired PolicyManagerAuthorizationInterceptor authInt;
RestTemplate restTemplate;
/**
* Find policy with the given name from policy manager.
*/
@Override
public Map<String, Object> findPolicy(String policyName) throws Exception {
Object response = getConfig(policyName).getResponse();
if (response instanceof List) {
@SuppressWarnings("unchecked")
List<Map<String, Object>> policyList = (List<Map<String, Object>>) response;
return ((!policyList.isEmpty()) ? policyList.get(0) : null);
} else {
return null;
}
}
GetConfigResponse getConfig(String policyName) throws Exception {
GetConfigRequest getConfigRequest = new GetConfigRequest();
getConfigRequest.setPolicyName(policyName);
return (makeOutboundCall(getConfigRequest, GetConfigResponse.class));
}
<T, R> GetConfigResponse makeOutboundCall(T request, Class<R> response) throws Exception {
log.info("Policy Manager - " + policManProps.getUrl());
RequestEntity<T> re = RequestEntity.post(new URI(policManProps.getUrl()))
.accept(MediaType.APPLICATION_JSON).contentType(MediaType.APPLICATION_JSON).body(request);
try {
ResponseEntity<Object> resp = getRestTemplate().exchange(re, Object.class);
if (HttpStatus.OK.equals(resp.getStatusCode())) {
ObjectMapper objectmapper = new ObjectMapper();
log.info(objectmapper.writeValueAsString(resp.getBody()));
//System.out.println(objectmapper.writeValueAsString(resp.getBody()));
List<Map<Object, Object>> respObj = objectmapper.readValue(
objectmapper.writeValueAsString(resp.getBody()),
new TypeReference<List<Map<Object, Object>>>() {});
transformConfigObject(objectmapper, respObj);
GetConfigResponse getConfigResp = new GetConfigResponse();
getConfigResp.setResponse(respObj);
return getConfigResp;
}
} catch (HttpStatusCodeException e) {
handleError(e);
}
throw new NengException("Error while retrieving policy from policy manager.");
}
void handleError(HttpStatusCodeException e) throws Exception {
String respString = e.getResponseBodyAsString();
log.info(respString);
if (e.getStatusText() != null) {
log.info(e.getStatusText());
}
if (e.getResponseHeaders() != null && e.getResponseHeaders().toSingleValueMap() != null) {
log.info(e.getResponseHeaders().toSingleValueMap().toString());
}
if (HttpStatus.NOT_FOUND.equals(e.getStatusCode()) && (respString != null && respString.contains(""))) {
throw new NengException("Policy not found in policy manager.");
}
throw new NengException("Error while retrieving policy from policy manager.");
}
/**
* Transforms the 'config' element (which is received as a JSON string) to a map like a JSON object.
*/
void transformConfigObject(ObjectMapper objectmapper, List<Map<Object, Object>> respObj) throws Exception {
Object configElement = respObj.get(0).get("config");
if (configElement instanceof String) {
Map<Object, Object> obj = objectmapper.readValue(configElement.toString(),
new TypeReference<Map<Object, Object>>() {});
respObj.get(0).put("config", obj);
}
}
RestTemplate getRestTemplate() throws Exception {
if (restTemplate != null) {
return restTemplate;
}
TrustStrategy acceptingTrustStrategy = (X509Certificate[] chain, String authType) -> true;
SSLContext sslContext = org.apache.http.ssl.SSLContexts.custom()
.loadTrustMaterial(null, acceptingTrustStrategy).build();
HostnameVerifier verifier = (String arg0, SSLSession arg1) -> true;
SSLConnectionSocketFactory csf = new SSLConnectionSocketFactory(sslContext, verifier);
CloseableHttpClient httpClient = HttpClients.custom().setSSLSocketFactory(csf).build();
HttpComponentsClientHttpRequestFactory requestFactory = new HttpComponentsClientHttpRequestFactory();
requestFactory.setHttpClient(httpClient);
restTemplate = new RestTemplate(requestFactory);
restTemplate.getInterceptors().add(getAuthInt());
return restTemplate;
}
RestTemplateBuilder getPolicyMgrRestTempBuilder() {
return policyMgrRestTempBuilder;
}
void setPolicyMgrRestTempBuilder(RestTemplateBuilder policyMgrRestTempBuilder) {
this.policyMgrRestTempBuilder = policyMgrRestTempBuilder;
}
PolicyManagerAuthorizationInterceptor getAuthInt() {
return authInt;
}
void setAuthInt(PolicyManagerAuthorizationInterceptor authInt) {
this.authInt = authInt;
}
}
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