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/*-
* ============LICENSE_START=======================================================
* ONAP-PAP-REST
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.policy.pap.xacml.rest.service;
import java.util.HashSet;
import java.util.Set;
import javax.persistence.EntityManager;
import javax.servlet.http.HttpServletResponse;
import org.json.JSONObject;
import org.onap.policy.common.logging.eelf.MessageCodes;
import org.onap.policy.common.logging.eelf.PolicyLogger;
import org.onap.policy.pap.xacml.rest.XACMLPapServlet;
import org.onap.policy.xacml.api.XACMLErrorConstants;
import org.onap.policy.xacml.api.pap.OnapPDPGroup;
import com.att.research.xacml.api.pap.PDPPolicy;
public class MetricService {
private static String errorMsg = "error";
/*
* This is a private constructor
* */
private MetricService() {
}
public static void doGetPolicyMetrics(HttpServletResponse response) {
Set<OnapPDPGroup> groups = new HashSet<>();
try {
//get the count of policies on the PDP
if (XACMLPapServlet.getPAPEngine() != null) {
groups = XACMLPapServlet.getPAPEngine().getOnapPDPGroups();
}
int pdpCount = 0;
for (OnapPDPGroup group : groups) {
Set<PDPPolicy> policies = group.getPolicies();
pdpCount += policies.size();
}
//get the count of policies on the PAP
EntityManager em = null;
if (XACMLPapServlet.getEmf() != null) {
em = XACMLPapServlet.getEmf().createEntityManager();
}
if (em == null) {
PolicyLogger.error(MessageCodes.ERROR_DATA_ISSUE +
" Error creating entity manager with persistence unit: " +
XACMLPapServlet.getPersistenceUnit());
response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
response.addHeader(errorMsg, "Error creating entity manager with persistence unit");
return;
}
int papCount = ((Number) em.createNamedQuery("PolicyVersion.findAllCount").getSingleResult()).intValue();
em.close();
int totalCount = pdpCount + papCount;
//create json string for API response
JSONObject json = new JSONObject();
json.put("papCount", papCount);
json.put("pdpCount", pdpCount);
json.put("totalCount", totalCount);
if (pdpCount > 0 && papCount > 0 && totalCount > 0) {
PolicyLogger
.info("Metrics have been found on the Policy Engine for the number of policies on the PAP and" +
" PDP.");
response.setStatus(HttpServletResponse.SC_OK);
response.addHeader("successMapKey", "success");
response.addHeader("operation", "getMetrics");
response.addHeader("metrics", json.toString());
} else {
String message =
"The policy count on the PAP and PDP is 0. Please check the database and file system to " +
"correct this error.";
response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
response.addHeader(errorMsg, message);
}
} catch (Exception e) {
String message = XACMLErrorConstants.ERROR_DATA_ISSUE + " Error Querying the Database: " + e.getMessage();
PolicyLogger.error(MessageCodes.ERROR_DATA_ISSUE, e, "XACMLPapServlet", " Error Querying the Database.");
response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
response.addHeader(errorMsg, message);
}
}
}
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