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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2019-2021 AT&T Intellectual Property. All rights reserved.
* Modifications Copyright (C) 2023 Nordix Foundation.
* ================================================================================
* 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.policy.pdp.xacml.application.common.operationshistory;
import com.att.research.xacml.api.XACML3;
import com.att.research.xacml.api.pip.PIPException;
import com.att.research.xacml.api.pip.PIPFinder;
import com.att.research.xacml.api.pip.PIPRequest;
import com.att.research.xacml.api.pip.PIPResponse;
import com.att.research.xacml.std.pip.StdMutablePIPResponse;
import com.att.research.xacml.std.pip.StdPIPResponse;
import com.google.common.base.Strings;
import java.sql.Timestamp;
import java.time.Instant;
import java.time.temporal.ChronoUnit;
import java.util.Arrays;
import java.util.Collection;
import java.util.Objects;
import org.onap.policy.pdp.xacml.application.common.ToscaDictionary;
import org.onap.policy.pdp.xacml.application.common.std.StdOnapPip;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class CountRecentOperationsPip extends StdOnapPip {
public static final String ISSUER_NAME = "count-recent-operations";
private static final Logger logger = LoggerFactory.getLogger(CountRecentOperationsPip.class);
public CountRecentOperationsPip() {
super();
this.issuer = ISSUER_NAME;
}
@Override
public Collection<PIPRequest> attributesRequired() {
return Arrays.asList(PIP_REQUEST_ACTOR, PIP_REQUEST_RECIPE, PIP_REQUEST_TARGET);
}
/**
* getAttributes.
*
* @param pipRequest the request
* @param pipFinder the pip finder
* @return PIPResponse
*/
@Override
public PIPResponse getAttributes(PIPRequest pipRequest, PIPFinder pipFinder) throws PIPException {
if (this.shutdown) {
throw new PIPException("Engine is shutdown");
}
logger.debug("getAttributes requesting attribute {} of type {} for issuer {}",
pipRequest.getAttributeId(), pipRequest.getDataTypeId(), pipRequest.getIssuer());
//
// Determine if the issuer is correct
//
if (Strings.isNullOrEmpty(pipRequest.getIssuer())) {
logger.debug("issuer is null - returning empty response");
//
// We only respond to ourselves as the issuer
//
return StdPIPResponse.PIP_RESPONSE_EMPTY;
}
if (!pipRequest.getIssuer().startsWith(ToscaDictionary.GUARD_ISSUER_PREFIX)) {
logger.debug("Issuer does not start with guard");
//
// We only respond to ourselves as the issuer
//
return StdPIPResponse.PIP_RESPONSE_EMPTY;
}
//
// Parse out the issuer which denotes the time window
// Eg: any-prefix:tw:10:minute
//
String[] s1 = pipRequest.getIssuer().split("tw:");
String[] s2 = s1[1].split(":");
var timeWindowVal = Integer.parseInt(s2[0]);
String timeWindowScale = s2[1];
//
// Grab other attribute values
//
String actor = getAttribute(pipFinder, PIP_REQUEST_ACTOR);
String operation = getAttribute(pipFinder, PIP_REQUEST_RECIPE);
String target = getAttribute(pipFinder, PIP_REQUEST_TARGET);
String timeWindow = timeWindowVal + " " + timeWindowScale;
logger.info("Going to query DB about: actor {} operation {} target {} time window {}",
actor, operation, target, timeWindow);
//
// Sanity check
//
if (actor == null || operation == null || target == null) {
//
// See if we have all the values
//
logger.error("missing attributes return empty");
return StdPIPResponse.PIP_RESPONSE_EMPTY;
}
//
// Ok do the database query
//
long operationCount = doDatabaseQuery(actor, operation, target, timeWindowVal, timeWindowScale);
//
// Create and return PipResponse
//
var pipResponse = new StdMutablePIPResponse();
this.addLongAttribute(pipResponse,
XACML3.ID_ATTRIBUTE_CATEGORY_RESOURCE,
ToscaDictionary.ID_RESOURCE_GUARD_OPERATIONCOUNT,
operationCount,
pipRequest);
return new StdPIPResponse(pipResponse);
}
private long doDatabaseQuery(String actor, String operation, String target, int timeWindowVal,
String timeWindowScale) {
logger.info("Querying operations history for {} {} {} {} {}",
actor, operation, target, timeWindowVal, timeWindowScale);
//
// Only can query if we have an EntityManager
//
if (em == null) {
logger.error("No EntityManager available");
return -1;
}
//
// Do the query
//
try {
//
// We are expecting a single result
//
return em.createQuery("select count(e) from OperationsHistory e"
+ " where e.outcome<>'Failure_Guard'"
+ " and e.actor= ?1"
+ " and e.operation= ?2"
+ " and e.target= ?3"
+ " and e.endtime between"
+ " ?4 and CURRENT_TIMESTAMP",
Long.class)
.setParameter(1, actor)
.setParameter(2, operation)
.setParameter(3, target)
.setParameter(4, Timestamp.from(Instant.now()
.minus(timeWindowVal, Objects.requireNonNull(stringToChronoUnit(timeWindowScale)))))
.getSingleResult();
} catch (Exception e) {
logger.error("Typed query failed ", e);
return -1;
}
}
private ChronoUnit stringToChronoUnit(String scale) {
//
// Compute the time window
//
switch (scale.toLowerCase()) {
case "second":
return ChronoUnit.SECONDS;
case "minute":
return ChronoUnit.MINUTES;
case "hour":
return ChronoUnit.HOURS;
case "day":
return ChronoUnit.DAYS;
case "week":
return ChronoUnit.WEEKS;
case "month":
return ChronoUnit.MONTHS;
case "year":
return ChronoUnit.YEARS;
default:
//
// Unsupported
//
logger.error("Unsupported time window scale value {}", scale);
}
return null;
}
}
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