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/*
* ================================================================================
* Copyright (c) 2018 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.dcae.analytics.tca.web.validation;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;
import org.onap.dcae.analytics.model.configbindingservice.BaseConfigBindingServiceProperties.PubSubCommonDetails;
import org.onap.dcae.analytics.model.configbindingservice.BaseConfigBindingServiceProperties.PublisherDetails;
import org.onap.dcae.analytics.model.configbindingservice.BaseConfigBindingServiceProperties.SubscriberDetails;
import org.onap.dcae.analytics.model.configbindingservice.ConfigBindingServiceConstants;
import org.onap.dcae.analytics.tca.web.TcaAppProperties;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.lang.Nullable;
import org.springframework.validation.Errors;
import org.springframework.validation.Validator;
/**
* Validator for {@link TcaAppProperties}. This validator is used by spring at start up time to validate
* TCA Application properties
*
* @author Rajiv Singla
*/
public class TcaAppPropertiesValidator implements Validator {
private static final Logger logger = LoggerFactory.getLogger(TcaAppPropertiesValidator.class);
@Override
public boolean supports(final Class<?> type) {
return type == TcaAppProperties.class;
}
@Override
public void validate(@Nullable final Object props, final Errors errors) {
if (props == null) {
errors.rejectValue(ConfigBindingServiceConstants.CONFIG_BINDING_SERVICE_PROPERTIES_KEY,
"TCA App Properties are not present");
return;
}
final TcaAppProperties tcaAppProperties = (TcaAppProperties) props;
logger.info("Validating TCA App Properties: {}", tcaAppProperties);
final Map<String, PublisherDetails> streamsPublishes = tcaAppProperties.getStreamsPublishes();
final Map<String, SubscriberDetails> streamsSubscribes = tcaAppProperties.getStreamsSubscribes();
// Validate that stream publishes has at least 1 publisher and subscriber
if (!validatePubSubArePresent(errors, streamsPublishes, streamsSubscribes)) {
return;
}
// Validate that streams publishes and subscribes has at least one message router
List<? super PubSubCommonDetails> pubSubMRCommonDetails =
validatePubSubHasMRDetails(errors, streamsPublishes, streamsSubscribes);
if (pubSubMRCommonDetails.isEmpty()) {
return;
}
//Confirm each message router has dmaap info and their url is present and valid
validateMRProperties(errors, pubSubMRCommonDetails);
// validated aai properties
validateAAIProperties(errors, tcaAppProperties.getTca().getAai());
logger.info("Validation of TCA App Properties completed successfully");
}
private void validateAAIProperties(final Errors errors, final TcaAppProperties.Aai aai) {
new ConfigPropertiesAaiValidator().validate(aai, errors);
}
private void validateMRProperties(final Errors errors,
final List<? super PubSubCommonDetails> pubSubMRCommonDetails) {
for (Object pubSubMRCommonDetail : pubSubMRCommonDetails) {
final PubSubCommonDetails mrDetails = (PubSubCommonDetails) pubSubMRCommonDetail;
if (mrDetails.getDmaapInfo() == null || mrDetails.getDmaapInfo().getTopicUrl() == null) {
errors.rejectValue("dmaap_info",
"dmaap_info url not present for MR configuration properties: " + mrDetails);
}
if (mrDetails.getDmaapInfo() != null && mrDetails.getDmaapInfo().getTopicUrl() != null
&& !isURLValid(mrDetails.getDmaapInfo().getTopicUrl())) {
errors.rejectValue("topic_url",
"Invalid MR Topic URL in configuration properties:" + mrDetails);
}
if (mrDetails.getProxyUrl() != null && !mrDetails.getProxyUrl().trim().isEmpty()
&& !isURLValid(mrDetails.getProxyUrl())) {
errors.rejectValue("proxy_url",
"Invalid Proxy url in configuration properties:" + mrDetails);
}
}
}
private List<? super PubSubCommonDetails> validatePubSubHasMRDetails(
final Errors errors,
final Map<String, PublisherDetails> streamsPublishes,
final Map<String, SubscriberDetails> streamsSubscribes) {
final List<Map.Entry<String, PublisherDetails>> messageRouterPublishers =
streamsPublishes.entrySet().stream()
.filter(ConfigBindingServiceConstants.MESSAGE_ROUTER_PREDICATE)
.collect(Collectors.toList());
if (messageRouterPublishers.isEmpty()) {
errors.rejectValue("stream_publishes",
"Stream publishes must contain at least 1 message router publisher");
}
final List<Map.Entry<String, SubscriberDetails>> messageRouterSubscribers =
streamsSubscribes.entrySet().stream()
.filter(ConfigBindingServiceConstants.MESSAGE_ROUTER_PREDICATE)
.collect(Collectors.toList());
if (messageRouterSubscribers.isEmpty()) {
errors.rejectValue("stream_subscribes",
"Stream subscriber must contain at least 1 message router subscriber");
}
// create common pub sub MR list
final List<? super PubSubCommonDetails> pubSubMRCommonDetails = new LinkedList<>();
pubSubMRCommonDetails.addAll(messageRouterPublishers.stream()
.map(Map.Entry::getValue).collect(Collectors.toList()));
pubSubMRCommonDetails.addAll(messageRouterSubscribers.stream()
.map(Map.Entry::getValue).collect(Collectors.toList())
);
return pubSubMRCommonDetails;
}
private boolean validatePubSubArePresent(final Errors errors,
final Map<String, PublisherDetails> streamsPublishes,
final Map<String, SubscriberDetails>
streamsSubscribes) {
if (streamsPublishes.isEmpty()) {
errors.rejectValue("streams_publishes", "Streams publishes must define at least 1 publisher");
return false;
}
if (streamsSubscribes.isEmpty()) {
errors.rejectValue("streams_subscribes", "Streams subscribes must define at least 1 subscriber");
return false;
}
return true;
}
private static boolean isURLValid(final String urlString) {
try {
new URL(urlString);
return true;
} catch (MalformedURLException ex) {
return false;
}
}
}
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