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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2019 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.dcaegen2.services.pmmapper.filtering;
import lombok.NonNull;
import org.onap.dcaegen2.services.pmmapper.exceptions.*;
import org.onap.dcaegen2.services.pmmapper.model.Event;
import org.onap.dcaegen2.services.pmmapper.model.EventMetadata;
import org.onap.dcaegen2.services.pmmapper.model.MapperConfig;
import org.onap.dcaegen2.services.pmmapper.model.MeasFilterConfig;
import org.onap.dcaegen2.services.pmmapper.model.MeasFilterConfig.Filter;
import org.onap.dcaegen2.services.pmmapper.utils.DataRouterUtils;
import org.onap.logging.ref.slf4j.ONAPLogAdapter;
import org.slf4j.LoggerFactory;
import java.util.Arrays;
import java.util.List;
public class MetadataFilter {
private static final ONAPLogAdapter logger = new ONAPLogAdapter(LoggerFactory.getLogger(MetadataFilter.class));
MapperConfig config;
public MetadataFilter(MapperConfig config) {
this.config = config;
}
/**
* Filters events by their metadata against filter object in configuration
* @param event inbound event
*/
public boolean filter(@NonNull Event event) {
logger.unwrap().info("Filtering event metadata");
EventMetadata metadata = event.getMetadata();
MeasFilterConfig measFilterConfig = config.getFilterConfig();
List<MeasFilterConfig.Filter> filters = measFilterConfig.getFilters();
if(filters.isEmpty()) {
logger.unwrap().info("No filter specified in config: {}", filters);
return true;
}
for(Filter filter : filters) {
if(compareObjects(filter, metadata)) {
logger.unwrap().info("Metadata matches filter: {}", filter);
event.setFilter(filter);
return true;
} else {
logger.unwrap().debug("Metadata does not match filter: {}", filter);
}
}
logger.unwrap().info("Metadata does not match any filters, sending process event indicator to DR");
try {
DataRouterUtils.processEvent(config, event);
}catch (ProcessEventException exception) {
logger.unwrap().error("Process event failure", exception);
}
return false;
}
/**
* Compares event metadata against filter object
* @param filter filter object received from configuration
* @param metadata metadata from event
*/
private boolean compareObjects(Filter filter, EventMetadata metadata) {
List<Validator<Filter, EventMetadata>> validators = Arrays.asList(
new VendorValidator(),
new TypeValidator()
);
for(Validator<Filter, EventMetadata> validation : validators) {
if (! validation.validate(filter, metadata)) {
return false;
}
}
return true;
}
@FunctionalInterface
interface Validator<A, B> {
boolean validate(A filter, B metadata);
}
class VendorValidator implements Validator<Filter, EventMetadata> {
@Override
public boolean validate(Filter filter, EventMetadata metadata) {
return filter.getVendor().equals(metadata.getVendorName());
}
}
class TypeValidator implements Validator<Filter, EventMetadata> {
@Override
public boolean validate(Filter filter, EventMetadata metadata) {
return filter.getNfType().equals(metadata.getProductName());
}
}
}
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