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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.core.util.function.calculation;
import java.util.function.Function;
import org.onap.dcae.analytics.tca.core.service.TcaExecutionContext;
import org.onap.dcae.analytics.tca.core.service.TcaProcessingContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Functional interface which all TCA calculation functions should implement
*
* @author Rajiv Singla
*/
@FunctionalInterface
public interface TcaCalculationFunction extends Function<TcaExecutionContext, TcaExecutionContext> {
Logger logger = LoggerFactory.getLogger(TcaCalculationFunction.class);
TcaExecutionContext calculate(TcaExecutionContext tcaExecutionContext);
default TcaExecutionContext preCalculation(TcaExecutionContext tcaExecutionContext) {
// do nothing
return tcaExecutionContext;
}
default TcaExecutionContext postCalculation(TcaExecutionContext tcaExecutionContext) {
// do nothing
return tcaExecutionContext;
}
@Override
default TcaExecutionContext apply(TcaExecutionContext tcaExecutionContext) {
// triggers pre calculate, calculate nad post calculate
return postCalculation(calculate(preCalculation(tcaExecutionContext)));
}
/**
* Updates TCA Processing context with early terminating message or error message
*
* @param terminatingMessage terminating message to be set in processing context
* @param tcaExecutionContext current tca execution context
* @param isErrorMessage specifies if terminating message is an error message
*
* @return updated tca execution context with early termination or error message and continue processing flag as
* false
*/
default TcaExecutionContext setTerminatingMessage(final String terminatingMessage,
final TcaExecutionContext tcaExecutionContext,
final boolean isErrorMessage) {
final TcaProcessingContext tcaProcessingContext = tcaExecutionContext.getTcaProcessingContext();
if (isErrorMessage) {
logger.error("Request Id: {}. Error Message: {}", tcaExecutionContext.getRequestId(), terminatingMessage);
tcaProcessingContext.setErrorMessage(terminatingMessage);
} else {
logger.debug("Request Id: {}. Early Termination Message: {}", tcaExecutionContext.getRequestId(),
terminatingMessage);
tcaProcessingContext.setEarlyTerminationMessage(terminatingMessage);
}
tcaProcessingContext.setContinueProcessing(false);
return tcaExecutionContext;
}
}
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