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/*
* ===============================LICENSE_START======================================
* dcae-analytics
* ================================================================================
* Copyright © 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.openecomp.dcae.apod.analytics.tca.processor;
import org.apache.commons.lang3.StringUtils;
import org.openecomp.dcae.apod.analytics.common.exception.MessageProcessingException;
import org.openecomp.dcae.apod.analytics.common.service.processor.AbstractMessageProcessor;
import org.openecomp.dcae.apod.analytics.model.domain.cef.EventListener;
import org.openecomp.dcae.apod.analytics.tca.utils.TCAUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
/**
*<p>
* Processor that converts incoming presumed JSON string CEF message to {@link EventListener} object
* <br>
* Pre Conditions: None
*</p>
*
* @author Rajiv Singla . Creation Date: 11/5/2016.
*/
public class TCACEFJsonProcessor extends AbstractMessageProcessor<TCACEFProcessorContext> {
private static final long serialVersionUID = 1L;
private static final Logger LOG = LoggerFactory.getLogger(TCACEFJsonProcessor.class);
@Override
public String getProcessorDescription() {
return "Converts incoming TCA CEF Message to Event Listener object";
}
@Override
public TCACEFProcessorContext processMessage(TCACEFProcessorContext processorContext) {
final String cefMessage = processorContext.getMessage();
// If CEF Message is null then processor should stop processing
if (cefMessage == null) {
String errorMessage = "Null CEF message cannot be converted to CEF Event Listener Object";
throw new MessageProcessingException(errorMessage, LOG, new IllegalArgumentException(errorMessage));
}
// If CEF Message is blank then processor stop processing
if (StringUtils.isBlank(cefMessage)) {
setTerminatingProcessingMessage("Blank CEF message cannot be converted to CEF Event Listener Object",
processorContext);
return processorContext;
}
// trim cef message
final String trimmedCEFMessage = cefMessage.trim();
// if message does not start with curly brace and ends with curly brace, it is not a valid cef message
// processor will stop processing
if (!(trimmedCEFMessage.startsWith("{") && trimmedCEFMessage.endsWith("}"))) {
setTerminatingProcessingMessage("CEF Message must start with curly brace and must end with curly brace",
processorContext);
return processorContext;
}
// try parsing the cef message
try {
final EventListener eventListener = TCAUtils.readValue(trimmedCEFMessage, EventListener.class);
setFinishedProcessingMessage("CEF JSON to Event Listener Conversion Successful", processorContext);
// set new Event Listener in the Processor Context
processorContext.setCEFEventListener(eventListener);
return processorContext;
} catch (IOException e) {
final String errorMessage = String.format("Parsing Failed for CEF Message: %s, Error: %s", cefMessage, e);
// If parsing fails throw an exception
throw new MessageProcessingException(errorMessage, LOG, e);
}
}
}
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