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KapuaDataConverter.java
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KapuaDataConverter.java
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/*******************************************************************************
* Copyright (c) 2016, 2020 Eurotech and/or its affiliates and others
*
* All rights reserved. This program and the accompanying materials are made
* available under the terms of the Eclipse Public License 2.0
* which is available at https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Eurotech - initial API and implementation
*******************************************************************************/
package org.eclipse.kapua.broker.core.converter;
import java.util.UUID;
import org.apache.camel.Converter;
import org.apache.camel.Exchange;
import org.apache.commons.lang3.StringUtils;
import org.eclipse.kapua.KapuaException;
import org.eclipse.kapua.broker.core.message.CamelKapuaMessage;
import org.eclipse.kapua.broker.core.plugin.ConnectorDescriptor.MessageType;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.codahale.metrics.Counter;
/**
* Kapua message converter used to convert data messages.
*
* @since 1.0
*/
public class KapuaDataConverter extends AbstractKapuaConverter {
public static final Logger logger = LoggerFactory.getLogger(KapuaDataConverter.class);
private Counter metricConverterDataMessage;
public KapuaDataConverter() {
super();
metricConverterDataMessage = METRICS_SERVICE.getCounter(ConverterMetrics.METRIC_MODULE_NAME, ConverterMetrics.METRIC_COMPONENT_NAME, ConverterMetrics.METRIC_KAPUA_MESSAGE, ConverterMetrics.METRIC_MESSAGES, ConverterMetrics.METRIC_DATA, ConverterMetrics.METRIC_COUNT);
}
/**
* Convert incoming message to a Kapua data message
*
* @param exchange
* @param value
* @return Message container that contains data message
* @throws KapuaException
* if incoming message does not contain a javax.jms.BytesMessage or an error during conversion occurred
*/
@Converter
public CamelKapuaMessage<?> convertToData(Exchange exchange, Object value) throws KapuaException {
metricConverterDataMessage.inc();
CamelKapuaMessage<?> message = convertTo(exchange, value, MessageType.DATA);
if (StringUtils.isEmpty(message.getDatastoreId())) {
message.setDatastoreId(UUID.randomUUID().toString());
}
return message;
}
@Converter
public CamelKapuaMessage<?> convertToDataOnException(Exchange exchange, Object value) throws KapuaException {
metricConverterDataMessage.inc();
// this converter may be used in different camel route step so may we already have a CamelKapuaMessage (depending on which step in the Camel route failed)
CamelKapuaMessage<?> message;
if (value instanceof CamelKapuaMessage<?>) {
message = (CamelKapuaMessage<?>) value;
} else {
message = convertTo(exchange, value, MessageType.DATA);
}
if (StringUtils.isEmpty(message.getDatastoreId())) {
logger.warn("Reprocessing message without datastore message id.");
message.setDatastoreId(UUID.randomUUID().toString());
}
return message;
}
}