com.dell.cpsd.common.rabbitmq.consumer.handler.GenericMessagePropertiesHandler Maven / Gradle / Ivy
/**
* Copyright © 2017 Dell Inc. or its subsidiaries. All Rights Reserved.
* Dell EMC Confidential/Proprietary Information
*/
package com.dell.cpsd.common.rabbitmq.consumer.handler;
import com.dell.cpsd.common.logging.ILogger;
import com.dell.cpsd.common.rabbitmq.consumer.LoggingUnhandledMessageHandler;
import com.dell.cpsd.common.rabbitmq.log.RabbitMQLoggingManager;
import org.springframework.amqp.core.MessageProperties;
import java.util.UUID;
/**
* This is a generic handler base class for messages with message properties.
*
* Copyright © 2017 Dell Inc. or its subsidiaries. All Rights Reserved.
* Dell EMC Confidential/Proprietary Information
*
*
* @since SINCE-TBD
*/
public abstract class GenericMessagePropertiesHandler extends LoggingUnhandledMessageHandler
{
/*
* The logger for this class.
*/
private static final ILogger LOGGER = RabbitMQLoggingManager.getLogger(GenericMessagePropertiesHandler.class);
/**
* GenericMessagePropertiesHandler constructor.
*
* @since 1.0
*/
public GenericMessagePropertiesHandler()
{
this("GenericMessageHandler@" + UUID.randomUUID().toString());
}
/**
* GenericMessagePropertiesHandler constructor.
*
* @param consumerName The consumer identifier.
* @since 1.0
*/
public GenericMessagePropertiesHandler(String consumerName)
{
super(consumerName);
}
/**
* This executes the operation This might include updating a database,
* sending further messages to continue the conversation.
*
* @param requestMessage The message to process.
* @param messageProperties The message properties.
* @throws Throwable Thrown if there operation fails.
* @since 1.0
*/
protected abstract void executeOperation(final R requestMessage, final MessageProperties messageProperties) throws Throwable;
/**
* This handles the message.
*
* @param requestMessage The message to handle.
* @since 1.0
*/
public void handleMessage(final R requestMessage, final MessageProperties messageProperties) throws E
{
try
{
executeOperation(requestMessage, messageProperties);
}
catch (Throwable e)
{
LOGGER.error(e.getMessage(), e);
}
finally
{
cleanup(requestMessage);
}
}
/**
* This performs an required cleanup after the message is handled.
*
* @param requestMessage The request message.
* @since 1.0
*/
protected void cleanup(final R requestMessage)
{
// do nothing by default
}
/**
* This converts an exception.
*
* @param t The Throwable to convert.
* @return The converted exception.
* @since 1.0
*/
protected abstract E convertException(Throwable t);
}