com.dell.cpsd.common.rabbitmq.context.builder.MessageMetaDataReader Maven / Gradle / Ivy

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/**
 * Copyright © 2017 Dell Inc. or its subsidiaries.  All Rights Reserved.
 * Dell EMC Confidential/Proprietary Information
 */

package com.dell.cpsd.common.rabbitmq.context.builder;

import com.fasterxml.jackson.databind.ObjectMapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Collections;
import java.util.List;

/**
 * 
 * Copyright © 2017 Dell Inc. or its subsidiaries.  All Rights Reserved.
 * Dell EMC Confidential/Proprietary Information
 * 
 * @author Connor Goulding
 */
public class MessageMetaDataReader
{
    private static final Logger LOGGER = LoggerFactory.getLogger(MessageMetaDataReader.class);

    private final ObjectMapper mapper = new ObjectMapper();

    public List read(File file)
    {
        try (FileInputStream fis = new FileInputStream(file))
        {
            MessagingData messagingData = mapper.readValue(fis, MessagingData.class);
            return messagingData.getMessages();
        }
        catch (IOException e)
        {
            LOGGER.error("Unable to read meta data file: " + file, e);
        }
        return Collections.emptyList();
    }

    public List read(InputStream is) throws IOException
    {
        MessagingData messagingData = mapper.readValue(is, MessagingData.class);
        return messagingData.getMessages();
    }
}