MailChimp and Java Integration – Part 2

public class MailChimpHandler implements IMailChimpHandler {
    private final Log log = LogFactory.getLog(getClass());
    // API Key - see http://admin.mailchimp.com/account/api or run login() once
    private String apiKey = "put your api key info here";
    // A List Id to run examples against. use lists() to view all
    // Also, login to MC account, go to List, then List Tools, and look for the
    // List ID entry
    private String listId = "put your list ID here";
    // Instance of the MailChimpServices
    private IMailChimpServices mcServices = null;
    // Flag indicating status of our connection to MailChimp
    private boolean connectedStatus;
    // Class to get the attributes associated with a company from database
    private ICompanyAttributesDao companyAttributesDao;
 
    public MailChimpHandler() {
        connectionStatus = false;
    }
 
    /**
    * prepare an instance of the MailChimpServices and determine
    * if we can connect using our apiKey.
    */
    private void initialize() {
        // OMITTED FOR BREVITY. SEE ARTICLE 1
    }
 
    /**
    * test the connection to see if it is still good
    * @return result
    */
    private boolean testConnection(){
        // OMITTED FOR BREVITY. SEE ARTICLE 1
    }
 
     /**
     * Performs the initialization of the mail chimp list by adding
     * all the appropriate customer contacts to the list
     * @param companyId (this is optional and only here because my application needs it. Yours almost certainly won't need it)
     * @return number of successful insertions
     */
     public int initializeMailChimpList(int companyId){
        // OMITTED FOR BREVITY. SEE ARTICLE 1
     }
 
    /**
    * add a new contact to the MailChimp List
    * @param contactId - I need this to get the contact info in question. You will use something else.
    * @return result
    */
    public boolean addUser(int contactId){
	boolean listSubscribe = false;
        // This will hold the contact data we are going to add to the mailing list
	final Map<String, String> merges = new HashMap<String, String>();
        // Get the new contact from the database. You will use something else to get your contact
	CustomerContact contact = customerContactDao.getMailChimpCustomerContact(contactId);
        // make sure we got it, else return
	if(contact == null)
		return listSubscribe;
 
	// make sure we have had a good connection, otherwise try it again	
	if (testConnection() == false){
		log.info("Attempting to re-connect to MailChimp");
		initialize();         // reinstantiate the MailChimpServices and test connection
	}
 
        // assuming we could connect, proceed
	if (connectedStatus) {
                // Add the new contact information into the Map
		merges.put("FNAME", contact.getFirstName());
		merges.put("LNAME", contact.getLastName());
		merges.put("EMAIL", contact.getEmail());
		merges.put("EMAIL_TYPE", "html");
                // Attempt to add the new contact using the listSubscribe api
                // 5th parameter is normally HTML. We set it here so we can specify 6th parameter
                // 6th parameter is whether double opt-in message is sent (defaults to true)
		try {
		        listSubscribe = mcServices.listSubscribe(apiKey, listId, contact.getEmail(), merges,
					IMailChimpServices.EMAIL_TYPE_HTML, false);
		} catch (MailChimpServiceException mcse) {
			log.error("Error in adding user to list. " + mcse.getMessage());
			mcse.printStackTrace();
		}
		log.info("listSubscribe: " + listSubscribe);
	}else
		log.info("Could not add user because could not connect to MailChimp");
 
        // return the result of our attempt to the caller 	
	return listSubscribe;
    }
 
    /**
    * update an existing contact to MailChimp. This is essentially like the addUser method
    * except we are unsubscribing the original email from the list before adding the new one.
    * In my circumstances, it is not really know what has changed on the contact&#39;s information.
    * It could be the email address. So this is why we unsubscribe the user from the list first
    * using their old email address (which could be the same as the new email address), then we
    * add the user back in. Regardless of what data had changed in the contact, the result is it
    * gets updated in the MailChimp list without creating a duplicate.
    * @param contactId - I need this to get the contact in question
    * @param oldEmail - this tells what the previous email was before the change
    * @return result
    */
    public boolean updateUser(int contactId, String oldEmail){
	boolean listSubscribe = false;
	final Map<String, String> merges = new HashMap<String, String>();
	CustomerContact contact = customerContactDao.getMailChimpCustomerContact(contactId);
	if(contact == null)
		return listSubscribe;
 
	// make sure we have had a good connection, otherwise try it again			
	if (testConnection() == false){
		log.info("Attempting to re-connect to MailChimp");
		initialize();
	}
 
        // make sure we have a connection
	if (connectedStatus) {
		// first UNSUBSCRIBE the original email address
                // the 4th parameter is to delete the existing MailChimp record (defaults false)
                // the 5th parameter is whether to send a goodbye message or not (defaults true)
                // the 6th parameter is whether to send a notification message or not (defaults true)
		try {
			listSubscribe = mcServices.listUnsubscribe(apiKey, listId, oldEmail, true, false, false);
		} catch (MailChimpServiceException mcse) {
			log.error("Error in unsubscribing user from list. " + mcse.getMessage());
			mcse.printStackTrace();
		}
		// then SUBSCRIBE the new email address
		merges.put("FNAME", contact.getFirstName());
		merges.put("LNAME", contact.getLastName());
		merges.put("EMAIL", contact.getEmail());
		merges.put("EMAIL_TYPE", "html");
		try {
			listSubscribe = mcServices.listSubscribe(apiKey, listId, contact.getEmail(), merges,
					IMailChimpServices.EMAIL_TYPE_HTML, false);
		} catch (MailChimpServiceException mcse) {
			log.error("Error in adding user to list. " + mcse.getMessage());
			mcse.printStackTrace();
		}
		log.info("listSubscribe: " + listSubscribe);
	}else
		log.info("Could not add user because could not connect to MailChimp");
	return listSubscribe;
    }
 
    /**
    * delete a contact from MailChimp. 
    * @param oldEmail - previous email address
    * @return result
    */
    public boolean deleteUser(String oldEmail){
	boolean listSubscribe = false;
 
	if (testConnection() == false){
		log.info("Attempting to re-connect to MailChimp");
		initialize();
	}
	// make sure we have a connection
	if (connectedStatus) {
		// UNSUBSCRIBE the original email address
                // the 4th parameter is to delete the existing MailChimp record (defaults false)
                // the 5th parameter is whether to send a goodbye message or not (defaults true)
                // the 6th parameter is whether to send a notification message or not (defaults true)
		try {
			listSubscribe = mcServices.listUnsubscribe(apiKey, listId, oldEmail, true, false, false);
		} catch (MailChimpServiceException mcse) {
			log.error("Error in unsubscribing user from list. " + mcse.getMessage());
			mcse.printStackTrace();
		}
		log.info("listSubscribe: " + listSubscribe);
	}else
		log.info("Could not remove user because could not connect to MailChimp");
	return listSubscribe;
    }
 
}