Subversion Repositories SmartDukaan

package in.shop2020.payment.service.handler;

import in.shop2020.model.v1.order.RechargeOrder;

import in.shop2020.payment.domain.Refund;

import in.shop2020.payment.handler.PaymentGatewayHandler;

import in.shop2020.payment.handler.PaymentHandler;

import in.shop2020.payment.handler.PaymentRequiringExtraProcessingHandler;

import in.shop2020.payment.handler.RefundHandler;

import in.shop2020.payments.Attribute;

import in.shop2020.payments.ExtraPaymentProcessingType;

import in.shop2020.payments.Payment;

import in.shop2020.payments.PaymentException;

import in.shop2020.payments.PaymentGateway;

import in.shop2020.payments.PaymentService.Iface;

import in.shop2020.payments.PaymentStatus;

import in.shop2020.thrift.clients.TransactionClient;

import java.text.SimpleDateFormat;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Date;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import org.apache.thrift.TException;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class PaymentServiceHandler implements Iface {

    private static Logger logger = LoggerFactory.getLogger(PaymentServiceHandler.class);

    /**

     * Enum of all statuses that can be returned by the HDFC gateway

     * 

     * @author Chandranshu

     * 

     */

    private enum HdfcPaymentReturnStatus{

        APPROVED("APPROVED"),

        NOT_APPROVED("NOT APPROVED"),

        CAPTURED("CAPTURED"),

        NOT_CAPTURED ("NOT CAPTURED"),

        CANCELLED ("CANCELLED"),

        DENIED_BY_RISK("DENIED BY RISK"),

        HOST_TIMEOUT("HOST TIMEOUT");

        private String value;

        HdfcPaymentReturnStatus(String value) {

            this.value = value;

        }

        public String value(){

            return this.value;

        }

    }

	public static final long PAYMENT_NOT_CREATED = -1;

	private static final long HDFC_GATEWAY_ID = 1;

	private static final long EBS_GATEWAY_ID = 2;

	private static final List<Long> HDFC_EMI_GATEWAY_IDS = Arrays.asList(5L,10L,11L,12L);

	ApplicationContext context = new ClassPathXmlApplicationContext("context.xml");

	PaymentHandler paymentHandler = (PaymentHandler) context.getBean("paymentHandler");

    PaymentRequiringExtraProcessingHandler paymentRequiringExtraProcessingHandler =

        (PaymentRequiringExtraProcessingHandler) context.getBean("paymentRequiringExtraProcessingHandler");

    PaymentGatewayHandler paymentGatewayHandler = (PaymentGatewayHandler) context.getBean("paymentGatewayHandler");

	RefundHandler refundHandler = (RefundHandler) context.getBean("refundHandler");

	public void setDataSourceUrl(String dbHost){

		org.apache.commons.dbcp.BasicDataSource ds = (org.apache.commons.dbcp.BasicDataSource)context.getBean("dataSource");

		ds.setUrl(dbHost);

	}

	public String getDataSourceUrl(){

		org.apache.commons.dbcp.BasicDataSource ds = (org.apache.commons.dbcp.BasicDataSource)context.getBean("dataSource");

		return ds.getUrl();

	}

	@Override

	public long createPayment(long userId, double amount, long gatewayId, long txnId, boolean isDigital) throws PaymentException, TException {

	    logger.info("Creating payment corresponding to our txn id:" + txnId);

		in.shop2020.payment.domain.Payment payment = new in.shop2020.payment.domain.Payment();

		payment.setUserId(userId);

		payment.setAmount(amount);

		payment.setGatewayId(gatewayId);

		payment.setMerchantTxnId(txnId);

		payment.setStatus(PaymentStatus.INIT.getValue());

		payment.setDigital(isDigital);

		return paymentHandler.insertPayment(payment);

	}

	@Override

	public List<Payment> getPaymentsForUser(long userId, long fromTime, long toTime, PaymentStatus status, long gatewayId) throws PaymentException, TException {

	    logger.info("Getting payments from " + fromTime + " to " + toTime + " for user: " + userId);

		int statusValue = -1;

		if(status != null)

			statusValue = status.getValue();

		else

			statusValue = -1;

		return getThriftPayments(paymentHandler.getPaymentsForUser(userId, fromTime, toTime, statusValue, gatewayId));

	}

	@Override

	public List<Payment> getPayments(long fromTime, long toTime, PaymentStatus status, long gatewayId) throws PaymentException,	TException {

	    logger.info("Getting payments from " + fromTime + " to " + toTime);

		int statusValue = -1;

		if(status != null)

			statusValue = status.getValue();

		else

			statusValue = -1;

		return getThriftPayments(paymentHandler.getPayments(fromTime, toTime, statusValue, gatewayId));

	}

	@Override

	public List<Payment> getPaymentsByCapturedDate(long fromTime, long toTime, long gatewayId) throws PaymentException, TException {

		logger.info("Getting payments from " + fromTime + " to " + toTime + " for " + gatewayId);

		return getThriftPayments(paymentHandler.getPaymentsByCapturedDate(fromTime, toTime, gatewayId));

	}

	@Override

	public PaymentGateway getPaymentGateway(long id) throws PaymentException, TException {

	    logger.info("Getting payment gateway with id:" + id);

		return paymentGatewayHandler.getPaymentGateway(id).getThriftPaymentGateway();

	}

	@Override

	public List<PaymentGateway> getActivePaymentGateways() throws PaymentException, TException {

	    logger.info("Getting all active payment gateways");

	    return getThriftPaymentGateways(paymentGatewayHandler.getActivePaymentGateways());

	}

	@Override

	public Payment getPayment(long id) throws PaymentException, TException {

	    logger.info("Getting payment with id: " + id);

		return paymentHandler.getPayment(id).getThriftPayment();

	}

	@Override

	public List<Payment> getPaymentForTxnId(long txnId) throws PaymentException, TException {

	    logger.info("Getting payment for the txn id: " + txnId);

		return getThriftPayments(paymentHandler.getPaymentForTxn(txnId));

	}

	@Override

	public Payment getSuccessfulPaymentForTxnId(long txnId) throws PaymentException, TException {

		for (Payment payment: getPaymentForTxnId(txnId))	{

			if (payment.getStatus() == PaymentStatus.SUCCESS || payment.getStatus() == PaymentStatus.PARTIALLY_CAPTURED)	{

				return payment;

			}

		}

		return null;

	}

	@Override

	public boolean updatePaymentDetails(long id, String gatewayPaymentId,

			String sessionId, String gatewayTxnStatus, String description,

			String gatewayTxnId, String authCode, String referenceCode,

			String errorCode, PaymentStatus status, String gatewayTxnDate,

			List<Attribute> attributes) throws PaymentException, TException {

	    logger.info("Updating details of payment id: " + id);

		in.shop2020.payment.domain.Payment payment = paymentHandler.getPayment(id);

		payment.setGatewayPaymentId(gatewayPaymentId);

		payment.setSessionId(sessionId);

		payment.setGatewayTxnStatus(gatewayTxnStatus);

		payment.setDescription(description);

		payment.setGatewayTxnId(gatewayTxnId);

		payment.setAuthCode(authCode);

		payment.setReferenceCode(referenceCode);

		payment.setErrorCode(errorCode);

		if(status!=null){

			payment.setStatus(status.getValue());

			if(status.equals(PaymentStatus.SUCCESS))

				payment.setSuccessTimestamp(new Date());

			else if(status.equals(PaymentStatus.FAILED)) {

			    payment.setErrorTimestamp(new Date());

			    persistPaymentRequiringExtraProcessing(payment, ExtraPaymentProcessingType.FAILED_PAYMENTS);

			}

			else if (status.equals(PaymentStatus.PROVISIONALLY_CAPTURED)) {

			    // FIXME different column to note provisional capture timestamp

			    // FIXME Requires extra processing at Crm end for actual manual capture

			    payment.setProvisionalCaptureTimestamp(new Date());

			    persistPaymentRequiringExtraProcessing(payment, ExtraPaymentProcessingType.PENDING_CAPTURE);

			}

		}

		payment.setGatewayTxnDate(gatewayTxnDate);

		Map<String, String> attrMap = new HashMap<String, String>();

		if(attributes != null){

			for(Attribute attribute : attributes){

				attrMap.put(attribute.getName(), attribute.getValue());

			}

		}

		paymentHandler.updatePayment(payment, attrMap);

		return true;

	}

	/**

	 * Persists a given payment Id in another table for future processing by CRM etc.

	 * Failed payments generally require a follow-up to help customers through our

	 * CRM-Outbound team.

	 *

	 * @param payment  the payment object that failed.

	 * @param type TODO

	 */

	private void persistPaymentRequiringExtraProcessing(in.shop2020.payment.domain.Payment payment, ExtraPaymentProcessingType type) {

	    try {

            paymentRequiringExtraProcessingHandler.insert(payment.getId(), type);

        } catch (Exception e) {

            logger.error("Could not persist payment: " + payment.getId(), e);

        }

    }

    @Override

	public List<Double> getSuccessfulPaymentsAmountRange() throws TException {

	    logger.info("Getting the range of successful payments.");

		List<Double> minMaxAmounts = new ArrayList<Double>();

		Map<String, Float> minMax = paymentHandler.getMinMaxPaymentAmount();

		minMaxAmounts.add(Double.parseDouble(Float.toString(minMax.get("MIN"))));

		minMaxAmounts.add(Double.parseDouble(Float.toString(minMax.get("MAX"))));

		return minMaxAmounts;

	}

    @Override

    public String initializeHdfcPayment(long merchantPaymentId) throws PaymentException, TException {

        logger.info("Initializing HDFC payment with id: " + merchantPaymentId);

        in.shop2020.payment.domain.Payment payment = paymentHandler.getPayment(merchantPaymentId);

        String redirectURL;

        try {

            redirectURL = HdfcPaymentHandler.initializeHdfcPayment(payment, this);

        } catch (Exception e) {

            throw new PaymentException(102, "Error while initiliazing payment. Check service log for more details.");

        }

        return redirectURL;

    }

    @Override

	public String doHdfcPaymentForDigitalOrder(long merchantPaymentId, long rechargeOrderId, String phone) throws PaymentException, TException {

        logger.info("Initializing HDFC payment with id: " + merchantPaymentId);

        in.shop2020.payment.domain.Payment payment = paymentHandler.getPayment(merchantPaymentId);

        TransactionClient tc = new TransactionClient();

        String redirectURL;

        RechargeOrder rechargeOrder;

        try {

            rechargeOrder = tc.getClient().getRechargeOrder(rechargeOrderId);

            redirectURL = HdfcPaymentHandler.initializeHdfcPayment(payment, rechargeOrder, phone, this);

        } catch (Exception e) {

            throw new PaymentException(102, "Error while initiliazing payment. Check service log for more details.");

        }

        return redirectURL;

    }

	@Override

    public String initializeHdfcEmiPayment(long merchantPaymentId) throws PaymentException, TException {

        logger.info("Initializing HDFC payment with id: " + merchantPaymentId);

        in.shop2020.payment.domain.Payment payment = paymentHandler.getPayment(merchantPaymentId);

        String redirectURL;

        try {

            redirectURL = HdfcEmiPaymentHandler.initializeHdfcPayment(payment, this);

        } catch (Exception e) {

            throw new PaymentException(102, "Error while initiliazing payment. Check service log for more details.");

        }

        return redirectURL;

    }

	@Override

	public synchronized boolean refundPayment(long merchantTxnId, double amount, boolean isDigital) throws PaymentException, TException {

        logger.info("Attempting to refund payment of amount " + amount + " corresponding to our transaction " + merchantTxnId);

        List<in.shop2020.payment.domain.Payment> payments = paymentHandler.getPaymentForTxn(merchantTxnId);

        if(payments ==null || payments.isEmpty())

            throw new PaymentException(104, "No payments found corresponding to the merchant txn " + merchantTxnId);

        if(payments ==null || payments.isEmpty())

            throw new PaymentException(104, "No payments found corresponding to the merchant txn " + merchantTxnId);

        in.shop2020.payment.domain.Payment payment = payments.get(0);

        if(payment.getAmount() < amount){

        	logger.warn("Refund amount is more than payment amount.");

            return false;

        }

        switch(PaymentStatus.findByValue(payment.getStatus())){

        case PENDING:

            logger.error("Attempt to refund a non-authorized payment");

            return false;

        case INIT:

            logger.warn("Attempt to refund a non-authorized payment");

            return false;

        case AUTHORIZED:

        	logger.warn("Attempt to refund a non-captured payment");

            return false;

        case CAPTURE_IN_PROCESS:

        	logger.warn("Attempt to refund a non-captured payment");

            return false;

        case PROVISIONALLY_CAPTURED:

        	logger.warn("Attempt to refund a non-captured payment");

            return false;

        case REFUNDED:

        	logger.warn("Attempt to refund a refunded payment");

            return false;

        case SUCCESS:

            break;

        case FAILED:

            logger.error("Attempting to capture a failed payment");

            return false;

        }

        long gatewayId = payment.getGatewayId();

        if(gatewayId == HDFC_GATEWAY_ID){

            //Refund the HDFC payment

            return refundHdfcPayment(payment, amount);

        }else if (gatewayId == EBS_GATEWAY_ID){

            //Refund the EBS payment

            return refundEbsPayment(payment, amount);

        } 

        else if (HDFC_EMI_GATEWAY_IDS.contains(gatewayId)){

             //Capture and update the HDFC EMI payment

            return refundHdfcEmiPayment(payment, amount);

        }

        logger.error("We have an captured payment from unknown gateway: " + gatewayId);

        return false;

    }

	@Override

    public long createRefund(long orderId, long merchantTxnId, double amount) throws PaymentException, TException{

		logger.info("Attempting to create a refund for order: " + orderId);

//		if(!refundPayment(merchantTxnId, amount, false)){

//			logger.warn("Not able to refund corresponding to the merchant txn " + merchantTxnId);

//		}

		List<in.shop2020.payment.domain.Payment> payments = paymentHandler.getPaymentForTxn(merchantTxnId);

		if(payments ==null || payments.isEmpty())

			throw new PaymentException(104, "No payments found corresponding to the merchant txn " + merchantTxnId);

		in.shop2020.payment.domain.Payment payment = payments.get(0);

		if(payment.getStatus() != PaymentStatus.SUCCESS.getValue())

			throw new PaymentException(104, "No successful payments found corresponding to the merchant txn " + merchantTxnId);

		Refund refund = new Refund();

		refund.setOrderId(orderId);

		refund.setPaymentId(payment.getId());

		refund.setGatewayId(payment.getGatewayId());

		refund.setAmount(amount);

		refund.setAttempts(0);

		return refundHandler.createRefund(refund);

    }

    @Override

    public synchronized boolean capturePayment(long merchantTxnId) throws PaymentException, TException {

        logger.info("Attempting to capture payment corresponding to our transaction " + merchantTxnId);

        List<in.shop2020.payment.domain.Payment> payments = paymentHandler.getPaymentForTxn(merchantTxnId);

        if(payments ==null || payments.isEmpty())

            throw new PaymentException(104, "No payments found corresponding to the merchant txn " + merchantTxnId);

        in.shop2020.payment.domain.Payment payment = payments.get(0);

        switch(PaymentStatus.findByValue(payment.getStatus())){

        case PENDING:

            logger.error("Attempt to capture a non-authorized payment");

            return false;

        case INIT:

            logger.warn("Attempt to capture a non-authorized payment");

            return false;

        case AUTHORIZED:

        case CAPTURE_IN_PROCESS:

            //Actual work to be done in this case. Let the call proceed.

            break;

        case PROVISIONALLY_CAPTURED:

            logger.info("Attempting to capture a payment that is provisonally captured but we can let the client proceed.");

            return true;

        case SUCCESS:

            logger.warn("Attempting to capture an already captured payment but we can let the client proceed.");

            return true;

        case FAILED:

            logger.error("Attempting to capture a failed payment");

            return false;

        }

        long gatewayId = payment.getGatewayId();

        if(gatewayId == HDFC_GATEWAY_ID){

            //Capture and update the HDFC payment

            return captureAndUpdateHdfcPayment(payment);

        } else if (gatewayId == EBS_GATEWAY_ID){

            //Capture and update the EBS payment

            return captureAndUpdateEbsPayment(payment);

        } else if (HDFC_EMI_GATEWAY_IDS.contains(gatewayId)){

            //Capture and update the HDFC EMI payment

            return captureAndUpdateHdfcEmiPayment(payment);

        }

        logger.error("We have an authorized payment from unknown gateway: " + gatewayId);

        return false;

    }

    @Override

    public boolean partiallyCapturePayment(long merchantTxnId, double amount, String xferBy, String xferTxnId, long xferDate) throws PaymentException, TException {

        logger.info("Attempting to partially capture payment corresponding to our transaction " + merchantTxnId);

        List<in.shop2020.payment.domain.Payment> payments = paymentHandler.getPaymentForTxn(merchantTxnId);

        if(payments ==null || payments.isEmpty())

            throw new PaymentException(104, "No payments found corresponding to the merchant txn " + merchantTxnId);

        in.shop2020.payment.domain.Payment payment = payments.get(0);

        switch(PaymentStatus.findByValue(payment.getStatus())){

        case PENDING:

            // COD payments lie in this state before settlement.

        case INIT:

        case PARTIALLY_CAPTURED:

        case AUTHORIZED:

            // COD payments would not be in this state but we are processing

            // payments in this state as well for forward compatibility since

            // someday we'd want to be able to capture authorized CC payments

            // partially.

            break;

        case SUCCESS:

            logger.warn("Attempting to capture an already captured payment but we can let the client proceed.");

            return true;

        case FAILED:

            logger.error("Attempting to capture a failed payment");

            return false;

        }

        SimpleDateFormat mysqlDateFormatter = new SimpleDateFormat("yyyy-MM-dd 00:00:00");

        String xferDateStr = mysqlDateFormatter.format(new Date(xferDate));

        return settleAndUpdateCodPayment(payment, amount, xferBy, xferTxnId, xferDateStr);

    }

    /**

     * Capture the HDFC payment represented by the given payment object. If the

     * capture attempt is not successful, we mark this payment as failed. We

     * don't retry or anything. We'll add the support of multiple attempts later

     * on.

     * 

     * @param payment The payment which has to be captured.

     * @return True if the payment attempt is successful, false if not.

     * @throws PaymentException 

     */

    private boolean captureAndUpdateHdfcPayment(in.shop2020.payment.domain.Payment payment) throws PaymentException {

        long merchantPaymentId = payment.getId();

        logger.info("Capturing HDFC payment with id: " + merchantPaymentId);

        Map<String, String> captureResult = HdfcPaymentHandler.capturePayment(payment);

        String captureStatus = captureResult.get(IPaymentHandler.STATUS);

        String gatewayStatus = captureResult.get(IPaymentHandler.GATEWAY_STATUS);

        Map<String, String> attrMap = new HashMap<String, String>();

        if (!captureStatus.trim().equals("0") 

                || !HdfcPaymentReturnStatus.CAPTURED.value().equals(gatewayStatus)) {

            // Failure

            logger.error("Capture attempt failed for HDFC payment with id: " + merchantPaymentId);

            String description = captureResult.get(IPaymentHandler.ERROR);

            String errorCode = captureResult.get(IPaymentHandler.ERR_CODE);

            payment.setDescription(description);

            payment.setErrorCode(errorCode);

            payment.setErrorTimestamp(new Date());

            if (IPaymentHandler.Errors.CONN_FAILURE.code.equals(errorCode)) {

                payment.setStatus(PaymentStatus.CAPTURE_IN_PROCESS.getValue());

                paymentHandler.updatePayment(payment, attrMap);

                throw new PaymentException(106, "Could not capture due to connection issue");

            }

            else {

                payment.setStatus(PaymentStatus.FAILED.getValue());

                paymentHandler.updatePayment(payment, attrMap);

                persistPaymentRequiringExtraProcessing(payment, ExtraPaymentProcessingType.FAILED_PAYMENTS);

            }

            return false;

        } else {

            // Success

            logger.info("Capture attempt successful for HDFC payment with id: " + merchantPaymentId);

            payment.setDescription("Payment Captured");

            payment.setGatewayTxnStatus(gatewayStatus);

            payment.setStatus(PaymentStatus.SUCCESS.getValue());

            payment.setSuccessTimestamp(new Date());           

            attrMap.put(IPaymentHandler.CAPTURE_TXN_ID, captureResult.get(IPaymentHandler.CAPTURE_TXN_ID));

            attrMap.put(IPaymentHandler.CAPTURE_REF_ID, captureResult.get(IPaymentHandler.CAPTURE_REF_ID));

            attrMap.put(IPaymentHandler.CAPTURE_AUTH_ID, captureResult.get(IPaymentHandler.CAPTURE_AUTH_ID));

            SimpleDateFormat captureTimeDateFormatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

            attrMap.put(HdfcPaymentHandler.CAPTURE_TIME, captureTimeDateFormatter.format(new Date()));

            paymentHandler.updatePayment(payment, attrMap);

            return true;

          }

    }

    /**

     * Capture the HDFC EMI payment represented by the given payment object. If

     * the capture attempt is not successful, we mark this payment as failed. We

     * don't retry or anything. We'll add the support of multiple attempts later

     * on.

     * 

     * @param payment

     *            The payment which has to be captured.

     * @return True if the payment attempt is successful, false if not.

     * @throws PaymentException 

     */

    private boolean captureAndUpdateHdfcEmiPayment(in.shop2020.payment.domain.Payment payment) throws PaymentException{

        long merchantPaymentId = payment.getId();

        logger.info("Capturing HDFC payment with id: " + merchantPaymentId);

        Map<String, String> captureResult = HdfcEmiPaymentHandler.capturePayment(payment);

        String captureStatus = captureResult.get(IPaymentHandler.STATUS);

        String gatewayStatus = captureResult.get(IPaymentHandler.GATEWAY_STATUS);

        Map<String, String> attrMap = new HashMap<String, String>();

        if (!captureStatus.trim().equals("0") 

                || !HdfcPaymentReturnStatus.CAPTURED.value().equals(gatewayStatus)) {

            // Failure

            logger.error("Capture attempt failed for HDFC payment with id: " + merchantPaymentId);

            String description = captureResult.get(IPaymentHandler.ERROR);

            String errorCode = captureResult.get(IPaymentHandler.ERR_CODE);

            payment.setDescription(description);

            payment.setErrorCode(errorCode);

            payment.setErrorTimestamp(new Date());                

            // Not marking payments as failed in case of connection issues

            if (IPaymentHandler.Errors.CONN_FAILURE.code.equals(errorCode)) {

                payment.setStatus(PaymentStatus.CAPTURE_IN_PROCESS.getValue());

                paymentHandler.updatePayment(payment, attrMap);

                throw new PaymentException(106, "Could not capture due to connection issue");

            }

            else {

                payment.setStatus(PaymentStatus.FAILED.getValue());

                paymentHandler.updatePayment(payment, attrMap);

                persistPaymentRequiringExtraProcessing(payment, ExtraPaymentProcessingType.FAILED_PAYMENTS);

            }

            return false;

        } else {

            // Success

            logger.info("Capture attempt successful for HDFC payment with id: " + merchantPaymentId);

            payment.setDescription("Payment Captured");

            payment.setGatewayTxnStatus(gatewayStatus);

            payment.setStatus(PaymentStatus.SUCCESS.getValue());

            payment.setSuccessTimestamp(new Date());

            attrMap.put(IPaymentHandler.CAPTURE_TXN_ID, captureResult.get(IPaymentHandler.CAPTURE_TXN_ID));

            attrMap.put(IPaymentHandler.CAPTURE_REF_ID, captureResult.get(IPaymentHandler.CAPTURE_REF_ID));

            attrMap.put(IPaymentHandler.CAPTURE_AUTH_ID, captureResult.get(IPaymentHandler.CAPTURE_AUTH_ID));

            SimpleDateFormat captureTimeDateFormatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

            attrMap.put(HdfcPaymentHandler.CAPTURE_TIME, captureTimeDateFormatter.format(new Date()));

            paymentHandler.updatePayment(payment, attrMap);

            return true;

          }

    }

    /**

     * Capture the EBS payment represented by the given payment object. If the

     * capture attempt is not successful, we mark this payment as failed. We

     * don't retry or anything. We'll add the support of multiple attempts later

     * on.

     * 

     * @param payment The payment which has to be captured.

     * @return True if the payment attempt is successful, false if not.

     * @throws PaymentException 

     */

    private boolean captureAndUpdateEbsPayment(in.shop2020.payment.domain.Payment payment) throws PaymentException{

        Map<String, String> captureResult = EbsPaymentHandler.capturePayment(payment);

        String captureStatus = captureResult.get(EbsPaymentHandler.STATUS);

        Map<String, String> attrMap = new HashMap<String, String>();

        if("".equals(captureStatus)){

            //Failure

            logger.error("Capture attempt failed for EBS payment with id: " + payment.getId());

            String description = captureResult.get(EbsPaymentHandler.ERROR);

            String errorCode = captureResult.get(EbsPaymentHandler.ERR_CODE);

            payment.setDescription(description);

            payment.setErrorCode(errorCode);

            payment.setErrorTimestamp(new Date());

            if (IPaymentHandler.Errors.CONN_FAILURE.code.equals(errorCode)) {

                payment.setStatus(PaymentStatus.CAPTURE_IN_PROCESS.getValue());            

                paymentHandler.updatePayment(payment, attrMap);

                throw new PaymentException(106, "Could not capture due to connection issue");

            }

            else {

                payment.setStatus(PaymentStatus.FAILED.getValue());            

                paymentHandler.updatePayment(payment, attrMap);

                persistPaymentRequiringExtraProcessing(payment, ExtraPaymentProcessingType.FAILED_PAYMENTS);

            }

            return false;

        }else{

            //Success

            logger.info("Capture attempt successful for EBS payment with id: " + payment.getId());

            payment.setGatewayTxnStatus(captureStatus);

            payment.setStatus(PaymentStatus.SUCCESS.getValue());

            payment.setSuccessTimestamp(new Date());

            attrMap.put(IPaymentHandler.CAPTURE_TXN_ID, captureResult.get(IPaymentHandler.CAPTURE_TXN_ID));

            attrMap.put(IPaymentHandler.CAPTURE_TIME, captureResult.get(IPaymentHandler.CAPTURE_TIME));

            paymentHandler.updatePayment(payment, attrMap);

            return true;

        }

    }

    /**

     * Refund the HDFC payment represented by the given payment object. If the

     * refund attempt is not successful, will not any action.

     * 

     * @param payment The payment which has to be captured.

     * @amount amount to be refunded

     * @return True if the payment attempt is successful, false if not.

     * @throws PaymentException 

     */

    private boolean refundHdfcPayment(in.shop2020.payment.domain.Payment payment, double amount) throws PaymentException {

        long merchantPaymentId = payment.getId();

        logger.info("Refunding HDFC payment with id: " + merchantPaymentId);

        Map<String, String> refundResult = HdfcPaymentHandler.refundPayment(payment, amount);

        String refundStatus = refundResult.get(IPaymentHandler.STATUS);

        String gatewayStatus = refundResult.get(IPaymentHandler.GATEWAY_STATUS);

        Map<String, String> attrMap = new HashMap<String, String>();

        if (!refundStatus.trim().equals("0") 

                || !HdfcPaymentReturnStatus.CAPTURED.value().equals(gatewayStatus)) {

        	logger.error("Refund attempt failed for HDFC payment with id: " + merchantPaymentId);

            String description = refundResult.get(IPaymentHandler.ERROR);

            String errorCode = refundResult.get(IPaymentHandler.ERR_CODE);

            payment.setDescription(description);

            payment.setErrorCode(errorCode);

            payment.setErrorTimestamp(new Date());

            if (IPaymentHandler.Errors.CONN_FAILURE.code.equals(errorCode)) {

                //payment.setStatus(PaymentStatus.CAPTURE_IN_PROCESS.getValue());

                //paymentHandler.updatePayment(payment, attrMap);

                throw new PaymentException(106, "Could not capture due to connection issue. Try Later");

            }

            else {

//                payment.setStatus(PaymentStatus.FAILED.getValue());

//                paymentHandler.updatePayment(payment, attrMap);

                persistPaymentRequiringExtraProcessing(payment, ExtraPaymentProcessingType.FAILED_PAYMENTS);

            }

            return false;

        } else {

            // Success

            logger.info("Refund attempt successful for HDFC payment with id: " + merchantPaymentId);

            payment.setDescription("Payment Refunded");

            payment.setGatewayTxnStatus(gatewayStatus);

            payment.setStatus(PaymentStatus.REFUNDED.getValue());           

            attrMap.put(IPaymentHandler.REFUND_TXN_ID, refundResult.get(IPaymentHandler.REFUND_TXN_ID));

            attrMap.put(IPaymentHandler.REFUND_REF_ID, refundResult.get(IPaymentHandler.REFUND_REF_ID));

            attrMap.put(IPaymentHandler.REFUND_AUTH_ID, refundResult.get(IPaymentHandler.REFUND_AUTH_ID));

            SimpleDateFormat captureTimeDateFormatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

            attrMap.put(HdfcPaymentHandler.REFUND_TIME, captureTimeDateFormatter.format(new Date()));

            paymentHandler.updatePayment(payment, attrMap);

            return true;

          }

    }

    /**

     * Refund the HDFC EMI payment represented by the given payment object. If

     * the capture attempt is not successful, we will not do anything.

     * 

     * @param payment

     *            The payment which has to be captured.

     * @return True if the payment attempt is successful, false if not.

     * @throws PaymentException 

     */

    private boolean refundHdfcEmiPayment(in.shop2020.payment.domain.Payment payment, double amount) throws PaymentException{

        long merchantPaymentId = payment.getId();

        logger.info("Refunding HDFC payment with id: " + merchantPaymentId);

        Map<String, String> refundResult = HdfcEmiPaymentHandler.refundPayment(payment, amount);

        String refundStatus = refundResult.get(IPaymentHandler.STATUS);

        String gatewayStatus = refundResult.get(IPaymentHandler.GATEWAY_STATUS);

        Map<String, String> attrMap = new HashMap<String, String>();

        if (!refundStatus.trim().equals("0") 

                || !HdfcPaymentReturnStatus.CAPTURED.value().equals(gatewayStatus)) {

            // Failure

            logger.error("Refund attempt failed for HDFC payment with id: " + merchantPaymentId);

            String description = refundResult.get(IPaymentHandler.ERROR);

            String errorCode = refundResult.get(IPaymentHandler.ERR_CODE);

            payment.setDescription(description);

            payment.setErrorCode(errorCode);

            payment.setErrorTimestamp(new Date());                

            // Not marking payments as failed in case of connection issues

            if (IPaymentHandler.Errors.CONN_FAILURE.code.equals(errorCode)) {

             //   payment.setStatus(PaymentStatus.CAPTURE_IN_PROCESS.getValue());

             //   paymentHandler.updatePayment(payment, attrMap);

                throw new PaymentException(106, "Could not capture due to connection issue");

            }

            else {

              //  payment.setStatus(PaymentStatus.FAILED.getValue());

              //  paymentHandler.updatePayment(payment, attrMap);

                persistPaymentRequiringExtraProcessing(payment, ExtraPaymentProcessingType.FAILED_PAYMENTS);

            }

            return false;

        } else {

            // Success

            logger.info("Refund attempt successful for HDFC payment with id: " + merchantPaymentId);

            payment.setDescription("Payment Refunded");

            payment.setGatewayTxnStatus(gatewayStatus);

            payment.setStatus(PaymentStatus.REFUNDED.getValue());           

            attrMap.put(IPaymentHandler.REFUND_TXN_ID, refundResult.get(IPaymentHandler.REFUND_TXN_ID));

            attrMap.put(IPaymentHandler.REFUND_REF_ID, refundResult.get(IPaymentHandler.REFUND_REF_ID));

            attrMap.put(IPaymentHandler.REFUND_AUTH_ID, refundResult.get(IPaymentHandler.REFUND_AUTH_ID));

            SimpleDateFormat captureTimeDateFormatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

            attrMap.put(HdfcPaymentHandler.REFUND_TIME, captureTimeDateFormatter.format(new Date()));

            paymentHandler.updatePayment(payment, attrMap);

            return true;

          }

    }

    /**

     * Refund the EBS payment represented by the given payment object. If the

     * capture attempt is not successful, we will ignore. We don't retry or anything. 

     * We'll add the support of multiple attempts later on.

     * 

     * @param payment The payment which has to be captured.

     * @amount Amount to be refunded

     * @return True if the payment attempt is successful, false if not.

     * @throws PaymentException 

     */

    private boolean refundEbsPayment(in.shop2020.payment.domain.Payment payment, double amount) throws PaymentException{

        Map<String, String> refundResult = EbsPaymentHandler.refundPayment(payment, amount);

        String refundStatus = refundResult.get(EbsPaymentHandler.STATUS);

        Map<String, String> attrMap = new HashMap<String, String>();

        if("".equals(refundStatus)){

            //Failure

            logger.error("Refund attempt failed for EBS payment with id: " + payment.getId());

            String description = refundResult.get(EbsPaymentHandler.ERROR);

            String errorCode = refundResult.get(EbsPaymentHandler.ERR_CODE);

            payment.setDescription(description);

            payment.setErrorCode(errorCode);

            payment.setErrorTimestamp(new Date());

            if (IPaymentHandler.Errors.CONN_FAILURE.code.equals(errorCode)) {

//                payment.setStatus(PaymentStatus.CAPTURE_IN_PROCESS.getValue());            

//                paymentHandler.updatePayment(payment, attrMap);

                throw new PaymentException(106, "Could not capture due to connection issue");

            }

            else {

//                payment.setStatus(PaymentStatus.FAILED.getValue());            

//                paymentHandler.updatePayment(payment, attrMap);

                persistPaymentRequiringExtraProcessing(payment, ExtraPaymentProcessingType.FAILED_PAYMENTS);

            }

            return false;

        }else{

            //Success

            logger.info("Refund attempt successful for EBS payment with id: " + payment.getId());

            payment.setGatewayTxnStatus(refundStatus);

            payment.setStatus(PaymentStatus.REFUNDED.getValue());

            attrMap.put(IPaymentHandler.REFUND_TXN_ID, refundResult.get(IPaymentHandler.REFUND_TXN_ID));

            attrMap.put(IPaymentHandler.REFUND_TIME, refundResult.get(IPaymentHandler.REFUND_TIME));

            paymentHandler.updatePayment(payment, attrMap);

            return true;

        }

    }

    /**

     * Updates the settlement details of COD payments. Sets payment status as

     * either PARTIALLY CAPTURED or SUCCESS depending on whether the complete

     * amount has been captured. Other parameters are set as attributes.

     * 

     * @param payment

     *            The payment which needs to be updated.

     * @param amount

     *            Amount that has been captured.

     * @param xferBy

     *            Entity which transferred the money.

     * @param xferTxnId

     *            Transaction Id of the transfer.

     * @param xferDateStr

     *            Date on which the transfer took place.

     * @return true if the payment details were updated successfully.

     * @throws PaymentException

     *             if the captured amount will become more than the actual

     *             amount after this update.

     */

    private boolean settleAndUpdateCodPayment(in.shop2020.payment.domain.Payment payment, double amount, String xferBy, String xferTxnId, String xferDateStr) throws PaymentException{

        Map<String, String> attrMap = payment.getAttributeMap();

        double captureAmount = 0;

        String captureAmntStr = attrMap.get(IPaymentHandler.CAPTURE_AMNT);

        if(captureAmntStr != null)

            captureAmount = Double.parseDouble(captureAmntStr);

        captureAmount += amount;

        // If capture amount higher than payment amount by more than 50 paisa,

        // there is some issue and we should raise exception.

        if(captureAmount - payment.getAmount() > 0.5){

        	throw new PaymentException(105, "We've got a settlement request for an amount which is more than the transaction value.");

        }

        // If capture amount differs from payment amount by less than 50 paisa, lets mark the payment as successful. 

        // Else we can safely assume there will be some more orders for the payment, leading to make the payment as partially captured.

        if(Math.abs(captureAmount - payment.getAmount()) < 0.5){

        	payment.setStatus(PaymentStatus.SUCCESS.getValue());

        }else {

        	payment.setStatus(PaymentStatus.PARTIALLY_CAPTURED.getValue());   

        }

        payment.setSuccessTimestamp(new Date());

        attrMap.put(IPaymentHandler.CAPTURE_AMNT, captureAmount + "");

        attrMap.put(IPaymentHandler.XFER_TXN_ID, xferTxnId);

        attrMap.put(IPaymentHandler.XFER_TXN_DATE, xferDateStr);

        attrMap.put(IPaymentHandler.XFER_BY, xferBy);

        paymentHandler.updatePayment(payment, attrMap);

        return true;

    }

    /**

     * Creates a list of thrift payment objects corresponding to a list of

     * payment data objects.

     * 

     * @param daoPayments

     *            A list of payment DAO.

     * @return A list of Thrift payment objects.

     */

    private List<Payment> getThriftPayments(List<in.shop2020.payment.domain.Payment> daoPayments){

        List<Payment> payments = new ArrayList<Payment>();

        for(in.shop2020.payment.domain.Payment payment : daoPayments){

            payments.add(payment.getThriftPayment());

        }

        return payments;

    }

    /**

     * Creates a list of thrift payment gateway objects corresponding to a list of

     * payment gateway data objects.

     * 

     * @param daoPaymentGateways

     *            A list of payment gateway DAO.

     * @return A list of Thrift payment gateway objects.

     */

    private List<PaymentGateway> getThriftPaymentGateways(List<in.shop2020.payment.domain.PaymentGateway> daoPaymentGateways){

        List<PaymentGateway> paymentGateways = new ArrayList<PaymentGateway>();

        for(in.shop2020.payment.domain.PaymentGateway paymentGateway : daoPaymentGateways){

            paymentGateways.add(paymentGateway.getThriftPaymentGateway());

        }

        return paymentGateways;

    }

	@Override

	public boolean isAlive() {

	    try {

            return !paymentGatewayHandler.getActivePaymentGateways().isEmpty();

        } catch (Exception e) {

            logger.error("Could not fetch payment gateways", e);

        }

        return false;

	}

    @Override

    public void closeSession() throws TException {

        // TODO Auto-generated method stub      

    }

    @Override

    public List<Long> getPaymentsRequiringExtraProcessing (

            ExtraPaymentProcessingType category) throws TException {

        return paymentRequiringExtraProcessingHandler.getPaymentIds(category);

    }

    @Override

    public void markPaymentAsProcessed(long paymentId,

            ExtraPaymentProcessingType category) throws TException {

        paymentRequiringExtraProcessingHandler.delete(paymentId, category);

    }

}