Tech Blogs: BrainTree Integration with REST services

First Create your account on BrainTree sandbox.
Will send you an activation email --> Click on the activation link and activate your account.
Notedown following important information

merchantid
public key
private key

And configure in your project. In my case I have configured them as environment variable. In production ensure its encrypted.

Add following dependency in your project

	<dependency>
	<groupId>com.braintreepayments.gateway</groupId>
	<artifactId>braintree-java</artifactId>
	<version>2.77.0</version>
	</dependency>

view raw pom.xml hosted with ❤ by GitHub

Create a controller class

	package com.clouddemo.kjoshi.restep.controller;

	import com.braintreegateway.Result;
	import com.clouddemo.kjoshi.restep.service.BrainTreeService;
	import org.slf4j.Logger;
	import org.slf4j.LoggerFactory;
	import org.springframework.beans.factory.annotation.Autowired;
	import org.springframework.web.bind.annotation.RequestMapping;
	import org.springframework.web.bind.annotation.RequestParam;
	import org.springframework.web.bind.annotation.RestController;

	@RestController
	@RequestMapping("/v1/api/braintree")
	public class BrainTreeController {

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

	@Autowired
	BrainTreeService svc;

	@RequestMapping("/token")
	public void getBrainTreeToken(){
	svc.getClientTocken();
	}

	@RequestMapping("/transaction")
	public Result bookTransaction(@RequestParam("amt")Double amt,@RequestParam("nonce")String nonce){
	logger.info("Booking transaction for amount:{} and nounce:{}",amt,nonce);
	return svc.performTransaction(amt,nonce);
	}
	}

view raw BrainTreeController.java hosted with ❤ by GitHub

And a service class

	package com.clouddemo.kjoshi.restep.service;

	import com.braintreegateway.*;
	import org.slf4j.Logger;
	import org.slf4j.LoggerFactory;
	import org.springframework.stereotype.Service;
	import org.springframework.util.StringUtils;

	import javax.validation.ValidationException;
	import java.math.BigDecimal;

	@Service
	public class BrainTreeService {


	private static String MERCHANT_ID = System.getenv("MERCHANT_ID");
	private static String PRIVATE_KEY = System.getenv("PRIVATE_KEY");
	private static String PUBLIC_KEY = System.getenv("PUBLIC_KEY");

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

	private static BraintreeGateway gateway = new BraintreeGateway(Environment.SANDBOX,MERCHANT_ID,PUBLIC_KEY,PRIVATE_KEY);

	public String getClientTocken(){
	if(StringUtils.isEmpty(MERCHANT_ID)\|\|StringUtils.isEmpty(PRIVATE_KEY)\|\|StringUtils.isEmpty(PUBLIC_KEY)){
	logger.error("Setup issue..");
	throw new ValidationException("Setup not correct");
	}else{
	String clientToken = gateway.clientToken().generate();
	logger.info("Client token generated:{}",clientToken);
	return clientToken;
	}
	}

	public Result performTransaction(Double amt,String nonce){
	logger.info("Submitting transaction");
	TransactionRequest req = new TransactionRequest();
	req.amount(new BigDecimal(amt)).paymentMethodNonce(nonce).options().submitForSettlement(true).done();
	Result<Transaction> txn = gateway.transaction().sale(req);
	return txn;
	}
	}