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I am happy to announce that my new book SpringBoot : Learn By Example got published today on Leanpub. What is SpringBoot? Spring is one of the most popular Java frameworks out there to build web and enterprise application. Spring supports variety of configuration approaches (XML, Annotations, JavaConfig etc) and properly configuring Spring applications become a bit tedious and repetitive process. To avoid these problems Spring team introduced SpringBoot to address the complexity of configuring Spring application.

SpringBoot provides lot of starter modules to get up and running quickly. SpringBoot’s auto-configure mechanism takes care of configuring SpringBeans on our behalf based on various criteria. In addition to the springboot starters that comes out-of-the-box provided by Core Spring Team, we can also create our own starter modules. In this post we will look into how to create a custom SpringBoot starter. To demonstrate it we are going to create twitter4j-spring-boot-starter which will auto-configure Twitter4J beans.

In my previous article SpringBoot : Working with MyBatis we have learned how to use SpringBoot MyBatis Starter to quickly get up and running with Spring and MyBatis. In this article we are going to learn about how to use SpringBoot JOOQ Starter. JOOQ (JOOQ Object Oriented Querying) is a persistence framework which embraces SQL. JOOQ provides the following features: Building Typesafe SQL using DSL API Typesafe database object referencing using Code Generation Easy to use API for Querying and Data fetching SQL logging and debugging

MyBatis is a SQL Mapping framework with support for custom SQL, stored procedures and advanced mappings. SpringBoot doesn’t provide official support for MyBatis integration, but MyBatis community built a SpringBoot starter for MyBatis. You can read about the SpringBoot MyBatis Starter release announcement at http://blog.mybatis.org/2015/11/mybatis-spring-boot-released.html and you can explore the source code on GitHub https://github.com/mybatis/mybatis-spring-boot. Create a SpringBoot Maven project and add the following MyBatis Starter dependency. <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.

Spring provides a nice abstraction on top of JDBC API using JdbcTemplate and also provides great transaction management capabilities using annotation based approach. First let’s take a quick look at how we generally use Spring’s JdbcTemplate (without SpringBoot) by registering DataSource, TransactionManager and JdbcTemplate beans and optionally we can register DataSourceInitializer bean to initialize our database. @Configuration @ComponentScan @EnableTransactionManagement @PropertySource(value = { "classpath:application.properties" }) public class AppConfig { @Autowired private Environment env; @Value("${init-db:false}") private String initDatabase; @Bean public static PropertySourcesPlaceholderConfigurer placeHolderConfigurer() { return new PropertySourcesPlaceholderConfigurer(); } @Bean public JdbcTemplate jdbcTemplate(DataSource dataSource) { return new JdbcTemplate(dataSource); } @Bean public PlatformTransactionManager transactionManager(DataSource dataSource) { return new DataSourceTransactionManager(dataSource); } @Bean public DataSource dataSource() { BasicDataSource dataSource = new BasicDataSource(); dataSource.

In my previous post Why SpringBoot? we have looked at how to create a SpringBoot application. But you may or may not understand what is going on behind the scenes. You may want to understand the magic behind the SpringBoot’s AutoConfiguration. But before that you should know about Spring’s @Conditional feature based on which all the SpringBoot’s AutoConfiguration magic depends. Exploring the power of @Conditional While developing Spring based applications we may come across of a need to register beans conditionally.

Spring is a very popular Java based framework for building web and enterprise applications. Unlike many other frameworks which focuses on only one area, Spring framework provides a wide verity of features addressing the modern business needs via its portfolio projects. Spring framework provides flexibility to configure the beans in multiple ways such as XML, Annotations and JavaConfig. With the number of features increased the complexity also gets increased and configuring Spring applications becomes tedious and error-prone.

So far our JCart application is running on Tomcat default port 8080 using HTTP protocol. In this article we will configure to use HTTPS by using Self Signed Certificate. For real projects you would have to buy certificate from a Trusted Authority. I would like to run ShoppingCart site on https://host:8443 and if anyone tries to access it from http://host:8080 it should redirect to https://host:8443. Similarly I would like to run Administration site on https://host:9443 and if anyone tries to access it from http://host:9090 it should redirect to https://host:9443.

Once the Admin User clicked on Password Reset Link that we sent via Email, we will validate the Token and if is valid then we will show a form to enter New Password, otherwise shows an error. @Controller public class UserAuthController extends JCartAdminBaseController { ... @RequestMapping(value="/resetPwd", method=RequestMethod.GET) public String resetPwd(HttpServletRequest request, Model model, RedirectAttributes redirectAttributes) { String email = request.getParameter("email"); String token = request.getParameter("token"); boolean valid = securityService.verifyPasswordResetToken(email, token); if(valid){ model.

We will provide a link to Forgot Password in Login page and create jcart-admin/src/main/resources/templates/public/forgotPwd.html template as follows: <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org" layout:decorator="layout/guestLayout"> <head> <title>Forgot Password</title> </head> <body > <div layout:fragment="content"> <form action="forgotPwd" th:action="@{/forgotPwd}" method="post"> <input type="email" class="form-control" name="email" placeholder="Email"/> <button type="submit" class="btn btn-primary btn-block btn-flat" th:text="#{label.submit}">Submit</button> </form> </div> </body> </html> When Admin user enters the email address and submit we will generate a token, store it in our DB and generates a Reset Password Link and send it to their email.