BAEL-1800 (#4377)

* BAEL-1800 - Code for http://www.baeldung.com/spring-boot-starters and http://www.baeldung.com/spring-mvc-custom-data-binder * BAEL-1800 - Code for http://www.baeldung.com/maven-webjars and http://www.baeldung.com/deployable-fat-jar-spring-boot * BAEL-1800 - Code for http://www.baeldung.com/spring-boot-shutdown * BAEL-1800 - Code for http://www.baeldung.com/spring-boot-shutdown * BAEL-1800 - Code for http://www.baeldung.com/spring-boot-dependency-management-custom-parent
2018-05-30 22:34:01 -04:00
parent 8e36e2b155
commit 6e94f0343c
75 changed files with 965 additions and 50 deletions
--- a/spring-boot-ops/src/main/java/com/baeldung/graphql/Author.java
+++ b/spring-boot-ops/src/main/java/com/baeldung/graphql/Author.java
@@ -0,0 +1,31 @@
+package com.baeldung.graphql;
+
+public class Author {
+    private String id;
+    private String name;
+    private String thumbnail;
+
+    public String getId() {
+        return id;
+    }
+
+    public void setId(String id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getThumbnail() {
+        return thumbnail;
+    }
+
+    public void setThumbnail(String thumbnail) {
+        this.thumbnail = thumbnail;
+    }
+}
--- a/spring-boot-ops/src/main/java/com/baeldung/graphql/AuthorDao.java
+++ b/spring-boot-ops/src/main/java/com/baeldung/graphql/AuthorDao.java
@@ -0,0 +1,16 @@
+package com.baeldung.graphql;
+
+import java.util.List;
+import java.util.Optional;
+
+public class AuthorDao {
+    private List<Author> authors;
+
+    public AuthorDao(List<Author> authors) {
+        this.authors = authors;
+    }
+
+    public Optional<Author> getAuthor(String id) {
+        return authors.stream().filter(author -> id.equals(author.getId())).findFirst();
+    }
+}
--- a/spring-boot-ops/src/main/java/com/baeldung/graphql/AuthorResolver.java
+++ b/spring-boot-ops/src/main/java/com/baeldung/graphql/AuthorResolver.java
@@ -0,0 +1,17 @@
+package com.baeldung.graphql;
+
+import java.util.List;
+
+import com.coxautodev.graphql.tools.GraphQLResolver;
+
+public class AuthorResolver implements GraphQLResolver<Author> {
+    private PostDao postDao;
+
+    public AuthorResolver(PostDao postDao) {
+        this.postDao = postDao;
+    }
+
+    public List<Post> getPosts(Author author) {
+        return postDao.getAuthorPosts(author.getId());
+    }
+}
--- a/spring-boot-ops/src/main/java/com/baeldung/graphql/GraphqlConfiguration.java
+++ b/spring-boot-ops/src/main/java/com/baeldung/graphql/GraphqlConfiguration.java
@@ -0,0 +1,59 @@
+package com.baeldung.graphql;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class GraphqlConfiguration {
+    @Bean
+    public PostDao postDao() {
+        List<Post> posts = new ArrayList<>();
+        for (int postId = 0; postId < 10; ++postId) {
+            for (int authorId = 0; authorId < 10; ++authorId) {
+                Post post = new Post();
+                post.setId("Post" + authorId + postId);
+                post.setTitle("Post " + authorId + ":" + postId);
+                post.setText("Post " + postId + " + by author " + authorId);
+                post.setAuthorId("Author" + authorId);
+                posts.add(post);
+            }
+        }
+        return new PostDao(posts);
+    }
+
+    @Bean
+    public AuthorDao authorDao() {
+        List<Author> authors = new ArrayList<>();
+        for (int authorId = 0; authorId < 10; ++authorId) {
+            Author author = new Author();
+            author.setId("Author" + authorId);
+            author.setName("Author " + authorId);
+            author.setThumbnail("http://example.com/authors/" + authorId);
+            authors.add(author);
+        }
+        return new AuthorDao(authors);
+    }
+
+    @Bean
+    public PostResolver postResolver(AuthorDao authorDao) {
+        return new PostResolver(authorDao);
+    }
+
+    @Bean
+    public AuthorResolver authorResolver(PostDao postDao) {
+        return new AuthorResolver(postDao);
+    }
+
+    @Bean
+    public Query query(PostDao postDao) {
+        return new Query(postDao);
+    }
+
+    @Bean
+    public Mutation mutation(PostDao postDao) {
+        return new Mutation(postDao);
+    }
+}
--- a/spring-boot-ops/src/main/java/com/baeldung/graphql/Mutation.java
+++ b/spring-boot-ops/src/main/java/com/baeldung/graphql/Mutation.java
@@ -0,0 +1,25 @@
+package com.baeldung.graphql;
+
+import java.util.UUID;
+
+import com.coxautodev.graphql.tools.GraphQLMutationResolver;
+
+public class Mutation implements GraphQLMutationResolver {
+    private PostDao postDao;
+
+    public Mutation(PostDao postDao) {
+        this.postDao = postDao;
+    }
+
+    public Post writePost(String title, String text, String category, String author) {
+        Post post = new Post();
+        post.setId(UUID.randomUUID().toString());
+        post.setTitle(title);
+        post.setText(text);
+        post.setCategory(category);
+        post.setAuthorId(author);
+        postDao.savePost(post);
+
+        return post;
+    }
+}
--- a/spring-boot-ops/src/main/java/com/baeldung/graphql/Post.java
+++ b/spring-boot-ops/src/main/java/com/baeldung/graphql/Post.java
@@ -0,0 +1,49 @@
+package com.baeldung.graphql;
+
+public class Post {
+    private String id;
+    private String title;
+    private String text;
+    private String category;
+    private String authorId;
+
+    public String getId() {
+        return id;
+    }
+
+    public void setId(String id) {
+        this.id = id;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public String getText() {
+        return text;
+    }
+
+    public void setText(String text) {
+        this.text = text;
+    }
+
+    public String getCategory() {
+        return category;
+    }
+
+    public void setCategory(String category) {
+        this.category = category;
+    }
+
+    public String getAuthorId() {
+        return authorId;
+    }
+
+    public void setAuthorId(String authorId) {
+        this.authorId = authorId;
+    }
+}
--- a/spring-boot-ops/src/main/java/com/baeldung/graphql/PostDao.java
+++ b/spring-boot-ops/src/main/java/com/baeldung/graphql/PostDao.java
@@ -0,0 +1,24 @@
+package com.baeldung.graphql;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class PostDao {
+    private List<Post> posts;
+
+    public PostDao(List<Post> posts) {
+        this.posts = posts;
+    }
+
+    public List<Post> getRecentPosts(int count, int offset) {
+        return posts.stream().skip(offset).limit(count).collect(Collectors.toList());
+    }
+
+    public List<Post> getAuthorPosts(String author) {
+        return posts.stream().filter(post -> author.equals(post.getAuthorId())).collect(Collectors.toList());
+    }
+
+    public void savePost(Post post) {
+        posts.add(0, post);
+    }
+}
--- a/spring-boot-ops/src/main/java/com/baeldung/graphql/PostResolver.java
+++ b/spring-boot-ops/src/main/java/com/baeldung/graphql/PostResolver.java
@@ -0,0 +1,17 @@
+package com.baeldung.graphql;
+
+import java.util.Optional;
+
+import com.coxautodev.graphql.tools.GraphQLResolver;
+
+public class PostResolver implements GraphQLResolver<Post> {
+    private AuthorDao authorDao;
+
+    public PostResolver(AuthorDao authorDao) {
+        this.authorDao = authorDao;
+    }
+
+    public Optional<Author> getAuthor(Post post) {
+        return authorDao.getAuthor(post.getAuthorId());
+    }
+}
--- a/spring-boot-ops/src/main/java/com/baeldung/graphql/Query.java
+++ b/spring-boot-ops/src/main/java/com/baeldung/graphql/Query.java
@@ -0,0 +1,17 @@
+package com.baeldung.graphql;
+
+import java.util.List;
+
+import com.coxautodev.graphql.tools.GraphQLQueryResolver;
+
+public class Query implements GraphQLQueryResolver {
+    private PostDao postDao;
+
+    public Query(PostDao postDao) {
+        this.postDao = postDao;
+    }
+
+    public List<Post> recentPosts(int count, int offset) {
+        return postDao.getRecentPosts(count, offset);
+    }
+}
--- a/spring-boot-ops/src/main/java/com/baeldung/shutdown/Application.java
+++ b/spring-boot-ops/src/main/java/com/baeldung/shutdown/Application.java
@@ -0,0 +1,50 @@
+package com.baeldung.shutdown;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.WebApplicationType;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.builder.SpringApplicationBuilder;
+import org.springframework.boot.context.ApplicationPidFileWriter;
+import org.springframework.context.ConfigurableApplicationContext;
+
+@SpringBootApplication
+public class Application {
+    
+    public static void main(String[] args) {
+
+        SpringApplication.run(Application.class, args);
+//        closeApplication();
+//        exitApplication();
+//        writePID();
+
+    }
+
+    private static void closeApplication() {
+
+        ConfigurableApplicationContext ctx = new SpringApplicationBuilder(Application.class).web(WebApplicationType.NONE).run();
+        System.out.println("Spring Boot application started");
+        ctx.getBean(TerminateBean.class);
+        ctx.close();
+    }
+
+    private static void exitApplication() {
+
+        ConfigurableApplicationContext ctx = new SpringApplicationBuilder(Application.class).web(WebApplicationType.NONE).run();
+
+        int exitCode = SpringApplication.exit(ctx, () -> {
+            // return the error code
+            return 0;
+        });
+
+        System.out.println("Exit Spring Boot");
+
+        System.exit(exitCode);
+    }
+
+    private static void writePID() {
+        SpringApplicationBuilder app = new SpringApplicationBuilder(Application.class).web(WebApplicationType.NONE);
+        app.build().addListeners(new ApplicationPidFileWriter("./bin/shutdown.pid"));
+        app.run();
+    }
+
+}
--- a/spring-boot-ops/src/main/java/com/baeldung/shutdown/ShutdownConfig.java
+++ b/spring-boot-ops/src/main/java/com/baeldung/shutdown/ShutdownConfig.java
@@ -0,0 +1,15 @@
+package com.baeldung.shutdown;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@ComponentScan(basePackages = "com.baeldung.shutdown")
+public class ShutdownConfig {
+
+    @Bean
+    public TerminateBean getTerminateBean() {
+        return new TerminateBean();
+    }
+}
--- a/spring-boot-ops/src/main/java/com/baeldung/shutdown/TerminateBean.java
+++ b/spring-boot-ops/src/main/java/com/baeldung/shutdown/TerminateBean.java
@@ -0,0 +1,11 @@
+package com.baeldung.shutdown;
+
+import javax.annotation.PreDestroy;
+
+public class TerminateBean {
+
+    @PreDestroy
+    public void onDestroy() throws Exception {
+        System.out.println("Spring Container is destroyed!");
+    }
+}
--- a/spring-boot-ops/src/main/java/com/baeldung/shutdown/shutdown/ShutdownController.java
+++ b/spring-boot-ops/src/main/java/com/baeldung/shutdown/shutdown/ShutdownController.java
@@ -0,0 +1,25 @@
+package com.baeldung.shutdown.shutdown;
+
+import org.springframework.beans.BeansException;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.ApplicationContextAware;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class ShutdownController implements ApplicationContextAware {
+    
+    private ApplicationContext context;
+    
+    @PostMapping("/shutdownContext")
+    public void shutdownContext() {
+        ((ConfigurableApplicationContext) context).close();
+    }
+
+    @Override
+    public void setApplicationContext(ApplicationContext ctx) throws BeansException {
+        this.context = ctx;
+        
+    }
+}
--- a/spring-boot-ops/src/main/java/com/baeldung/toggle/Employee.java
+++ b/spring-boot-ops/src/main/java/com/baeldung/toggle/Employee.java
@@ -0,0 +1,37 @@
+package com.baeldung.toggle;
+
+import javax.persistence.Entity;
+import javax.persistence.Id;
+
+@Entity
+public class Employee {
+
+    @Id
+    private long id;
+    private double salary;
+
+    public Employee() {
+    }
+
+    public Employee(long id, double salary) {
+        this.id = id;
+        this.salary = salary;
+    }
+
+    public long getId() {
+        return id;
+    }
+
+    public void setId(long id) {
+        this.id = id;
+    }
+
+    public double getSalary() {
+        return salary;
+    }
+
+    public void setSalary(double salary) {
+        this.salary = salary;
+    }
+
+}
--- a/spring-boot-ops/src/main/java/com/baeldung/toggle/EmployeeRepository.java
+++ b/spring-boot-ops/src/main/java/com/baeldung/toggle/EmployeeRepository.java
@@ -0,0 +1,7 @@
+package com.baeldung.toggle;
+
+import org.springframework.data.repository.CrudRepository;
+
+public interface EmployeeRepository extends CrudRepository<Employee, Long> {
+
+}
--- a/spring-boot-ops/src/main/java/com/baeldung/toggle/FeatureAssociation.java
+++ b/spring-boot-ops/src/main/java/com/baeldung/toggle/FeatureAssociation.java
@@ -0,0 +1,12 @@
+package com.baeldung.toggle;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ ElementType.METHOD, ElementType.TYPE })
+public @interface FeatureAssociation {
+    MyFeatures value();
+}
--- a/spring-boot-ops/src/main/java/com/baeldung/toggle/FeaturesAspect.java
+++ b/spring-boot-ops/src/main/java/com/baeldung/toggle/FeaturesAspect.java
@@ -0,0 +1,26 @@
+package com.baeldung.toggle;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import org.aspectj.lang.ProceedingJoinPoint;
+import org.aspectj.lang.annotation.Around;
+import org.aspectj.lang.annotation.Aspect;
+import org.springframework.stereotype.Component;
+
+@Aspect
+@Component
+public class FeaturesAspect {
+
+    private static final Logger LOG = LogManager.getLogger(FeaturesAspect.class);
+
+    @Around(value = "@within(featureAssociation) || @annotation(featureAssociation)")
+    public Object checkAspect(ProceedingJoinPoint joinPoint, FeatureAssociation featureAssociation) throws Throwable {
+        if (featureAssociation.value().isActive()) {
+            return joinPoint.proceed();
+        } else {
+            LOG.info("Feature " + featureAssociation.value().name() + " is not enabled!");
+            return null;
+        }
+    }
+
+}
--- a/spring-boot-ops/src/main/java/com/baeldung/toggle/MyFeatures.java
+++ b/spring-boot-ops/src/main/java/com/baeldung/toggle/MyFeatures.java
@@ -0,0 +1,23 @@
+package com.baeldung.toggle;
+
+import org.togglz.core.Feature;
+import org.togglz.core.activation.SystemPropertyActivationStrategy;
+import org.togglz.core.annotation.ActivationParameter;
+import org.togglz.core.annotation.DefaultActivationStrategy;
+import org.togglz.core.annotation.EnabledByDefault;
+import org.togglz.core.annotation.Label;
+import org.togglz.core.context.FeatureContext;
+
+public enum MyFeatures implements Feature {
+
+    @Label("Employee Management Feature")
+    @EnabledByDefault
+    @DefaultActivationStrategy(id = SystemPropertyActivationStrategy.ID, parameters = { @ActivationParameter(name = SystemPropertyActivationStrategy.PARAM_PROPERTY_NAME, value = "employee.feature"),
+            @ActivationParameter(name = SystemPropertyActivationStrategy.PARAM_PROPERTY_VALUE, value = "true") })
+    EMPLOYEE_MANAGEMENT_FEATURE;
+
+    public boolean isActive() {
+        return FeatureContext.getFeatureManager().isActive(this);
+    }
+
+}
--- a/spring-boot-ops/src/main/java/com/baeldung/toggle/SalaryController.java
+++ b/spring-boot-ops/src/main/java/com/baeldung/toggle/SalaryController.java
@@ -0,0 +1,20 @@
+package com.baeldung.toggle;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.ResponseBody;
+
+@Controller
+public class SalaryController {
+
+    @Autowired
+    SalaryService salaryService;
+
+    @PostMapping(value = "/increaseSalary")
+    @ResponseBody
+    public void increaseSalary(@RequestParam long id) {
+        salaryService.increaseSalary(id);
+    }
+}
--- a/spring-boot-ops/src/main/java/com/baeldung/toggle/SalaryService.java
+++ b/spring-boot-ops/src/main/java/com/baeldung/toggle/SalaryService.java
@@ -0,0 +1,19 @@
+package com.baeldung.toggle;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class SalaryService {
+
+    @Autowired
+    EmployeeRepository employeeRepository;
+
+    @FeatureAssociation(value = MyFeatures.EMPLOYEE_MANAGEMENT_FEATURE)
+    public void increaseSalary(long id) {
+        Employee employee = employeeRepository.findById(id).orElse(null);
+        employee.setSalary(employee.getSalary() + employee.getSalary() * 0.1);
+        employeeRepository.save(employee);
+    }
+
+}
--- a/spring-boot-ops/src/main/java/com/baeldung/toggle/ToggleApplication.java
+++ b/spring-boot-ops/src/main/java/com/baeldung/toggle/ToggleApplication.java
@@ -0,0 +1,15 @@
+package com.baeldung.toggle;
+
+import javax.annotation.security.RolesAllowed;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class ToggleApplication {
+    @RolesAllowed("*")
+    public static void main(String[] args) {
+        System.setProperty("security.basic.enabled", "false");
+        SpringApplication.run(ToggleApplication.class, args);
+    }
+}
--- a/spring-boot-ops/src/main/java/com/baeldung/toggle/ToggleConfiguration.java
+++ b/spring-boot-ops/src/main/java/com/baeldung/toggle/ToggleConfiguration.java
@@ -0,0 +1,20 @@
+package com.baeldung.toggle;
+
+import org.springframework.boot.autoconfigure.domain.EntityScan;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
+import org.togglz.core.manager.EnumBasedFeatureProvider;
+import org.togglz.core.spi.FeatureProvider;
+
+@Configuration
+@EnableJpaRepositories("com.baeldung.toggle")
+@EntityScan("com.baeldung.toggle")
+public class ToggleConfiguration {
+
+    @Bean
+    public FeatureProvider featureProvider() {
+        return new EnumBasedFeatureProvider(MyFeatures.class);
+    }
+
+}
--- a/spring-boot-ops/src/main/java/com/baeldung/webjar/TestController.java
+++ b/spring-boot-ops/src/main/java/com/baeldung/webjar/TestController.java
@@ -0,0 +1,15 @@
+package com.baeldung.webjar;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+
+@Controller
+public class TestController {
+
+    @GetMapping(value = "/")
+    public String welcome(Model model) {
+        return "index";
+    }
+
+}
--- a/spring-boot-ops/src/main/java/com/baeldung/webjar/WebjarsdemoApplication.java
+++ b/spring-boot-ops/src/main/java/com/baeldung/webjar/WebjarsdemoApplication.java
@@ -0,0 +1,12 @@
+package com.baeldung.webjar;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class WebjarsdemoApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(WebjarsdemoApplication.class, args);
+    }
+}
--- a/spring-boot-ops/src/main/java/org/baeldung/boot/Application.java
+++ b/spring-boot-ops/src/main/java/org/baeldung/boot/Application.java
@@ -0,0 +1,14 @@
+package org.baeldung.boot;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.ApplicationContext;
+
+@SpringBootApplication
+public class Application {
+    private static ApplicationContext applicationContext;
+
+    public static void main(String[] args) {
+        applicationContext = SpringApplication.run(Application.class, args);
+    }
+}
--- a/spring-boot-ops/src/main/java/org/baeldung/boot/config/WebConfig.java
+++ b/spring-boot-ops/src/main/java/org/baeldung/boot/config/WebConfig.java
@@ -0,0 +1,28 @@
+package org.baeldung.boot.config;
+
+import org.baeldung.boot.converter.GenericBigDecimalConverter;
+import org.baeldung.boot.converter.StringToEmployeeConverter;
+import org.baeldung.boot.converter.StringToEnumConverterFactory;
+import org.baeldung.boot.web.resolver.HeaderVersionArgumentResolver;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.format.FormatterRegistry;
+import org.springframework.web.method.support.HandlerMethodArgumentResolver;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+import java.util.List;
+
+@Configuration
+public class WebConfig implements WebMvcConfigurer {
+
+    @Override
+    public void addArgumentResolvers(final List<HandlerMethodArgumentResolver> argumentResolvers) {
+        argumentResolvers.add(new HeaderVersionArgumentResolver());
+    }
+
+    @Override
+    public void addFormatters(FormatterRegistry registry) {
+        registry.addConverter(new StringToEmployeeConverter());
+        registry.addConverterFactory(new StringToEnumConverterFactory());
+        registry.addConverter(new GenericBigDecimalConverter());
+    }
+}
--- a/spring-boot-ops/src/main/java/org/baeldung/boot/controller/GenericEntityController.java
+++ b/spring-boot-ops/src/main/java/org/baeldung/boot/controller/GenericEntityController.java
@@ -0,0 +1,58 @@
+package org.baeldung.boot.controller;
+
+import org.baeldung.boot.domain.GenericEntity;
+import org.baeldung.boot.domain.Modes;
+import org.baeldung.boot.web.resolver.Version;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.time.LocalDateTime;
+import java.util.ArrayList;
+import java.util.List;
+
+@RestController
+public class GenericEntityController {
+    private List<GenericEntity> entityList = new ArrayList<>();
+
+    {
+        entityList.add(new GenericEntity(1l, "entity_1"));
+        entityList.add(new GenericEntity(2l, "entity_2"));
+        entityList.add(new GenericEntity(3l, "entity_3"));
+        entityList.add(new GenericEntity(4l, "entity_4"));
+    }
+
+    @GetMapping("/entity/all")
+    public List<GenericEntity> findAll() {
+        return entityList;
+    }
+
+    @PostMapping("/entity")
+    public GenericEntity addEntity(GenericEntity entity) {
+        entityList.add(entity);
+        return entity;
+    }
+
+    @GetMapping("/entity/findby/{id}")
+    public GenericEntity findById(@PathVariable Long id) {
+        return entityList.stream().filter(entity -> entity.getId().equals(id)).findFirst().get();
+    }
+
+    @GetMapping("/entity/findbydate/{date}")
+    public GenericEntity findByDate(@PathVariable("date") LocalDateTime date) {
+        return entityList.stream().findFirst().get();
+    }
+
+    @GetMapping("/entity/findbymode/{mode}")
+    public GenericEntity findByEnum(@PathVariable("mode") Modes mode) {
+        return entityList.stream().findFirst().get();
+    }
+
+    @GetMapping("/entity/findbyversion")
+    public ResponseEntity findByVersion(@Version String version) {
+        return version != null ? new ResponseEntity(entityList.stream().findFirst().get(), HttpStatus.OK) : new ResponseEntity(HttpStatus.NOT_FOUND);
+    }
+}
--- a/spring-boot-ops/src/main/java/org/baeldung/boot/converter/GenericBigDecimalConverter.java
+++ b/spring-boot-ops/src/main/java/org/baeldung/boot/converter/GenericBigDecimalConverter.java
@@ -0,0 +1,34 @@
+package org.baeldung.boot.converter;
+
+import com.google.common.collect.ImmutableSet;
+import org.springframework.core.convert.TypeDescriptor;
+import org.springframework.core.convert.converter.GenericConverter;
+
+import java.math.BigDecimal;
+import java.util.Set;
+
+public class GenericBigDecimalConverter implements GenericConverter {
+    @Override
+    public Set<ConvertiblePair> getConvertibleTypes() {
+
+        ConvertiblePair[] pairs = new ConvertiblePair[] { new ConvertiblePair(Number.class, BigDecimal.class), new ConvertiblePair(String.class, BigDecimal.class) };
+
+        return ImmutableSet.copyOf(pairs);
+    }
+
+    @Override
+    public Object convert(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
+        if (sourceType.getType() == BigDecimal.class) {
+            return source;
+        }
+
+        if (sourceType.getType() == String.class) {
+            String number = (String) source;
+            return new BigDecimal(number);
+        } else {
+            Number number = (Number) source;
+            BigDecimal converted = new BigDecimal(number.doubleValue());
+            return converted.setScale(2, BigDecimal.ROUND_HALF_EVEN);
+        }
+    }
+}
--- a/spring-boot-ops/src/main/java/org/baeldung/boot/converter/StringToEmployeeConverter.java
+++ b/spring-boot-ops/src/main/java/org/baeldung/boot/converter/StringToEmployeeConverter.java
@@ -0,0 +1,13 @@
+package org.baeldung.boot.converter;
+
+import com.baeldung.toggle.Employee;
+import org.springframework.core.convert.converter.Converter;
+
+public class StringToEmployeeConverter implements Converter<String, Employee> {
+
+    @Override
+    public Employee convert(String from) {
+        String[] data = from.split(",");
+        return new Employee(Long.parseLong(data[0]), Double.parseDouble(data[1]));
+    }
+}
--- a/spring-boot-ops/src/main/java/org/baeldung/boot/converter/StringToEnumConverterFactory.java
+++ b/spring-boot-ops/src/main/java/org/baeldung/boot/converter/StringToEnumConverterFactory.java
@@ -0,0 +1,27 @@
+package org.baeldung.boot.converter;
+
+import org.springframework.core.convert.converter.Converter;
+import org.springframework.core.convert.converter.ConverterFactory;
+import org.springframework.stereotype.Component;
+
+@Component
+public class StringToEnumConverterFactory implements ConverterFactory<String, Enum> {
+
+    private static class StringToEnumConverter<T extends Enum> implements Converter<String, T> {
+
+        private Class<T> enumType;
+
+        public StringToEnumConverter(Class<T> enumType) {
+            this.enumType = enumType;
+        }
+
+        public T convert(String source) {
+            return (T) Enum.valueOf(this.enumType, source.trim());
+        }
+    }
+
+    @Override
+    public <T extends Enum> Converter<String, T> getConverter(final Class<T> targetType) {
+        return new StringToEnumConverter(targetType);
+    }
+}
--- a/spring-boot-ops/src/main/java/org/baeldung/boot/converter/StringToLocalDateTimeConverter.java
+++ b/spring-boot-ops/src/main/java/org/baeldung/boot/converter/StringToLocalDateTimeConverter.java
@@ -0,0 +1,16 @@
+package org.baeldung.boot.converter;
+
+import org.springframework.core.convert.converter.Converter;
+import org.springframework.stereotype.Component;
+
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+
+@Component
+public class StringToLocalDateTimeConverter implements Converter<String, LocalDateTime> {
+
+    @Override
+    public LocalDateTime convert(final String source) {
+        return LocalDateTime.parse(source, DateTimeFormatter.ISO_LOCAL_DATE_TIME);
+    }
+}
--- a/spring-boot-ops/src/main/java/org/baeldung/boot/converter/controller/StringToEmployeeConverterController.java
+++ b/spring-boot-ops/src/main/java/org/baeldung/boot/converter/controller/StringToEmployeeConverterController.java
@@ -0,0 +1,15 @@
+package org.baeldung.boot.converter.controller;
+
+import com.baeldung.toggle.Employee;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+@RestController
+@RequestMapping("/string-to-employee")
+public class StringToEmployeeConverterController {
+
+    @GetMapping
+    public ResponseEntity<Object> getStringToEmployee(@RequestParam("employee") Employee employee) {
+        return ResponseEntity.ok(employee);
+    }
+}
--- a/spring-boot-ops/src/main/java/org/baeldung/boot/domain/GenericEntity.java
+++ b/spring-boot-ops/src/main/java/org/baeldung/boot/domain/GenericEntity.java
@@ -0,0 +1,42 @@
+package org.baeldung.boot.domain;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+
+@Entity
+public class GenericEntity {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long id;
+    private String value;
+
+    public GenericEntity() {
+    }
+
+    public GenericEntity(String value) {
+        this.value = value;
+    }
+
+    public GenericEntity(Long id, String value) {
+        this.id = id;
+        this.value = value;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getValue() {
+        return value;
+    }
+
+    public void setValue(String value) {
+        this.value = value;
+    }
+}
--- a/spring-boot-ops/src/main/java/org/baeldung/boot/domain/Modes.java
+++ b/spring-boot-ops/src/main/java/org/baeldung/boot/domain/Modes.java
@@ -0,0 +1,6 @@
+package org.baeldung.boot.domain;
+
+public enum Modes {
+
+    ALPHA, BETA;
+}
--- a/spring-boot-ops/src/main/java/org/baeldung/boot/repository/GenericEntityRepository.java
+++ b/spring-boot-ops/src/main/java/org/baeldung/boot/repository/GenericEntityRepository.java
@@ -0,0 +1,7 @@
+package org.baeldung.boot.repository;
+
+import org.baeldung.boot.domain.GenericEntity;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface GenericEntityRepository extends JpaRepository<GenericEntity, Long> {
+}
--- a/spring-boot-ops/src/main/java/org/baeldung/boot/web/resolver/HeaderVersionArgumentResolver.java
+++ b/spring-boot-ops/src/main/java/org/baeldung/boot/web/resolver/HeaderVersionArgumentResolver.java
@@ -0,0 +1,26 @@
+package org.baeldung.boot.web.resolver;
+
+import org.springframework.core.MethodParameter;
+import org.springframework.stereotype.Component;
+import org.springframework.web.bind.support.WebDataBinderFactory;
+import org.springframework.web.context.request.NativeWebRequest;
+import org.springframework.web.method.support.HandlerMethodArgumentResolver;
+import org.springframework.web.method.support.ModelAndViewContainer;
+
+import javax.servlet.http.HttpServletRequest;
+
+@Component
+public class HeaderVersionArgumentResolver implements HandlerMethodArgumentResolver {
+
+    @Override
+    public boolean supportsParameter(final MethodParameter methodParameter) {
+        return methodParameter.getParameterAnnotation(Version.class) != null;
+    }
+
+    @Override
+    public Object resolveArgument(final MethodParameter methodParameter, final ModelAndViewContainer modelAndViewContainer, final NativeWebRequest nativeWebRequest, final WebDataBinderFactory webDataBinderFactory) throws Exception {
+        HttpServletRequest request = (HttpServletRequest) nativeWebRequest.getNativeRequest();
+
+        return request.getHeader("Version");
+    }
+}
--- a/spring-boot-ops/src/main/java/org/baeldung/boot/web/resolver/Version.java
+++ b/spring-boot-ops/src/main/java/org/baeldung/boot/web/resolver/Version.java
@@ -0,0 +1,11 @@
+package org.baeldung.boot.web.resolver;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.PARAMETER)
+public @interface Version {
+}
--- a/spring-boot-ops/src/main/java/org/baeldung/demo/DemoApplication.java
+++ b/spring-boot-ops/src/main/java/org/baeldung/demo/DemoApplication.java
@@ -0,0 +1,18 @@
+package org.baeldung.demo;
+
+import com.baeldung.graphql.GraphqlConfiguration;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+import org.springframework.context.annotation.Import;
+
+@SpringBootApplication
+@Import(GraphqlConfiguration.class)
+public class DemoApplication {
+
+    public static void main(String[] args) {
+        System.setProperty("spring.config.name", "demo");
+        SpringApplication.run(DemoApplication.class, args);
+    }
+
+}
--- a/spring-boot-ops/src/main/java/org/baeldung/demo/boottest/Employee.java
+++ b/spring-boot-ops/src/main/java/org/baeldung/demo/boottest/Employee.java
@@ -0,0 +1,43 @@
+package org.baeldung.demo.boottest;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.Table;
+import javax.validation.constraints.Size;
+
+@Entity
+@Table(name = "person")
+public class Employee {
+
+    public Employee() {
+    }
+
+    public Employee(String name) {
+        this.name = name;
+    }
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long id;
+
+    @Size(min = 3, max = 20)
+    private String name;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}
--- a/spring-boot-ops/src/main/java/org/baeldung/demo/boottest/EmployeeRepository.java
+++ b/spring-boot-ops/src/main/java/org/baeldung/demo/boottest/EmployeeRepository.java
@@ -0,0 +1,17 @@
+package org.baeldung.demo.boottest;
+
+import java.util.List;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+import org.springframework.transaction.annotation.Transactional;
+
+@Repository
+@Transactional
+public interface EmployeeRepository extends JpaRepository<Employee, Long> {
+
+    public Employee findByName(String name);
+
+    public List<Employee> findAll();
+
+}
--- a/spring-boot-ops/src/main/java/org/baeldung/demo/boottest/EmployeeRestController.java
+++ b/spring-boot-ops/src/main/java/org/baeldung/demo/boottest/EmployeeRestController.java
@@ -0,0 +1,33 @@
+package org.baeldung.demo.boottest;
+
+import java.util.List;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/api")
+public class EmployeeRestController {
+
+    @Autowired
+    private EmployeeService employeeService;
+
+    @PostMapping("/employees")
+    public ResponseEntity<Employee> createEmployee(@RequestBody Employee employee) {
+        HttpStatus status = HttpStatus.CREATED;
+        Employee saved = employeeService.save(employee);
+        return new ResponseEntity<>(saved, status);
+    }
+
+    @GetMapping("/employees")
+    public List<Employee> getAllEmployees() {
+        return employeeService.getAllEmployees();
+    }
+
+}
--- a/spring-boot-ops/src/main/java/org/baeldung/demo/boottest/EmployeeService.java
+++ b/spring-boot-ops/src/main/java/org/baeldung/demo/boottest/EmployeeService.java
@@ -0,0 +1,16 @@
+package org.baeldung.demo.boottest;
+
+import java.util.List;
+
+public interface EmployeeService {
+
+    public Employee getEmployeeById(Long id);
+
+    public Employee getEmployeeByName(String name);
+
+    public List<Employee> getAllEmployees();
+
+    public boolean exists(String email);
+
+    public Employee save(Employee employee);
+}
--- a/spring-boot-ops/src/main/java/org/baeldung/demo/boottest/EmployeeServiceImpl.java
+++ b/spring-boot-ops/src/main/java/org/baeldung/demo/boottest/EmployeeServiceImpl.java
@@ -0,0 +1,43 @@
+package org.baeldung.demo.boottest;
+
+import java.util.List;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Service
+@Transactional
+public class EmployeeServiceImpl implements EmployeeService {
+
+    @Autowired
+    private EmployeeRepository employeeRepository;
+
+    @Override
+    public Employee getEmployeeById(Long id) {
+        return employeeRepository.findById(id).orElse(null);
+    }
+
+    @Override
+    public Employee getEmployeeByName(String name) {
+        return employeeRepository.findByName(name);
+    }
+
+    @Override
+    public boolean exists(String name) {
+        if (employeeRepository.findByName(name) != null) {
+            return true;
+        }
+        return false;
+    }
+
+    @Override
+    public Employee save(Employee employee) {
+        return employeeRepository.save(employee);
+    }
+
+    @Override
+    public List<Employee> getAllEmployees() {
+        return employeeRepository.findAll();
+    }
+}
--- a/spring-boot-ops/src/main/java/org/baeldung/demo/components/FooService.java
+++ b/spring-boot-ops/src/main/java/org/baeldung/demo/components/FooService.java
@@ -0,0 +1,21 @@
+package org.baeldung.demo.components;
+
+import org.baeldung.demo.model.Foo;
+import org.baeldung.demo.repository.FooRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+@Component
+public class FooService {
+
+    @Autowired
+    private FooRepository fooRepository;
+
+    public Foo getFooWithId(Integer id) throws Exception {
+        return fooRepository.findById(id).orElse(null);
+    }
+
+    public Foo getFooWithName(String name) {
+        return fooRepository.findByName(name);
+    }
+}
--- a/spring-boot-ops/src/main/java/org/baeldung/demo/exceptions/CommonException.java
+++ b/spring-boot-ops/src/main/java/org/baeldung/demo/exceptions/CommonException.java
@@ -0,0 +1,13 @@
+package org.baeldung.demo.exceptions;
+
+public class CommonException extends RuntimeException {
+
+    /**
+     * 
+     */
+    private static final long serialVersionUID = 3080004140659213332L;
+
+    public CommonException(String message) {
+        super(message);
+    }
+}
--- a/spring-boot-ops/src/main/java/org/baeldung/demo/exceptions/FooNotFoundException.java
+++ b/spring-boot-ops/src/main/java/org/baeldung/demo/exceptions/FooNotFoundException.java
@@ -0,0 +1,13 @@
+package org.baeldung.demo.exceptions;
+
+public class FooNotFoundException extends RuntimeException {
+
+    /**
+     * 
+     */
+    private static final long serialVersionUID = 9042200028456133589L;
+
+    public FooNotFoundException(String message) {
+        super(message);
+    }
+}
--- a/spring-boot-ops/src/main/java/org/baeldung/demo/model/Foo.java
+++ b/spring-boot-ops/src/main/java/org/baeldung/demo/model/Foo.java
@@ -0,0 +1,45 @@
+package org.baeldung.demo.model;
+
+import java.io.Serializable;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+
+@Entity
+public class Foo implements Serializable {
+    private static final long serialVersionUID = 1L;
+    @Id
+    @GeneratedValue
+    private Integer id;
+    private String name;
+
+    public Foo() {
+    }
+
+    public Foo(String name) {
+        this.name = name;
+    }
+
+    public Foo(Integer id, String name) {
+        super();
+        this.id = id;
+        this.name = name;
+    }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}
--- a/spring-boot-ops/src/main/java/org/baeldung/demo/repository/FooRepository.java
+++ b/spring-boot-ops/src/main/java/org/baeldung/demo/repository/FooRepository.java
@@ -0,0 +1,8 @@
+package org.baeldung.demo.repository;
+
+import org.baeldung.demo.model.Foo;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface FooRepository extends JpaRepository<Foo, Integer> {
+    public Foo findByName(String name);
+}
--- a/spring-boot-ops/src/main/java/org/baeldung/demo/service/FooController.java
+++ b/spring-boot-ops/src/main/java/org/baeldung/demo/service/FooController.java
@@ -0,0 +1,26 @@
+package org.baeldung.demo.service;
+
+import org.baeldung.demo.components.FooService;
+import org.baeldung.demo.model.Foo;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class FooController {
+
+    @Autowired
+    private FooService fooService;
+
+    @GetMapping("/{id}")
+    public Foo getFooWithId(@PathVariable Integer id) throws Exception {
+        return fooService.getFooWithId(id);
+    }
+
+    @GetMapping("/")
+    public Foo getFooWithName(@RequestParam String name) throws Exception {
+        return fooService.getFooWithName(name);
+    }
+}
--- a/spring-boot-ops/src/main/resources/application.properties
+++ b/spring-boot-ops/src/main/resources/application.properties
--- a/spring-boot-ops/src/main/resources/templates/customer.html
+++ b/spring-boot-ops/src/main/resources/templates/customer.html
@@ -0,0 +1,16 @@
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
+<title>Customer Page</title>
+<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.0/jquery.min.js"></script>
+</head>
+<body>
+<br />
+<form action="customer" method="POST">
+Contact Info: <input type="text" name="contactInfo" /> <br />
+<input type="submit" value="Submit" />
+</form>
+<br /><br />
+<span th:text="${message}"></span><br />
+</body>
+</html>
--- a/spring-boot-ops/src/main/resources/templates/customers.html
+++ b/spring-boot-ops/src/main/resources/templates/customers.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<html xmlns:th="http://www.thymeleaf.org">
+<head th:include="layout :: headerFragment">
+</head>
+<body>
+	<div id="container">
+		<h1>
+			Hello, <span th:text="${username}">--name--</span>.
+		</h1>
+		<table class="table table-striped">
+			<thead>
+				<tr>
+					<th>ID</th>
+					<th>Name</th>
+					<th>Address</th>
+					<th>Service Rendered</th>
+				</tr>
+			</thead>
+			<tbody>
+				<tr th:each="customer : ${customers}">
+					<td th:text="${customer.id}">Text ...</td>
+					<td th:text="${customer.name}">Text ...</td>
+					<td th:text="${customer.address}">Text ...</td>
+					<td th:text="${customer.serviceRendered}">Text...</td>
+				</tr>
+			</tbody>
+		</table>
+		<div id="pagefoot" th:include="layout :: footerFragment">Footer
+		</div>
+	</div>
+	<!-- container -->
+</body>
+</html>
--- a/spring-boot-ops/src/main/resources/templates/displayallbeans.html
+++ b/spring-boot-ops/src/main/resources/templates/displayallbeans.html
@@ -0,0 +1,10 @@
+<html>
+    <head>
+        <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
+        <title>Baeldung</title>
+    </head>
+    <body>
+        <h2 th:text="${header}"></h2>
+        <p th:text="${message}"></p>
+    </body>
+</html>
--- a/spring-boot-ops/src/main/resources/templates/error-404.html
+++ b/spring-boot-ops/src/main/resources/templates/error-404.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous" />
+	<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css" />
+</head>
+<body>
+<div class="container">
+<div class="jumbotron" >
+<h1 class="text-center"><i class="fa fa-frown-o"> </i>   Sorry, we couldn't find the page you were looking for. </h1>
+<p class="text-center"><a class="btn btn-primary" href="/"><i class="fa fa-home"></i>Go Home</a></p>
+</div></div>
+</body>
+</html>
--- a/spring-boot-ops/src/main/resources/templates/error-500.html
+++ b/spring-boot-ops/src/main/resources/templates/error-500.html
@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous" />
+	<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css" />
+</head>
+<body>
+<div class="container">
+<div class="jumbotron" >
+<h1 class="text-center"><i class="fa fa-frown-o"> </i>   Sorry, something went wrong! </h1>
+
+<h2 class="text-center">We're fixing it.</h2>
+<p class="text-center"><a class="btn btn-primary" href="/"><i class="fa fa-home"></i>Go Home</a></p>
+</div></div>
+</body>
+</html>
--- a/spring-boot-ops/src/main/resources/templates/error.html
+++ b/spring-boot-ops/src/main/resources/templates/error.html
@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous" />
+	<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css" />
+</head>
+<body>
+<div class="container">
+<div class="jumbotron" >
+<h1 class="text-center"><i class="fa fa-frown-o"> </i>   Something went wrong! </h1>
+
+<h2 class="text-center">Our Engineers are on it.</h2>
+<p class="text-center"><a class="btn btn-primary" href="/"><i class="fa fa-home"></i>Go Home</a></p>
+</div></div>
+</body>
+</html>
--- a/spring-boot-ops/src/main/resources/templates/error/404.html
+++ b/spring-boot-ops/src/main/resources/templates/error/404.html
@@ -0,0 +1,8 @@
+<html>
+	<head>
+		<title>RESOURCE NOT FOUND</title>
+	</head>
+	<body>
+		<h1>404 RESOURCE NOT FOUND</h1>
+	</body>
+</html>
--- a/spring-boot-ops/src/main/resources/templates/external.html
+++ b/spring-boot-ops/src/main/resources/templates/external.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html xmlns:th="http://www.thymeleaf.org">
+<head th:include="layout :: headerFragment">
+</head>
+<body>
+	<div class="container">
+		<div class="jumbotron text-center">
+			<h1>Customer Portal</h1>
+		</div>
+		<div>
+			<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nam
+				erat lectus, vehicula feugiat ultricies at, tempus sed ante. Cras
+				arcu erat, lobortis vitae quam et, mollis pharetra odio. Nullam sit
+				amet congue ipsum. Nunc dapibus odio ut ligula venenatis porta non
+				id dui. Duis nec tempor tellus. Suspendisse id blandit ligula, sit
+				amet varius mauris. Nulla eu eros pharetra, tristique dui quis,
+				vehicula libero. Aenean a neque sit amet tellus porttitor rutrum nec
+				at leo.</p>
+
+			<h2>Existing Customers</h2>
+			<div class="well">
+				<b>Enter the intranet: </b><a th:href="@{/customers}">customers</a>
+			</div>
+		</div>
+		<div id="pagefoot" th:include="layout :: footerFragment">Footer
+		</div>
+	</div>
+	<!-- container -->
+
+</body>
+</html>
--- a/spring-boot-ops/src/main/resources/templates/index.html
+++ b/spring-boot-ops/src/main/resources/templates/index.html
@@ -0,0 +1,19 @@
+<html>
+<head>
+	<title>WebJars Demo</title>
+	<link rel="stylesheet" href="/webjars/bootstrap/3.3.7-1/css/bootstrap.min.css" />
+</head>
+<body>
+	<h1>Welcome Home</h1>
+	<div class="container"><br/>
+		<div class="alert alert-success">
+		  <a href="#" class="close" data-dismiss="alert" aria-label="close">×</a>
+		  <strong>Success!</strong> It is working as we expected.
+		</div>
+	</div>
+
+<script src="/webjars/jquery/3.1.1/jquery.min.js"></script>
+<script src="/webjars/bootstrap/3.3.7-1/js/bootstrap.min.js"></script>
+
+</body>
+</html>
--- a/spring-boot-ops/src/main/resources/templates/international.html
+++ b/spring-boot-ops/src/main/resources/templates/international.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<html xmlns:th="http://www.thymeleaf.org">
+<head>
+<meta charset="ISO-8859-1" />
+<title>Home</title>
+<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
+<script src="internationalization.js"></script>
+</head>
+<body>
+<h1 th:text="#{greeting}"></h1>
+
+<br /><br />
+<span th:text="#{lang.change}"></span>:
+<select id="locales">
+    <option value=""></option>
+    <option value="en" th:text="#{lang.eng}"></option>
+    <option value="fr" th:text="#{lang.fr}"></option>
+</select>
+</body>
+</html>
--- a/spring-boot-ops/src/main/resources/templates/layout.html
+++ b/spring-boot-ops/src/main/resources/templates/layout.html
@@ -0,0 +1,18 @@
+
+<head th:fragment="headerFragment">
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+<title>Customer Portal</title>
+<link
+	href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css"
+	rel="stylesheet"
+	integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u"
+	crossorigin="anonymous"></link>
+<link
+	href="https://cdn.datatables.net/1.10.16/css/jquery.dataTables.min.css"
+	rel="stylesheet"></link>
+</head>
+
+<div id="pagefoot" th:fragment="footerFragment">
+	<p>Document last modified 2017/10/23.</p>
+	<p>Copyright: Lorem Ipsum</p>
+</div>
--- a/spring-boot-ops/src/main/resources/templates/other.html
+++ b/spring-boot-ops/src/main/resources/templates/other.html
@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<html xmlns:th="http://www.thymeleaf.org">
+<head>
+<meta charset="UTF-8"/>
+<title>Spring Utils Demo</title>
+<style type="text/css">
+.param{
+	color:green;
+	font-style: italic;
+}
+</style>
+</head>
+<body>
+	Parameter set by you: <p th:text="${parameter}" class="param"/>
+</body>
+</html>
--- a/spring-boot-ops/src/main/resources/templates/utils.html
+++ b/spring-boot-ops/src/main/resources/templates/utils.html
@@ -0,0 +1,23 @@
+<!DOCTYPE html>
+<html xmlns:th="http://www.thymeleaf.org">
+<head>
+<meta charset="UTF-8"/>
+<title>Spring Utils Demo</title>
+<style type="text/css">
+.param{
+	color:green;
+	font-style: italic;
+}
+</style>
+</head>
+<body>
+<form action="setParam" method="POST">
+	<h3>Set Parameter:  </h3>
+	<p th:text="${parameter}" class="param"/>
+	<input type="text" name="param" id="param"/>
+	<input type="submit" value="SET"/>
+</form>
+<br/>
+<a href="other">Another Page</a>
+</body>
+</html>
--- a/spring-boot-ops/src/test/java/com/baeldung/shutdown/ShutdownApplicationIntegrationTest.java
+++ b/spring-boot-ops/src/test/java/com/baeldung/shutdown/ShutdownApplicationIntegrationTest.java
@@ -0,0 +1,40 @@
+package com.baeldung.shutdown;
+
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+import org.junit.Before;
+import org.junit.Ignore;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+import org.springframework.web.context.WebApplicationContext;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.MOCK, classes = Application.class)
+@AutoConfigureMockMvc
+public class ShutdownApplicationIntegrationTest {
+
+    @Autowired
+    private MockMvc mockMvc;
+
+    @Autowired
+    private WebApplicationContext wac;
+
+    @Before
+    public void setup() {
+        this.mockMvc = MockMvcBuilders.webAppContextSetup(this.wac).build();
+    }
+
+    @Test
+    @Ignore
+    public void givenBootApp_whenShutdownEndpoint_thenExit() throws Exception {
+
+        mockMvc.perform(post("/shutdown")).andExpect(status().isOk());
+    }
+}
--- a/spring-boot-ops/src/test/java/com/baeldung/webjar/WebjarsdemoApplicationIntegrationTest.java
+++ b/spring-boot-ops/src/test/java/com/baeldung/webjar/WebjarsdemoApplicationIntegrationTest.java
@@ -0,0 +1,18 @@
+package com.baeldung.webjar;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.web.WebAppConfiguration;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringBootTest(classes = WebjarsdemoApplication.class)
+@WebAppConfiguration
+public class WebjarsdemoApplicationIntegrationTest {
+
+    @Test
+    public void contextLoads() {
+    }
+
+}
--- a/spring-boot-ops/src/test/java/org/baeldung/SpringBootApplicationIntegrationTest.java
+++ b/spring-boot-ops/src/test/java/org/baeldung/SpringBootApplicationIntegrationTest.java
@@ -0,0 +1,69 @@
+package org.baeldung;
+
+import org.baeldung.boot.Application;
+import org.baeldung.boot.domain.Modes;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.MediaType;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.web.WebAppConfiguration;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
+import org.springframework.test.web.servlet.result.MockMvcResultMatchers;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+import org.springframework.web.context.WebApplicationContext;
+
+import java.nio.charset.Charset;
+
+import static org.hamcrest.Matchers.equalTo;
+import static org.hamcrest.Matchers.hasSize;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringBootTest(classes = Application.class)
+@WebAppConfiguration
+public class SpringBootApplicationIntegrationTest {
+
+    @Autowired
+    private WebApplicationContext webApplicationContext;
+
+    private MockMvc mockMvc;
+
+    @Before
+    public void setupMockMvc() {
+        mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).build();
+    }
+
+    @Test
+    public void givenRequestHasBeenMade_whenMeetsAllOfGivenConditions_thenCorrect() throws Exception {
+        MediaType contentType = new MediaType(MediaType.APPLICATION_JSON.getType(), MediaType.APPLICATION_JSON.getSubtype(), Charset.forName("utf8"));
+
+        mockMvc.perform(MockMvcRequestBuilders.get("/entity/all")).andExpect(MockMvcResultMatchers.status().isOk()).andExpect(MockMvcResultMatchers.content().contentType(contentType)).andExpect(jsonPath("$", hasSize(4)));
+    }
+
+    @Test
+    public void givenRequestHasBeenMade_whenMeetsFindByDateOfGivenConditions_thenCorrect() throws Exception {
+        MediaType contentType = new MediaType(MediaType.APPLICATION_JSON.getType(), MediaType.APPLICATION_JSON.getSubtype(), Charset.forName("utf8"));
+
+        mockMvc.perform(MockMvcRequestBuilders.get("/entity/findbydate/{date}", "2011-12-03T10:15:30")).andExpect(MockMvcResultMatchers.status().isOk()).andExpect(MockMvcResultMatchers.content().contentType(contentType))
+                .andExpect(jsonPath("$.id", equalTo(1)));
+    }
+
+    @Test
+    public void givenRequestHasBeenMade_whenMeetsFindByModeOfGivenConditions_thenCorrect() throws Exception {
+        MediaType contentType = new MediaType(MediaType.APPLICATION_JSON.getType(), MediaType.APPLICATION_JSON.getSubtype(), Charset.forName("utf8"));
+
+        mockMvc.perform(MockMvcRequestBuilders.get("/entity/findbymode/{mode}", Modes.ALPHA.name())).andExpect(MockMvcResultMatchers.status().isOk()).andExpect(MockMvcResultMatchers.content().contentType(contentType)).andExpect(jsonPath("$.id", equalTo(1)));
+    }
+
+    @Test
+    public void givenRequestHasBeenMade_whenMeetsFindByVersionOfGivenConditions_thenCorrect() throws Exception {
+        MediaType contentType = new MediaType(MediaType.APPLICATION_JSON.getType(), MediaType.APPLICATION_JSON.getSubtype(), Charset.forName("utf8"));
+
+        mockMvc.perform(MockMvcRequestBuilders.get("/entity/findbyversion").header("Version", "1.0.0")).andExpect(MockMvcResultMatchers.status().isOk()).andExpect(MockMvcResultMatchers.content().contentType(contentType))
+                .andExpect(jsonPath("$.id", equalTo(1)));
+    }
+}
--- a/spring-boot-ops/src/test/java/org/baeldung/SpringBootJPAIntegrationTest.java
+++ b/spring-boot-ops/src/test/java/org/baeldung/SpringBootJPAIntegrationTest.java
@@ -0,0 +1,28 @@
+package org.baeldung;
+
+import org.baeldung.boot.Application;
+import org.baeldung.boot.domain.GenericEntity;
+import org.baeldung.boot.repository.GenericEntityRepository;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(classes = Application.class)
+public class SpringBootJPAIntegrationTest {
+    @Autowired
+    private GenericEntityRepository genericEntityRepository;
+
+    @Test
+    public void givenGenericEntityRepository_whenSaveAndRetreiveEntity_thenOK() {
+        GenericEntity genericEntity = genericEntityRepository.save(new GenericEntity("test"));
+        GenericEntity foundEntity = genericEntityRepository.findById(genericEntity.getId()).orElse(null);
+        assertNotNull(foundEntity);
+        assertEquals(genericEntity.getValue(), foundEntity.getValue());
+    }
+}
--- a/spring-boot-ops/src/test/java/org/baeldung/SpringBootMailIntegrationTest.java
+++ b/spring-boot-ops/src/test/java/org/baeldung/SpringBootMailIntegrationTest.java
@@ -0,0 +1,80 @@
+package org.baeldung;
+
+import org.baeldung.boot.Application;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.mail.SimpleMailMessage;
+import org.springframework.mail.javamail.JavaMailSender;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.subethamail.wiser.Wiser;
+import org.subethamail.wiser.WiserMessage;
+
+import javax.mail.MessagingException;
+import java.io.IOException;
+import java.util.List;
+
+import static org.hamcrest.Matchers.hasSize;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertThat;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringBootTest(classes = Application.class)
+public class SpringBootMailIntegrationTest {
+    @Autowired
+    private JavaMailSender javaMailSender;
+
+    private Wiser wiser;
+
+    private String userTo = "user2@localhost";
+    private String userFrom = "user1@localhost";
+    private String subject = "Test subject";
+    private String textMail = "Text subject mail";
+
+    @Before
+    public void setUp() throws Exception {
+        final int TEST_PORT = 8025;
+        wiser = new Wiser(TEST_PORT);
+        wiser.start();
+    }
+
+    @After
+    public void tearDown() throws Exception {
+        wiser.stop();
+    }
+
+    @Test
+    public void givenMail_whenSendAndReceived_thenCorrect() throws Exception {
+        SimpleMailMessage message = composeEmailMessage();
+        javaMailSender.send(message);
+        List<WiserMessage> messages = wiser.getMessages();
+
+        assertThat(messages, hasSize(1));
+        WiserMessage wiserMessage = messages.get(0);
+        assertEquals(userFrom, wiserMessage.getEnvelopeSender());
+        assertEquals(userTo, wiserMessage.getEnvelopeReceiver());
+        assertEquals(subject, getSubject(wiserMessage));
+        assertEquals(textMail, getMessage(wiserMessage));
+    }
+
+    private String getMessage(WiserMessage wiserMessage) throws MessagingException, IOException {
+        return wiserMessage.getMimeMessage().getContent().toString().trim();
+    }
+
+    private String getSubject(WiserMessage wiserMessage) throws MessagingException {
+        return wiserMessage.getMimeMessage().getSubject();
+    }
+
+    private SimpleMailMessage composeEmailMessage() {
+        SimpleMailMessage mailMessage = new SimpleMailMessage();
+        mailMessage.setTo(userTo);
+        mailMessage.setReplyTo(userFrom);
+        mailMessage.setFrom(userFrom);
+        mailMessage.setSubject(subject);
+        mailMessage.setText(textMail);
+        return mailMessage;
+    }
+}
--- a/spring-boot-ops/src/test/resources/application-integrationtest.properties
+++ b/spring-boot-ops/src/test/resources/application-integrationtest.properties
@@ -0,0 +1,4 @@
+spring.datasource.url=jdbc:mysql://localhost:3306/employee_int_test
+spring.datasource.username=root
+spring.datasource.password=root
+
--- a/spring-boot-ops/src/test/resources/application.properties
+++ b/spring-boot-ops/src/test/resources/application.properties
@@ -0,0 +1,9 @@
+spring.mail.host=localhost
+spring.mail.port=8025
+spring.mail.properties.mail.smtp.auth=false
+
+security.basic.enabled=false
+
+management.endpoints.web.exposure.include=*
+management.endpoint.shutdown.enabled=true
+endpoints.shutdown.enabled=true