[BAEL-5894] Add Java code for Gatling perf test

testing-modules/gatling-java/src/main/java/org/baeldung/Address.java

@@ -0,0 +1,13 @@
+package org.baeldung;
+
+import lombok.Builder;
+import lombok.Data;
+
+@Builder
+@Data
+public class Address {
+    private String postCode;
+    private String Street;
+    private String houseNo;
+    private String city;
+}

testing-modules/gatling-java/src/main/java/org/baeldung/Application.java

@@ -0,0 +1,12 @@
+package org.baeldung;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+}

testing-modules/gatling-java/src/main/java/org/baeldung/Employee.java

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+package org.baeldung;
+
+import java.util.Set;
+
+import lombok.Builder;
+import lombok.Data;
+
+@Data
+@Builder
+public class Employee {
+    private String empName;
+    private Address address;
+    private String id;
+    private Set<String> projects;
+
+}

testing-modules/gatling-java/src/main/java/org/baeldung/EmployeeController.java

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+package org.baeldung;
+
+import java.net.URI;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+import java.util.UUID;
+import java.util.concurrent.ThreadLocalRandom;
+
+import org.springframework.http.MediaType;
+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.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.util.UriComponentsBuilder;
+
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
+@RestController
+@RequestMapping("/api/employees")
+public class EmployeeController {
+
+    @GetMapping(produces = { MediaType.APPLICATION_JSON_VALUE })
+    public List<Employee> getAllEmployees() {
+        return createEmployees();
+    }
+
+    @GetMapping("/{id}")
+    public Employee getEmployeeWithId(@PathVariable("id") Long id) {
+        log.info("Getting employee with ID '{}'", id);
+
+        List<Employee> allEmployees = createEmployees();
+        return allEmployees.get(ThreadLocalRandom.current()
+          .nextInt(0, allEmployees.size()));
+    }
+
+    @PostMapping(consumes = { MediaType.APPLICATION_JSON_VALUE })
+    public ResponseEntity<Void> addEmployee(@RequestBody EmployeeCreationRequest request, UriComponentsBuilder uriComponentsBuilder) {
+
+        log.info("Creating new employee with employeeName: {}", request.getEmpName());
+
+        URI location = uriComponentsBuilder.path("/api/employees/{id}")
+          .buildAndExpand("99")
+          .toUri();
+        return ResponseEntity.created(location)
+          .build();
+    }
+
+    private List<Employee> createEmployees() {
+
+        Set<String> projects = new HashSet<String>();
+        projects.add("proj1");
+        projects.add("proj2");
+
+        Employee employee1 = Employee.builder()
+          .id(UUID.randomUUID()
+            .toString())
+          .address(Address.builder()
+            .houseNo("1")
+            .city("London")
+            .postCode("HP17")
+            .build())
+          .projects(projects)
+          .empName("Andy")
+          .build();
+
+        Employee employee2 = Employee.builder()
+          .id(UUID.randomUUID()
+            .toString())
+          .address(Address.builder()
+            .houseNo("2")
+            .city("Cardiff")
+            .postCode("CF12")
+            .build())
+          .projects(projects)
+          .empName("Bob")
+          .build();
+
+        Employee employee3 = Employee.builder()
+          .id(UUID.randomUUID()
+            .toString())
+          .address(Address.builder()
+            .houseNo("4")
+            .city("Burmingham")
+            .postCode("BA4")
+            .build())
+          .projects(projects)
+          .empName("Clive")
+          .build();
+
+        return Arrays.asList(employee1, employee2, employee3);
+
+    }
+}

testing-modules/gatling-java/src/main/java/org/baeldung/EmployeeCreationRequest.java

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+package org.baeldung;
+
+public class EmployeeCreationRequest {
+
+    private String empName;
+
+    private String empNumber;
+
+    public String getEmpName() {
+        return empName;
+    }
+
+    public void setEmpName(String empName) {
+        this.empName = empName;
+    }
+
+    @Override
+    public String toString() {
+        return "org.baeldung.EmployeeCreationRequest{" + "employeename='" + empName + '\'' + '}';
+    }
+
+    public String getEmpNumber() {
+        return empNumber;
+    }
+
+    public void setEmpNumber(String empNumber) {
+        this.empNumber = empNumber;
+    }
+}