Separate Initialization Logic

customer-api-provider/src/main/java/de/schulung/sample/quarkus/domain/CustomersService.java

@@ -4,8 +4,6 @@
 import jakarta.validation.Valid;
 import jakarta.validation.constraints.NotNull;
 
-import java.time.LocalDate;
-import java.time.Month;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Optional;
@@ -17,15 +15,6 @@ public class CustomersService {
 
   private final Map<UUID, Customer> customers = new HashMap<>();
 
-  { // TODO replace this?
-    var customer = Customer.builder()
-      .uuid(UUID.randomUUID())
-      .name("Tom")
-      .birthdate(LocalDate.of(2000, Month.DECEMBER, 6))
-      .build();
-    customers.put(customer.getUuid(), customer);
-  }
-
   public Stream<Customer> getAll() {
     return this.customers
       .values()

customer-api-provider/src/main/java/de/schulung/sample/quarkus/domain/CustomersServiceInitializer.java

@@ -0,0 +1,25 @@
+package de.schulung.sample.quarkus.domain;
+
+import io.quarkus.runtime.Startup;
+import jakarta.enterprise.context.Dependent;
+import lombok.RequiredArgsConstructor;
+
+import java.time.LocalDate;
+import java.time.Month;
+
+@Dependent // destroy object immediately
+@RequiredArgsConstructor
+public class CustomersServiceInitializer {
+
+  private final CustomersService service;
+
+  @Startup
+  public void initializeData() {
+    var customer = Customer.builder()
+      .name("Tom")
+      .birthdate(LocalDate.of(2000, Month.DECEMBER, 6))
+      .build();
+    service.createCustomer(customer);
+  }
+
+}

customer-api-provider/src/test/java/de/schulung/sample/quarkus/domain/CustomersServiceInitializerTests.java

@@ -0,0 +1,22 @@
+package de.schulung.sample.quarkus.domain;
+
+import io.quarkus.test.junit.QuarkusTest;
+import jakarta.inject.Inject;
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@QuarkusTest
+public class CustomersServiceInitializerTests {
+
+  @Inject
+  CustomersService service;
+
+  @Test
+  void shouldHaveAtLeastOneCustomer() {
+    assertThat(service.getAll())
+      .hasAtLeastOneElementOfType(Customer.class);
+  }
+
+
+}