Prepare Domain for Persistence Layer.

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

@@ -1,16 +1,14 @@
 package de.schulung.sample.quarkus.domain;
 
 import de.schulung.sample.quarkus.domain.events.CustomerCreatedEvent;
-import de.schulung.sample.quarkus.shared.interceptors.LogPerformance;
 import de.schulung.sample.quarkus.shared.interceptors.FireEvent;
+import de.schulung.sample.quarkus.shared.interceptors.LogPerformance;
 import jakarta.enterprise.context.ApplicationScoped;
 import jakarta.validation.Valid;
 import jakarta.validation.constraints.NotNull;
 import lombok.RequiredArgsConstructor;
 import org.jboss.logging.Logger;
 
-import java.util.HashMap;
-import java.util.Map;
 import java.util.Optional;
 import java.util.UUID;
 import java.util.stream.Stream;
@@ -19,36 +17,35 @@
 @RequiredArgsConstructor
 public class CustomersService {
 
-  private final Map<UUID, Customer> customers = new HashMap<>();
+  private final CustomersSink sink;
 
   public Stream<Customer> getAll() {
-    return this.customers
-      .values()
-      .stream();
+    return this.sink.findAll();
   }
 
   public Stream<Customer> getByState(@NotNull Customer.CustomerState state) {
-    return this.getAll()
-      .filter(c -> c.getState() == state);
+    return this.sink.findByState(state);
   }
 
   @LogPerformance(Logger.Level.DEBUG)
   @FireEvent(CustomerCreatedEvent.class)
   public void createCustomer(@Valid Customer customer) {
-    customer.setUuid(UUID.randomUUID());
-    customers.put(customer.getUuid(), customer);
+    this.sink.save(customer);
   }
 
   public Optional<Customer> getByUuid(@NotNull UUID uuid) {
-    return Optional.ofNullable(customers.get(uuid));
+    return this.sink.findByUuid(uuid);
   }
 
   public boolean exists(@NotNull UUID uuid) {
-    return customers.containsKey(uuid);
+    return this.sink.exists(uuid);
   }
 
   public boolean delete(@NotNull UUID uuid) {
-    return customers.remove(uuid) != null;
+    return this.sink.delete(uuid);
   }
 
+  public long count() {
+    return this.sink.count();
+  }
 }

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

@@ -61,11 +61,13 @@ public static class InitialCustomerConfigProvider {
 
   @Startup
   public void initializeData() {
-    var customer = Customer.builder()
-      .name(customerConfig.getName())
-      .birthdate(LocalDate.parse(customerConfig.getBirthdate()))
-      .build();
-    service.createCustomer(customer);
+    if(service.count() < 1) {
+      var customer = Customer.builder()
+        .name(customerConfig.getName())
+        .birthdate(LocalDate.parse(customerConfig.getBirthdate()))
+        .build();
+      service.createCustomer(customer);
+    }
   }
 
 }

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

@@ -0,0 +1,36 @@
+package de.schulung.sample.quarkus.domain;
+
+import java.util.Optional;
+import java.util.UUID;
+import java.util.stream.Stream;
+
+public interface CustomersSink {
+
+  Stream<Customer> findAll();
+
+  default Stream<Customer> findByState(Customer.CustomerState state) {
+    return this
+      .findAll()
+      .filter(c -> c.getState() == state);
+  }
+
+  default Optional<Customer> findByUuid(UUID uuid) {
+    return this
+      .findAll()
+      .filter(c -> c.getUuid().equals(uuid))
+      .findFirst();
+  }
+
+  void save(Customer customer);
+
+  boolean delete(UUID uuid);
+
+  default boolean exists(UUID uuid) {
+    return this
+      .findByUuid(uuid)
+      .isPresent();
+  }
+
+  long count();
+
+}

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

@@ -0,0 +1,52 @@
+package de.schulung.sample.quarkus.domain;
+
+import io.quarkus.arc.DefaultBean;
+import jakarta.enterprise.context.ApplicationScoped;
+import jakarta.enterprise.inject.Typed;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Optional;
+import java.util.UUID;
+import java.util.stream.Stream;
+
+@ApplicationScoped
+@Typed(CustomersSink.class)
+@DefaultBean
+public class CustomersSinkInMemoryImpl implements CustomersSink {
+
+  private final Map<UUID, Customer> customers = new HashMap<>();
+
+  @Override
+  public Stream<Customer> findAll() {
+    return this.customers
+      .values()
+      .stream();
+  }
+
+  @Override
+  public Optional<Customer> findByUuid(UUID uuid) {
+    return Optional.ofNullable(customers.get(uuid));
+  }
+
+  @Override
+  public void save(Customer customer) {
+    customer.setUuid(UUID.randomUUID());
+    customers.put(customer.getUuid(), customer);
+  }
+
+  @Override
+  public boolean delete(UUID uuid) {
+    return customers.remove(uuid) != null;
+  }
+
+  @Override
+  public boolean exists(UUID uuid) {
+    return customers.containsKey(uuid);
+  }
+
+  @Override
+  public long count() {
+    return customers.size();
+  }
+}

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

@@ -1,23 +1,22 @@
 package de.schulung.sample.quarkus.domain;
 
 import org.junit.jupiter.api.Test;
-import org.junit.jupiter.api.extension.ExtendWith;
-import org.mockito.InjectMocks;
-import org.mockito.junit.jupiter.MockitoExtension;
 
 import java.time.LocalDate;
 import java.time.Month;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
-@ExtendWith(MockitoExtension.class)
 class CustomersServiceTests {
 
+  // TODO ist das noch sinnvoll so?
+
   // nicht mehr notwendig wegen @FireEvent interceptor
   //@Mock
   //Event<CustomerCreatedEvent> event;
-  @InjectMocks
-  CustomersService service;
+  private final CustomersService service = new CustomersService(
+    new CustomersSinkInMemoryImpl()
+  );
 
   @Test
   void shouldAddUuidToNewCustomer() {