Use standard generated hibernate time stamps

service/fling/src/main/java/net/friedl/fling/model/dto/ArtifactDto.java

@@ -26,10 +26,9 @@ public class ArtifactDto {
   @NotNull
   private Path path;
 
-  @Schema(type = "integer", format = "int64",
+  @Schema(type = "integer", format = "int64", accessMode = AccessMode.READ_ONLY,
-      description = "Upload time in milliseconds since the unix epoch 01.01.1970 00:00:00 UTC")
+      description = "Creation time in milliseconds since the unix epoch 01.01.1970 00:00:00 UTC")
-  @Builder.Default
+  private Instant creationTime;
-  private Instant uploadTime = Instant.now();
 
   @Schema(accessMode = AccessMode.READ_ONLY, type = "boolean",
       description = "Whether the artifact was successfully persisted in the archive.")

service/fling/src/main/java/net/friedl/fling/model/dto/FlingDto.java

@@ -24,11 +24,10 @@ public class FlingDto {
   @NotNull
   private String name;
 
-  @Schema(type = "integer", format = "int64",
+  @Schema(type = "integer", format = "int64", accessMode = AccessMode.READ_ONLY,
       description = "Creation time in milliseconds since the unix epoch 01.01.1970 00:00:00 UTC")
   @NotNull
-  @Builder.Default
+  private Instant creationTime;
-  private Instant creationTime = Instant.now();
 
   @Schema(description = "Share id of the fling. Used in the share link.")
   private String shareId;

service/fling/src/main/java/net/friedl/fling/persistence/entities/ArtifactEntity.java

@@ -9,6 +9,9 @@ import javax.persistence.GeneratedValue;
 import javax.persistence.Id;
 import javax.persistence.ManyToOne;
 import javax.persistence.Table;
+import javax.persistence.Version;
+import org.hibernate.annotations.CreationTimestamp;
+import org.hibernate.annotations.UpdateTimestamp;
 import lombok.Getter;
 import lombok.Setter;
 
@@ -24,9 +27,6 @@ public class ArtifactEntity {
   @Column(nullable = false)
   private Path path;
 
-  @Column(nullable = false)
-  private Instant uploadTime = Instant.now();
-
   @Column(unique = true, nullable = true)
   private String archiveId;
 
@@ -35,4 +35,13 @@ public class ArtifactEntity {
 
   @ManyToOne(optional = false)
   private FlingEntity fling;
+
+  @CreationTimestamp
+  private Instant creationTime;
+
+  @UpdateTimestamp
+  private Instant updateTime;
+
+  @Version
+  private Long version;
 }

service/fling/src/main/java/net/friedl/fling/persistence/entities/FlingEntity.java

@@ -1,6 +1,7 @@
 package net.friedl.fling.persistence.entities;
 
 import java.time.Instant;
+import java.util.Date;
 import java.util.Set;
 import java.util.UUID;
 import javax.persistence.CascadeType;
@@ -10,6 +11,9 @@ import javax.persistence.GeneratedValue;
 import javax.persistence.Id;
 import javax.persistence.OneToMany;
 import javax.persistence.Table;
+import javax.persistence.Version;
+import org.hibernate.annotations.CreationTimestamp;
+import org.hibernate.annotations.UpdateTimestamp;
 import lombok.Getter;
 import lombok.Setter;
 
@@ -24,8 +28,6 @@ public class FlingEntity {
 
   private String name;
 
-  private Instant creationTime = Instant.now();
-
   private Instant expirationTime;
 
   private Integer expirationClicks;
@@ -46,4 +48,13 @@ public class FlingEntity {
 
   @OneToMany(mappedBy = "fling", cascade = CascadeType.ALL, orphanRemoval = true)
   private Set<ArtifactEntity> artifacts;
+
+  @CreationTimestamp
+  private Date creationTime;
+
+  @UpdateTimestamp
+  private Date updateTime;
+
+  @Version
+  private Long version;
 }

service/fling/src/test/java/net/friedl/fling/service/ArtifactServiceTest.java

@@ -7,8 +7,6 @@ import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 import java.io.IOException;
 import java.nio.file.Path;
-import java.time.Instant;
-import java.time.temporal.ChronoUnit;
 import java.util.UUID;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
@@ -71,18 +69,15 @@ public class ArtifactServiceTest {
   public void beforeEach() {
     this.artifactEntity1 = new ArtifactEntity();
     artifactEntity1.setId(UUID.randomUUID());
-    artifactEntity1.setUploadTime(Instant.EPOCH);
     artifactEntity1.setPath(Path.of("artifact1"));
 
     this.artifactEntity2 = new ArtifactEntity();
     artifactEntity2.setId(UUID.randomUUID());
-    artifactEntity2.setUploadTime(Instant.EPOCH.plus(12000, ChronoUnit.DAYS));
     artifactEntity2.setPath(Path.of("/", "/sub", "artifact2"));
 
     this.flingEntity = new FlingEntity();
     flingEntity.setId(UUID.randomUUID());
     flingEntity.setName("fling");
-    flingEntity.setCreationTime(Instant.now());
 
     when(flingRepository.save(any())).then(new Answer<FlingEntity>() {
       @Override
@@ -111,19 +106,16 @@ public class ArtifactServiceTest {
     ArtifactDto artifactDto = artifactService.getById(artifactEntity1.getId());
     assertThat(artifactDto.getId(), equalTo(artifactEntity1.getId()));
     assertThat(artifactDto.getPath(), equalTo(artifactEntity1.getPath()));
-    assertThat(artifactDto.getUploadTime(), equalTo(artifactEntity1.getUploadTime()));
   }
 
   @Test
   public void create_createsArtifact_ok() {
     ArtifactDto artifactToCreate = ArtifactDto.builder()
-        .uploadTime(Instant.now())
         .path(Path.of("new", "artifacts"))
         .build();
 
     ArtifactDto createdArtifact = artifactService.create(flingEntity.getId(), artifactToCreate);
 
-    assertThat(createdArtifact.getUploadTime(), equalTo(artifactToCreate.getUploadTime()));
     assertThat(createdArtifact.getPath(), equalTo(artifactToCreate.getPath()));
   }
 

service/fling/src/test/java/net/friedl/fling/service/FlingServiceTest.java

@@ -13,7 +13,6 @@ import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 import java.io.IOException;
-import java.time.Instant;
 import java.util.List;
 import java.util.Set;
 import java.util.UUID;
@@ -88,13 +87,11 @@ public class FlingServiceTest {
     flingEntity1.setId(UUID.randomUUID());
     flingEntity1.setName("fling1");
     flingEntity1.setAuthCode("testhash");
-    flingEntity1.setCreationTime(Instant.now());
 
     this.flingEntity2 = new FlingEntity();
     flingEntity2.setId(UUID.randomUUID());
     flingEntity2.setName("fling2");
     flingEntity2.setShareId("shareId2");
-    flingEntity2.setCreationTime(Instant.now());
 
     when(flingRepository.save(any())).then(new Answer<FlingEntity>() {
       @Override

service/fling/src/test/java/net/friedl/fling/service/archive/FileSystemArchiveTest.java

@@ -18,8 +18,6 @@ import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.SimpleFileVisitor;
 import java.nio.file.attribute.BasicFileAttributes;
-import java.time.Instant;
-import java.time.temporal.ChronoUnit;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Set;
@@ -273,14 +271,12 @@ public class FileSystemArchiveTest {
     // Fling1/Artifact1
     this.artifactEntity1 = new ArtifactEntity();
     artifactEntity1.setId(UUID.randomUUID());
-    artifactEntity1.setUploadTime(Instant.EPOCH);
     artifactEntity1.setPath(Path.of("artifact1"));
     artifactEntity1.setArchived(true);
 
     this.flingEntity1 = new FlingEntity();
     flingEntity1.setId(new UUID(0, 0));
     flingEntity1.setName("fling1");
-    flingEntity1.setCreationTime(Instant.now());
 
     artifactEntity1.setFling(flingEntity1);
 
@@ -288,14 +284,12 @@ public class FileSystemArchiveTest {
     // Fling2/Artifact2
     this.artifactEntity2 = new ArtifactEntity();
     artifactEntity2.setId(UUID.randomUUID());
-    artifactEntity2.setUploadTime(Instant.EPOCH.plus(12000, ChronoUnit.DAYS));
     artifactEntity2.setPath(Path.of("/", "/sub", "artifact2"));
     artifactEntity2.setArchived(false);
 
     this.flingEntity2 = new FlingEntity();
     flingEntity2.setId(new UUID(1, 0));
     flingEntity2.setName("fling2");
-    flingEntity2.setCreationTime(Instant.EPOCH);
 
     artifactEntity2.setFling(flingEntity2);
   }