CompletableFeatureを使用して処理するように

data/src/main/java/one/nem/lacerta/data/impl/DocumentImpl.java

@@ -3,6 +3,7 @@ package one.nem.lacerta.data.impl;
 import java.util.ArrayList;
 import java.util.Date;
 import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
 
 // Hilt
 import javax.inject.Inject;
@@ -49,13 +50,11 @@ public class DocumentImpl implements Document {
 
 
     @Override
-    public DocumentDetail createDocument(DocumentMeta meta) {
+    public CompletableFuture<DocumentDetail> createDocument(DocumentMeta meta) {
+        return CompletableFuture.supplyAsync(() -> {
             DocumentDetail detail = new DocumentDetail();
             detail.setMeta(meta);
             detail.setPages(new ArrayList<>());
-
-        // TODO-rca: UIスレッドから追い出す
-
             // Create DocumentEntity
             DocumentEntity documentEntity = new DocumentEntity();
             documentEntity.id = meta.getId();
@@ -74,6 +73,7 @@ public class DocumentImpl implements Document {
             vcs.createDocument(meta.getId());
 
             return detail;
+        });
     }
 
     @Override
@@ -102,6 +102,6 @@ public class DocumentImpl implements Document {
 
     @Override
     public DocumentDetail getDocument(String documentId) {
-        return null;
+
     }
 }