requested changes

Author: J0nasMayr

readme.md

@@ -30,6 +30,9 @@ public AttachmentDataSource attachmentDataSource(JdbcTemplate jdbcTemplate) {
 }
 ```
 
+By default, `JdbcAttachmentDataSource` creates its table on startup. If you prefer to manage the table yourself
+(e.g. via Liquibase), disable the built-in migration using the constructor-flag and create the table in your own migrations.
+
 #### Inline (CID) attachments
 
 To embed an attachment inline, set a `contentId` on the attachment and reference it in the `htmlBody` via the `cid:` scheme.

src/main/java/it/aboutbits/springboot/emailservice/lib/application/JdbcAttachmentDataSource.java

@@ -18,8 +18,14 @@ public class JdbcAttachmentDataSource implements AttachmentDataSource {
     private final JdbcTemplate jdbcTemplate;
 
     public JdbcAttachmentDataSource(JdbcTemplate jdbcTemplate) {
+        this(jdbcTemplate, true);
+    }
+
+    public JdbcAttachmentDataSource(JdbcTemplate jdbcTemplate, boolean runMigrations) {
         this.jdbcTemplate = jdbcTemplate;
-        migrate();
+        if (runMigrations) {
+            migrate();
+        }
     }
 
     private void migrate() {

src/main/java/it/aboutbits/springboot/emailservice/lib/application/UnavailableAttachmentDataSource.java

@@ -4,6 +4,7 @@
 import it.aboutbits.springboot.emailservice.lib.exception.AttachmentException;
 import org.jspecify.annotations.NullMarked;
 
+import java.io.IOException;
 import java.io.InputStream;
 
 @NullMarked
@@ -15,7 +16,11 @@ public InputStream getAttachmentPayload(long fileReference) throws AttachmentExc
 
     @Override
     public long storeAttachmentPayload(InputStream payload) throws AttachmentException {
-        throw new AttachmentException("attachments not available");
+        try (payload) {
+            throw new AttachmentException("attachments not available");
+        } catch (IOException e) {
+            throw new AttachmentException("attachments not available", e);
+        }
     }
 
     @Override