Related to FS#131, FS#129, FS#220:filetransfer

- FileTransferFailureReason including types introduced. A failure can be recoverable, non-recoverable or limited recoverable
- in case file transfer with the highest weight factor fails, the next file transfer method is used
- improved logging
- javadoc comments added

1 files changed, 8 insertions, 3 deletions

diff --git a/src/main/java/de/thedevstack/conversationsplus/services/FileTransferService.java b/src/main/java/de/thedevstack/conversationsplus/services/FileTransferService.java
index d6ce4769..9fc35b2b 100644
--- a/src/main/java/de/thedevstack/conversationsplus/services/FileTransferService.java
+++ b/src/main/java/de/thedevstack/conversationsplus/services/FileTransferService.java
@@ -1,11 +1,10 @@
 package de.thedevstack.conversationsplus.services;
 
-import de.thedevstack.conversationsplus.entities.Account;
 import de.thedevstack.conversationsplus.entities.Message;
-import de.thedevstack.conversationsplus.entities.Transferable;
+import de.thedevstack.conversationsplus.services.filetransfer.FileTransferStatusListener;
 
 /**
- *
+ * An implementation of this class transfers a file to another entity or server.
  */
 public interface FileTransferService {
     /**
@@ -28,4 +27,10 @@ public interface FileTransferService {
      * @return <code>true</code> if the message can be processed, <code>false</code> otherwise
      */
     boolean accept(Message message);
+
+    /**
+     * Adds one or more file transfer status listeners.
+     * @param listeners the listeners to add
+     */
+    void addFileTransferStatusListener(FileTransferStatusListener... listeners);
 }