X-Git-Url: https://git.nmode.ca/signal-cli/blobdiff_plain/32818a8608f5bddc46ad5c7dc442f509c939791c..9c67aabebb1d6114eddebe19e36f73fb76691c05:/src/main/java/org/asamk/signal/ReceiveMessageHandler.java

diff --git a/src/main/java/org/asamk/signal/ReceiveMessageHandler.java b/src/main/java/org/asamk/signal/ReceiveMessageHandler.java
index 26e12809..4e44497f 100644
--- a/src/main/java/org/asamk/signal/ReceiveMessageHandler.java
+++ b/src/main/java/org/asamk/signal/ReceiveMessageHandler.java
@@ -25,6 +25,12 @@ public class ReceiveMessageHandler implements Manager.ReceiveMessageHandler {
 
     @Override
     public void handleMessage(MessageEnvelope envelope, Throwable exception) {
+        synchronized (writer) {
+            handleMessageInternal(envelope, exception);
+        }
+    }
+
+    private void handleMessageInternal(MessageEnvelope envelope, Throwable exception) {
         var source = envelope.sourceAddress();
         writer.println("Envelope from: {} (device: {})",
                 source.map(this::formatContact).orElse("unknown source"),