Keep the old public constructor.

3 files changed, 6 insertions, 2 deletions

diff --git a/messagebus/abi-spec.json b/messagebus/abi-spec.json
index 15a24f82f75..093b7f3450a 100644
--- a/messagebus/abi-spec.json
+++ b/messagebus/abi-spec.json
@@ -800,6 +800,7 @@
       "public"
     ],
     "methods" : [
+      "public void <init>(com.yahoo.messagebus.MessageHandler, com.yahoo.messagebus.Messenger)",
       "public void <init>(com.yahoo.messagebus.MessageHandler)",
       "public boolean destroy()",
       "public void handleMessage(com.yahoo.messagebus.Message)",
diff --git a/messagebus/src/main/java/com/yahoo/messagebus/Sequencer.java b/messagebus/src/main/java/com/yahoo/messagebus/Sequencer.java
index 4382f6cb798..671e59dc7c9 100644
--- a/messagebus/src/main/java/com/yahoo/messagebus/Sequencer.java
+++ b/messagebus/src/main/java/com/yahoo/messagebus/Sequencer.java
@@ -33,6 +33,9 @@ public class Sequencer implements MessageHandler, ReplyHandler {
         this.sender = sender;
         this.msn = msn;
     }
+    public Sequencer(MessageHandler sender) {
+        this(sender, null);
+    }
 
     /**
      * Sets the destroyed flag to true. The very first time this method is called, it cleans up all its dependencies.
diff --git a/messagebus/src/test/java/com/yahoo/messagebus/SequencerTestCase.java b/messagebus/src/test/java/com/yahoo/messagebus/SequencerTestCase.java
index d44bb9235f9..10a5265e98f 100644
--- a/messagebus/src/test/java/com/yahoo/messagebus/SequencerTestCase.java
+++ b/messagebus/src/test/java/com/yahoo/messagebus/SequencerTestCase.java
@@ -19,7 +19,7 @@ public class SequencerTestCase {
         TestQueue src = new TestQueue();
         TestQueue dst = new TestQueue();
         QueueSender sender = new QueueSender(dst);
-        Sequencer seq = new Sequencer(sender, null);
+        Sequencer seq = new Sequencer(sender);
 
         seq.handleMessage(src.createMessage(false, 0));
         seq.handleMessage(src.createMessage(false, 0));
@@ -51,7 +51,7 @@ public class SequencerTestCase {
         TestQueue src = new TestQueue();
         TestQueue dst = new TestQueue();
         QueueSender sender = new QueueSender(dst);
-        Sequencer seq = new Sequencer(sender, null);
+        Sequencer seq = new Sequencer(sender);
 
         seq.handleMessage(src.createMessage(true, 1L));
         seq.handleMessage(src.createMessage(true, 2L));