Add a leader state and failover operation.

cojen · Sep 27, 2024 · f4bd83f · f4bd83f
1 parent 021e7f3
commit f4bd83f
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diff --git a/src/main/java/org/cojen/tupl/jmx/DatabaseMBean.java b/src/main/java/org/cojen/tupl/jmx/DatabaseMBean.java
@@ -43,6 +43,8 @@ public interface DatabaseMBean {
 
     long getReplicationBacklog();
 
+    boolean isLeader();
+
     void flush();
 
     void sync();
@@ -52,4 +54,6 @@ public interface DatabaseMBean {
     void compactFile(double target);
 
     void verify();
+
+    boolean failover();
 }
diff --git a/src/main/java/org/cojen/tupl/jmx/Registration.java b/src/main/java/org/cojen/tupl/jmx/Registration.java
@@ -291,6 +291,12 @@ public long getReplicationBacklog() {
             return stats == null ? 0 : stats.replicationBacklog;
         }
 
+        @Override
+        public boolean isLeader() {
+            Database db = db();
+            return db == null ? false : db.isLeader();
+        }
+
         @Override
         public void flush() {
             asyncOp(db -> {
@@ -377,6 +383,16 @@ public boolean indexNodeFailed(long id, int level, String message) {
             }
         }
 
+        @Override
+        public boolean failover() {
+            try {
+                Database db = db();
+                return db == null ? false : db.failover();
+            } catch (IOException e) {
+                return false;
+            }
+        }
+
         private DatabaseStats stats() {
             synchronized (this) {
                 DatabaseStats stats = mStats;