1 files changed, 18 insertions, 0 deletions
diff --git a/container-search/src/main/java/com/yahoo/search/dispatch/searchcluster/GroupList.java b/container-search/src/main/java/com/yahoo/search/dispatch/searchcluster/GroupList.java
new file mode 100644
index 00000000000..7d625f55cb6
--- /dev/null
+++ b/container-search/src/main/java/com/yahoo/search/dispatch/searchcluster/GroupList.java
@@ -0,0 +1,18 @@
+package com.yahoo.search.dispatch.searchcluster;
+
+import java.util.Collection;
+import java.util.Set;
+
+/**
+ * Simple interface for groups and their nodes in the content cluster
+ * @author baldersheim
+ */
+public interface GroupList {
+    Group group(int id);
+    Set<Integer> groupKeys();
+    Collection<Group> groups();
+    default boolean isEmpty() {
+        return numGroups() == 0;
+    }
+    int numGroups();
+}