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diff --git a/vespalog/src/main/java/com/yahoo/log/LevelControllerRepo.java b/vespalog/src/main/java/com/yahoo/log/LevelControllerRepo.java
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+++ b/vespalog/src/main/java/com/yahoo/log/LevelControllerRepo.java
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+// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.log;
+
+/**
+ * The level controller repository is an interface towards something that is able to provide level
+ * controllers for a given component.
+ *
+ * @author lulf
+ * @since 5.1
+ */
+public interface LevelControllerRepo {
+    /**
+     * Return the level controller for a given component.
+     * @param component The component name string.
+     * @return The LevelController corresponding to that component. Return null if not found.
+     */
+    public LevelController getLevelController(String component);
+
+    /**
+     * Close down the level controller repository. Cleanup should be done here.
+     */
+    public void close();
+}