--- /dev/null
+package org.apache.lucene.search;
+
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import java.io.IOException;
+
+import org.apache.lucene.search.NRTManager; // javadocs
+import org.apache.lucene.search.IndexSearcher; // javadocs
+
+/** Pass an implementation of this to {@link NRTManager} or
+ * {@link SearcherManager} to warm a new {@link
+ * IndexSearcher} before it's put into production.
+ *
+ * @lucene.experimental */
+
+public interface SearcherWarmer {
+ // TODO: can we somehow merge this w/ IW's
+ // IndexReaderWarmer.... should IW switch to this?
+ public void warm(IndexSearcher s) throws IOException;
+}