@@ -0,0 +1,1350 @@
+/*%0A * Licensed to the University of California, Berkeley under one or more contributor license%0A * agreements. See the NOTICE file distributed with this work for additional information regarding%0A * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the%0A * %22License%22); you may not use this file except in compliance with the License. You may obtain a%0A * copy of the License at%0A *%0A * http://www.apache.org/licenses/LICENSE-2.0%0A *%0A * Unless required by applicable law or agreed to in writing, software distributed under the License%0A * is distributed on an %22AS IS%22 BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express%0A * or implied. See the License for the specific language governing permissions and limitations under%0A * the License.%0A */%0A%0Apackage tachyon.worker;%0A%0Aimport java.io.IOException;%0A%0A/**%0A * Interface of a Tachyon worker.%0A */%0Apublic interface Worker %7B%0A%0A  /**%0A   * Starts the worker. Here, the worker should initialize state and possibly start threads required%0A   * for operation.%0A   *%0A   * @throws IOException if I/O error occurs%0A   */%0A  void start() throws IOException;%0A%0A  /**%0A   * Stops the worker. Here, anything created or started in %7B@link #start()%7D should be cleaned up%0A   * and shutdown.%0A   *%0A   * @throws IOException if I/O error occurs%0A   */%0A  void stop() throws IOException;%0A%7D%0A

Add Worker interface