| /** |
| * 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. |
| */ |
| |
| package org.apache.hadoop.fs; |
| |
| import java.io.IOException; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| |
| /** This interface for flush/sync operation. */ |
| @InterfaceAudience.Public |
| @InterfaceStability.Evolving |
| public interface Syncable { |
| /** |
| * @deprecated As of HADOOP 0.21.0, replaced by hflush |
| * @see #hflush() |
| */ |
| @Deprecated public void sync() throws IOException; |
| |
| /** Flush out the data in client's user buffer. After the return of |
| * this call, new readers will see the data. |
| * @throws IOException if any error occurs |
| */ |
| public void hflush() throws IOException; |
| |
| /** Similar to posix fsync, flush out the data in client's user buffer |
| * all the way to the disk device (but the disk may have it in its cache). |
| * @throws IOException if error occurs |
| */ |
| public void hsync() throws IOException; |
| } |