| /** |
| * 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.distributedlog; |
| |
| import org.apache.distributedlog.io.AsyncAbortable; |
| import org.apache.distributedlog.io.AsyncCloseable; |
| import com.twitter.util.Future; |
| |
| import java.io.Closeable; |
| import java.util.List; |
| |
| public interface AsyncLogWriter extends AsyncCloseable, AsyncAbortable { |
| |
| /** |
| * Get the last committed transaction id. |
| * |
| * @return last committed transaction id. |
| */ |
| public long getLastTxId(); |
| |
| /** |
| * Write a log record to the stream. |
| * |
| * @param record single log record |
| * @return A Future which contains a DLSN if the record was successfully written |
| * or an exception if the write fails |
| */ |
| public Future<DLSN> write(LogRecord record); |
| |
| /** |
| * Write log records to the stream in bulk. Each future in the list represents the result of |
| * one write operation. The size of the result list is equal to the size of the input list. |
| * Buffers are written in order, and the list of result futures has the same order. |
| * |
| * @param record set of log records |
| * @return A Future which contains a list of Future DLSNs if the record was successfully written |
| * or an exception if the operation fails. |
| */ |
| public Future<List<Future<DLSN>>> writeBulk(List<LogRecord> record); |
| |
| /** |
| * Truncate the log until <i>dlsn</i>. |
| * |
| * @param dlsn |
| * dlsn to truncate until. |
| * @return A Future indicates whether the operation succeeds or not, or an exception |
| * if the truncation fails. |
| */ |
| public Future<Boolean> truncate(DLSN dlsn); |
| |
| /** |
| * Get the name of the stream this writer writes data to |
| */ |
| public String getStreamName(); |
| } |