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https://issues.apache.org/jira/browse/RATIS-272?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16584625#comment-16584625
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ASF GitHub Bot commented on RATIS-272:
--------------------------------------
Github user ankitsinghal commented on a diff in the pull request:
https://github.com/apache/incubator-ratis/pull/4#discussion_r211064553
--- Diff:
ratis-logservice/src/main/java/org/apache/ratis/logservice/api/AsyncLogReader.java
---
@@ -0,0 +1,54 @@
+/**
+ * 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.ratis.logservice.api;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.List;
+import java.util.concurrent.CompletableFuture;
+
+/**
+ * Asynchronous client interface to read from a LogStream.
+ */
+public interface AsyncLogReader extends AutoCloseable {
+
+ /**
+ * Seeks to the position before the record at the provided {@code
recordId} in the LogStream.
+ *
+ * @param recordId A non-negative, recordId in the LogStream
+ * @return A future for when the operation is completed.
+ */
+ CompletableFuture<Void> seek(long recordId) throws IOException;
+
--- End diff --
Can add reset() also to reset according to the logStream getFirstRecordId().
> Design ideal API
> ----------------
>
> Key: RATIS-272
> URL: https://issues.apache.org/jira/browse/RATIS-272
> Project: Ratis
> Issue Type: Sub-task
> Components: LogService
> Reporter: Josh Elser
> Priority: Major
>
> With influence from Apache DistributedLog, Kafka, and BookKeeper, design an
> API that balances the ideal notion of what a distribute log system should
> look like, but also considers the needs of HBase to replace a WAL.
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