spark-reviews mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From cloud-fan <...@git.apache.org>
Subject [GitHub] spark pull request #19925: [SPARK-22732] Add Structured Streaming APIs to Da...
Date Thu, 14 Dec 2017 07:33:30 GMT
Github user cloud-fan commented on a diff in the pull request:

    https://github.com/apache/spark/pull/19925#discussion_r156870726
  
    --- Diff: sql/core/src/main/java/org/apache/spark/sql/sources/v2/MicroBatchWriteSupport.java
---
    @@ -0,0 +1,58 @@
    +/*
    + * 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.spark.sql.sources.v2;
    +
    +import java.util.Optional;
    +
    +import org.apache.spark.annotation.InterfaceStability;
    +import org.apache.spark.sql.execution.streaming.BaseStreamingSink;
    +import org.apache.spark.sql.sources.v2.writer.DataSourceV2Writer;
    +import org.apache.spark.sql.streaming.OutputMode;
    +import org.apache.spark.sql.types.StructType;
    +
    +/**
    + * A mix-in interface for {@link DataSourceV2}. Data sources can implement this interface
to
    + * provide data writing ability and save the data from a microbatch to the data source.
    + */
    +@InterfaceStability.Evolving
    +public interface MicroBatchWriteSupport extends BaseStreamingSink {
    +
    +  /**
    +   * Creates an optional {@link DataSourceV2Writer} to save the data to this data source.
Data
    +   * sources can return None if there is no writing needed to be done.
    +   *
    +   * @param queryId A unique string for the writing query. It's possible that there are
many writing
    +   *                queries running at the same time, and the returned {@link DataSourceV2Writer}
    +   *                can use this id to distinguish itself from others.
    +   * @param epochId The uniquenumeric ID of the batch within this writing query. This
is an
    --- End diff --
    
    typo: `unique numberic`


---

---------------------------------------------------------------------
To unsubscribe, e-mail: reviews-unsubscribe@spark.apache.org
For additional commands, e-mail: reviews-help@spark.apache.org


Mime
View raw message