spark WriteBuilder 源码
spark WriteBuilder 代码
文件路径：/sql/catalyst/src/main/java/org/apache/spark/sql/connector/write/WriteBuilder.java
/*
* 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.connector.write;
import org.apache.spark.annotation.Evolving;
import org.apache.spark.sql.connector.write.streaming.StreamingWrite;
/**
* An interface for building the {@link Write}. Implementations can mix in some interfaces to
* support different ways to write data to data sources.
* <p>
* Unless modified by a mixin interface, the {@link Write} configured by this builder is to
* append data without affecting existing data.
*
* @since 3.0.0
*/
@Evolving
public interface WriteBuilder {
/**
* Returns a logical {@link Write} shared between batch and streaming.
*
* @since 3.2.0
*/
default Write build() {
return new Write() {
@Override
public BatchWrite toBatch() {
return buildForBatch();
}
@Override
public StreamingWrite toStreaming() {
return buildForStreaming();
}
};
}
/**
* Returns a {@link BatchWrite} to write data to batch source.
*
* @deprecated use {@link #build()} instead.
*/
@Deprecated
default BatchWrite buildForBatch() {
throw new UnsupportedOperationException(getClass().getName() +
" does not support batch write");
}
/**
* Returns a {@link StreamingWrite} to write data to streaming source.
*
* @deprecated use {@link #build()} instead.
*/
@Deprecated
default StreamingWrite buildForStreaming() {
throw new UnsupportedOperationException(getClass().getName() +
" does not support streaming write");
}
}
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