spring-batch GemfireItemWriterBuilder 源码
spring-batch GemfireItemWriterBuilder 代码
文件路径：/spring-batch-infrastructure/src/main/java/org/springframework/batch/item/data/builder/GemfireItemWriterBuilder.java
/*
* Copyright 2017 the original author or authors.
*
* Licensed 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
*
* https://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.springframework.batch.item.data.builder;
import org.springframework.batch.item.data.GemfireItemWriter;
import org.springframework.core.convert.converter.Converter;
import org.springframework.data.gemfire.GemfireTemplate;
import org.springframework.util.Assert;
/**
* A builder implementation for the {@link GemfireItemWriter}
*
* @author Glenn Renfro
* @since 4.0
* @see GemfireItemWriterBuilder
*/
public class GemfireItemWriterBuilder<K, V> {
private GemfireTemplate template;
private Converter<V, K> itemKeyMapper;
private boolean delete;
/**
* Establishes the GemfireTemplate the writer should use.
* @param template the {@link GemfireTemplate} to set.
* @return The current instance of the builder.
* @see GemfireItemWriter#setTemplate(GemfireTemplate)
*/
public GemfireItemWriterBuilder<K, V> template(GemfireTemplate template) {
this.template = template;
return this;
}
/**
* Set the {@link Converter} to use to derive the key from the item.
* @param itemKeyMapper the Converter to use.
* @return The current instance of the builder.
* @see GemfireItemWriter#setItemKeyMapper(Converter)
*/
public GemfireItemWriterBuilder<K, V> itemKeyMapper(Converter<V, K> itemKeyMapper) {
this.itemKeyMapper = itemKeyMapper;
return this;
}
/**
* Indicates if the items being passed to the writer are to be saved or removed from
* the data store. If set to false (default), the items will be saved. If set to true,
* the items will be removed.
* @param delete removal indicator.
* @return The current instance of the builder.
* @see GemfireItemWriter#setDelete(boolean)
*/
public GemfireItemWriterBuilder<K, V> delete(boolean delete) {
this.delete = delete;
return this;
}
/**
* Validates and builds a {@link GemfireItemWriter}.
* @return a {@link GemfireItemWriter}
*/
public GemfireItemWriter<K, V> build() {
Assert.notNull(this.template, "template is required.");
Assert.notNull(this.itemKeyMapper, "itemKeyMapper is required.");
GemfireItemWriter<K, V> writer = new GemfireItemWriter<>();
writer.setTemplate(this.template);
writer.setItemKeyMapper(this.itemKeyMapper);
writer.setDelete(this.delete);
return writer;
}
}
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