spring-data-elasticsearch ChildTemplate 源码
spring-data-elasticsearch ChildTemplate 代码
文件路径：/src/main/java/org/springframework/data/elasticsearch/client/elc/ChildTemplate.java
/*
* Copyright 2021-2022 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.data.elasticsearch.client.elc;
import co.elastic.clients.ApiClient;
import co.elastic.clients.elasticsearch.cluster.ElasticsearchClusterClient;
import co.elastic.clients.json.JsonpMapper;
import co.elastic.clients.transport.Transport;
import java.io.IOException;
import org.springframework.data.elasticsearch.core.convert.ElasticsearchConverter;
import org.springframework.util.Assert;
/**
* base class for a template that uses one of the {@link co.elastic.clients.elasticsearch.ElasticsearchClient}'s child
* clients like {@link ElasticsearchClusterClient} or
* {@link co.elastic.clients.elasticsearch.indices.ElasticsearchIndicesClient}.
*
* @author Peter-Josef Meisch
* @since 4.4
*/
public abstract class ChildTemplate<T extends Transport, CLIENT extends ApiClient<T, CLIENT>> {
protected final CLIENT client;
protected final RequestConverter requestConverter;
protected final ResponseConverter responseConverter;
protected final ElasticsearchExceptionTranslator exceptionTranslator;
public ChildTemplate(CLIENT client, ElasticsearchConverter elasticsearchConverter) {
this.client = client;
JsonpMapper jsonpMapper = client._transport().jsonpMapper();
requestConverter = new RequestConverter(elasticsearchConverter, jsonpMapper);
responseConverter = new ResponseConverter(jsonpMapper);
exceptionTranslator = new ElasticsearchExceptionTranslator(jsonpMapper);
}
/**
* Callback interface to be used with {@link #execute(ClientCallback)} for operating directly on the client.
*/
@FunctionalInterface
public interface ClientCallback<CLIENT, RESULT> {
RESULT doWithClient(CLIENT client) throws IOException;
}
/**
* Execute a callback with the client and provide exception translation.
*
* @param callback the callback to execute, must not be {@literal null}
* @param <RESULT> the type returned from the callback
* @return the callback result
*/
public <RESULT> RESULT execute(ClientCallback<CLIENT, RESULT> callback) {
Assert.notNull(callback, "callback must not be null");
try {
return callback.doWithClient(client);
} catch (IOException | RuntimeException e) {
throw exceptionTranslator.translateException(e);
}
}
}
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