spark SparkPlugin 源码
spark SparkPlugin 代码
文件路径：/core/src/main/java/org/apache/spark/api/plugin/SparkPlugin.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.api.plugin;
import org.apache.spark.annotation.DeveloperApi;
/**
* :: DeveloperApi ::
* A plugin that can be dynamically loaded into a Spark application.
* <p>
* Plugins can be loaded by adding the plugin's class name to the appropriate Spark configuration.
* Check the Spark monitoring guide for details.
* <p>
* Plugins have two optional components: a driver-side component, of which a single instance is
* created per application, inside the Spark driver. And an executor-side component, of which one
* instance is created in each executor that is started by Spark. Details of each component can be
* found in the documentation for {@link DriverPlugin} and {@link ExecutorPlugin}.
*
* @since 3.0.0
*/
@DeveloperApi
public interface SparkPlugin {
/**
* Return the plugin's driver-side component.
*
* @return The driver-side component, or null if one is not needed.
*/
DriverPlugin driverPlugin();
/**
* Return the plugin's executor-side component.
*
* @return The executor-side component, or null if one is not needed.
*/
ExecutorPlugin executorPlugin();
}
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