spark TransportClientBootstrap 源码
spark TransportClientBootstrap 代码
文件路径：/common/network-common/src/main/java/org/apache/spark/network/client/TransportClientBootstrap.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.network.client;
import io.netty.channel.Channel;
/**
* A bootstrap which is executed on a TransportClient before it is returned to the user.
* This enables an initial exchange of information (e.g., SASL authentication tokens) on a once-per-
* connection basis.
*
* Since connections (and TransportClients) are reused as much as possible, it is generally
* reasonable to perform an expensive bootstrapping operation, as they often share a lifespan with
* the JVM itself.
*/
public interface TransportClientBootstrap {
/** Performs the bootstrapping operation, throwing an exception on failure. */
void doBootstrap(TransportClient client, Channel channel) throws RuntimeException;
}
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