hadoop NamenodeProtocolPB 源码
haddop NamenodeProtocolPB 代码
文件路径：/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocolPB/NamenodeProtocolPB.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.hadoop.hdfs.protocolPB;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.hdfs.DFSConfigKeys;
import org.apache.hadoop.hdfs.protocol.proto.NamenodeProtocolProtos.NamenodeProtocolService;
import org.apache.hadoop.ipc.ProtocolInfo;
import org.apache.hadoop.security.KerberosInfo;
/**
* Protocol that a secondary NameNode uses to communicate with the NameNode.
* It's used to get part of the name node state
*
* Note: This extends the protocolbuffer service based interface to
* add annotations required for security.
*/
@KerberosInfo(
serverPrincipal = DFSConfigKeys.DFS_NAMENODE_KERBEROS_PRINCIPAL_KEY,
clientPrincipal = DFSConfigKeys.DFS_NAMENODE_KERBEROS_PRINCIPAL_KEY)
@ProtocolInfo(protocolName =
"org.apache.hadoop.hdfs.server.protocol.NamenodeProtocol",
protocolVersion = 1)
@InterfaceAudience.Private
public interface NamenodeProtocolPB extends
NamenodeProtocolService.BlockingInterface {
}
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