hadoop RpcReply 源码
haddop RpcReply 代码
文件路径：/hadoop-common-project/hadoop-nfs/src/main/java/org/apache/hadoop/oncrpc/RpcReply.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.oncrpc;
import org.apache.hadoop.oncrpc.security.RpcAuthInfo;
import org.apache.hadoop.oncrpc.security.Verifier;
import org.apache.hadoop.util.Preconditions;
/**
* Represents an RPC message of type RPC reply as defined in RFC 1831
*/
public abstract class RpcReply extends RpcMessage {
/** RPC reply_stat as defined in RFC 1831 */
public enum ReplyState {
// the order of the values below are significant.
MSG_ACCEPTED,
MSG_DENIED;
int getValue() {
return ordinal();
}
public static ReplyState fromValue(int value) {
return values()[value];
}
}
protected final ReplyState replyState;
protected final Verifier verifier;
RpcReply(int xid, ReplyState state, Verifier verifier) {
super(xid, RpcMessage.Type.RPC_REPLY);
this.replyState = state;
this.verifier = verifier;
}
public RpcAuthInfo getVerifier() {
return verifier;
}
public static RpcReply read(XDR xdr) {
int xid = xdr.readInt();
final Type messageType = Type.fromValue(xdr.readInt());
Preconditions.checkState(messageType == RpcMessage.Type.RPC_REPLY);
ReplyState stat = ReplyState.fromValue(xdr.readInt());
switch (stat) {
case MSG_ACCEPTED:
return RpcAcceptedReply.read(xid, stat, xdr);
case MSG_DENIED:
return RpcDeniedReply.read(xid, stat, xdr);
}
return null;
}
public ReplyState getState() {
return replyState;
}
}
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