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HADOOP-7875. Add helper class to unwrap protobuf ServiceException. Contributed by Suresh Srinivas.

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git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1210319 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Suresh Srinivas 2011-12-05 03:33:15 +00:00
parent 65200998c0
commit 560c8946ea
2 changed files with 51 additions and 3 deletions
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8
hadoop-common-project/hadoop-common/CHANGES.txt
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@ -5,6 +5,11 @@ Trunk (unreleased changes)
INCOMPATIBLE CHANGES INCOMPATIBLE CHANGES
NEW FEATURES NEW FEATURES
HADOOP-7773. Add support for protocol buffer based RPC engine.
(suresh)
HADOOP-7875. Add helper class to unwrap protobuf ServiceException.
(suresh)
IMPROVEMENTS IMPROVEMENTS
@ -111,9 +116,6 @@ Trunk (unreleased changes)
HADOOP-7761. Improve the performance of raw comparisons. (todd) HADOOP-7761. Improve the performance of raw comparisons. (todd)
HADOOP-7773. Add support for protocol buffer based RPC engine.
(suresh)
Release 0.23.1 - Unreleased Release 0.23.1 - Unreleased
INCOMPATIBLE CHANGES INCOMPATIBLE CHANGES

46
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/ProtobufHelper.java Normal file
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@ -0,0 +1,46 @@
/**
* 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.ipc;
import java.io.IOException;
import org.apache.hadoop.classification.InterfaceAudience;
import com.google.protobuf.ServiceException;
/**
* Helper methods for protobuf related RPC implementation
*/
@InterfaceAudience.Private
public class ProtobufHelper {
private ProtobufHelper() {
// Hidden constructor for class with only static helper methods
}
/**
* Return the RemoteException wrapped in ServiceException as cause.
* @param se ServiceException that wraps RemoteException
* @return RemoteException wrapped in ServiceException or
* a new IOException that wraps unexpected ServiceException.
*/
public static IOException getRemoteException(ServiceException se) {
Throwable e = se.getCause();
return ((e instanceof RemoteException) ? (IOException) e :
new IOException(se));
}
}