hadoop UserParam 源码
haddop UserParam 代码
文件路径：/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/web/resources/UserParam.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.web.resources;
import static org.apache.hadoop.hdfs.client.HdfsClientConfigKeys.DFS_WEBHDFS_USER_PATTERN_DEFAULT;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.classification.VisibleForTesting;
import java.text.MessageFormat;
import java.util.regex.Pattern;
/** User parameter. */
public class UserParam extends StringParam {
/** Parameter name. */
public static final String NAME = "user.name";
/** Default parameter value. */
public static final String DEFAULT = "";
private static Domain domain = new Domain(NAME,
Pattern.compile(DFS_WEBHDFS_USER_PATTERN_DEFAULT));
@VisibleForTesting
public static Domain getUserPatternDomain() {
return domain;
}
@VisibleForTesting
public static void setUserPatternDomain(Domain dm) {
domain = dm;
}
public static void setUserPattern(String pattern) {
domain = new Domain(NAME, Pattern.compile(pattern));
}
private static String validateLength(String str) {
if (str == null) {
throw new IllegalArgumentException(
MessageFormat.format("Parameter [{0}], cannot be NULL", NAME));
}
int len = str.length();
if (len < 1) {
throw new IllegalArgumentException(MessageFormat.format(
"Parameter [{0}], it's length must be at least 1", NAME));
}
return str;
}
/**
* Constructor.
* @param str a string representation of the parameter value.
*/
public UserParam(final String str) {
super(domain, str == null ||
str.equals(DEFAULT) ? null : validateLength(str));
}
/**
* Construct an object from a UGI.
*/
public UserParam(final UserGroupInformation ugi) {
this(ugi.getShortUserName());
}
@Override
public String getName() {
return NAME;
}
}
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