hadoop KeyStoreProvider 源码
haddop KeyStoreProvider 代码
文件路径：/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/alias/KeyStoreProvider.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.security.alias;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.permission.FsPermission;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URI;
/**
* CredentialProvider based on Java Key Store API.
* The file may be stored in any Hadoop FileSystem using the following
* name mangling:
* bcfks://hdfs@nn1.example.com/my/creds.bcfks {@literal ->}
* hdfs://nn1.example.com/my/creds.bcfks bcfks://file/home/larry/creds.bcfks
* {@literal ->} file:///home/user1/creds.bcfks
*/
@InterfaceAudience.Private
public abstract class KeyStoreProvider extends AbstractJavaKeyStoreProvider {
private FileSystem fs;
private FsPermission permissions;
protected KeyStoreProvider(URI uri, Configuration conf)
throws IOException {
super(uri, conf);
}
@Override
protected OutputStream getOutputStreamForKeystore() throws IOException {
FSDataOutputStream out = FileSystem.create(fs, getPath(), permissions);
return out;
}
@Override
protected boolean keystoreExists() throws IOException {
return fs.exists(getPath());
}
@Override
protected InputStream getInputStreamForFile() throws IOException {
return fs.open(getPath());
}
@Override
protected void createPermissions(String perms) {
permissions = new FsPermission(perms);
}
@Override
protected void stashOriginalFilePermissions() throws IOException {
// save off permissions in case we need to
// rewrite the keystore in flush()
FileStatus s = fs.getFileStatus(getPath());
permissions = s.getPermission();
}
protected void initFileSystem(URI uri)
throws IOException {
super.initFileSystem(uri);
fs = getPath().getFileSystem(getConf());
}
}
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