HadoopAuthenticator.java

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// 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
//
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package org.apache.doris.common.security.authentication;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.security.UserGroupInformation;

import java.io.IOException;
import java.lang.reflect.UndeclaredThrowableException;
import java.security.PrivilegedExceptionAction;

public interface HadoopAuthenticator {

    UserGroupInformation getUGI() throws IOException;

    default <T> T doAs(PrivilegedExceptionAction<T> action) throws IOException {
        try {
            return getUGI().doAs(action);
        } catch (InterruptedException e) {
            throw new IOException(e);
        } catch (UndeclaredThrowableException e) {
            if (e.getCause() instanceof RuntimeException) {
                throw (RuntimeException) e.getCause();
            } else {
                throw new RuntimeException(e.getCause());
            }
        }
    }

    static HadoopAuthenticator getHadoopAuthenticator(AuthenticationConfig config) {
        if (config instanceof KerberosAuthenticationConfig) {
            return new HadoopKerberosAuthenticator((KerberosAuthenticationConfig) config);
        } else {
            return new HadoopSimpleAuthenticator((SimpleAuthenticationConfig) config);
        }
    }

    static HadoopAuthenticator getHadoopAuthenticator(Configuration configuration) {
        AuthenticationConfig authConfig = AuthenticationConfig.getKerberosConfig(configuration);
        return getHadoopAuthenticator(authConfig);
    }
}