com.cloudera.hoop.AuthFilter.java Source code

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Here is the source code for com.cloudera.hoop.AuthFilter.java

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/*
 * Copyright (c) 2011, Cloudera, Inc. All Rights Reserved.
 *
 * Cloudera, Inc. 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
 *
 * This software 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 com.cloudera.hoop;

import com.cloudera.alfredo.server.AuthenticationFilter;
import org.apache.hadoop.conf.Configuration;

import javax.servlet.FilterConfig;
import java.util.Map;
import java.util.Properties;

/**
 * Subclass of Alfredo's <code>AuthenticationFilter</code> that obtains its configuration
 * from Hoop's server configuration.
 */
public class AuthFilter extends AuthenticationFilter {
    private static final String CONF_PREFIX = "hoop.authentication.";

    /**
     * Returns the Alfredo configuration from Hoop's configuration.
     * <p/>
     * It returns all Hoop's configuration properties prefixed with
     * <code>hoop.authentication</code>. The <code>hoop.authentication</code>
     * prefix is removed from the returned property names.
     *
     * @param configPrefix parameter not used.
     * @param filterConfig parameter not used.
     * @return Alfredo configuration read from Hoop's configuration.
     */
    @Override
    protected Properties getConfiguration(String configPrefix, FilterConfig filterConfig) {
        Properties props = new Properties();
        Configuration conf = HoopServer.get().getConfig();

        props.setProperty(AuthenticationFilter.COOKIE_PATH, "/");
        for (Map.Entry<String, String> entry : conf) {
            String name = entry.getKey();
            if (name.startsWith(CONF_PREFIX)) {
                String value = conf.get(name);
                name = name.substring(CONF_PREFIX.length());
                props.setProperty(name, value);
            }
        }
        return props;
    }

}