org.apache.sentry.provider.file.PolicyFiles.java Source code

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Here is the source code for org.apache.sentry.provider.file.PolicyFiles.java

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/*
 * 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.sentry.provider.file;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.shiro.config.Ini;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.common.io.ByteStreams;
import com.google.common.io.Resources;

public class PolicyFiles {

    private static final Logger LOGGER = LoggerFactory.getLogger(PolicyFiles.class);

    public static void copyToDir(File dest, String... resources) throws FileNotFoundException, IOException {
        for (String resource : resources) {
            LOGGER.info("Copying " + resource + " to " + dest);
            Resources.copy(Resources.getResource(resource), new FileOutputStream(new File(dest, resource)));
        }
    }

    public static void copyToDir(FileSystem fs, Path dest, String... resources)
            throws FileNotFoundException, IOException {
        for (String resource : resources) {
            InputStream in = Resources.getResource(resource).openStream();
            FSDataOutputStream out = fs.create(new Path(dest, resource));
            long bytes = ByteStreams.copy(in, out);
            in.close();
            out.hflush();
            out.close();
            LOGGER.info("Copying " + resource + " to " + dest + ", bytes " + bytes);
        }
    }

    public static Ini loadFromPath(FileSystem fileSystem, Path path) throws IOException {
        InputStream inputStream = null;
        try {
            LOGGER.info("Opening " + path);
            inputStream = fileSystem.open(path);
            Ini ini = new Ini();
            ini.load(inputStream);
            return ini;
        } finally {
            if (inputStream != null) {
                try {
                    inputStream.close();
                } catch (IOException e) {
                    LOGGER.warn("Error closing " + inputStream);
                }
            }
        }
    }

}