com.linkedin.pinot.core.indexsegment.utils.InputOutputStreamUtils.java Source code

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Here is the source code for com.linkedin.pinot.core.indexsegment.utils.InputOutputStreamUtils.java

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/**
 * Copyright (C) 2014-2015 LinkedIn Corp. (pinot-core@linkedin.com)
 *
 * Licensed 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 com.linkedin.pinot.core.indexsegment.utils;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;

import com.linkedin.pinot.core.data.readers.FileSystemMode;

/**
 *
 * Aug 19, 2014
 */
@Deprecated
/**
 * Should not be used, this is carried forward just as an example
 * resources are not closed..
 */
public class InputOutputStreamUtils {
    public static InputStream getDefaultInputStream(String filePath) throws FileNotFoundException {
        return new BufferedInputStream(new FileInputStream(new File(filePath)));
    }

    public static DataOutputStream getDefaultOutputStream(String filePath) throws FileNotFoundException {
        return new DataOutputStream(new BufferedOutputStream(new FileOutputStream(new File(filePath))));
    }

    public static InputStream getInputStream(String filePath, FileSystemMode mode, FileSystem fs)
            throws IOException {
        InputStream is = null;
        switch (mode) {
        case DISK:
            is = new BufferedInputStream(new FileInputStream(new File(filePath)));
            break;
        case HDFS:

            is = new BufferedInputStream(fs.open(new Path(filePath)));
            break;
        default:
            throw new UnsupportedOperationException();
        }
        return is;
    }

    public static DataOutputStream getOutputStream(String filePath, FileSystemMode mode, FileSystem fs) {
        try {
            DataOutputStream is = null;
            switch (mode) {
            case DISK:
                File newFile = new File(filePath);
                if (!newFile.exists()) {
                    if (!newFile.getParentFile().exists()) {
                        newFile.getParentFile().mkdirs();
                    }
                    newFile.createNewFile();
                }
                is = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(new File(filePath))));
                break;
            case HDFS:
                is = fs.create(new Path(filePath));
                break;
            default:
                throw new UnsupportedOperationException();
            }
            return is;
        } catch (Exception ex) {
            throw new RuntimeException(ex);
        }
    }

    public static DataOutputStream getAppendOutputStream(String filePath, FileSystemMode mode, FileSystem fs) {
        try {
            DataOutputStream is = null;
            switch (mode) {
            case DISK:
                File appendFile = new File(filePath);
                if (!appendFile.exists()) {
                    if (!appendFile.getParentFile().exists()) {
                        appendFile.getParentFile().mkdirs();
                    }
                    appendFile.createNewFile();
                }
                is = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(appendFile, true)));
                break;
            case HDFS:
                is = fs.append(new Path(filePath));
                break;
            default:
                throw new UnsupportedOperationException();
            }
            return is;
        } catch (Exception ex) {
            throw new RuntimeException(ex);
        }
    }
}