org.apache.hadoop.fs.redfish.RedfishDataOutputStream.java Source code

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Here is the source code for org.apache.hadoop.fs.redfish.RedfishDataOutputStream.java

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/*
 * Copyright 2011-2012 the Redfish authors
 *
 * 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 org.apache.hadoop.fs.redfish;

import java.io.*;
import java.net.*;

import org.apache.commons.logging.Log;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.FileUtil;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.Syncable;

class RedfishDataOutputStream extends OutputStream implements Syncable, Closeable, Flushable {
    private long m_ofe;

    static {
        try {
            System.loadLibrary("hfishc");
        } catch (UnsatisfiedLinkError e) {
            e.printStackTrace();
            System.err.println("Unable to load hfishc: " + System.getProperty("java.library.path"));
            System.exit(1);
        }
    }

    private RedfishDataOutputStream(long ofe) {
        m_ofe = ofe;
    }

    /* This finalizer is intended to free the (small!) amount of memory used by
     * the redfish_file data structure of a closed file.  It also destroys the
     * pthread mutex used to make the rest of the functions thread-safe.
     *
     * Please call close() explicitly to close files.  This it NOT intended as a
     * replacement for that function.
     * */
    protected void finalize() throws Throwable {
    }

    {
        this.redfishFree();
    }

    @Override
    public void write(int b) throws IOException {
        /* The oh-so-useful "write a single byte" method */
        byte[] buf = new byte[1];
        buf[0] = (byte) b;
        write(buf, 0, 1);
    }

    @Override
    public native void close() throws IOException;

    private native void redfishFree();

    @Override
    public native void write(byte[] jarr, int off, int len) throws IOException;

    @Override
    public native void flush() throws IOException;

    @Override
    public native void sync() throws IOException;
}