modules/core/src/test/java/org/apache/ignite/jvmtest/MultipleFileIOTest.java

/*
 * 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.ignite.jvmtest;

import java.io.File;
import java.io.FileOutputStream;
import java.io.RandomAccessFile;
import java.util.Date;
import org.apache.ignite.internal.util.typedef.F;

/**
 *
 */
public class MultipleFileIOTest {
    /** Temp dir. */
    private static final String TMP_DIR = System.getProperty("java.io.tmpdir");

    /**
     *
     */
    private MultipleFileIOTest() {
        // No-op.
    }

    /**
     * @param args Args.
     * @throws Exception If failed.
     */
    @SuppressWarnings({"TooBroadScope"})
    public static void main(String args[]) throws Exception {
        File parent = new File(TMP_DIR, "testMultipleFilesCreation");

        System.out.println("Deleting: " + new Date());

        delete(parent);
        parent.mkdirs();

        int childCnt = 10;
        int subChildCnt = 10;
        boolean useRaf = true;

        if (args.length > 0) {
            childCnt = Integer.parseInt(args[0]);
            subChildCnt = Integer.parseInt(args[1]);
        }

        if (args.length > 3)
            useRaf = Boolean.parseBoolean(args[2]);

        for (int i = 0; i < childCnt; i++) {
            File f = new File(parent, String.valueOf(i));

            f.mkdirs();

            for (int j = 0; j < subChildCnt; j++)
                new File(f, String.valueOf(j)).mkdirs();
        }

        System.out.println("Test started: " + new Date());
        System.out.println("Parent: " + parent.getAbsolutePath());

        long start = System.currentTimeMillis();

        byte[] data = new byte[4096];

        for (int i = 0; i < 50000; i++) {
            int idx1 = i % childCnt;
            int idx2 = (i / childCnt) % subChildCnt;

            File f = new File(parent, idx1 + File.separator + idx2 + File.separatorChar + i);

            if (useRaf) {
                RandomAccessFile raf = null;

                try {
                    raf = new RandomAccessFile(f, "rw");

                    raf.write(data);
                }
                finally {
                    if (raf != null)
                        raf.close();
                }
            }
            else {
                FileOutputStream fos = null;

                try {
                    fos = new FileOutputStream(f);

                    fos.write(data);
                }
                finally {
                    if (fos != null)
                        fos.close();
                }
            }
        }

        System.out.println("Test time: " + (System.currentTimeMillis() - start));
    }

    /**
     * @param f File to delete.
     */
    private static void delete(File f) {
        assert f != null;

        if (f.isDirectory()) {
            File[] files = f.listFiles();

            if (!F.isEmpty(files)) {
                for (File f0 : files)
                    delete(f0);
            }
        }

        f.delete();
    }
}