slina.mb.utils.LogFileReaderImpl.java Source code

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Here is the source code for slina.mb.utils.LogFileReaderImpl.java

Source

/*
 *    This file is part of Slina web log.
 *
 *   Slina web log is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   Slina web log is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with Foobar.  If not, see <http://www.gnu.org/licenses/>.
 */
package slina.mb.utils;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

import org.apache.log4j.Logger;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;

/**
 * @author anil
 */
public class LogFileReaderImpl implements LogFileReader {

    private static final Logger LOGGER = Logger.getLogger(LogFileReaderImpl.class);
    private boolean checkClassPath = false;

    @Override
    public List<String> readFile(String fileName) {

        List<String> lines = new ArrayList<String>();

        try {

            long before = System.currentTimeMillis();

            File file = new File(fileName);

            if (!file.isFile()) {

                if (this.checkClassPath) {

                    Resource classPathResource = new ClassPathResource(fileName);
                    file = classPathResource.getFile();
                }

            }

            BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(file)));
            String line = reader.readLine();

            while (line != null) {
                lines.add(line);
                line = reader.readLine();
            }

            long after = System.currentTimeMillis();
            reader.close();
            LOGGER.info("conv. run took " + (after - before) + " ms, size = " + lines.size());
            return lines;

        } catch (IOException e) {
            LOGGER.error(e);
            return lines;
        }

    }

    public List<String> readFile(Resource resource) {

        List<String> lines = new ArrayList<String>();

        try {

            long before = System.currentTimeMillis();

            File file = resource.getFile();

            BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(file)));
            String line = reader.readLine();

            while (line != null) {
                lines.add(line);
                line = reader.readLine();
            }

            long after = System.currentTimeMillis();
            reader.close();
            LOGGER.info("conv. run took " + (after - before) + " ms, size = " + lines.size());
            return lines;

        } catch (IOException e) {
            LOGGER.error(e);
            return lines;
        }

    }

    public List<String> readFile(File file) {

        String var = file.getAbsolutePath();
        return this.readFile(var);
    }

    /**
     * readFileTest is faster
     * @param fileName
     * @return
     * @throws IOException
     */
    public List<String> readnio(String fileName) throws IOException {

        List<String> lines = new ArrayList<String>();
        long before = System.currentTimeMillis();

        Scanner scanner = new Scanner(new FileReader(fileName));

        while (scanner.hasNext()) {
            lines.add(scanner.next());
        }

        long after = System.currentTimeMillis();
        System.out.println("nio run took " + (after - before) + " ms");
        return lines;

    }

    public boolean isCheckClassPath() {
        return checkClassPath;
    }

    public void setCheckClassPath(boolean checkClassPath) {
        this.checkClassPath = checkClassPath;
    }

}