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package org.criu.java.tests;
import java.io.*;
import java.lang.management.ManagementFactory;
import java.lang.management.RuntimeMXBean;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;
import java.nio.channels.FileChannel.MapMode;
import java.nio.file.StandardOpenOption;
import java.util.logging.Level;
import java.util.logging.Logger;
class MultipleFileRead {
private static String TESTNAME = "MultipleFileRead";
/**
* @param readFile1 File 1 whose contents are read.
* @param readFile2 File 2 whose contents are read.
* @param writeFile File in which data has been written to.
* @return true if the data written is as expected, false otherwise.
* @throws IOException
*/
private static boolean compare(File readFile1, File readFile2, File writeFile) throws IOException {
BufferedReader br1 = new BufferedReader(new FileReader(readFile1));
BufferedReader br2 = new BufferedReader(new FileReader(readFile2));
BufferedReader brw = new BufferedReader(new FileReader(writeFile));
boolean eof1, eof2;
eof1 = false;
eof2 = false;
String inpString, wrtString;
while (!eof1 || !eof2) {
if (!eof1) {
inpString = br1.readLine();
if (null == inpString) {
eof1 = true;
} else {
wrtString = brw.readLine();
if (null == wrtString) {
return false;
}
if (!wrtString.equals(inpString)) {
return false;
}
}
}
if (!eof2) {
inpString = br2.readLine();
if (null == inpString) {
eof2 = true;
} else {
wrtString = brw.readLine();
if (null == wrtString) {
return false;
}
if (!wrtString.equals(inpString)) {
return false;
}
}
}
}
wrtString = brw.readLine();
if (null != wrtString) {
return false;
}
br1.close();
br2.close();
brw.close();
return true;
}
/**
* Read from multiple files and write their content into another file,
* checkpointing and restoring in between.
*
* @param args Not used.
*/
public static void main(String[] args) {
MappedByteBuffer b = null;
String s;
int i = 0;
Logger logger = null;
try {
logger = Logger.getLogger(Helper.PACKAGE_NAME + "." + TESTNAME);
File f = new File(Helper.MEMORY_MAPPED_FILE_NAME);
File readFile1 = new File(Helper.SOURCE_FOLDER + "/" + "FileRead.java");
File readFile2 = new File(Helper.SOURCE_FOLDER + "/" + "ReadWrite.java");
File writeFile = new File(Helper.OUTPUT_FOLDER_NAME + "/" + TESTNAME + "/" + "MultipleFileRead_file.txt");
boolean eofFile1 = false, eofFile2 = false, check;
RuntimeMXBean bean = ManagementFactory.getRuntimeMXBean();
String pid = bean.getName();
int val = Helper.init(TESTNAME, pid, logger);
if (0 != val) {
logger.log(Level.SEVERE, "Helper.init returned a non-zero code.");
b.putChar(Helper.MAPPED_INDEX, Helper.STATE_END);
System.exit(1);
}
logger.log(Level.INFO, "Test init done; pid written to pid file; beginning with test");
FileChannel channel = FileChannel.open(f.toPath(), StandardOpenOption.READ, StandardOpenOption.WRITE, StandardOpenOption.CREATE);
b = channel.map(MapMode.READ_WRITE, 0, Helper.MAPPED_REGION_SIZE);
channel.close();
/*
* Mapped Byte Buffer should be in init state at the beginning of test
*/
if (b.getChar(Helper.MAPPED_INDEX) != Helper.STATE_INIT) {
logger.log(Level.SEVERE, "Error: Error in memory mapping, test is not in init state");
b.putChar(Helper.MAPPED_INDEX, Helper.STATE_END);
System.exit(1);
}
logger.log(Level.INFO, "Checking existence of the read files");
if (!readFile1.exists()) {
logger.log(Level.SEVERE, "Error: File from which to read does not exist");
b.putChar(Helper.MAPPED_INDEX, Helper.STATE_END);
System.exit(1);
}
if (!readFile2.exists()) {
logger.log(Level.SEVERE, "Error: File from which to read does not exist");
b.putChar(Helper.MAPPED_INDEX, Helper.STATE_END);
System.exit(1);
}
if (writeFile.exists()) {
writeFile.delete();
}
logger.log(Level.INFO, "Creating writeFile");
boolean newFile = writeFile.createNewFile();
if (!newFile) {
logger.log(Level.SEVERE, "Error: Cannot create a new file to write to.");
b.putChar(Helper.MAPPED_INDEX, Helper.STATE_END);
System.exit(1);
}
BufferedReader br1 = new BufferedReader(new FileReader(readFile1));
BufferedReader br2 = new BufferedReader(new FileReader(readFile2));
BufferedWriter brw = new BufferedWriter(new FileWriter(writeFile));
logger.log(Level.INFO, "Writing in file");
while (!eofFile1 || !eofFile2) {
if (!eofFile1) {
s = br1.readLine();
i++;
if (null == s) {
eofFile1 = true;
} else {
brw.write(s + "\n");
}
}
if (!eofFile2) {
s = br2.readLine();
i++;
if (null == s) {
eofFile2 = true;
} else {
brw.write(s + "\n");
}
}
if (10 == i) {
/*
* Checkpoint and Restore
*/
logger.log(Level.INFO, "Going to checkpoint");
Helper.checkpointAndWait(b, logger);
logger.log(Level.INFO, "Test has been restored!");
}
}
brw.flush();
logger.log(Level.INFO, "Checking the content of the file");
check = compare(readFile1, readFile2, writeFile);
if (!check) {
logger.log(Level.SEVERE, "Error: Files are not similar after writing");
b.putChar(Helper.MAPPED_INDEX, Helper.STATE_FAIL);
System.exit(1);
}
logger.log(Level.INFO, "The file has been written as expected");
logger.log(Level.INFO, Helper.PASS_MESSAGE);
br1.close();
br2.close();
brw.close();
b.putChar(Helper.MAPPED_INDEX, Helper.STATE_PASS);
System.exit(0);
} catch (Exception e) {
if (null != logger) {
StringWriter writer = new StringWriter();
PrintWriter printWriter = new PrintWriter(writer);
e.printStackTrace(printWriter);
logger.log(Level.SEVERE, "Exception occurred:" + e);
logger.log(Level.FINE, writer.toString());
}
if (null != b) {
b.putChar(Helper.MAPPED_INDEX, Helper.STATE_FAIL);
}
System.exit(5);
}
}
}
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