diff --git a/test_04/.gitignore b/test_04/.gitignore new file mode 100644 index 0000000..efb8c7d --- /dev/null +++ b/test_04/.gitignore @@ -0,0 +1,6 @@ +/out/* +/.idea/uiDesigner.xml +/.idea/workspace.xml +/.idea/description.xml +/.gradle/* +/build/* diff --git a/test_04/.idea/compiler.xml b/test_04/.idea/compiler.xml new file mode 100644 index 0000000..de3bc4e --- /dev/null +++ b/test_04/.idea/compiler.xml @@ -0,0 +1,9 @@ + + + + + + + + + \ No newline at end of file diff --git a/test_04/.idea/gradle.xml b/test_04/.idea/gradle.xml new file mode 100644 index 0000000..05e5219 --- /dev/null +++ b/test_04/.idea/gradle.xml @@ -0,0 +1,18 @@ + + + + + + \ No newline at end of file diff --git a/test_04/.idea/libraries/Gradle__junit_junit_4_12.xml b/test_04/.idea/libraries/Gradle__junit_junit_4_12.xml new file mode 100644 index 0000000..04c10dd --- /dev/null +++ b/test_04/.idea/libraries/Gradle__junit_junit_4_12.xml @@ -0,0 +1,11 @@ + + + + + + + + + + + \ No newline at end of file diff --git a/test_04/.idea/libraries/Gradle__org_hamcrest_hamcrest_core_1_3.xml b/test_04/.idea/libraries/Gradle__org_hamcrest_hamcrest_core_1_3.xml new file mode 100644 index 0000000..8262f72 --- /dev/null +++ b/test_04/.idea/libraries/Gradle__org_hamcrest_hamcrest_core_1_3.xml @@ -0,0 +1,11 @@ + + + + + + + + + + + \ No newline at end of file diff --git a/test_04/.idea/misc.xml b/test_04/.idea/misc.xml new file mode 100644 index 0000000..e208459 --- /dev/null +++ b/test_04/.idea/misc.xml @@ -0,0 +1,6 @@ + + + + + + \ No newline at end of file diff --git a/test_04/.idea/modules.xml b/test_04/.idea/modules.xml new file mode 100644 index 0000000..0868169 --- /dev/null +++ b/test_04/.idea/modules.xml @@ -0,0 +1,10 @@ + + + + + + + + + + \ No newline at end of file diff --git a/test_04/.idea/modules/test_04.iml b/test_04/.idea/modules/test_04.iml new file mode 100644 index 0000000..24e7c18 --- /dev/null +++ b/test_04/.idea/modules/test_04.iml @@ -0,0 +1,13 @@ + + + + + + + + + + + + + \ No newline at end of file diff --git a/test_04/.idea/modules/test_04_main.iml b/test_04/.idea/modules/test_04_main.iml new file mode 100644 index 0000000..f5bb224 --- /dev/null +++ b/test_04/.idea/modules/test_04_main.iml @@ -0,0 +1,13 @@ + + + + + + + + + + + + + \ No newline at end of file diff --git a/test_04/.idea/modules/test_04_test.iml b/test_04/.idea/modules/test_04_test.iml new file mode 100644 index 0000000..21cba8c --- /dev/null +++ b/test_04/.idea/modules/test_04_test.iml @@ -0,0 +1,17 @@ + + + + + + + + + + + + + + + + + \ No newline at end of file diff --git a/test_04/build.gradle b/test_04/build.gradle new file mode 100644 index 0000000..d11788f --- /dev/null +++ b/test_04/build.gradle @@ -0,0 +1,14 @@ +group 'test_04' +version '1.0-SNAPSHOT' + +apply plugin: 'java' + +sourceCompatibility = 1.8 + +repositories { + mavenCentral() +} + +dependencies { + testCompile group: 'junit', name: 'junit', version: '4.12' +} diff --git a/test_04/gradle/wrapper/gradle-wrapper.jar b/test_04/gradle/wrapper/gradle-wrapper.jar new file mode 100644 index 0000000..8dae96c Binary files /dev/null and b/test_04/gradle/wrapper/gradle-wrapper.jar differ diff --git a/test_04/gradle/wrapper/gradle-wrapper.properties b/test_04/gradle/wrapper/gradle-wrapper.properties new file mode 100644 index 0000000..157b816 --- /dev/null +++ b/test_04/gradle/wrapper/gradle-wrapper.properties @@ -0,0 +1,6 @@ +#Fri Apr 13 16:25:04 MSK 2018 +distributionBase=GRADLE_USER_HOME +distributionPath=wrapper/dists +zipStoreBase=GRADLE_USER_HOME +zipStorePath=wrapper/dists +distributionUrl=https\://services.gradle.org/distributions/gradle-3.5-rc-2-bin.zip diff --git a/test_04/gradlew b/test_04/gradlew new file mode 100755 index 0000000..4453cce --- /dev/null +++ b/test_04/gradlew @@ -0,0 +1,172 @@ +#!/usr/bin/env sh + +############################################################################## +## +## Gradle start up script for UN*X +## +############################################################################## + +# Attempt to set APP_HOME +# Resolve links: $0 may be a link +PRG="$0" +# Need this for relative symlinks. +while [ -h "$PRG" ] ; do + ls=`ls -ld "$PRG"` + link=`expr "$ls" : '.*-> \(.*\)$'` + if expr "$link" : '/.*' > /dev/null; then + PRG="$link" + else + PRG=`dirname "$PRG"`"/$link" + fi +done +SAVED="`pwd`" +cd "`dirname \"$PRG\"`/" >/dev/null +APP_HOME="`pwd -P`" +cd "$SAVED" >/dev/null + +APP_NAME="Gradle" +APP_BASE_NAME=`basename "$0"` + +# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. +DEFAULT_JVM_OPTS="" + +# Use the maximum available, or set MAX_FD != -1 to use that value. +MAX_FD="maximum" + +warn ( ) { + echo "$*" +} + +die ( ) { + echo + echo "$*" + echo + exit 1 +} + +# OS specific support (must be 'true' or 'false'). +cygwin=false +msys=false +darwin=false +nonstop=false +case "`uname`" in + CYGWIN* ) + cygwin=true + ;; + Darwin* ) + darwin=true + ;; + MINGW* ) + msys=true + ;; + NONSTOP* ) + nonstop=true + ;; +esac + +CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar + +# Determine the Java command to use to start the JVM. +if [ -n "$JAVA_HOME" ] ; then + if [ -x "$JAVA_HOME/jre/sh/java" ] ; then + # IBM's JDK on AIX uses strange locations for the executables + JAVACMD="$JAVA_HOME/jre/sh/java" + else + JAVACMD="$JAVA_HOME/bin/java" + fi + if [ ! -x "$JAVACMD" ] ; then + die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME + +Please set the JAVA_HOME variable in your environment to match the +location of your Java installation." + fi +else + JAVACMD="java" + which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. + +Please set the JAVA_HOME variable in your environment to match the +location of your Java installation." +fi + +# Increase the maximum file descriptors if we can. +if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then + MAX_FD_LIMIT=`ulimit -H -n` + if [ $? -eq 0 ] ; then + if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then + MAX_FD="$MAX_FD_LIMIT" + fi + ulimit -n $MAX_FD + if [ $? -ne 0 ] ; then + warn "Could not set maximum file descriptor limit: $MAX_FD" + fi + else + warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT" + fi +fi + +# For Darwin, add options to specify how the application appears in the dock +if $darwin; then + GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\"" +fi + +# For Cygwin, switch paths to Windows format before running java +if $cygwin ; then + APP_HOME=`cygpath --path --mixed "$APP_HOME"` + CLASSPATH=`cygpath --path --mixed "$CLASSPATH"` + JAVACMD=`cygpath --unix "$JAVACMD"` + + # We build the pattern for arguments to be converted via cygpath + ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null` + SEP="" + for dir in $ROOTDIRSRAW ; do + ROOTDIRS="$ROOTDIRS$SEP$dir" + SEP="|" + done + OURCYGPATTERN="(^($ROOTDIRS))" + # Add a user-defined pattern to the cygpath arguments + if [ "$GRADLE_CYGPATTERN" != "" ] ; then + OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)" + fi + # Now convert the arguments - kludge to limit ourselves to /bin/sh + i=0 + for arg in "$@" ; do + CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -` + CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option + + if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition + eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"` + else + eval `echo args$i`="\"$arg\"" + fi + i=$((i+1)) + done + case $i in + (0) set -- ;; + (1) set -- "$args0" ;; + (2) set -- "$args0" "$args1" ;; + (3) set -- "$args0" "$args1" "$args2" ;; + (4) set -- "$args0" "$args1" "$args2" "$args3" ;; + (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;; + (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;; + (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;; + (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;; + (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;; + esac +fi + +# Escape application args +save ( ) { + for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done + echo " " +} +APP_ARGS=$(save "$@") + +# Collect all arguments for the java command, following the shell quoting and substitution rules +eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS" + +# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong +if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then + cd "$(dirname "$0")" +fi + +exec "$JAVACMD" "$@" diff --git a/test_04/gradlew.bat b/test_04/gradlew.bat new file mode 100644 index 0000000..e95643d --- /dev/null +++ b/test_04/gradlew.bat @@ -0,0 +1,84 @@ +@if "%DEBUG%" == "" @echo off +@rem ########################################################################## +@rem +@rem Gradle startup script for Windows +@rem +@rem ########################################################################## + +@rem Set local scope for the variables with windows NT shell +if "%OS%"=="Windows_NT" setlocal + +set DIRNAME=%~dp0 +if "%DIRNAME%" == "" set DIRNAME=. +set APP_BASE_NAME=%~n0 +set APP_HOME=%DIRNAME% + +@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. +set DEFAULT_JVM_OPTS= + +@rem Find java.exe +if defined JAVA_HOME goto findJavaFromJavaHome + +set JAVA_EXE=java.exe +%JAVA_EXE% -version >NUL 2>&1 +if "%ERRORLEVEL%" == "0" goto init + +echo. +echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. +echo. +echo Please set the JAVA_HOME variable in your environment to match the +echo location of your Java installation. + +goto fail + +:findJavaFromJavaHome +set JAVA_HOME=%JAVA_HOME:"=% +set JAVA_EXE=%JAVA_HOME%/bin/java.exe + +if exist "%JAVA_EXE%" goto init + +echo. +echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% +echo. +echo Please set the JAVA_HOME variable in your environment to match the +echo location of your Java installation. + +goto fail + +:init +@rem Get command-line arguments, handling Windows variants + +if not "%OS%" == "Windows_NT" goto win9xME_args + +:win9xME_args +@rem Slurp the command line arguments. +set CMD_LINE_ARGS= +set _SKIP=2 + +:win9xME_args_slurp +if "x%~1" == "x" goto execute + +set CMD_LINE_ARGS=%* + +:execute +@rem Setup the command line + +set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar + +@rem Execute Gradle +"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS% + +:end +@rem End local scope for the variables with windows NT shell +if "%ERRORLEVEL%"=="0" goto mainEnd + +:fail +rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of +rem the _cmd.exe /c_ return code! +if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 +exit /b 1 + +:mainEnd +if "%OS%"=="Windows_NT" endlocal + +:omega diff --git a/test_04/settings.gradle b/test_04/settings.gradle new file mode 100644 index 0000000..fcc3369 --- /dev/null +++ b/test_04/settings.gradle @@ -0,0 +1,2 @@ +rootProject.name = 'test_04' + diff --git a/test_04/src/main/java/com/mikhail/pravilov/mit/checkSum/CheckSum.java b/test_04/src/main/java/com/mikhail/pravilov/mit/checkSum/CheckSum.java new file mode 100644 index 0000000..e9b57a4 --- /dev/null +++ b/test_04/src/main/java/com/mikhail/pravilov/mit/checkSum/CheckSum.java @@ -0,0 +1,29 @@ +package com.mikhail.pravilov.mit.checkSum; + +import java.io.IOException; +import java.nio.file.Path; +import java.nio.file.Paths; +import java.security.NoSuchAlgorithmException; +import java.util.concurrent.ForkJoinPool; + +public class CheckSum { + + public static void main(String[] args) throws IOException, NoSuchAlgorithmException { + Path path = Paths.get(System.getProperty("user.dir")); + System.out.println("One thread:"); + long startTime = System.nanoTime(); + byte[] checkSum = CheckSummer.getCheckSum(path); + long endTime = System.nanoTime(); + long totalTime = endTime - startTime; + System.out.println("Time: " + totalTime); + System.out.println("Result: " + new String(checkSum)); + System.out.println("-----------------------------"); + System.out.println("Fork Join:"); + startTime = System.nanoTime(); + checkSum = ForkJoinCheckSummer.getCheckSum(path); + endTime = System.nanoTime(); + totalTime = endTime - startTime; + System.out.println("Time: " + totalTime); + System.out.println("Result: " + new String(checkSum)); + } +} diff --git a/test_04/src/main/java/com/mikhail/pravilov/mit/checkSum/CheckSummer.java b/test_04/src/main/java/com/mikhail/pravilov/mit/checkSum/CheckSummer.java new file mode 100644 index 0000000..244ad65 --- /dev/null +++ b/test_04/src/main/java/com/mikhail/pravilov/mit/checkSum/CheckSummer.java @@ -0,0 +1,43 @@ +package com.mikhail.pravilov.mit.checkSum; + +import java.io.IOException; +import java.io.InputStream; +import java.nio.file.Files; +import java.nio.file.Path; +import java.security.DigestInputStream; +import java.security.MessageDigest; +import java.security.NoSuchAlgorithmException; +import java.util.Collection; +import java.util.stream.Collectors; + +/** + * Implements single thread check summer. + */ +public class CheckSummer { + /** + * Calculates check sum of given path and subpaths. + * @param path where to calculate check sum. + * @return MD5 hash sum. + * @throws NoSuchAlgorithmException if MD5 not supported by {@link MessageDigest}. + * @throws IOException if problems occurred during working with paths. + */ + public static byte[] getCheckSum(Path path) throws NoSuchAlgorithmException, IOException { + MessageDigest md5Hash = MessageDigest.getInstance("MD5"); + if (!Files.isDirectory(path)) { + byte[] bufferJustToRead = new byte[1024]; + try (InputStream is = Files.newInputStream(path); + DigestInputStream dis = new DigestInputStream(is, md5Hash)) { + while (dis.read(bufferJustToRead) != -1) { + } + } + } + else { + md5Hash.update(path.getFileName().toString().getBytes()); + Collection subFiles = Files.walk(path).filter(Files::isRegularFile).collect(Collectors.toList()); + for (Path subFile : subFiles) { + md5Hash.update(getCheckSum(subFile)); + } + } + return md5Hash.digest(); + } +} diff --git a/test_04/src/main/java/com/mikhail/pravilov/mit/checkSum/ForkJoinCheckSummer.java b/test_04/src/main/java/com/mikhail/pravilov/mit/checkSum/ForkJoinCheckSummer.java new file mode 100644 index 0000000..92232d3 --- /dev/null +++ b/test_04/src/main/java/com/mikhail/pravilov/mit/checkSum/ForkJoinCheckSummer.java @@ -0,0 +1,87 @@ +package com.mikhail.pravilov.mit.checkSum; + +import java.io.IOException; +import java.io.InputStream; +import java.nio.file.Files; +import java.nio.file.Path; +import java.security.DigestInputStream; +import java.security.MessageDigest; +import java.security.NoSuchAlgorithmException; +import java.util.ArrayList; +import java.util.Collection; +import java.util.concurrent.ForkJoinPool; +import java.util.concurrent.RecursiveTask; +import java.util.stream.Collectors; + +/** + * Class that implements static method to get get check sum of path with {@link ForkJoinPool}. + */ +public class ForkJoinCheckSummer { + /** + * Calculates check sum with MD5. + * @param path where to calculate check sum. + * @return check sum. + */ + public static byte[] getCheckSum(Path path) { + return new ForkJoinPool().invoke(new ForkJoinCheckSummerTask(path)); + } + + /** + * Task for ForkJoinPool. + */ + private static class ForkJoinCheckSummerTask extends RecursiveTask { + private Path path; + + /** + * Creates check sum task with given path. + * @param path where to calculate check sum. + */ + ForkJoinCheckSummerTask(Path path) { + this.path = path; + } + + @Override + protected byte[] compute() { + MessageDigest md5Hash; + try { + md5Hash = MessageDigest.getInstance("MD5"); + } catch (NoSuchAlgorithmException e) { + completeExceptionally(e); + return null; + } + if (!Files.isDirectory(path)) { + byte[] bufferJustToRead = new byte[1024]; + try (InputStream is = Files.newInputStream(path); + DigestInputStream dis = new DigestInputStream(is, md5Hash)) { + while (dis.read(bufferJustToRead) != -1) { + } + } catch (IOException e) { + completeExceptionally(e); + return null; + } + return md5Hash.digest(); + } + else { + ArrayList tasks = new ArrayList<>(); + md5Hash.update(path.getFileName().toString().getBytes()); + Collection subFiles; + try { + subFiles = Files.walk(path).filter(Files::isRegularFile).collect(Collectors.toList()); + } catch (IOException e) { + completeExceptionally(e); + return null; + } + for (Path subFile : subFiles) { + ForkJoinCheckSummerTask newTask = new ForkJoinCheckSummerTask(subFile); + newTask.fork(); + tasks.add(newTask); + } + for (ForkJoinCheckSummerTask task : tasks) { + byte[] checkSumInSubFile = task.join(); + md5Hash.update(checkSumInSubFile); + } + } + return md5Hash.digest(); + } + } +} diff --git a/test_04/src/test/java/com/mikhail/pravilov/mit/checkSum/CheckSummerTest.java b/test_04/src/test/java/com/mikhail/pravilov/mit/checkSum/CheckSummerTest.java new file mode 100644 index 0000000..f1e9d2f --- /dev/null +++ b/test_04/src/test/java/com/mikhail/pravilov/mit/checkSum/CheckSummerTest.java @@ -0,0 +1,66 @@ +package com.mikhail.pravilov.mit.checkSum; + +import org.junit.Test; +import java.nio.file.Files; +import java.nio.file.Path; +import java.nio.file.Paths; +import java.security.MessageDigest; + +import static org.junit.Assert.*; + +public class CheckSummerTest { + @Test + public void getCheckSumEmptyDir() throws Exception { + Path path = Paths.get("testDirs/emptyDir/"); + byte[] oneThreadResult = CheckSummer.getCheckSum(path); + byte[] forkJointResult = ForkJoinCheckSummer.getCheckSum(path); + assertArrayEquals(oneThreadResult, forkJointResult); + MessageDigest md = MessageDigest.getInstance("MD5"); + md.update("emptyDir".getBytes()); + assertArrayEquals(md.digest(), forkJointResult); + } + + @Test + public void getCheckSumOneEmptyFile() throws Exception { + Path path = Paths.get("testDirs/oneEmptyFile"); + byte[] oneThreadResult = CheckSummer.getCheckSum(path); + byte[] forkJointResult = ForkJoinCheckSummer.getCheckSum(path); + assertArrayEquals(oneThreadResult, forkJointResult); + MessageDigest md = MessageDigest.getInstance("MD5"); + md.update(Files.readAllBytes(path)); + assertArrayEquals(md.digest(), forkJointResult); + } + + @Test + public void getCheckSumOneFileWithContent() throws Exception { + Path path = Paths.get("testDirs/oneFileWithContent"); + byte[] oneThreadResult = CheckSummer.getCheckSum(path); + byte[] forkJointResult = ForkJoinCheckSummer.getCheckSum(path); + assertArrayEquals(oneThreadResult, forkJointResult); + MessageDigest md = MessageDigest.getInstance("MD5"); + md.update(Files.readAllBytes(path)); + assertArrayEquals(md.digest(), forkJointResult); + } + + @Test + public void getCheckSumDirWithOneFile() throws Exception { + Path path = Paths.get("testDirs/dirWithOneFile"); + byte[] oneThreadResult = CheckSummer.getCheckSum(path); + byte[] forkJointResult = ForkJoinCheckSummer.getCheckSum(path); + assertArrayEquals(oneThreadResult, forkJointResult); + MessageDigest md1 = MessageDigest.getInstance("MD5"); + MessageDigest md2 = MessageDigest.getInstance("MD5"); + md2.update(Files.readAllBytes(Paths.get("testDirs/dirWithOneFile/file"))); + md1.update("dirWithOneFile".getBytes()); + md1.update(md2.digest()); + assertArrayEquals(md1.digest(), oneThreadResult); + } + + @Test + public void getCheckSumHardTest() throws Exception { + Path path = Paths.get("testDirs"); + byte[] oneThreadResult = CheckSummer.getCheckSum(path); + byte[] forkJointResult = ForkJoinCheckSummer.getCheckSum(path); + assertArrayEquals(oneThreadResult, forkJointResult); + } +} \ No newline at end of file diff --git a/test_04/testDirs/dirWithOneFile/file b/test_04/testDirs/dirWithOneFile/file new file mode 100644 index 0000000..24a90d8 --- /dev/null +++ b/test_04/testDirs/dirWithOneFile/file @@ -0,0 +1 @@ +Content \ No newline at end of file diff --git a/test_04/testDirs/oneEmptyFile b/test_04/testDirs/oneEmptyFile new file mode 100644 index 0000000..e69de29 diff --git a/test_04/testDirs/oneFileWithContent b/test_04/testDirs/oneFileWithContent new file mode 100644 index 0000000..24a90d8 --- /dev/null +++ b/test_04/testDirs/oneFileWithContent @@ -0,0 +1 @@ +Content \ No newline at end of file