├── .gitignore ├── .idea ├── compiler.xml ├── copyright │ ├── Egorand.xml │ └── profiles_settings.xml ├── encodings.xml ├── gradle.xml ├── libraries │ ├── Gradle__junit_junit_4_12.xml │ ├── Gradle__org_hamcrest_hamcrest_core_1_3.xml │ ├── Gradle__org_jetbrains_kotlin_kotlin_runtime_1_0_5_3.xml │ └── Gradle__org_jetbrains_kotlin_kotlin_stdlib_1_0_5_3.xml ├── misc.xml ├── modules.xml ├── modules │ ├── kotlin-concurrency-primitives.iml │ ├── kotlin-concurrency-primitives_main.iml │ └── kotlin-concurrency-primitives_test.iml ├── scopes │ └── Egorand.xml ├── vcs.xml └── workspace.xml ├── LICENSE ├── README.md ├── build.gradle ├── gradle └── wrapper │ └── gradle-wrapper.properties ├── gradlew ├── gradlew.bat ├── settings.gradle └── src └── main ├── java └── me │ └── egorand │ └── kotlin │ └── concurrency │ ├── SynchronizedExampleJava.java │ ├── ThreadCreationExampleJava.java │ ├── VolatileExampleJava.java │ └── WaitNotifyExampleJava.java └── kotlin └── me └── egorand └── kotlin └── concurrency ├── SynchronizedExampleKotlin.kt ├── ThreadCreationExampleKotlin.kt ├── VolatileExampleKotlin.kt └── WaitNotifyExampleKotlin.kt /.gitignore: -------------------------------------------------------------------------------- 1 | # Created by .ignore support plugin (hsz.mobi) 2 | ### Gradle template 3 | .gradle 4 | /build/ 5 | 6 | # Ignore Gradle GUI config 7 | gradle-app.setting 8 | 9 | # Avoid ignoring Gradle wrapper jar file (.jar files are usually ignored) 10 | !gradle-wrapper.jar 11 | 12 | # Cache of project 13 | .gradletasknamecache 14 | 15 | # # Work around https://youtrack.jetbrains.com/issue/IDEA-116898 16 | # gradle/wrapper/gradle-wrapper.properties 17 | ### Java template 18 | *.class 19 | 20 | # BlueJ files 21 | *.ctxt 22 | 23 | # Mobile Tools for Java (J2ME) 24 | .mtj.tmp/ 25 | 26 | # Package Files # 27 | *.jar 28 | *.war 29 | *.ear 30 | 31 | # virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml 32 | hs_err_pid* 33 | 34 | -------------------------------------------------------------------------------- /.idea/compiler.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | -------------------------------------------------------------------------------- /.idea/copyright/Egorand.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 6 | -------------------------------------------------------------------------------- /.idea/copyright/profiles_settings.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | -------------------------------------------------------------------------------- /.idea/encodings.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | -------------------------------------------------------------------------------- /.idea/gradle.xml: 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/.idea/libraries/Gradle__org_jetbrains_kotlin_kotlin_stdlib_1_0_5_3.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /.idea/misc.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | -------------------------------------------------------------------------------- /.idea/modules.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | -------------------------------------------------------------------------------- /.idea/modules/kotlin-concurrency-primitives.iml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | -------------------------------------------------------------------------------- /.idea/modules/kotlin-concurrency-primitives_main.iml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 19 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | -------------------------------------------------------------------------------- /.idea/modules/kotlin-concurrency-primitives_test.iml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | -------------------------------------------------------------------------------- /.idea/scopes/Egorand.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | -------------------------------------------------------------------------------- /.idea/vcs.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 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| 1006 | 1007 | 1008 | 1009 | 1010 | Egorand 1011 | 1012 | 1017 | 1018 | 1019 | 1020 | 1021 | 1022 | 1.8 1023 | 1024 | 1029 | 1030 | 1031 | 1032 | 1033 | 1034 | Egorand 1035 | 1036 | 1041 | 1042 | 1043 | 1044 | 1045 | 1046 | 1047 | 1048 | 1049 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright {yyyy} {name of copyright owner} 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. 202 | 203 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # kotlin-concurrency-primitives 2 | 3 | Demo project that showcases the usage of various concurrency primitives in Java and Kotlin. Check out 4 | [Concurrency Primitives in Kotlin](https://blog.egorand.me/concurrency-primitives-in-kotlin/). 5 | 6 | License 7 | ------- 8 | 9 | Copyright 2016 Egor Andreevici 10 | 11 | Licensed under the Apache License, Version 2.0 (the "License"); 12 | you may not use this file except in compliance with the License. 13 | You may obtain a copy of the License at 14 | 15 | http://www.apache.org/licenses/LICENSE-2.0 16 | 17 | Unless required by applicable law or agreed to in writing, software 18 | distributed under the License is distributed on an "AS IS" BASIS, 19 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 20 | See the License for the specific language governing permissions and 21 | limitations under the License. 22 | -------------------------------------------------------------------------------- /build.gradle: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2016 Egor Andreevici 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | buildscript { 18 | ext.kotlin_version = '1.0.5-3' 19 | 20 | repositories { 21 | mavenCentral() 22 | } 23 | dependencies { 24 | classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version" 25 | } 26 | } 27 | 28 | apply plugin: 'java' 29 | apply plugin: 'kotlin' 30 | 31 | sourceCompatibility = 1.7 32 | 33 | repositories { 34 | mavenCentral() 35 | } 36 | 37 | dependencies { 38 | compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version" 39 | testCompile 'junit:junit:4.12' 40 | } 41 | -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.properties: -------------------------------------------------------------------------------- 1 | #Sun Dec 18 21:20:28 CET 2016 2 | distributionBase=GRADLE_USER_HOME 3 | distributionPath=wrapper/dists 4 | zipStoreBase=GRADLE_USER_HOME 5 | zipStorePath=wrapper/dists 6 | distributionUrl=https\://services.gradle.org/distributions/gradle-3.2.1-bin.zip 7 | -------------------------------------------------------------------------------- /gradlew: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env bash 2 | 3 | ############################################################################## 4 | ## 5 | ## Gradle start up script for UN*X 6 | ## 7 | ############################################################################## 8 | 9 | # Attempt to set APP_HOME 10 | # Resolve links: $0 may be a link 11 | PRG="$0" 12 | # Need this for relative symlinks. 13 | while [ -h "$PRG" ] ; do 14 | ls=`ls -ld "$PRG"` 15 | link=`expr "$ls" : '.*-> \(.*\)$'` 16 | if expr "$link" : '/.*' > /dev/null; then 17 | PRG="$link" 18 | else 19 | PRG=`dirname "$PRG"`"/$link" 20 | fi 21 | done 22 | SAVED="`pwd`" 23 | cd "`dirname \"$PRG\"`/" >/dev/null 24 | APP_HOME="`pwd -P`" 25 | cd "$SAVED" >/dev/null 26 | 27 | APP_NAME="Gradle" 28 | APP_BASE_NAME=`basename "$0"` 29 | 30 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 31 | DEFAULT_JVM_OPTS="" 32 | 33 | # Use the maximum available, or set MAX_FD != -1 to use that value. 34 | MAX_FD="maximum" 35 | 36 | warn ( ) { 37 | echo "$*" 38 | } 39 | 40 | die ( ) { 41 | echo 42 | echo "$*" 43 | echo 44 | exit 1 45 | } 46 | 47 | # OS specific support (must be 'true' or 'false'). 48 | cygwin=false 49 | msys=false 50 | darwin=false 51 | nonstop=false 52 | case "`uname`" in 53 | CYGWIN* ) 54 | cygwin=true 55 | ;; 56 | Darwin* ) 57 | darwin=true 58 | ;; 59 | MINGW* ) 60 | msys=true 61 | ;; 62 | NONSTOP* ) 63 | nonstop=true 64 | ;; 65 | esac 66 | 67 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar 68 | 69 | # Determine the Java command to use to start the JVM. 70 | if [ -n "$JAVA_HOME" ] ; then 71 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then 72 | # IBM's JDK on AIX uses strange locations for the executables 73 | JAVACMD="$JAVA_HOME/jre/sh/java" 74 | else 75 | JAVACMD="$JAVA_HOME/bin/java" 76 | fi 77 | if [ ! -x "$JAVACMD" ] ; then 78 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME 79 | 80 | Please set the JAVA_HOME variable in your environment to match the 81 | location of your Java installation." 82 | fi 83 | else 84 | JAVACMD="java" 85 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 86 | 87 | Please set the JAVA_HOME variable in your environment to match the 88 | location of your Java installation." 89 | fi 90 | 91 | # Increase the maximum file descriptors if we can. 92 | if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then 93 | MAX_FD_LIMIT=`ulimit -H -n` 94 | if [ $? -eq 0 ] ; then 95 | if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then 96 | MAX_FD="$MAX_FD_LIMIT" 97 | fi 98 | ulimit -n $MAX_FD 99 | if [ $? -ne 0 ] ; then 100 | warn "Could not set maximum file descriptor limit: $MAX_FD" 101 | fi 102 | else 103 | warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT" 104 | fi 105 | fi 106 | 107 | # For Darwin, add options to specify how the application appears in the dock 108 | if $darwin; then 109 | GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\"" 110 | fi 111 | 112 | # For Cygwin, switch paths to Windows format before running java 113 | if $cygwin ; then 114 | APP_HOME=`cygpath --path --mixed "$APP_HOME"` 115 | CLASSPATH=`cygpath --path --mixed "$CLASSPATH"` 116 | JAVACMD=`cygpath --unix "$JAVACMD"` 117 | 118 | # We build the pattern for arguments to be converted via cygpath 119 | ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null` 120 | SEP="" 121 | for dir in $ROOTDIRSRAW ; do 122 | ROOTDIRS="$ROOTDIRS$SEP$dir" 123 | SEP="|" 124 | done 125 | OURCYGPATTERN="(^($ROOTDIRS))" 126 | # Add a user-defined pattern to the cygpath arguments 127 | if [ "$GRADLE_CYGPATTERN" != "" ] ; then 128 | OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)" 129 | fi 130 | # Now convert the arguments - kludge to limit ourselves to /bin/sh 131 | i=0 132 | for arg in "$@" ; do 133 | CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -` 134 | CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option 135 | 136 | if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition 137 | eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"` 138 | else 139 | eval `echo args$i`="\"$arg\"" 140 | fi 141 | i=$((i+1)) 142 | done 143 | case $i in 144 | (0) set -- ;; 145 | (1) set -- "$args0" ;; 146 | (2) set -- "$args0" "$args1" ;; 147 | (3) set -- "$args0" "$args1" "$args2" ;; 148 | (4) set -- "$args0" "$args1" "$args2" "$args3" ;; 149 | (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;; 150 | (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;; 151 | (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;; 152 | (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;; 153 | (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;; 154 | esac 155 | fi 156 | 157 | # Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules 158 | function splitJvmOpts() { 159 | JVM_OPTS=("$@") 160 | } 161 | eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS 162 | JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME" 163 | 164 | # by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong 165 | if [[ "$(uname)" == "Darwin" ]] && [[ "$HOME" == "$PWD" ]]; then 166 | cd "$(dirname "$0")" 167 | fi 168 | 169 | exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@" 170 | -------------------------------------------------------------------------------- /gradlew.bat: -------------------------------------------------------------------------------- 1 | @if "%DEBUG%" == "" @echo off 2 | @rem ########################################################################## 3 | @rem 4 | @rem Gradle startup script for Windows 5 | @rem 6 | @rem ########################################################################## 7 | 8 | @rem Set local scope for the variables with windows NT shell 9 | if "%OS%"=="Windows_NT" setlocal 10 | 11 | set DIRNAME=%~dp0 12 | if "%DIRNAME%" == "" set DIRNAME=. 13 | set APP_BASE_NAME=%~n0 14 | set APP_HOME=%DIRNAME% 15 | 16 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 17 | set DEFAULT_JVM_OPTS= 18 | 19 | @rem Find java.exe 20 | if defined JAVA_HOME goto findJavaFromJavaHome 21 | 22 | set JAVA_EXE=java.exe 23 | %JAVA_EXE% -version >NUL 2>&1 24 | if "%ERRORLEVEL%" == "0" goto init 25 | 26 | echo. 27 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 28 | echo. 29 | echo Please set the JAVA_HOME variable in your environment to match the 30 | echo location of your Java installation. 31 | 32 | goto fail 33 | 34 | :findJavaFromJavaHome 35 | set JAVA_HOME=%JAVA_HOME:"=% 36 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe 37 | 38 | if exist "%JAVA_EXE%" goto init 39 | 40 | echo. 41 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 42 | echo. 43 | echo Please set the JAVA_HOME variable in your environment to match the 44 | echo location of your Java installation. 45 | 46 | goto fail 47 | 48 | :init 49 | @rem Get command-line arguments, handling Windows variants 50 | 51 | if not "%OS%" == "Windows_NT" goto win9xME_args 52 | 53 | :win9xME_args 54 | @rem Slurp the command line arguments. 55 | set CMD_LINE_ARGS= 56 | set _SKIP=2 57 | 58 | :win9xME_args_slurp 59 | if "x%~1" == "x" goto execute 60 | 61 | set CMD_LINE_ARGS=%* 62 | 63 | :execute 64 | @rem Setup the command line 65 | 66 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar 67 | 68 | @rem Execute Gradle 69 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS% 70 | 71 | :end 72 | @rem End local scope for the variables with windows NT shell 73 | if "%ERRORLEVEL%"=="0" goto mainEnd 74 | 75 | :fail 76 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of 77 | rem the _cmd.exe /c_ return code! 78 | if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 79 | exit /b 1 80 | 81 | :mainEnd 82 | if "%OS%"=="Windows_NT" endlocal 83 | 84 | :omega 85 | -------------------------------------------------------------------------------- /settings.gradle: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2016 Egor Andreevici 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | rootProject.name = 'kotlin-concurrency-primitives' 18 | 19 | -------------------------------------------------------------------------------- /src/main/java/me/egorand/kotlin/concurrency/SynchronizedExampleJava.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2016 Egor Andreevici 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | package me.egorand.kotlin.concurrency; 18 | 19 | public class SynchronizedExampleJava { 20 | 21 | public synchronized void synchronizedMethod() { 22 | System.out.println("inside a synchronized method: " + Thread.currentThread()); 23 | } 24 | 25 | public void methodWithSynchronizedBlock() { 26 | System.out.println("outside of a synchronized block: " + Thread.currentThread()); 27 | synchronized (this) { 28 | System.out.println("inside a synchronized block: " + Thread.currentThread()); 29 | } 30 | } 31 | 32 | public static void main(String[] args) { 33 | System.out.println("starting: " + Thread.currentThread()); 34 | 35 | final SynchronizedExampleJava example = new SynchronizedExampleJava(); 36 | 37 | new Thread(new Runnable() { 38 | @Override public void run() { 39 | example.synchronizedMethod(); 40 | } 41 | }).start(); 42 | 43 | new Thread(new Runnable() { 44 | @Override public void run() { 45 | example.methodWithSynchronizedBlock(); 46 | } 47 | }).start(); 48 | 49 | System.out.println("finishing: " + Thread.currentThread()); 50 | } 51 | } 52 | -------------------------------------------------------------------------------- /src/main/java/me/egorand/kotlin/concurrency/ThreadCreationExampleJava.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2016 Egor Andreevici 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | package me.egorand.kotlin.concurrency; 18 | 19 | public class ThreadCreationExampleJava { 20 | 21 | public static void main(String[] args) { 22 | System.out.println("starting: " + Thread.currentThread()); 23 | 24 | // subclassing Thread class to create a new thread 25 | new Thread() { 26 | @Override public void run() { 27 | System.out.println("running from Thread: " + Thread.currentThread()); 28 | } 29 | }.start(); 30 | 31 | // passing a Runnable to create a thread 32 | new Thread(new Runnable() { 33 | @Override public void run() { 34 | System.out.println("running from Runnable: " + Thread.currentThread()); 35 | } 36 | }).start(); 37 | 38 | System.out.println("finishing: " + Thread.currentThread()); 39 | } 40 | } 41 | -------------------------------------------------------------------------------- /src/main/java/me/egorand/kotlin/concurrency/VolatileExampleJava.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2016 Egor Andreevici 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | package me.egorand.kotlin.concurrency; 18 | 19 | public class VolatileExampleJava { 20 | 21 | private volatile boolean running; 22 | 23 | public void start() { 24 | running = true; 25 | new Thread(new Runnable() { 26 | @Override public void run() { 27 | while (running) { 28 | System.out.println("Still running: " + Thread.currentThread()); 29 | } 30 | } 31 | }).start(); 32 | } 33 | 34 | public void stop() { 35 | running = false; 36 | System.out.println("Stopped: " + Thread.currentThread()); 37 | } 38 | 39 | public static void main(String[] args) throws Exception { 40 | System.out.println("starting: " + Thread.currentThread()); 41 | 42 | final VolatileExampleJava example = new VolatileExampleJava(); 43 | 44 | example.start(); 45 | 46 | Thread.sleep(100, 100); 47 | 48 | example.stop(); 49 | 50 | System.out.println("finishing: " + Thread.currentThread()); 51 | } 52 | } 53 | -------------------------------------------------------------------------------- /src/main/java/me/egorand/kotlin/concurrency/WaitNotifyExampleJava.java: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2016 Egor Andreevici 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | package me.egorand.kotlin.concurrency; 18 | 19 | import java.util.Random; 20 | 21 | public class WaitNotifyExampleJava { 22 | 23 | private volatile int items; 24 | private final int maxItems; 25 | 26 | private final Random rand; 27 | 28 | public WaitNotifyExampleJava(int maxItems) { 29 | this.maxItems = maxItems; 30 | this.rand = new Random(); 31 | } 32 | 33 | public synchronized void produce() { 34 | try { 35 | while (items >= maxItems) { 36 | wait(); 37 | } 38 | Thread.sleep(rand.nextInt(100)); 39 | items++; 40 | System.out.println("Produced, count is " + items + ": " + Thread.currentThread()); 41 | notifyAll(); 42 | } catch (InterruptedException e) { 43 | // ignore 44 | } 45 | } 46 | 47 | public synchronized void consume() { 48 | try { 49 | while (items <= 0) { 50 | wait(); 51 | } 52 | Thread.sleep(rand.nextInt(100)); 53 | items--; 54 | System.out.println("Consumed, count is " + items + ": " + Thread.currentThread()); 55 | notifyAll(); 56 | } catch (InterruptedException e) { 57 | // ignore 58 | } 59 | } 60 | 61 | public static void main(String[] args) throws Exception { 62 | System.out.println("starting: " + Thread.currentThread()); 63 | 64 | final WaitNotifyExampleJava example = new WaitNotifyExampleJava(5); 65 | 66 | for (int i = 0; i < 15; i++) { 67 | final int index = i; 68 | new Thread(new Runnable() { 69 | @Override public void run() { 70 | if (index < 5) { 71 | example.consume(); 72 | } else { 73 | example.produce(); 74 | } 75 | } 76 | }).start(); 77 | } 78 | 79 | Thread.sleep(1000); 80 | System.out.println("finishing: " + Thread.currentThread()); 81 | } 82 | } 83 | -------------------------------------------------------------------------------- /src/main/kotlin/me/egorand/kotlin/concurrency/SynchronizedExampleKotlin.kt: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2016 Egor Andreevici 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | package me.egorand.kotlin.concurrency 18 | 19 | import kotlin.concurrent.thread 20 | 21 | class SynchronizedExampleKotlin { 22 | 23 | // @Synchronized: https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.jvm/-synchronized/ 24 | @Synchronized fun synchronizedMethod() { 25 | println("inside a synchronized method: ${Thread.currentThread()}") 26 | } 27 | 28 | // synchronized: https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/synchronized.html 29 | fun methodWithSynchronizedBlock() { 30 | println("outside of a synchronized block: ${Thread.currentThread()}") 31 | synchronized(this) { 32 | println("inside a synchronized block: ${Thread.currentThread()}") 33 | } 34 | } 35 | } 36 | 37 | fun main(args: Array) { 38 | println("starting: " + Thread.currentThread()) 39 | 40 | val example = SynchronizedExampleKotlin() 41 | 42 | thread(start = true) { 43 | example.synchronizedMethod() 44 | } 45 | 46 | thread(start = true) { 47 | example.methodWithSynchronizedBlock() 48 | } 49 | 50 | println("finishing: " + Thread.currentThread()) 51 | } -------------------------------------------------------------------------------- /src/main/kotlin/me/egorand/kotlin/concurrency/ThreadCreationExampleKotlin.kt: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2016 Egor Andreevici 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | package me.egorand.kotlin.concurrency 18 | 19 | import kotlin.concurrent.thread 20 | 21 | fun main(args: Array) { 22 | println("starting: " + Thread.currentThread()) 23 | 24 | // subclassing Thread to create a thread 25 | // Object expressions: https://kotlinlang.org/docs/reference/object-declarations.html#object-expressions 26 | object : Thread() { 27 | override fun run() { 28 | println("running from Thread: ${Thread.currentThread()}") 29 | } 30 | }.start() 31 | 32 | // passing a lambda expression to create a thread 33 | // Lambda expressions: https://kotlinlang.org/docs/reference/lambdas.html#lambda-expressions-and-anonymous-functions 34 | Thread({ 35 | println("running from lambda: ${Thread.currentThread()}") 36 | }).start() 37 | 38 | // using thread() function to create a thread 39 | // thread: https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.concurrent/thread.html 40 | thread(start = true) { 41 | println("running from thread(): ${Thread.currentThread()}") 42 | } 43 | 44 | println("finishing: " + Thread.currentThread()) 45 | } -------------------------------------------------------------------------------- /src/main/kotlin/me/egorand/kotlin/concurrency/VolatileExampleKotlin.kt: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2016 Egor Andreevici 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | package me.egorand.kotlin.concurrency 18 | 19 | import kotlin.concurrent.thread 20 | 21 | class VolatileExampleKotlin { 22 | 23 | // @Volatile: https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.jvm/-volatile/index.html 24 | @Volatile private var running = false 25 | 26 | fun start() { 27 | running = true 28 | thread(start = true) { 29 | while (running) { 30 | println("Still running: ${Thread.currentThread()}") 31 | } 32 | } 33 | } 34 | 35 | fun stop() { 36 | running = false 37 | println("Stopped: ${Thread.currentThread()}") 38 | } 39 | } 40 | 41 | fun main(args: Array) { 42 | println("starting: " + Thread.currentThread()) 43 | 44 | val example = VolatileExampleKotlin() 45 | 46 | example.start() 47 | 48 | Thread.sleep(100) 49 | 50 | example.stop() 51 | 52 | println("finishing: " + Thread.currentThread()) 53 | } -------------------------------------------------------------------------------- /src/main/kotlin/me/egorand/kotlin/concurrency/WaitNotifyExampleKotlin.kt: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright 2016 Egor Andreevici 3 | * 4 | * Licensed under the Apache License, Version 2.0 (the "License"); 5 | * you may not use this file except in compliance with the License. 6 | * You may obtain a copy of the License at 7 | * 8 | * http://www.apache.org/licenses/LICENSE-2.0 9 | * 10 | * Unless required by applicable law or agreed to in writing, software 11 | * distributed under the License is distributed on an "AS IS" BASIS, 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | * See the License for the specific language governing permissions and 14 | * limitations under the License. 15 | */ 16 | 17 | package me.egorand.kotlin.concurrency 18 | 19 | import java.util.* 20 | import kotlin.concurrent.thread 21 | 22 | class WaitNotifyExampleKotlin(private val maxItems: Int) { 23 | 24 | @Volatile private var items = 0 25 | private val rand = Random() 26 | 27 | private val lock = java.lang.Object() 28 | 29 | fun produce() = synchronized(lock) { 30 | while (items >= maxItems) { 31 | lock.wait() 32 | } 33 | Thread.sleep(rand.nextInt(100).toLong()) 34 | items++ 35 | println("Produced, count is $items: ${Thread.currentThread()}") 36 | lock.notifyAll() 37 | } 38 | 39 | fun consume() = synchronized(lock) { 40 | while (items <= 0) { 41 | lock.wait() 42 | } 43 | Thread.sleep(rand.nextInt(100).toLong()) 44 | items-- 45 | println("Consumed, count is $items: ${Thread.currentThread()}") 46 | lock.notifyAll() 47 | } 48 | } 49 | 50 | fun main(args: Array) { 51 | println("starting: ${Thread.currentThread()}") 52 | 53 | val example = WaitNotifyExampleKotlin(5) 54 | 55 | for (i in 0..14) { 56 | thread(start = true) { 57 | if (i < 5) { 58 | example.consume() 59 | } else { 60 | example.produce() 61 | } 62 | } 63 | } 64 | 65 | Thread.sleep(1000) 66 | println("finishing: ${Thread.currentThread()}") 67 | } --------------------------------------------------------------------------------