├── .gitignore ├── LICENSE ├── README.md ├── build.gradle ├── gradle.properties ├── gradle └── wrapper │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── gradlew ├── gradlew.bat ├── resources ├── ajax-loader.gif └── logback.xml ├── settings.gradle ├── src ├── contributors │ ├── Contributors.kt │ ├── ContributorsUI.kt │ ├── GitHubService.kt │ ├── Logger.kt │ ├── Params.kt │ └── main.kt ├── samples │ ├── ChannelsSample.kt │ ├── ConcurrencySample.kt │ └── SamplesLogger.kt └── tasks │ ├── Aggregation.kt │ ├── Request1Blocking.kt │ ├── Request2Background.kt │ ├── Request3Callbacks.kt │ ├── Request4Suspend.kt │ ├── Request5Concurrent.kt │ ├── Request5NotCancellable.kt │ ├── Request6Progress.kt │ └── Request7Channels.kt └── test ├── contributors ├── MockGithubService.kt └── testData.kt ├── samples └── SampleTest.kt └── tasks ├── AggregationKtTest.kt ├── Request1BlockingKtTest.kt ├── Request3CallbacksKtTest.kt ├── Request4SuspendKtTest.kt ├── Request5ConcurrentKtTest.kt ├── Request6ProgressKtTest.kt └── Request7ChannelsKtTest.kt /.gitignore: -------------------------------------------------------------------------------- 1 | .gradle 2 | .idea 3 | out 4 | build 5 | *.iml -------------------------------------------------------------------------------- /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 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | [![official JetBrains project](https://jb.gg/badges/official.svg)](https://confluence.jetbrains.com/display/ALL/JetBrains+on+GitHub) 2 | [![GitHub license](https://img.shields.io/badge/license-Apache%20License%202.0-blue.svg?style=flat)](https://www.apache.org/licenses/LICENSE-2.0) 3 | 4 | # Introduction to Coroutines and Channels Hands-On Lab 5 | 6 | This repository is the code corresponding to the 7 | [Introduction to Coroutines and Channels](https://play.kotlinlang.org/hands-on/Introduction%20to%20Coroutines%20and%20Channels/01_Introduction) 8 | Hands-On Lab. 9 | -------------------------------------------------------------------------------- /build.gradle: -------------------------------------------------------------------------------- 1 | plugins { 2 | id 'org.jetbrains.kotlin.jvm' version '1.7.21' 3 | id 'org.jetbrains.kotlin.plugin.serialization' version '1.7.21' 4 | } 5 | 6 | group 'intro-coroutines' 7 | version '1.0-SNAPSHOT' 8 | 9 | repositories { 10 | mavenCentral() 11 | } 12 | 13 | dependencies { 14 | implementation "org.jetbrains.kotlin:kotlin-stdlib" 15 | implementation "org.jetbrains.kotlin:kotlin-reflect" 16 | implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.4.1") 17 | 18 | def coroutines_version = '1.6.4' 19 | implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:$coroutines_version" 20 | implementation "org.jetbrains.kotlinx:kotlinx-coroutines-swing:$coroutines_version" 21 | implementation "org.jetbrains.kotlinx:kotlinx-coroutines-jdk8:$coroutines_version" 22 | implementation "org.jetbrains.kotlinx:kotlinx-coroutines-slf4j:$coroutines_version" 23 | implementation "org.jetbrains.kotlinx:kotlinx-coroutines-debug:$coroutines_version" 24 | 25 | implementation 'ch.qos.logback:logback-classic:1.4.5' 26 | 27 | def retrofit_version = '2.9.0' 28 | implementation "com.squareup.retrofit2:retrofit:$retrofit_version" 29 | implementation "com.squareup.retrofit2:retrofit-mock:$retrofit_version" 30 | implementation "com.jakewharton.retrofit:retrofit2-kotlinx-serialization-converter:0.8.0" 31 | implementation 'com.squareup.okhttp3:okhttp:4.10.0' 32 | 33 | implementation 'io.reactivex.rxjava2:rxjava:2.2.21' 34 | implementation 'io.reactivex.rxjava2:rxkotlin:2.4.0' 35 | implementation "com.squareup.retrofit2:adapter-rxjava2:$retrofit_version" 36 | 37 | testImplementation 'junit:junit:4.13.2' 38 | testImplementation "org.jetbrains.kotlinx:kotlinx-coroutines-test:$coroutines_version" 39 | } 40 | 41 | compileKotlin { 42 | kotlinOptions { 43 | jvmTarget = "1.8" 44 | freeCompilerArgs += "-opt-in=kotlin.RequiresOptIn" 45 | } 46 | } 47 | 48 | compileTestKotlin { 49 | kotlinOptions { 50 | jvmTarget = "1.8" 51 | freeCompilerArgs += "-opt-in=kotlin.RequiresOptIn" 52 | } 53 | } 54 | 55 | sourceSets { 56 | main.kotlin.srcDirs = ['src'] 57 | main.resources.srcDirs = ['resources'] 58 | test.kotlin.srcDirs = ['test'] 59 | } -------------------------------------------------------------------------------- /gradle.properties: -------------------------------------------------------------------------------- 1 | kotlin.code.style=official -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/kotlin-hands-on/intro-coroutines/eee89091c695b3b35993cf6611503ed04a65bcae/gradle/wrapper/gradle-wrapper.jar -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.properties: -------------------------------------------------------------------------------- 1 | #Thu May 30 12:29:46 CEST 2019 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-7.6-all.zip 7 | -------------------------------------------------------------------------------- /gradlew: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env sh 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 | # Escape application args 158 | save () { 159 | for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done 160 | echo " " 161 | } 162 | APP_ARGS=$(save "$@") 163 | 164 | # Collect all arguments for the java command, following the shell quoting and substitution rules 165 | eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS" 166 | 167 | # by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong 168 | if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then 169 | cd "$(dirname "$0")" 170 | fi 171 | 172 | exec "$JAVACMD" "$@" 173 | -------------------------------------------------------------------------------- /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 | -------------------------------------------------------------------------------- /resources/ajax-loader.gif: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/kotlin-hands-on/intro-coroutines/eee89091c695b3b35993cf6611503ed04a65bcae/resources/ajax-loader.gif -------------------------------------------------------------------------------- /resources/logback.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | %r [%thread] %-5level %logger{36} - %msg%n 5 | 6 | 7 | 8 | 9 | 10 | 11 | -------------------------------------------------------------------------------- /settings.gradle: -------------------------------------------------------------------------------- 1 | rootProject.name = 'intro-coroutines' 2 | 3 | -------------------------------------------------------------------------------- /src/contributors/Contributors.kt: -------------------------------------------------------------------------------- 1 | package contributors 2 | 3 | import contributors.Contributors.LoadingStatus.* 4 | import contributors.Variant.* 5 | import kotlinx.coroutines.* 6 | import tasks.* 7 | import java.awt.event.ActionListener 8 | import javax.swing.SwingUtilities 9 | import kotlin.coroutines.CoroutineContext 10 | import kotlin.system.exitProcess 11 | 12 | enum class Variant { 13 | BLOCKING, // Request1Blocking 14 | BACKGROUND, // Request2Background 15 | CALLBACKS, // Request3Callbacks 16 | SUSPEND, // Request4Coroutine 17 | CONCURRENT, // Request5Concurrent 18 | NOT_CANCELLABLE, // Request6NotCancellable 19 | PROGRESS, // Request6Progress 20 | CHANNELS // Request7Channels 21 | } 22 | 23 | interface Contributors: CoroutineScope { 24 | 25 | val job: Job 26 | 27 | override val coroutineContext: CoroutineContext 28 | get() = job + Dispatchers.Main 29 | 30 | fun init() { 31 | // Start a new loading on 'load' click 32 | addLoadListener { 33 | saveParams() 34 | loadContributors() 35 | } 36 | 37 | // Save preferences and exit on closing the window 38 | addOnWindowClosingListener { 39 | job.cancel() 40 | saveParams() 41 | exitProcess(0) 42 | } 43 | 44 | // Load stored params (user & password values) 45 | loadInitialParams() 46 | } 47 | 48 | fun loadContributors() { 49 | val (username, password, org, _) = getParams() 50 | val req = RequestData(username, password, org) 51 | 52 | clearResults() 53 | val service = createGitHubService(req.username, req.password) 54 | 55 | val startTime = System.currentTimeMillis() 56 | when (getSelectedVariant()) { 57 | BLOCKING -> { // Blocking UI thread 58 | val users = loadContributorsBlocking(service, req) 59 | updateResults(users, startTime) 60 | } 61 | BACKGROUND -> { // Blocking a background thread 62 | loadContributorsBackground(service, req) { users -> 63 | SwingUtilities.invokeLater { 64 | updateResults(users, startTime) 65 | } 66 | } 67 | } 68 | CALLBACKS -> { // Using callbacks 69 | loadContributorsCallbacks(service, req) { users -> 70 | SwingUtilities.invokeLater { 71 | updateResults(users, startTime) 72 | } 73 | } 74 | } 75 | SUSPEND -> { // Using coroutines 76 | launch { 77 | val users = loadContributorsSuspend(service, req) 78 | updateResults(users, startTime) 79 | }.setUpCancellation() 80 | } 81 | CONCURRENT -> { // Performing requests concurrently 82 | launch { 83 | val users = loadContributorsConcurrent(service, req) 84 | updateResults(users, startTime) 85 | }.setUpCancellation() 86 | } 87 | NOT_CANCELLABLE -> { // Performing requests in a non-cancellable way 88 | launch { 89 | val users = loadContributorsNotCancellable(service, req) 90 | updateResults(users, startTime) 91 | }.setUpCancellation() 92 | } 93 | PROGRESS -> { // Showing progress 94 | launch(Dispatchers.Default) { 95 | loadContributorsProgress(service, req) { users, completed -> 96 | withContext(Dispatchers.Main) { 97 | updateResults(users, startTime, completed) 98 | } 99 | } 100 | }.setUpCancellation() 101 | } 102 | CHANNELS -> { // Performing requests concurrently and showing progress 103 | launch(Dispatchers.Default) { 104 | loadContributorsChannels(service, req) { users, completed -> 105 | withContext(Dispatchers.Main) { 106 | updateResults(users, startTime, completed) 107 | } 108 | } 109 | }.setUpCancellation() 110 | } 111 | } 112 | } 113 | 114 | private enum class LoadingStatus { COMPLETED, CANCELED, IN_PROGRESS } 115 | 116 | private fun clearResults() { 117 | updateContributors(listOf()) 118 | updateLoadingStatus(IN_PROGRESS) 119 | setActionsStatus(newLoadingEnabled = false) 120 | } 121 | 122 | private fun updateResults( 123 | users: List, 124 | startTime: Long, 125 | completed: Boolean = true 126 | ) { 127 | updateContributors(users) 128 | updateLoadingStatus(if (completed) COMPLETED else IN_PROGRESS, startTime) 129 | if (completed) { 130 | setActionsStatus(newLoadingEnabled = true) 131 | } 132 | } 133 | 134 | private fun updateLoadingStatus( 135 | status: LoadingStatus, 136 | startTime: Long? = null 137 | ) { 138 | val time = if (startTime != null) { 139 | val time = System.currentTimeMillis() - startTime 140 | "${(time / 1000)}.${time % 1000 / 100} sec" 141 | } else "" 142 | 143 | val text = "Loading status: " + 144 | when (status) { 145 | COMPLETED -> "completed in $time" 146 | IN_PROGRESS -> "in progress $time" 147 | CANCELED -> "canceled" 148 | } 149 | setLoadingStatus(text, status == IN_PROGRESS) 150 | } 151 | 152 | private fun Job.setUpCancellation() { 153 | // make active the 'cancel' button 154 | setActionsStatus(newLoadingEnabled = false, cancellationEnabled = true) 155 | 156 | val loadingJob = this 157 | 158 | // cancel the loading job if the 'cancel' button was clicked 159 | val listener = ActionListener { 160 | loadingJob.cancel() 161 | updateLoadingStatus(CANCELED) 162 | } 163 | addCancelListener(listener) 164 | 165 | // update the status and remove the listener after the loading job is completed 166 | launch { 167 | loadingJob.join() 168 | setActionsStatus(newLoadingEnabled = true) 169 | removeCancelListener(listener) 170 | } 171 | } 172 | 173 | fun loadInitialParams() { 174 | setParams(loadStoredParams()) 175 | } 176 | 177 | fun saveParams() { 178 | val params = getParams() 179 | if (params.username.isEmpty() && params.password.isEmpty()) { 180 | removeStoredParams() 181 | } 182 | else { 183 | saveParams(params) 184 | } 185 | } 186 | 187 | fun getSelectedVariant(): Variant 188 | 189 | fun updateContributors(users: List) 190 | 191 | fun setLoadingStatus(text: String, iconRunning: Boolean) 192 | 193 | fun setActionsStatus(newLoadingEnabled: Boolean, cancellationEnabled: Boolean = false) 194 | 195 | fun addCancelListener(listener: ActionListener) 196 | 197 | fun removeCancelListener(listener: ActionListener) 198 | 199 | fun addLoadListener(listener: () -> Unit) 200 | 201 | fun addOnWindowClosingListener(listener: () -> Unit) 202 | 203 | fun setParams(params: Params) 204 | 205 | fun getParams(): Params 206 | } 207 | -------------------------------------------------------------------------------- /src/contributors/ContributorsUI.kt: -------------------------------------------------------------------------------- 1 | package contributors 2 | 3 | import kotlinx.coroutines.Job 4 | import java.awt.Dimension 5 | import java.awt.GridBagConstraints 6 | import java.awt.GridBagLayout 7 | import java.awt.Insets 8 | import java.awt.event.ActionListener 9 | import java.awt.event.WindowAdapter 10 | import java.awt.event.WindowEvent 11 | import javax.swing.* 12 | import javax.swing.table.DefaultTableModel 13 | 14 | private val INSETS = Insets(3, 10, 3, 10) 15 | private val COLUMNS = arrayOf("Login", "Contributions") 16 | 17 | @Suppress("CONFLICTING_INHERITED_JVM_DECLARATIONS") 18 | class ContributorsUI : JFrame("GitHub Contributors"), Contributors { 19 | private val username = JTextField(20) 20 | private val password = JPasswordField(20) 21 | private val org = JTextField(20) 22 | private val variant = JComboBox(Variant.values()) 23 | private val load = JButton("Load contributors") 24 | private val cancel = JButton("Cancel").apply { isEnabled = false } 25 | 26 | private val resultsModel = DefaultTableModel(COLUMNS, 0) 27 | private val results = JTable(resultsModel) 28 | private val resultsScroll = JScrollPane(results).apply { 29 | preferredSize = Dimension(200, 200) 30 | } 31 | 32 | private val loadingIcon = ImageIcon(javaClass.classLoader.getResource("ajax-loader.gif")) 33 | private val loadingStatus = JLabel("Start new loading", loadingIcon, SwingConstants.CENTER) 34 | 35 | override val job = Job() 36 | 37 | init { 38 | // Create UI 39 | rootPane.contentPane = JPanel(GridBagLayout()).apply { 40 | addLabeled("GitHub Username", username) 41 | addLabeled("Password/Token", password) 42 | addWideSeparator() 43 | addLabeled("Organization", org) 44 | addLabeled("Variant", variant) 45 | addWideSeparator() 46 | addWide(JPanel().apply { 47 | add(load) 48 | add(cancel) 49 | }) 50 | addWide(resultsScroll) { 51 | weightx = 1.0 52 | weighty = 1.0 53 | fill = GridBagConstraints.BOTH 54 | } 55 | addWide(loadingStatus) 56 | } 57 | // Initialize actions 58 | init() 59 | } 60 | 61 | override fun getSelectedVariant(): Variant = variant.getItemAt(variant.selectedIndex) 62 | 63 | override fun updateContributors(users: List) { 64 | if (users.isNotEmpty()) { 65 | log.info("Updating result with ${users.size} rows") 66 | } 67 | else { 68 | log.info("Clearing result") 69 | } 70 | resultsModel.setDataVector(users.map { 71 | arrayOf(it.login, it.contributions) 72 | }.toTypedArray(), COLUMNS) 73 | } 74 | 75 | override fun setLoadingStatus(text: String, iconRunning: Boolean) { 76 | loadingStatus.text = text 77 | loadingStatus.icon = if (iconRunning) loadingIcon else null 78 | } 79 | 80 | override fun addCancelListener(listener: ActionListener) { 81 | cancel.addActionListener(listener) 82 | } 83 | 84 | override fun removeCancelListener(listener: ActionListener) { 85 | cancel.removeActionListener(listener) 86 | } 87 | 88 | override fun addLoadListener(listener: () -> Unit) { 89 | load.addActionListener { listener() } 90 | } 91 | 92 | override fun addOnWindowClosingListener(listener: () -> Unit) { 93 | addWindowListener(object : WindowAdapter() { 94 | override fun windowClosing(e: WindowEvent?) { 95 | listener() 96 | } 97 | }) 98 | } 99 | 100 | override fun setActionsStatus(newLoadingEnabled: Boolean, cancellationEnabled: Boolean) { 101 | load.isEnabled = newLoadingEnabled 102 | cancel.isEnabled = cancellationEnabled 103 | } 104 | 105 | override fun setParams(params: Params) { 106 | username.text = params.username 107 | password.text = params.password 108 | org.text = params.org 109 | variant.selectedIndex = params.variant.ordinal 110 | } 111 | 112 | override fun getParams(): Params { 113 | return Params(username.text, password.password.joinToString(""), org.text, getSelectedVariant()) 114 | } 115 | } 116 | 117 | fun JPanel.addLabeled(label: String, component: JComponent) { 118 | add(JLabel(label), GridBagConstraints().apply { 119 | gridx = 0 120 | insets = INSETS 121 | }) 122 | add(component, GridBagConstraints().apply { 123 | gridx = 1 124 | insets = INSETS 125 | anchor = GridBagConstraints.WEST 126 | fill = GridBagConstraints.HORIZONTAL 127 | weightx = 1.0 128 | }) 129 | } 130 | 131 | fun JPanel.addWide(component: JComponent, constraints: GridBagConstraints.() -> Unit = {}) { 132 | add(component, GridBagConstraints().apply { 133 | gridx = 0 134 | gridwidth = 2 135 | insets = INSETS 136 | constraints() 137 | }) 138 | } 139 | 140 | fun JPanel.addWideSeparator() { 141 | addWide(JSeparator()) { 142 | fill = GridBagConstraints.HORIZONTAL 143 | } 144 | } 145 | 146 | fun setDefaultFontSize(size: Float) { 147 | for (key in UIManager.getLookAndFeelDefaults().keys.toTypedArray()) { 148 | if (key.toString().lowercase().contains("font")) { 149 | val font = UIManager.getDefaults().getFont(key) ?: continue 150 | val newFont = font.deriveFont(size) 151 | UIManager.put(key, newFont) 152 | } 153 | } 154 | } -------------------------------------------------------------------------------- /src/contributors/GitHubService.kt: -------------------------------------------------------------------------------- 1 | package contributors 2 | 3 | import com.jakewharton.retrofit2.converter.kotlinx.serialization.asConverterFactory 4 | import kotlinx.serialization.ExperimentalSerializationApi 5 | import kotlinx.serialization.Serializable 6 | import kotlinx.serialization.json.Json 7 | import okhttp3.MediaType.Companion.toMediaType 8 | import okhttp3.OkHttpClient 9 | import retrofit2.Call 10 | import retrofit2.Response 11 | import retrofit2.Retrofit 12 | import retrofit2.adapter.rxjava2.RxJava2CallAdapterFactory 13 | import retrofit2.http.GET 14 | import retrofit2.http.Path 15 | import java.util.Base64 16 | 17 | interface GitHubService { 18 | @GET("orgs/{org}/repos?per_page=100") 19 | fun getOrgReposCall( 20 | @Path("org") org: String 21 | ): Call> 22 | 23 | @GET("repos/{owner}/{repo}/contributors?per_page=100") 24 | fun getRepoContributorsCall( 25 | @Path("owner") owner: String, 26 | @Path("repo") repo: String 27 | ): Call> 28 | } 29 | 30 | @Serializable 31 | data class Repo( 32 | val id: Long, 33 | val name: String 34 | ) 35 | 36 | @Serializable 37 | data class User( 38 | val login: String, 39 | val contributions: Int 40 | ) 41 | 42 | @Serializable 43 | data class RequestData( 44 | val username: String, 45 | val password: String, 46 | val org: String 47 | ) 48 | 49 | @OptIn(ExperimentalSerializationApi::class) 50 | fun createGitHubService(username: String, password: String): GitHubService { 51 | val authToken = "Basic " + Base64.getEncoder().encode("$username:$password".toByteArray()).toString(Charsets.UTF_8) 52 | val httpClient = OkHttpClient.Builder() 53 | .addInterceptor { chain -> 54 | val original = chain.request() 55 | val builder = original.newBuilder() 56 | .header("Accept", "application/vnd.github.v3+json") 57 | .header("Authorization", authToken) 58 | val request = builder.build() 59 | chain.proceed(request) 60 | } 61 | .build() 62 | 63 | val contentType = "application/json".toMediaType() 64 | val retrofit = Retrofit.Builder() 65 | .baseUrl("https://api.github.com") 66 | .addConverterFactory(Json { ignoreUnknownKeys = true }.asConverterFactory(contentType)) 67 | .addCallAdapterFactory(RxJava2CallAdapterFactory.create()) 68 | .client(httpClient) 69 | .build() 70 | return retrofit.create(GitHubService::class.java) 71 | } 72 | -------------------------------------------------------------------------------- /src/contributors/Logger.kt: -------------------------------------------------------------------------------- 1 | package contributors 2 | 3 | import org.slf4j.Logger 4 | import org.slf4j.LoggerFactory 5 | import retrofit2.Response 6 | 7 | val log: Logger = LoggerFactory.getLogger("Contributors") 8 | 9 | fun log(msg: String?) { 10 | log.info(msg) 11 | } 12 | 13 | fun logRepos(req: RequestData, response: Response>) { 14 | val repos = response.body() 15 | if (!response.isSuccessful || repos == null) { 16 | log.error("Failed loading repos for ${req.org} with response: '${response.code()}: ${response.message()}'") 17 | } 18 | else { 19 | log.info("${req.org}: loaded ${repos.size} repos") 20 | } 21 | } 22 | 23 | fun logUsers(repo: Repo, response: Response>) { 24 | val users = response.body() 25 | if (!response.isSuccessful || users == null) { 26 | log.error("Failed loading contributors for ${repo.name} with response '${response.code()}: ${response.message()}'") 27 | } 28 | else { 29 | log.info("${repo.name}: loaded ${users.size} contributors") 30 | } 31 | } -------------------------------------------------------------------------------- /src/contributors/Params.kt: -------------------------------------------------------------------------------- 1 | package contributors 2 | 3 | import java.util.prefs.Preferences 4 | 5 | private fun prefNode(): Preferences = Preferences.userRoot().node("ContributorsUI") 6 | 7 | data class Params(val username: String, val password: String, val org: String, val variant: Variant) 8 | 9 | fun loadStoredParams(): Params { 10 | return prefNode().run { 11 | Params( 12 | get("username", ""), 13 | get("password", ""), 14 | get("org", "kotlin"), 15 | Variant.valueOf(get("variant", Variant.BLOCKING.name)) 16 | ) 17 | } 18 | } 19 | 20 | fun removeStoredParams() { 21 | prefNode().removeNode() 22 | } 23 | 24 | fun saveParams(params: Params) { 25 | prefNode().apply { 26 | put("username", params.username) 27 | put("password", params.password) 28 | put("org", params.org) 29 | put("variant", params.variant.name) 30 | sync() 31 | } 32 | } -------------------------------------------------------------------------------- /src/contributors/main.kt: -------------------------------------------------------------------------------- 1 | package contributors 2 | 3 | fun main() { 4 | setDefaultFontSize(18f) 5 | ContributorsUI().apply { 6 | pack() 7 | setLocationRelativeTo(null) 8 | isVisible = true 9 | } 10 | } -------------------------------------------------------------------------------- /src/samples/ChannelsSample.kt: -------------------------------------------------------------------------------- 1 | package samples 2 | 3 | import kotlinx.coroutines.channels.Channel 4 | import kotlinx.coroutines.* 5 | 6 | fun main() = runBlocking { 7 | val channel = Channel() 8 | launch { 9 | channel.send("A1") 10 | channel.send("A2") 11 | log("A done") 12 | } 13 | launch { 14 | channel.send("B1") 15 | log("B done") 16 | } 17 | launch { 18 | repeat(3) { 19 | val x = channel.receive() 20 | log(x) 21 | } 22 | } 23 | } 24 | -------------------------------------------------------------------------------- /src/samples/ConcurrencySample.kt: -------------------------------------------------------------------------------- 1 | package samples 2 | 3 | import kotlinx.coroutines.* 4 | 5 | fun main() = runBlocking { 6 | val deferred: Deferred = async(Dispatchers.Default) { 7 | loadData() 8 | } 9 | log("waiting...") 10 | log(deferred.await()) 11 | } 12 | 13 | suspend fun loadData(): Int { 14 | log("loading...") 15 | delay(1000L) 16 | log("loaded!") 17 | return 42 18 | } -------------------------------------------------------------------------------- /src/samples/SamplesLogger.kt: -------------------------------------------------------------------------------- 1 | package samples 2 | 3 | import org.slf4j.Logger 4 | import org.slf4j.LoggerFactory 5 | 6 | val log: Logger = LoggerFactory.getLogger("Samples") 7 | 8 | fun log(msg: Any?) { 9 | log.info(msg.toString()) 10 | } 11 | -------------------------------------------------------------------------------- /src/tasks/Aggregation.kt: -------------------------------------------------------------------------------- 1 | package tasks 2 | 3 | import contributors.User 4 | 5 | /* 6 | TODO: Write aggregation code. 7 | 8 | In the initial list each user is present several times, once for each 9 | repository he or she contributed to. 10 | Merge duplications: each user should be present only once in the resulting list 11 | with the total value of contributions for all the repositories. 12 | Users should be sorted in a descending order by their contributions. 13 | 14 | The corresponding test can be found in test/tasks/AggregationKtTest.kt. 15 | You can use 'Navigate | Test' menu action (note the shortcut) to navigate to the test. 16 | */ 17 | fun List.aggregate(): List = 18 | this -------------------------------------------------------------------------------- /src/tasks/Request1Blocking.kt: -------------------------------------------------------------------------------- 1 | package tasks 2 | 3 | import contributors.* 4 | import retrofit2.Response 5 | 6 | fun loadContributorsBlocking(service: GitHubService, req: RequestData) : List { 7 | val repos = service 8 | .getOrgReposCall(req.org) 9 | .execute() // Executes request and blocks the current thread 10 | .also { logRepos(req, it) } 11 | .body() ?: emptyList() 12 | 13 | return repos.flatMap { repo -> 14 | service 15 | .getRepoContributorsCall(req.org, repo.name) 16 | .execute() // Executes request and blocks the current thread 17 | .also { logUsers(repo, it) } 18 | .bodyList() 19 | }.aggregate() 20 | } 21 | 22 | fun Response>.bodyList(): List { 23 | return body() ?: emptyList() 24 | } -------------------------------------------------------------------------------- /src/tasks/Request2Background.kt: -------------------------------------------------------------------------------- 1 | package tasks 2 | 3 | import contributors.GitHubService 4 | import contributors.RequestData 5 | import contributors.User 6 | import kotlin.concurrent.thread 7 | 8 | fun loadContributorsBackground(service: GitHubService, req: RequestData, updateResults: (List) -> Unit) { 9 | thread { 10 | loadContributorsBlocking(service, req) 11 | } 12 | } -------------------------------------------------------------------------------- /src/tasks/Request3Callbacks.kt: -------------------------------------------------------------------------------- 1 | package tasks 2 | 3 | import contributors.* 4 | import retrofit2.Call 5 | import retrofit2.Callback 6 | import retrofit2.Response 7 | import java.util.* 8 | import java.util.concurrent.atomic.AtomicInteger 9 | 10 | fun loadContributorsCallbacks(service: GitHubService, req: RequestData, updateResults: (List) -> Unit) { 11 | service.getOrgReposCall(req.org).onResponse { responseRepos -> 12 | logRepos(req, responseRepos) 13 | val repos = responseRepos.bodyList() 14 | val allUsers = mutableListOf() 15 | for (repo in repos) { 16 | service.getRepoContributorsCall(req.org, repo.name).onResponse { responseUsers -> 17 | logUsers(repo, responseUsers) 18 | val users = responseUsers.bodyList() 19 | allUsers += users 20 | } 21 | } 22 | // TODO: Why this code doesn't work? How to fix that? 23 | updateResults(allUsers.aggregate()) 24 | } 25 | } 26 | 27 | inline fun Call.onResponse(crossinline callback: (Response) -> Unit) { 28 | enqueue(object : Callback { 29 | override fun onResponse(call: Call, response: Response) { 30 | callback(response) 31 | } 32 | 33 | override fun onFailure(call: Call, t: Throwable) { 34 | log.error("Call failed", t) 35 | } 36 | }) 37 | } 38 | -------------------------------------------------------------------------------- /src/tasks/Request4Suspend.kt: -------------------------------------------------------------------------------- 1 | package tasks 2 | 3 | import contributors.* 4 | 5 | suspend fun loadContributorsSuspend(service: GitHubService, req: RequestData): List { 6 | TODO() 7 | } -------------------------------------------------------------------------------- /src/tasks/Request5Concurrent.kt: -------------------------------------------------------------------------------- 1 | package tasks 2 | 3 | import contributors.* 4 | import kotlinx.coroutines.* 5 | 6 | suspend fun loadContributorsConcurrent(service: GitHubService, req: RequestData): List = coroutineScope { 7 | TODO() 8 | } -------------------------------------------------------------------------------- /src/tasks/Request5NotCancellable.kt: -------------------------------------------------------------------------------- 1 | package tasks 2 | 3 | import contributors.* 4 | import kotlinx.coroutines.* 5 | import kotlin.coroutines.coroutineContext 6 | 7 | suspend fun loadContributorsNotCancellable(service: GitHubService, req: RequestData): List { 8 | TODO() 9 | } -------------------------------------------------------------------------------- /src/tasks/Request6Progress.kt: -------------------------------------------------------------------------------- 1 | package tasks 2 | 3 | import contributors.* 4 | 5 | suspend fun loadContributorsProgress( 6 | service: GitHubService, 7 | req: RequestData, 8 | updateResults: suspend (List, completed: Boolean) -> Unit 9 | ) { 10 | TODO() 11 | } 12 | -------------------------------------------------------------------------------- /src/tasks/Request7Channels.kt: -------------------------------------------------------------------------------- 1 | package tasks 2 | 3 | import contributors.* 4 | import kotlinx.coroutines.channels.Channel 5 | import kotlinx.coroutines.coroutineScope 6 | import kotlinx.coroutines.launch 7 | 8 | suspend fun loadContributorsChannels( 9 | service: GitHubService, 10 | req: RequestData, 11 | updateResults: suspend (List, completed: Boolean) -> Unit 12 | ) { 13 | coroutineScope { 14 | TODO() 15 | } 16 | } 17 | -------------------------------------------------------------------------------- /test/contributors/MockGithubService.kt: -------------------------------------------------------------------------------- 1 | package contributors 2 | 3 | import kotlinx.coroutines.delay 4 | import retrofit2.Call 5 | import retrofit2.Response 6 | import retrofit2.mock.Calls 7 | 8 | object MockGithubService : GitHubService { 9 | override fun getOrgReposCall(org: String): Call> { 10 | return Calls.response(repos) 11 | } 12 | 13 | override fun getRepoContributorsCall(owner: String, repo: String): Call> { 14 | return Calls.response(reposMap.getValue(repo).users) 15 | } 16 | 17 | /* 18 | // Uncomment the following implementations after adding these methods to GitHubService: 19 | 20 | override suspend fun getOrgRepos(org: String): Response> { 21 | delay(reposDelay) 22 | return Response.success(repos) 23 | } 24 | 25 | override suspend fun getRepoContributors(owner: String, repo: String): Response> { 26 | val testRepo = reposMap.getValue(repo) 27 | delay(testRepo.delay) 28 | return Response.success(testRepo.users) 29 | } 30 | */ 31 | } -------------------------------------------------------------------------------- /test/contributors/testData.kt: -------------------------------------------------------------------------------- 1 | package contributors 2 | 3 | val testRequestData = RequestData("username", "password", "org") 4 | 5 | data class TestRepo(val name: String, val delay: Long, val users: List) 6 | 7 | data class TestResults(val timeFromStart: Long, val users: List) 8 | 9 | const val reposDelay = 1000L 10 | 11 | val testRepos = listOf( 12 | TestRepo( 13 | "repo-1", 1000, listOf( 14 | User("user-1", 10), 15 | User("user-2", 20) 16 | ) 17 | ), 18 | TestRepo( 19 | "repo-2", 1200, listOf( 20 | User("user-2", 30), 21 | User("user-1", 40) 22 | ) 23 | ), 24 | TestRepo( 25 | "repo-3", 800, listOf( 26 | User("user-2", 50), 27 | User("user-3", 60) 28 | ) 29 | ) 30 | ) 31 | 32 | 33 | val repos = testRepos.mapIndexed { index, testRepo -> Repo(index.toLong(), testRepo.name) } 34 | 35 | val reposMap = testRepos.associateBy { it.name } 36 | 37 | val expectedResults = TestResults( 38 | 4000, // 1000 + (1000 + 1200 + 800) 39 | listOf( 40 | User("user-2", 100), 41 | User("user-3", 60), 42 | User("user-1", 50) 43 | ) 44 | ) 45 | 46 | val expectedConcurrentResults = TestResults( 47 | 2200, // 1000 + max(1000, 1200, 800) 48 | expectedResults.users 49 | ) 50 | 51 | val progressResults = listOf( 52 | TestResults( 53 | 2000, // 1000 + 1000 54 | listOf(User(login = "user-2", contributions = 20), User(login = "user-1", contributions = 10)) 55 | ), 56 | TestResults( 57 | 3200, // 2000 + 1200 58 | listOf(User(login = "user-2", contributions = 50), User(login = "user-1", contributions = 50)) 59 | ), 60 | expectedResults 61 | ) 62 | 63 | val concurrentProgressResults = listOf( 64 | TestResults( 65 | 1800, // 1000 + 800 66 | listOf(User(login = "user-3", contributions = 60), User(login = "user-2", contributions = 50)) 67 | ), 68 | TestResults( 69 | 2000, // 1000 + max(800, 1000) 70 | listOf(User(login = "user-2", contributions = 70), User(login = "user-3", contributions = 60), 71 | User(login = "user-1", contributions = 10)) 72 | ), 73 | expectedConcurrentResults 74 | ) -------------------------------------------------------------------------------- /test/samples/SampleTest.kt: -------------------------------------------------------------------------------- 1 | package samples 2 | 3 | import kotlinx.coroutines.ExperimentalCoroutinesApi 4 | import kotlinx.coroutines.coroutineScope 5 | import kotlinx.coroutines.delay 6 | import kotlinx.coroutines.launch 7 | import kotlinx.coroutines.test.currentTime 8 | import kotlinx.coroutines.test.runTest 9 | import org.junit.Test 10 | 11 | @OptIn(ExperimentalCoroutinesApi::class) 12 | class SampleTest { 13 | @Test 14 | fun testDelayInSuspend() = runTest { 15 | val realStartTime = System.currentTimeMillis() 16 | val virtualStartTime = currentTime 17 | 18 | foo() 19 | 20 | println("${System.currentTimeMillis() - realStartTime} ms") // ~ 6 ms 21 | println("${currentTime - virtualStartTime} ms") // 1000 ms 22 | } 23 | 24 | suspend fun foo() { 25 | delay(1000) // auto-advances without delay 26 | println("foo") // executes eagerly when foo() is called 27 | } 28 | 29 | @Test 30 | fun testDelayInLaunch() = runTest { 31 | val realStartTime = System.currentTimeMillis() 32 | val virtualStartTime = currentTime 33 | 34 | bar() 35 | 36 | println("${System.currentTimeMillis() - realStartTime} ms") // ~ 11 ms 37 | println("${currentTime - virtualStartTime} ms") // 1000 ms 38 | } 39 | 40 | suspend fun bar() = coroutineScope { 41 | launch { 42 | delay(1000) // auto-advances without delay 43 | println("bar") // executes eagerly when bar() is called 44 | } 45 | } 46 | } -------------------------------------------------------------------------------- /test/tasks/AggregationKtTest.kt: -------------------------------------------------------------------------------- 1 | package tasks 2 | 3 | import contributors.User 4 | import org.junit.Assert 5 | import org.junit.Test 6 | 7 | class AggregationKtTest { 8 | @Test 9 | fun testAggregation() { 10 | val actual = listOf( 11 | User("Alice", 1), User("Bob", 3), 12 | User("Alice", 2), User("Bob", 7), 13 | User("Charlie", 3), User("Alice", 5) 14 | ).aggregate() 15 | val expected = listOf( 16 | User("Bob", 10), 17 | User("Alice", 8), 18 | User("Charlie", 3) 19 | ) 20 | Assert.assertEquals("Wrong result for 'aggregation'", expected, actual) 21 | } 22 | } -------------------------------------------------------------------------------- /test/tasks/Request1BlockingKtTest.kt: -------------------------------------------------------------------------------- 1 | package tasks 2 | 3 | import contributors.MockGithubService 4 | import contributors.expectedResults 5 | import contributors.testRequestData 6 | import org.junit.Assert 7 | import org.junit.Test 8 | 9 | class Request1BlockingKtTest { 10 | @Test 11 | fun testAggregation() { 12 | val users = loadContributorsBlocking(MockGithubService, testRequestData) 13 | Assert.assertEquals("List of contributors should be sorted " + 14 | "by the number of contributions in a descending order", 15 | expectedResults.users, users) 16 | } 17 | } -------------------------------------------------------------------------------- /test/tasks/Request3CallbacksKtTest.kt: -------------------------------------------------------------------------------- 1 | package tasks 2 | 3 | import contributors.MockGithubService 4 | import contributors.expectedResults 5 | import contributors.testRequestData 6 | import org.junit.Assert 7 | import org.junit.Test 8 | 9 | class Request3CallbacksKtTest { 10 | @Test 11 | fun testDataIsLoaded() { 12 | loadContributorsCallbacks(MockGithubService, testRequestData) { 13 | Assert.assertEquals( 14 | "Wrong result for 'loadContributorsCallbacks'", 15 | expectedResults.users, it 16 | ) 17 | } 18 | } 19 | } -------------------------------------------------------------------------------- /test/tasks/Request4SuspendKtTest.kt: -------------------------------------------------------------------------------- 1 | package tasks 2 | 3 | import contributors.MockGithubService 4 | import contributors.expectedResults 5 | import contributors.testRequestData 6 | import kotlinx.coroutines.runBlocking 7 | import org.junit.Assert 8 | import org.junit.Test 9 | 10 | class Request4SuspendKtTest { 11 | @Test 12 | fun testSuspend() = runBlocking { 13 | val startTime = System.currentTimeMillis() 14 | val result = loadContributorsSuspend(MockGithubService, testRequestData) 15 | Assert.assertEquals("Wrong result for 'loadContributorsSuspend'", expectedResults.users, result) 16 | val totalTime = System.currentTimeMillis() - startTime 17 | /* 18 | // TODO: uncomment this assertion 19 | Assert.assertEquals( 20 | "The calls run consequently, so the total virtual time should be 4000 ms: " + 21 | "1000 for repos request plus (1000 + 1200 + 800) = 3000 for sequential contributors requests)", 22 | expectedResults.timeFromStart, totalTime 23 | ) 24 | */ 25 | Assert.assertTrue( 26 | "The calls run consequently, so the total time should be around 4000 ms: " + 27 | "1000 for repos request plus (1000 + 1200 + 800) = 3000 for sequential contributors requests)", 28 | totalTime in expectedResults.timeFromStart..(expectedResults.timeFromStart + 500) 29 | ) 30 | } 31 | } -------------------------------------------------------------------------------- /test/tasks/Request5ConcurrentKtTest.kt: -------------------------------------------------------------------------------- 1 | package tasks 2 | 3 | import contributors.MockGithubService 4 | import contributors.expectedConcurrentResults 5 | import contributors.testRequestData 6 | import kotlinx.coroutines.runBlocking 7 | import org.junit.Assert 8 | import org.junit.Test 9 | 10 | class Request5ConcurrentKtTest { 11 | @Test 12 | fun testConcurrent() = runBlocking { 13 | val startTime = System.currentTimeMillis() 14 | val result = loadContributorsConcurrent(MockGithubService, testRequestData) 15 | Assert.assertEquals("Wrong result for 'loadContributorsConcurrent'", expectedConcurrentResults.users, result) 16 | val totalTime = System.currentTimeMillis() - startTime 17 | /* 18 | // TODO: uncomment this assertion 19 | Assert.assertEquals( 20 | "The calls run concurrently, so the total virtual time should be 2200 ms: " + 21 | "1000 ms for repos request plus max(1000, 1200, 800) = 1200 ms for concurrent contributors requests)", 22 | expectedConcurrentResults.timeFromStart, totalTime 23 | ) 24 | */ 25 | Assert.assertTrue( 26 | "The calls run concurrently, so the total virtual time should be 2200 ms: " + 27 | "1000 ms for repos request plus max(1000, 1200, 800) = 1200 ms for concurrent contributors requests)", 28 | totalTime in expectedConcurrentResults.timeFromStart..(expectedConcurrentResults.timeFromStart + 500) 29 | ) 30 | } 31 | } -------------------------------------------------------------------------------- /test/tasks/Request6ProgressKtTest.kt: -------------------------------------------------------------------------------- 1 | package tasks 2 | 3 | import contributors.MockGithubService 4 | import contributors.progressResults 5 | import contributors.testRequestData 6 | import kotlinx.coroutines.runBlocking 7 | import org.junit.Assert 8 | import org.junit.Test 9 | 10 | class Request6ProgressKtTest { 11 | @Test 12 | fun testProgress() = runBlocking { 13 | val startTime = System.currentTimeMillis() 14 | var index = 0 15 | loadContributorsProgress(MockGithubService, testRequestData) { 16 | users, _ -> 17 | val expected = progressResults[index++] 18 | val time = System.currentTimeMillis() - startTime 19 | /* 20 | // TODO: uncomment this assertion 21 | Assert.assertEquals("Expected intermediate result after virtual ${expected.timeFromStart} ms:", 22 | expected.timeFromStart, time) 23 | */ 24 | Assert.assertEquals("Wrong intermediate result after $time:", expected.users, users) 25 | } 26 | } 27 | } -------------------------------------------------------------------------------- /test/tasks/Request7ChannelsKtTest.kt: -------------------------------------------------------------------------------- 1 | package tasks 2 | 3 | import contributors.MockGithubService 4 | import contributors.concurrentProgressResults 5 | import contributors.testRequestData 6 | import kotlinx.coroutines.runBlocking 7 | import org.junit.Assert 8 | import org.junit.Test 9 | 10 | class Request7ChannelsKtTest { 11 | @Test 12 | fun testChannels() = runBlocking { 13 | val startTime = System.currentTimeMillis() 14 | var index = 0 15 | loadContributorsChannels(MockGithubService, testRequestData) { 16 | users, _ -> 17 | val expected = concurrentProgressResults[index++] 18 | val time = System.currentTimeMillis() - startTime 19 | /* 20 | // TODO: uncomment this assertion 21 | Assert.assertEquals("Expected intermediate result after virtual ${expected.timeFromStart} ms:", 22 | expected.timeFromStart, time) 23 | */ 24 | Assert.assertEquals("Wrong intermediate result after $time:", expected.users, users) 25 | } 26 | } 27 | } 28 | --------------------------------------------------------------------------------