├── .github └── dependabot.yml ├── .gitignore ├── README.md ├── build.gradle ├── gradle └── wrapper │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── gradlew ├── gradlew.bat ├── settings.gradle └── src ├── main └── java │ ├── astro │ ├── AstroClient.java │ └── json │ │ ├── Assignment.java │ │ └── AstroResponse.java │ └── module-info.java └── test └── java └── astro └── AstroClientTest.java /.github/dependabot.yml: -------------------------------------------------------------------------------- 1 | version: 2 2 | updates: 3 | - package-ecosystem: gradle 4 | directory: "/" 5 | schedule: 6 | interval: daily 7 | time: "10:00" 8 | open-pull-requests-limit: 10 9 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | build 2 | bin 3 | classes 4 | .idea 5 | .gradle 6 | .project 7 | .classpath 8 | .settings 9 | out 10 | *.iml 11 | *.ipr 12 | *.iws 13 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # http-client-demo 2 | Use Java 11 HTTP client to parse astro data 3 | 4 | Data comes from Open-Notify, http://open-notify.org/Open-Notify-API/People-In-Space/ 5 | 6 | Uses JUnit 5, Java 11's HTTP Client (both sync and async), and Gson. 7 | 8 | (Note: Java 11 is OpenJDK 11 EA 28) 9 | -------------------------------------------------------------------------------- /build.gradle: -------------------------------------------------------------------------------- 1 | plugins { 2 | id 'java' 3 | } 4 | 5 | group 'kousenit.com' 6 | version '1.0' 7 | 8 | sourceCompatibility = 11 9 | 10 | repositories { 11 | jcenter() 12 | } 13 | 14 | dependencies { 15 | implementation 'com.google.code.gson:gson:2.13.0' 16 | 17 | testImplementation 'org.junit.jupiter:junit-jupiter:5.13.1' 18 | } 19 | 20 | test { 21 | useJUnitPlatform() 22 | } 23 | 24 | compileJava { 25 | doFirst { 26 | options.compilerArgs = [ 27 | '--module-path', classpath.asPath, 28 | ] 29 | classpath = files() 30 | } 31 | } 32 | -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/kousen/http-client-demo/6c8f697f8cfb3a998ee7f64c938c9f4a43971c48/gradle/wrapper/gradle-wrapper.jar -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.properties: -------------------------------------------------------------------------------- 1 | distributionBase=GRADLE_USER_HOME 2 | distributionPath=wrapper/dists 3 | distributionUrl=https\://services.gradle.org/distributions/gradle-5.2.1-all.zip 4 | zipStoreBase=GRADLE_USER_HOME 5 | zipStorePath=wrapper/dists 6 | -------------------------------------------------------------------------------- /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 "$0"` 29 | 30 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 31 | DEFAULT_JVM_OPTS='"-Xmx64m"' 32 | 33 | # Use the maximum available, or set MAX_FD != -1 to use that value. 34 | MAX_FD="maximum" 35 | 36 | warn () { 37 | echo "$*" 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="-Xmx64m" 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 | rootProject.name = 'http-client-demo' 2 | 3 | -------------------------------------------------------------------------------- /src/main/java/astro/AstroClient.java: -------------------------------------------------------------------------------- 1 | package astro; 2 | 3 | import astro.json.AstroResponse; 4 | import com.google.gson.Gson; 5 | 6 | import java.io.IOException; 7 | import java.net.URI; 8 | import java.net.http.HttpClient; 9 | import java.net.http.HttpRequest; 10 | import java.net.http.HttpResponse; 11 | import java.time.Duration; 12 | import java.util.concurrent.ExecutionException; 13 | 14 | public class AstroClient { 15 | private HttpClient client = HttpClient.newBuilder() 16 | .version(HttpClient.Version.HTTP_2) 17 | .connectTimeout(Duration.ofSeconds(2)) 18 | .build(); 19 | 20 | private Gson gson = new Gson(); 21 | 22 | private HttpRequest buildRequest() { 23 | String astroUrl = "http://api.open-notify.org/astros.json"; 24 | return HttpRequest.newBuilder() 25 | .uri(URI.create(astroUrl)) 26 | .GET() 27 | .build(); 28 | } 29 | 30 | public AstroResponse getSync() throws IOException, InterruptedException { 31 | HttpResponse response = client.send( 32 | buildRequest(), 33 | HttpResponse.BodyHandlers.ofString()); 34 | return getResponse(response.body()); 35 | } 36 | 37 | 38 | public AstroResponse getAsync() throws ExecutionException, InterruptedException { 39 | String json = client.sendAsync(buildRequest(), 40 | HttpResponse.BodyHandlers.ofString()) 41 | .thenApply(HttpResponse::body) 42 | .get(); 43 | return getResponse(json); 44 | } 45 | 46 | 47 | private AstroResponse getResponse(String json) { 48 | return gson.fromJson(json, AstroResponse.class); 49 | } 50 | } 51 | -------------------------------------------------------------------------------- /src/main/java/astro/json/Assignment.java: -------------------------------------------------------------------------------- 1 | package astro.json; 2 | 3 | public class Assignment { 4 | private String name; 5 | private String craft; 6 | 7 | public String getName() { 8 | return name; 9 | } 10 | 11 | public void setName(String name) { 12 | this.name = name; 13 | } 14 | 15 | public String getCraft() { 16 | return craft; 17 | } 18 | 19 | public void setCraft(String craft) { 20 | this.craft = craft; 21 | } 22 | } 23 | -------------------------------------------------------------------------------- /src/main/java/astro/json/AstroResponse.java: -------------------------------------------------------------------------------- 1 | package astro.json; 2 | 3 | import java.util.List; 4 | 5 | public class AstroResponse { 6 | private String message; 7 | private Integer number; 8 | private List people; 9 | 10 | public String getMessage() { 11 | return message; 12 | } 13 | 14 | public void setMessage(String message) { 15 | this.message = message; 16 | } 17 | 18 | public Integer getNumber() { 19 | return number; 20 | } 21 | 22 | public void setNumber(Integer number) { 23 | this.number = number; 24 | } 25 | 26 | public List getPeople() { 27 | return people; 28 | } 29 | 30 | public void setPeople(List people) { 31 | this.people = people; 32 | } 33 | } 34 | -------------------------------------------------------------------------------- /src/main/java/module-info.java: -------------------------------------------------------------------------------- 1 | module http.client.demo.main { 2 | requires java.net.http; 3 | requires gson; 4 | } -------------------------------------------------------------------------------- /src/test/java/astro/AstroClientTest.java: -------------------------------------------------------------------------------- 1 | package astro; 2 | 3 | import astro.json.Assignment; 4 | import astro.json.AstroResponse; 5 | import org.junit.jupiter.api.Test; 6 | 7 | import java.time.Duration; 8 | import java.util.List; 9 | import java.util.logging.Logger; 10 | 11 | import static org.junit.jupiter.api.Assertions.*; 12 | 13 | class AstroClientTest { 14 | private Logger logger = Logger.getLogger(AstroClientTest.class.getName()); 15 | 16 | private AstroClient client = new AstroClient(); 17 | 18 | @Test 19 | void getSync() { 20 | AstroResponse response = assertTimeoutPreemptively( 21 | Duration.ofSeconds(2), 22 | () -> client.getSync()); 23 | 24 | int num = response.getNumber(); 25 | List assignments = response.getPeople(); 26 | 27 | assertEquals("success", response.getMessage()); 28 | assertEquals(num, assignments.size()); 29 | assignments.forEach(assignment -> 30 | assertAll(() -> assertTrue(assignment.getName().length() > 0), 31 | () -> assertTrue(assignment.getCraft().length() > 0))); 32 | 33 | logResponse(num, assignments); 34 | } 35 | 36 | @Test 37 | void getAsync() { 38 | AstroResponse response = assertTimeoutPreemptively( 39 | Duration.ofSeconds(2), 40 | () -> client.getAsync()); 41 | 42 | int num = response.getNumber(); 43 | List assignments = response.getPeople(); 44 | 45 | assertEquals("success", response.getMessage()); 46 | assertEquals(num, assignments.size()); 47 | 48 | logResponse(num, assignments); 49 | } 50 | 51 | private void logResponse(int num, List assignments) { 52 | logger.info(String.format("There are %d people in space", num)); 53 | assignments.forEach(person -> logger.info( 54 | () -> String.format("%s aboard %s", 55 | person.getName(), 56 | person.getCraft()))); 57 | } 58 | } --------------------------------------------------------------------------------