Added project for Apache pulsar examples
This commit is contained in:
Syed Mansoor
parent
44a3d36bd9
commit
3596d3dc34
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@ -0,0 +1,8 @@
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.classpath
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.project
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.settings
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target
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.idea
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*.iml
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.gradle/
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build/
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apply plugin: 'java'
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ext{
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pulsarVersion = '2.1.1-incubating'
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}
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repositories {
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jcenter()
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mavenCentral()
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mavenLocal()
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}
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sourceCompatibility = 1.8
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targetCompatibility = 1.8
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group = 'com.baeldung.pulsar'
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archivesBaseName = 'pulsar-java-example'
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version = '0.0.1'
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dependencies {
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compile group: 'org.apache.pulsar', name: 'pulsar-client', version: pulsarVersion
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}
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Binary file not shown.
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distributionBase=GRADLE_USER_HOME
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distributionPath=wrapper/dists
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distributionUrl=https\://services.gradle.org/distributions/gradle-4.7-bin.zip
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zipStoreBase=GRADLE_USER_HOME
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zipStorePath=wrapper/dists
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#!/usr/bin/env sh
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##############################################################################
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##
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## Gradle start up script for UN*X
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##
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##############################################################################
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# Attempt to set APP_HOME
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# Resolve links: $0 may be a link
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PRG="$0"
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# Need this for relative symlinks.
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while [ -h "$PRG" ] ; do
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ls=`ls -ld "$PRG"`
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link=`expr "$ls" : '.*-> \(.*\)$'`
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if expr "$link" : '/.*' > /dev/null; then
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PRG="$link"
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else
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PRG=`dirname "$PRG"`"/$link"
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fi
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done
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SAVED="`pwd`"
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cd "`dirname \"$PRG\"`/" >/dev/null
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APP_HOME="`pwd -P`"
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cd "$SAVED" >/dev/null
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APP_NAME="Gradle"
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APP_BASE_NAME=`basename "$0"`
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# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
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DEFAULT_JVM_OPTS=""
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# Use the maximum available, or set MAX_FD != -1 to use that value.
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MAX_FD="maximum"
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warn () {
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echo "$*"
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}
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die () {
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echo
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echo "$*"
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echo
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exit 1
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}
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# OS specific support (must be 'true' or 'false').
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cygwin=false
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msys=false
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darwin=false
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nonstop=false
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case "`uname`" in
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CYGWIN* )
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cygwin=true
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;;
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Darwin* )
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darwin=true
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;;
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MINGW* )
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msys=true
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;;
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NONSTOP* )
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nonstop=true
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;;
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esac
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CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
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# Determine the Java command to use to start the JVM.
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if [ -n "$JAVA_HOME" ] ; then
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if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
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# IBM's JDK on AIX uses strange locations for the executables
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JAVACMD="$JAVA_HOME/jre/sh/java"
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else
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JAVACMD="$JAVA_HOME/bin/java"
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fi
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if [ ! -x "$JAVACMD" ] ; then
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die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
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Please set the JAVA_HOME variable in your environment to match the
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location of your Java installation."
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fi
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else
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JAVACMD="java"
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which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
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Please set the JAVA_HOME variable in your environment to match the
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location of your Java installation."
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fi
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# Increase the maximum file descriptors if we can.
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if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
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MAX_FD_LIMIT=`ulimit -H -n`
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if [ $? -eq 0 ] ; then
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if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
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MAX_FD="$MAX_FD_LIMIT"
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fi
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ulimit -n $MAX_FD
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if [ $? -ne 0 ] ; then
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warn "Could not set maximum file descriptor limit: $MAX_FD"
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fi
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else
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warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
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fi
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fi
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# For Darwin, add options to specify how the application appears in the dock
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if $darwin; then
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GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
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fi
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# For Cygwin, switch paths to Windows format before running java
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if $cygwin ; then
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APP_HOME=`cygpath --path --mixed "$APP_HOME"`
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CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
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JAVACMD=`cygpath --unix "$JAVACMD"`
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# We build the pattern for arguments to be converted via cygpath
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ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
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SEP=""
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for dir in $ROOTDIRSRAW ; do
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ROOTDIRS="$ROOTDIRS$SEP$dir"
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SEP="|"
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done
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OURCYGPATTERN="(^($ROOTDIRS))"
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# Add a user-defined pattern to the cygpath arguments
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if [ "$GRADLE_CYGPATTERN" != "" ] ; then
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OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
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fi
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# Now convert the arguments - kludge to limit ourselves to /bin/sh
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i=0
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for arg in "$@" ; do
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CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
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CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option
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if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition
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eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
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else
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eval `echo args$i`="\"$arg\""
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fi
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i=$((i+1))
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done
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case $i in
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(0) set -- ;;
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(1) set -- "$args0" ;;
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(2) set -- "$args0" "$args1" ;;
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(3) set -- "$args0" "$args1" "$args2" ;;
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(4) set -- "$args0" "$args1" "$args2" "$args3" ;;
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(5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
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(6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
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(7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
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(8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
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(9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
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esac
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fi
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# Escape application args
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save () {
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for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
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echo " "
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}
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APP_ARGS=$(save "$@")
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# Collect all arguments for the java command, following the shell quoting and substitution rules
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eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
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# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
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if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
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cd "$(dirname "$0")"
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fi
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exec "$JAVACMD" "$@"
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@ -0,0 +1,84 @@
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@if "%DEBUG%" == "" @echo off
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@rem ##########################################################################
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@rem
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@rem Gradle startup script for Windows
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@rem
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@rem ##########################################################################
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@rem Set local scope for the variables with windows NT shell
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if "%OS%"=="Windows_NT" setlocal
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set DIRNAME=%~dp0
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if "%DIRNAME%" == "" set DIRNAME=.
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set APP_BASE_NAME=%~n0
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set APP_HOME=%DIRNAME%
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@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
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set DEFAULT_JVM_OPTS=
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@rem Find java.exe
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if defined JAVA_HOME goto findJavaFromJavaHome
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set JAVA_EXE=java.exe
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%JAVA_EXE% -version >NUL 2>&1
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if "%ERRORLEVEL%" == "0" goto init
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echo.
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echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
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echo.
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echo Please set the JAVA_HOME variable in your environment to match the
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echo location of your Java installation.
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goto fail
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:findJavaFromJavaHome
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set JAVA_HOME=%JAVA_HOME:"=%
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set JAVA_EXE=%JAVA_HOME%/bin/java.exe
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if exist "%JAVA_EXE%" goto init
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echo.
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echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
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echo.
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echo Please set the JAVA_HOME variable in your environment to match the
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echo location of your Java installation.
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goto fail
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:init
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@rem Get command-line arguments, handling Windows variants
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if not "%OS%" == "Windows_NT" goto win9xME_args
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:win9xME_args
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@rem Slurp the command line arguments.
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set CMD_LINE_ARGS=
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set _SKIP=2
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:win9xME_args_slurp
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if "x%~1" == "x" goto execute
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set CMD_LINE_ARGS=%*
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:execute
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@rem Setup the command line
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set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
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@rem Execute Gradle
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"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
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:end
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@rem End local scope for the variables with windows NT shell
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if "%ERRORLEVEL%"=="0" goto mainEnd
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:fail
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||||||
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rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
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rem the _cmd.exe /c_ return code!
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if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
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exit /b 1
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:mainEnd
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if "%OS%"=="Windows_NT" endlocal
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:omega
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@ -0,0 +1,48 @@
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package com.baeldung;
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import java.io.IOException;
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import org.apache.pulsar.client.api.Consumer;
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import org.apache.pulsar.client.api.Message;
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import org.apache.pulsar.client.api.PulsarClient;
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import org.apache.pulsar.client.api.SubscriptionType;
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public class ConsumerTest {
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private static final String SERVICE_URL = "pulsar://localhost:6650";
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private static final String TOPIC_NAME = "test-topic";
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private static final String SUBSCRIPTION_NAME = "test-subscription";
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public static void main(String[] args) throws IOException {
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// Create a Pulsar client instance. A single instance can be shared across many
|
||||||
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// producers and consumer within the same application
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PulsarClient client = PulsarClient.builder()
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.serviceUrl(SERVICE_URL)
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.build();
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//Configure consumer specific settings.
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Consumer<byte[]> consumer = client.newConsumer()
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.topic(TOPIC_NAME)
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// Allow multiple consumers to attach to the same subscription
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// and get messages dispatched as a queue
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.subscriptionType(SubscriptionType.Shared)
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.subscriptionName(SUBSCRIPTION_NAME)
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.subscribe();
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||||||
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// Once the consumer is created, it can be used for the entire application lifecycle
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System.out.println("Created consumer for the topic "+ TOPIC_NAME);
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do {
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// Wait until a message is available
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||||||
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Message<byte[]> msg = consumer.receive();
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||||||
|
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||||||
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// Extract the message as a printable string and then log
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String content = new String(msg.getData());
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||||||
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System.out.println("Received message '"+content+"' with ID "+msg.getMessageId());
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||||||
|
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||||||
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// Acknowledge processing of the message so that it can be deleted
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||||||
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consumer.acknowledge(msg);
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||||||
|
} while (true);
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||||||
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}
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||||||
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}
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@ -0,0 +1,58 @@
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package com.baeldung;
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import org.apache.pulsar.client.api.CompressionType;
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import org.apache.pulsar.client.api.Message;
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import org.apache.pulsar.client.api.MessageBuilder;
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import org.apache.pulsar.client.api.MessageId;
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import org.apache.pulsar.client.api.Producer;
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import org.apache.pulsar.client.api.PulsarClient;
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import org.apache.pulsar.client.api.PulsarClientException;
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||||||
|
|
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import java.io.IOException;
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||||||
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import java.util.stream.IntStream;
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||||||
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|
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public class ProducerTest {
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||||||
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|
||||||
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private static final String SERVICE_URL = "pulsar://localhost:6650";
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private static final String TOPIC_NAME = "test-topic";
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||||||
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|
||||||
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public static void main(String[] args) throws IOException {
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||||||
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// Create a Pulsar client instance. A single instance can be shared across many
|
||||||
|
// producers and consumer within the same application
|
||||||
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PulsarClient client = PulsarClient.builder()
|
||||||
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.serviceUrl(SERVICE_URL)
|
||||||
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.build();
|
||||||
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|
||||||
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// Configure producer specific settings
|
||||||
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Producer<byte[]> producer = client.newProducer()
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||||||
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// Set the topic
|
||||||
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.topic(TOPIC_NAME)
|
||||||
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// Enable compression
|
||||||
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.compressionType(CompressionType.LZ4)
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||||||
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.create();
|
||||||
|
|
||||||
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// Once the producer is created, it can be used for the entire application life-cycle
|
||||||
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System.out.println("Created producer for the topic "+TOPIC_NAME);
|
||||||
|
|
||||||
|
// Send 5 test messages
|
||||||
|
IntStream.range(1, 5).forEach(i -> {
|
||||||
|
String content = String.format("hi-pulsar-%d", i);
|
||||||
|
|
||||||
|
// Build a message object
|
||||||
|
Message<byte[]> msg = MessageBuilder.create()
|
||||||
|
.setContent(content.getBytes())
|
||||||
|
.build();
|
||||||
|
|
||||||
|
// Send each message and log message content and ID when successfully received
|
||||||
|
try {
|
||||||
|
MessageId msgId = producer.send(msg);
|
||||||
|
|
||||||
|
System.out.println("Published message '"+content+"' with the ID "+msgId);
|
||||||
|
} catch (PulsarClientException e) {
|
||||||
|
System.out.println(e.getMessage());
|
||||||
|
}
|
||||||
|
});
|
||||||
|
|
||||||
|
client.close();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
@ -0,0 +1,59 @@
|
||||||
|
package com.baeldung.subscriptions;
|
||||||
|
|
||||||
|
import org.apache.pulsar.client.api.ConsumerBuilder;
|
||||||
|
import org.apache.pulsar.client.api.Message;
|
||||||
|
import org.apache.pulsar.client.api.MessageBuilder;
|
||||||
|
import org.apache.pulsar.client.api.Producer;
|
||||||
|
import org.apache.pulsar.client.api.PulsarClient;
|
||||||
|
import org.apache.pulsar.client.api.PulsarClientException;
|
||||||
|
import org.apache.pulsar.client.api.SubscriptionType;
|
||||||
|
|
||||||
|
import java.util.stream.IntStream;
|
||||||
|
|
||||||
|
public class ExclusiveSubscriptionTutorial {
|
||||||
|
private static final String SERVICE_URL = "pulsar://localhost:6650";
|
||||||
|
private static final String TOPIC_NAME = "test-topic";
|
||||||
|
private static final String SUBSCRIPTION_NAME = "test-subscription";
|
||||||
|
private static final SubscriptionType SUBSCRIPTION_TYPE = SubscriptionType.Exclusive;
|
||||||
|
|
||||||
|
public static void main(String[] args) throws PulsarClientException {
|
||||||
|
PulsarClient client = PulsarClient.builder()
|
||||||
|
.serviceUrl(SERVICE_URL)
|
||||||
|
.build();
|
||||||
|
|
||||||
|
Producer<byte[]> producer = client.newProducer()
|
||||||
|
.topic(TOPIC_NAME)
|
||||||
|
.create();
|
||||||
|
|
||||||
|
ConsumerBuilder<byte[]> consumer1 = client.newConsumer()
|
||||||
|
.topic(TOPIC_NAME)
|
||||||
|
.subscriptionName(SUBSCRIPTION_NAME)
|
||||||
|
.subscriptionType(SUBSCRIPTION_TYPE);
|
||||||
|
|
||||||
|
ConsumerBuilder<byte[]> consumer2 = client.newConsumer()
|
||||||
|
.topic(TOPIC_NAME)
|
||||||
|
.subscriptionName(SUBSCRIPTION_NAME)
|
||||||
|
.subscriptionType(SUBSCRIPTION_TYPE);
|
||||||
|
|
||||||
|
IntStream.range(0, 999).forEach(i -> {
|
||||||
|
Message<byte[]> msg = MessageBuilder.create()
|
||||||
|
.setContent(String.format("message-%d", i).getBytes())
|
||||||
|
.build();
|
||||||
|
try {
|
||||||
|
producer.send(msg);
|
||||||
|
} catch (PulsarClientException e) {
|
||||||
|
System.out.println(e.getMessage());
|
||||||
|
}
|
||||||
|
});
|
||||||
|
|
||||||
|
// Consumer 1 can subscribe to the topic
|
||||||
|
consumer1.subscribe();
|
||||||
|
|
||||||
|
// Consumer 2 cannot due to the exclusive subscription held by consumer 1
|
||||||
|
consumer2.subscribeAsync()
|
||||||
|
.handle((consumer, exception) -> {
|
||||||
|
System.out.println(exception.getMessage());
|
||||||
|
return null;
|
||||||
|
});
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
@ -0,0 +1,76 @@
|
||||||
|
package com.baeldung.subscriptions;
|
||||||
|
|
||||||
|
import org.apache.pulsar.client.api.Consumer;
|
||||||
|
import org.apache.pulsar.client.api.ConsumerBuilder;
|
||||||
|
import org.apache.pulsar.client.api.Message;
|
||||||
|
import org.apache.pulsar.client.api.MessageBuilder;
|
||||||
|
import org.apache.pulsar.client.api.Producer;
|
||||||
|
import org.apache.pulsar.client.api.PulsarClient;
|
||||||
|
import org.apache.pulsar.client.api.PulsarClientException;
|
||||||
|
import org.apache.pulsar.client.api.SubscriptionType;
|
||||||
|
|
||||||
|
import java.util.stream.IntStream;
|
||||||
|
|
||||||
|
public class FailoverSubscriptionTutorial {
|
||||||
|
private static final String SERVICE_URL = "pulsar://localhost:6650";
|
||||||
|
private static final String TOPIC_NAME = "failover-subscription-test-topic";
|
||||||
|
private static final String SUBSCRIPTION_NAME = "test-subscription";
|
||||||
|
private static final SubscriptionType SUBSCRIPTION_TYPE = SubscriptionType.Failover;
|
||||||
|
private static final int NUM_MSGS = 10;
|
||||||
|
|
||||||
|
public static void main(String[] args) throws PulsarClientException {
|
||||||
|
PulsarClient client = PulsarClient.builder()
|
||||||
|
.serviceUrl(SERVICE_URL)
|
||||||
|
.build();
|
||||||
|
|
||||||
|
Producer<byte[]> producer = client.newProducer()
|
||||||
|
.topic(TOPIC_NAME)
|
||||||
|
.create();
|
||||||
|
|
||||||
|
ConsumerBuilder<byte[]> consumerBuilder = client.newConsumer()
|
||||||
|
.topic(TOPIC_NAME)
|
||||||
|
.subscriptionName(SUBSCRIPTION_NAME)
|
||||||
|
.subscriptionType(SUBSCRIPTION_TYPE);
|
||||||
|
|
||||||
|
Consumer<byte[]> mainConsumer = consumerBuilder
|
||||||
|
.consumerName("consumer-a")
|
||||||
|
.messageListener((consumer, msg) -> {
|
||||||
|
System.out.println("Message received by main consumer");
|
||||||
|
|
||||||
|
try {
|
||||||
|
consumer.acknowledge(msg);
|
||||||
|
} catch (PulsarClientException e) {
|
||||||
|
System.out.println(e.getMessage());
|
||||||
|
}
|
||||||
|
})
|
||||||
|
.subscribe();
|
||||||
|
|
||||||
|
Consumer<byte[]> failoverConsumer = consumerBuilder
|
||||||
|
.consumerName("consumer-b")
|
||||||
|
.messageListener((consumer, msg) -> {
|
||||||
|
System.out.println("Message received by failover consumer");
|
||||||
|
|
||||||
|
try {
|
||||||
|
consumer.acknowledge(msg);
|
||||||
|
} catch (PulsarClientException e) {
|
||||||
|
System.out.println(e.getMessage());
|
||||||
|
}
|
||||||
|
})
|
||||||
|
.subscribe();
|
||||||
|
|
||||||
|
IntStream.range(0, NUM_MSGS).forEach(i -> {
|
||||||
|
Message<byte[]> msg = MessageBuilder.create()
|
||||||
|
.setContent(String.format("message-%d", i).getBytes())
|
||||||
|
.build();
|
||||||
|
try {
|
||||||
|
producer.send(msg);
|
||||||
|
|
||||||
|
Thread.sleep(100);
|
||||||
|
|
||||||
|
if (i > 5) mainConsumer.close();
|
||||||
|
} catch (InterruptedException | PulsarClientException e) {
|
||||||
|
System.out.println(e.getMessage());
|
||||||
|
}
|
||||||
|
});
|
||||||
|
}
|
||||||
|
}
|
||||||
Loading…
Reference in New Issue