Initial commit

.gitignore

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+### Java template
+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# BlueJ files
+*.ctxt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+
+/build
+/.idea
+/.gradle
+/out

README.md

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+
+# EventBus
+A blazingly fast, small, multi-threadable and feature-rich event bus for Java
+
+## Features
+- Uses ASM to invoke listeners, which performs as fast as direct method invokation, unlike reflection
+- Built to be thread-safe and well-supported for use in multi-threaded environments.
+- Allows the usage of normal reflection in cases where ASM is not desired.
+- Provides easy classes for benchmarking and debugging
+- Ability to generate events from interfaces using ASM, which reduces the hassle of writing constructors, null checks, toString()/equals()/hashCode(), etc.
+
+## Usage
+
+### Example event use
+```java
+EventBus bus = EventBusBuilder.asm() // can be methodHandles() or reflection()    
+   .executor(Executors.newSingleThreadExecutor()) // optional    
+   .scanAnnotations(MyCustomAnnotation.class) // optional    
+   .exceptionHandler(new MyCustomExceptionHandler()) // optional    
+   .build();  
+
+bus.register(new MyListener());  
+
+bus.register(CustomEvent.class, event -> {  
+    System.out.println("Woo!");  
+    System.out.println(event);  
+});  
+
+bus.register(CustomEvent.class, new EventListener<CustomEvent>() {  
+      @Override  
+      public void handle(@NotNull CustomEvent event) throws Throwable {  
+          System.out.println("Called once!");  
+          bus.unregister(this);  
+     }  
+ });  
+
+bus.post(new CustomEvent(1, "custom property", true))  
+
+@SubscribeEvent  
+public void onCustomEvent(CustomEvent event) {  
+    System.out.println("Hello from onCustomEvent()");  
+}
+```
+
+### Generated event (requires ASM)
+```java
+public interface ArrowLaunchEvent {  
+
+  @Index(0) String getLauncher();  
+
+  @Index(1) Vector getVelocity();  
+
+  @Index(1) void setVelocity(@RequireNonNull Vector vector);  
+
+}
+
+EventBus bus = ...
+bus.post(ArrowLaunchEvent.class, "Hunter", new Vector(1, 1, 1))
+```
+
+which will generate the following:
+```java
+public final class ArrowLaunchEvent implements our.custom.ArrowLaunchEvent {
+
+    private String launcher;
+    private Vector velocity;
+
+    public ArrowLaunchEvent(String launcher, Vector velocity) {
+        this.launcher = launcher;
+        this.velocity = velocity;
+    }
+
+    public String getLauncher() {
+        return launcher;
+    }
+
+    public Vector getVelocity() {
+        return velocity;
+    }
+
+    public void setVelocity(Vector vector) {
+        velocity = Objects.requireNonNull(vector, "velocity cannot be null!");
+    }
+
+    public boolean equals(Object other) {
+        if (this == other) {
+            return true;
+        } else if (!(other instanceof ArrowLaunchEvent)) {
+            return false;
+        } else {
+            GeneratedEqualsBuilder builder = new GeneratedEqualsBuilder();
+            builder.append(launcher, ((ArrowLaunchEvent) other).launcher);
+            builder.append(velocity, ((ArrowLaunchEvent) other).velocity);
+            return builder.isEquals();
+        }
+    }
+
+    public int hashCode() {
+        return Objects.hash(launcher, velocity);
+    }
+
+    public String toString() {
+        GeneratedToStringBuilder builder = new GeneratedToStringBuilder("ArrowLaunchEvent");
+        builder.append("launcher", launcher);
+        builder.append("velocity", velocity);
+        return builder.toString();
+    }
+}
+```

build.gradle

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+plugins {
+    id 'java'
+}
+
+group 'io.github.revxrsal'
+version '1.0'
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    compileOnly 'org.jetbrains:annotations:21.0.1'
+    testCompileOnly 'org.jetbrains:annotations:21.0.1'
+
+    implementation group: 'org.ow2.asm', name: 'asm', version: '9.1'
+    testImplementation group: 'org.ow2.asm', name: 'asm', version: '9.1'
+}

gradle/wrapper/gradle-wrapper.properties

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+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.8-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

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+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"