feat: change engine proxy to use flatbuffer implementation over wasm (#333)

Author: chriswk

.gitignore

@@ -46,3 +46,4 @@ target
 **/bin/
 .vim/
 *.versionsBackup
+mise.toml

benches/jmh/unleash-client-benches/pom.xml

@@ -1,34 +1,3 @@
-<!--
-Copyright (c) 2014, Oracle America, Inc.
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are met:
-
- * Redistributions of source code must retain the above copyright notice,
-   this list of conditions and the following disclaimer.
-
- * Redistributions in binary form must reproduce the above copyright
-   notice, this list of conditions and the following disclaimer in the
-   documentation and/or other materials provided with the distribution.
-
- * Neither the name of Oracle nor the names of its contributors may be used
-   to endorse or promote products derived from this software without
-   specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
-LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
-CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
-THE POSSIBILITY OF SUCH DAMAGE.
--->
-
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>

benches/jmh/unleash-client-benches/src/main/java/io/getunleash/UnleashClientBenchmark.java

@@ -56,6 +56,7 @@ public void isEnabledWithContext(MyState myState, Blackhole bh) {
         bh.consume(myState.unleash.isEnabled("Test.impressionDataPresent", myState.context));
     }
 
+
     @Benchmark
     public void getDefaultVariant(MyState myState, Blackhole bh) {
         bh.consume(myState.unleash.getVariant("Test.impressionDataPresent"));

examples/cli-example/build.gradle.kts

@@ -1,6 +1,7 @@
 plugins {
     java
     application
+    id("com.google.cloud.tools.jib").version("3.4.5")
 }
 
 application {
@@ -12,7 +13,36 @@ repositories {
     mavenLocal()
 }
 
+java {
+    targetCompatibility = JavaVersion.VERSION_25
+    sourceCompatibility = JavaVersion.VERSION_25
+}
+
+jib {
+    container {
+        mainClass = "io.getunleash.example.AdvancedConstraints"
+    }
+    from {
+        image = "gcr.io/distroless/java25-debian13:latest"
+        platforms {
+            platform {
+                architecture = "amd64"
+                os = "linux"
+            }
+            platform {
+                architecture = "arm64"
+                os = "linux"
+            }
+        }
+    }
+}
+
 dependencies {
-    implementation("io.getunleash:unleash-client-java:11.1.0")
-    implementation("ch.qos.logback:logback-classic:1.4.12")
+    implementation("io.getunleash:unleash-client-java:11.2.0-SNAPSHOT")
+    implementation("org.slf4j:slf4j-api:2.0.17")
+    runtimeOnly("org.apache.logging.log4j:log4j-core:2.25.2")
+    runtimeOnly("org.apache.logging.log4j:log4j-api:2.25.2")
+    runtimeOnly("org.apache.logging.log4j:log4j-slf4j2-impl:2.25.2")
+    runtimeOnly("org.apache.logging.log4j:log4j-layout-template-json:2.25.2")
+    runtimeOnly("com.fasterxml.jackson.core:jackson-databind:2.20.1")
 }

examples/cli-example/gradle/wrapper/gradle-wrapper.jar

@@ -15,6 +15,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
+# SPDX-License-Identifier: Apache-2.0
+#
 
 ##############################################################################
 #
@@ -55,7 +57,7 @@
 #       Darwin, MinGW, and NonStop.
 #
 #   (3) This script is generated from the Groovy template
-#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
 #       within the Gradle project.
 #
 #       You can find Gradle at https://github.com/gradle/gradle/.
@@ -80,13 +82,11 @@ do
     esac
 done
 
-APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
-
-APP_NAME="Gradle"
+# This is normally unused
+# shellcheck disable=SC2034
 APP_BASE_NAME=${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"'
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD=maximum
@@ -133,22 +133,29 @@ 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.
+    if ! command -v java >/dev/null 2>&1
+    then
+        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
 fi
 
 # Increase the maximum file descriptors if we can.
 if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
     case $MAX_FD in #(
       max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
         MAX_FD=$( ulimit -H -n ) ||
             warn "Could not query maximum file descriptor limit"
     esac
     case $MAX_FD in  #(
       '' | soft) :;; #(
       *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
         ulimit -n "$MAX_FD" ||
             warn "Could not set maximum file descriptor limit to $MAX_FD"
     esac
@@ -193,18 +200,28 @@ if "$cygwin" || "$msys" ; then
     done
 fi
 
-# Collect all arguments for the java command;
-#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
-#     shell script including quotes and variable substitutions, so put them in
-#     double quotes to make sure that they get re-expanded; and
-#   * put everything else in single quotes, so that it's not re-expanded.
+
+# 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"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
 
 set -- \
         "-Dorg.gradle.appname=$APP_BASE_NAME" \
         -classpath "$CLASSPATH" \
         org.gradle.wrapper.GradleWrapperMain \
         "$@"
 
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
 # Use "xargs" to parse quoted args.
 #
 # With -n1 it outputs one arg per line, with the quotes and backslashes removed.

examples/cli-example/gradlew

@@ -13,8 +13,10 @@
 @rem See the License for the specific language governing permissions and
 @rem limitations under the License.
 @rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
 
-@if "%DEBUG%" == "" @echo off
+@if "%DEBUG%"=="" @echo off
 @rem ##########################################################################
 @rem
 @rem  Gradle startup script for Windows
@@ -25,7 +27,8 @@
 if "%OS%"=="Windows_NT" setlocal
 
 set DIRNAME=%~dp0
-if "%DIRNAME%" == "" set DIRNAME=.
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
 set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
@@ -40,13 +43,13 @@ if defined JAVA_HOME goto findJavaFromJavaHome
 
 set JAVA_EXE=java.exe
 %JAVA_EXE% -version >NUL 2>&1
-if "%ERRORLEVEL%" == "0" goto execute
+if %ERRORLEVEL% equ 0 goto execute
 
-echo.
-echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
 
 goto fail
 
@@ -56,11 +59,11 @@ set JAVA_EXE=%JAVA_HOME%/bin/java.exe
 
 if exist "%JAVA_EXE%" goto execute
 
-echo.
-echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
 
 goto fail
 
@@ -75,13 +78,15 @@ set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
 
 :end
 @rem End local scope for the variables with windows NT shell
-if "%ERRORLEVEL%"=="0" goto mainEnd
+if %ERRORLEVEL% equ 0 goto mainEnd
 
 :fail
 rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
 rem the _cmd.exe /c_ return code!
-if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
-exit /b 1
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
 
 :mainEnd
 if "%OS%"=="Windows_NT" endlocal

examples/cli-example/gradlew.bat

@@ -4,42 +4,36 @@
 import io.getunleash.Unleash;
 import io.getunleash.UnleashContext;
 import io.getunleash.util.UnleashConfig;
-import io.getunleash.event.UnleashReady;
-import io.getunleash.event.ClientFeaturesResponse;
-import io.getunleash.event.UnleashSubscriber;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 public class AdvancedConstraints {
+    private static final Logger LOGGER = LoggerFactory.getLogger(AdvancedConstraints.class);
 
     public static void main(String[] args) throws InterruptedException {
+        String callsPerSecondStr = getOrElse("UNLEASH_RPS", "5");
+        Integer callsPerSecond = Integer.parseInt(callsPerSecondStr);
+        int sleepInterval = (int) ((1.0 / callsPerSecond) * 1000.0);
+        String apiToken = getOrElse("UNLEASH_API_TOKEN",
+            "*:development.25a06b75248528f8ca93ce179dcdd141aedfb632231e0d21fd8ff349");
+        String apiUrl = getOrElse("UNLEASH_API_URL", "https://app.unleash-hosted.com/demo/api");
         UnleashConfig config = UnleashConfig.builder()
-                .appName("client-example.advanced.java")
-                .customHttpHeader(
-                        "Authorization",
-                        getOrElse("UNLEASH_API_TOKEN",
-                                "*:development.25a06b75248528f8ca93ce179dcdd141aedfb632231e0d21fd8ff349"))
-                .unleashAPI(getOrElse("UNLEASH_API_URL", "https://app.unleash-hosted.com/demo/api"))
-                .instanceId("java-example")
-                .synchronousFetchOnInitialisation(true)
-                .subscriber(new UnleashSubscriber() {
-                        public void onReady(UnleashReady ready) {
-                            System.out.println("Unleash is ready");
-                        }
-                        public void togglesFetched(ClientFeaturesResponse toggleResponse) {
-                            System.out.println("Fetch toggles with status: " + toggleResponse.getStatus());
-                        }
-                    })
-                .sendMetricsInterval(30).build();
-
-        Unleash unleash = new DefaultUnleash(config);
-        UnleashContext context = UnleashContext.builder()
-            .addProperty("semver", "1.5.2")
-            .build();
-        UnleashContext smallerSemver = UnleashContext.builder()
-            .addProperty("semver", "1.1.0")
+            .appName("client-example.advanced.java")
+            .customHttpHeader(
+                "Authorization",
+                apiToken)
+            .unleashAPI(apiUrl)
+            .instanceId("java-example")
+            .synchronousFetchOnInitialisation(true)
             .build();
+        LOGGER.info("Connecting to {}, evaluating at {} rps ({} ms interval)",apiUrl, callsPerSecond, sleepInterval);
+        Unleash unleash = new DefaultUnleash(config);
         while (true) {
-                    unleash.isEnabled("advanced.constraints", context); // expect this to be true
-                    unleash.isEnabled("advanced.constraints", smallerSemver); // expect this to be false
+            var results = unleash.more().evaluateAllToggles();
+            var toggle = unleash.isEnabled("openai.chat");
+            var variant = unleash.getVariant("openai.chat");
+            LOGGER.info("Got {} toggles and openai.chat enabled {},  variant name: {}, featureEnabled was {} for openai.chat. sleeping {}ms", results.size(), toggle, variant.getName(), variant.isFeatureEnabled(), sleepInterval);
+            Thread.sleep(sleepInterval);
         }
     }
 

examples/cli-example/src/main/java/io/getunleash/example/AdvancedConstraints.java

@@ -0,0 +1,35 @@
+package io.getunleash.example;
+
+import io.getunleash.DefaultUnleash;
+import io.getunleash.Unleash;
+import io.getunleash.UnleashContext;
+import io.getunleash.util.UnleashConfig;
+
+import static io.getunleash.example.AdvancedConstraints.getOrElse;
+
+public class GetVariant {
+    public static void main(String[] args) throws InterruptedException {
+        UnleashConfig config = UnleashConfig.builder()
+            .appName("client-example.advanced.java")
+            .customHttpHeader(
+                "Authorization",
+                getOrElse("UNLEASH_API_TOKEN",
+                    "*:development.25a06b75248528f8ca93ce179dcdd141aedfb632231e0d21fd8ff349"))
+            .unleashAPI(getOrElse("UNLEASH_API_URL", "https://app.unleash-hosted.com/demo/api"))
+            .instanceId("java-example")
+            .synchronousFetchOnInitialisation(true)
+            .sendMetricsInterval(30).build();
+        Unleash unleash = new DefaultUnleash(config);
+        UnleashContext context = UnleashContext.builder()
+            .addProperty("semver", "1.5.2")
+            .build();
+        UnleashContext smallerSemver = UnleashContext.builder()
+            .addProperty("semver", "1.1.0")
+            .build();
+        while (true) {
+            unleash.getVariant("advanced.constraints"); // expect this to be true
+            unleash.getVariant("advanced.constraints", smallerSemver); // expect this to be false
+            Thread.sleep(1);
+        }
+    }
+}