diff --git a/.github/workflows/publish_jar.yaml b/.github/workflows/publish_jar.yaml new file mode 100644 index 00000000..5789ec2f --- /dev/null +++ b/.github/workflows/publish_jar.yaml @@ -0,0 +1,45 @@ +# This workflow uses actions that are not certified by GitHub. +# They are provided by a third-party and are governed by +# separate terms of service, privacy policy, and support +# documentation. + +# GitHub recommends pinning actions to a commit SHA. +# To get a newer version, you will need to update the SHA. +# You can also reference a tag or branch, but the action may change without warning. + +name: Publish java client to GitHub Packages + +on: workflow_dispatch + +jobs: + publish: + runs-on: ubuntu-latest + permissions: + contents: read + packages: write + steps: + - name: checkout + uses: actions/checkout@v4 + + - name: java setup + uses: actions/setup-java@v4 + with: + java-version: '11' + distribution: 'corretto' + + - name: Setup Gradle + uses: gradle/actions/setup-gradle@af1da67850ed9a4cedd57bfd976089dd991e2582 # v4.0.0 + + - name: Publish cac client + run: | + cd clients/java/cac-client + ./gradlew publish --console=rich + env: + GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} + + - name: Publish exp client + run: | + cd clients/java/exp-client + ./gradlew publish --console=rich + env: + GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} diff --git a/.gitignore b/.gitignore index ba181d30..ebb8f467 100644 --- a/.gitignore +++ b/.gitignore @@ -34,4 +34,9 @@ test_logs .cargo # pre-commit config .pre-commit-config.yaml -.cargo \ No newline at end of file +.cargo + +#gradle files +.gradle +build +.java~ diff --git a/clients/java/README.md b/clients/java/README.md new file mode 100644 index 00000000..1c4aeffb --- /dev/null +++ b/clients/java/README.md @@ -0,0 +1,102 @@ +# JAVA Client + +## Prerequisites + +- Java JDK +- Gradle 7.0 or later + +## Building the Project + +To build the project, run: +``` +./gradlew build +``` + +## Running the Application + +To run the application: +``` +./gradlew run +``` + +## Publishing the clients locally and using it + +Publish cac-client +``` +cd clients/java/cac-client +./gradlew publishToMavenLocal +``` + +Publish exp-client +``` +cd clients/java/exp-client +./gradlew publishToMavenLocal +``` + +### Use the clients in another project + +build.gradle +``` +plugins { + id 'java' + id 'application' +} + +repositories { + // mavenLocal() // if using local Maven repository + mavenCentral() // It's good to have this as a fallback + maven { + name = "GitHubPackages" + url = uri("https://maven.pkg.github.com/juspay/superposition") + credentials { + username = System.getenv("GITHUB_USERNAME") + password = System.getenv("GITHUB_TOKEN") + } + } +} + +dependencies { + implementation 'com.github.jnr:jnr-ffi:2.2.16' + implementation 'com.github.jnr:jffi:1.3.13' + implementation 'juspay.superposition:cac-client:0.0.1' + implementation 'juspay.superposition:exp-client:0.0.1' +} + +application { + mainClassName = 'Client' // main class name +} +``` + +Client.java +``` +import cac_client.CacClient; +import exp_client.ExperimentationClient; +import cac_client.CACClientException; +import exp_client.EXPClientException; +import java.util.concurrent.CountDownLatch; + +public class Client { + public static void main(String[] args) { + CountDownLatch latch = new CountDownLatch(1); + try { + CacClient cac_wrapper = new CacClient(); + // Use cac-client's functions + ExperimentationClient exp_wrapper = new ExperimentationClient(); + // Use exp-client's functions + latch.await(); // This will keep the main thread alive + } catch (InterruptedException e) { + System.err.println("Main thread interrupted: " + e.getMessage()); + } finally { + System.out.println("Application stopped."); + } + } +} +``` + +## If having issues +Try exporting these +``` +export SUPERPOSITION_LIB_PATH=".../superposition/target/debug" +export PATH=$JAVA_HOME/bin:$PATH +export JAVA_HOME=/opt/homebrew/opt/openjdk +``` \ No newline at end of file diff --git a/clients/java/cac-client/bin/main/cac_client/CACClientException.class b/clients/java/cac-client/bin/main/cac_client/CACClientException.class new file mode 100644 index 00000000..6390e14e Binary files /dev/null and b/clients/java/cac-client/bin/main/cac_client/CACClientException.class differ diff --git a/clients/java/cac-client/bin/main/cac_client/CacClient$RustLib.class b/clients/java/cac-client/bin/main/cac_client/CacClient$RustLib.class new file mode 100644 index 00000000..98b610ff Binary files /dev/null and b/clients/java/cac-client/bin/main/cac_client/CacClient$RustLib.class differ diff --git a/clients/java/cac-client/bin/main/cac_client/CacClient.class b/clients/java/cac-client/bin/main/cac_client/CacClient.class new file mode 100644 index 00000000..adc51668 Binary files /dev/null and b/clients/java/cac-client/bin/main/cac_client/CacClient.class differ diff --git a/clients/java/cac-client/bin/main/example/Demo.class b/clients/java/cac-client/bin/main/example/Demo.class new file mode 100644 index 00000000..2faabe37 Binary files /dev/null and b/clients/java/cac-client/bin/main/example/Demo.class differ diff --git a/clients/java/cac-client/build.gradle b/clients/java/cac-client/build.gradle new file mode 100644 index 00000000..b275c6a4 --- /dev/null +++ b/clients/java/cac-client/build.gradle @@ -0,0 +1,41 @@ +plugins { + id 'java-library' + id 'maven-publish' + id 'java' + id 'application' +} + +group 'juspay.superposition' +version '0.0.1' + +repositories { + mavenCentral() +} + +dependencies { + implementation 'com.github.jnr:jnr-ffi:2.2.16' + implementation 'com.github.jnr:jffi:1.3.13' + // Add other dependencies your library needs +} + +publishing { + publications { + myLib(MavenPublication) { + from (components.java) + } + } + repositories { + maven { + name = "GitHubPackages" + url = uri('https://maven.pkg.github.com/juspay/superposition') + credentials { + username = System.getenv("GITHUB_ACTOR") + password = System.getenv("GITHUB_TOKEN") + } + } + } +} + +application { + mainClassName = 'example.Demo' +} diff --git a/clients/java/cac-client/gradle/wrapper/gradle-wrapper.jar b/clients/java/cac-client/gradle/wrapper/gradle-wrapper.jar new file mode 100644 index 00000000..2c352119 Binary files /dev/null and b/clients/java/cac-client/gradle/wrapper/gradle-wrapper.jar differ diff --git a/clients/java/cac-client/gradle/wrapper/gradle-wrapper.properties b/clients/java/cac-client/gradle/wrapper/gradle-wrapper.properties new file mode 100644 index 00000000..09523c0e --- /dev/null +++ b/clients/java/cac-client/gradle/wrapper/gradle-wrapper.properties @@ -0,0 +1,7 @@ +distributionBase=GRADLE_USER_HOME +distributionPath=wrapper/dists +distributionUrl=https\://services.gradle.org/distributions/gradle-8.9-bin.zip +networkTimeout=10000 +validateDistributionUrl=true +zipStoreBase=GRADLE_USER_HOME +zipStorePath=wrapper/dists diff --git a/clients/java/cac-client/gradlew b/clients/java/cac-client/gradlew new file mode 100755 index 00000000..f5feea6d --- /dev/null +++ b/clients/java/cac-client/gradlew @@ -0,0 +1,252 @@ +#!/bin/sh + +# +# Copyright © 2015-2021 the original 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. +# +# SPDX-License-Identifier: Apache-2.0 +# + +############################################################################## +# +# Gradle start up script for POSIX generated by Gradle. +# +# Important for running: +# +# (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is +# noncompliant, but you have some other compliant shell such as ksh or +# bash, then to run this script, type that shell name before the whole +# command line, like: +# +# ksh Gradle +# +# Busybox and similar reduced shells will NOT work, because this script +# requires all of these POSIX shell features: +# * functions; +# * expansions «$var», «${var}», «${var:-default}», «${var+SET}», +# «${var#prefix}», «${var%suffix}», and «$( cmd )»; +# * compound commands having a testable exit status, especially «case»; +# * various built-in commands including «command», «set», and «ulimit». +# +# Important for patching: +# +# (2) This script targets any POSIX shell, so it avoids extensions provided +# by Bash, Ksh, etc; in particular arrays are avoided. +# +# The "traditional" practice of packing multiple parameters into a +# space-separated string is a well documented source of bugs and security +# problems, so this is (mostly) avoided, by progressively accumulating +# options in "$@", and eventually passing that to Java. +# +# Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS, +# and GRADLE_OPTS) rely on word-splitting, this is performed explicitly; +# see the in-line comments for details. +# +# There are tweaks for specific operating systems such as AIX, CygWin, +# Darwin, MinGW, and NonStop. +# +# (3) This script is generated from the Groovy template +# 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/. +# +############################################################################## + +# Attempt to set APP_HOME + +# Resolve links: $0 may be a link +app_path=$0 + +# Need this for daisy-chained symlinks. +while + APP_HOME=${app_path%"${app_path##*/}"} # leaves a trailing /; empty if no leading path + [ -h "$app_path" ] +do + ls=$( ls -ld "$app_path" ) + link=${ls#*' -> '} + case $link in #( + /*) app_path=$link ;; #( + *) app_path=$APP_HOME$link ;; + esac +done + +# This is normally unused +# shellcheck disable=SC2034 +APP_BASE_NAME=${0##*/} +# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036) +APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s +' "$PWD" ) || exit + +# Use the maximum available, or set MAX_FD != -1 to use that value. +MAX_FD=maximum + +warn () { + echo "$*" +} >&2 + +die () { + echo + echo "$*" + echo + exit 1 +} >&2 + +# OS specific support (must be 'true' or 'false'). +cygwin=false +msys=false +darwin=false +nonstop=false +case "$( uname )" in #( + CYGWIN* ) cygwin=true ;; #( + Darwin* ) darwin=true ;; #( + MSYS* | MINGW* ) msys=true ;; #( + NONSTOP* ) nonstop=true ;; +esac + +CLASSPATH=$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: $JAVA_HOME + +Please set the JAVA_HOME variable in your environment to match the +location of your Java installation." + fi +else + JAVACMD=java + if ! command -v java >/dev/null 2>&1 + then + die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. + +Please set the JAVA_HOME variable in your environment to match the +location of your Java installation." + fi +fi + +# Increase the maximum file descriptors if we can. +if ! "$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 $MAX_FD" + esac +fi + +# Collect all arguments for the java command, stacking in reverse order: +# * args from the command line +# * the main class name +# * -classpath +# * -D...appname settings +# * --module-path (only if needed) +# * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables. + +# For Cygwin or MSYS, switch paths to Windows format before running java +if "$cygwin" || "$msys" ; then + APP_HOME=$( cygpath --path --mixed "$APP_HOME" ) + CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" ) + + JAVACMD=$( cygpath --unix "$JAVACMD" ) + + # Now convert the arguments - kludge to limit ourselves to /bin/sh + for arg do + if + case $arg in #( + -*) false ;; # don't mess with options #( + /?*) t=${arg#/} t=/${t%%/*} # looks like a POSIX filepath + [ -e "$t" ] ;; #( + *) false ;; + esac + then + arg=$( cygpath --path --ignore --mixed "$arg" ) + fi + # Roll the args list around exactly as many times as the number of + # args, so each arg winds up back in the position where it started, but + # possibly modified. + # + # NB: a `for` loop captures its iteration list before it begins, so + # changing the positional parameters here affects neither the number of + # iterations, nor the values presented in `arg`. + shift # remove old arg + set -- "$@" "$arg" # push replacement arg + done +fi + + +# 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 \ + "$@" + +# Stop when "xargs" is not available. +if ! command -v xargs >/dev/null 2>&1 +then + die "xargs is not available" +fi + +# Use "xargs" to parse quoted args. +# +# With -n1 it outputs one arg per line, with the quotes and backslashes removed. +# +# In Bash we could simply go: +# +# readarray ARGS < <( xargs -n1 <<<"$var" ) && +# set -- "${ARGS[@]}" "$@" +# +# but POSIX shell has neither arrays nor command substitution, so instead we +# post-process each arg (as a line of input to sed) to backslash-escape any +# character that might be a shell metacharacter, then use eval to reverse +# that process (while maintaining the separation between arguments), and wrap +# the whole thing up as a single "set" statement. +# +# This will of course break if any of these variables contains a newline or +# an unmatched quote. +# + +eval "set -- $( + printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" | + xargs -n1 | + sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' | + tr '\n' ' ' + )" '"$@"' + +exec "$JAVACMD" "$@" diff --git a/clients/java/cac-client/gradlew.bat b/clients/java/cac-client/gradlew.bat new file mode 100644 index 00000000..9b42019c --- /dev/null +++ b/clients/java/cac-client/gradlew.bat @@ -0,0 +1,94 @@ +@rem +@rem Copyright 2015 the original author or authors. +@rem +@rem Licensed under the Apache License, Version 2.0 (the "License"); +@rem you may not use this file except in compliance with the License. +@rem You may obtain a copy of the License at +@rem +@rem https://www.apache.org/licenses/LICENSE-2.0 +@rem +@rem Unless required by applicable law or agreed to in writing, software +@rem distributed under the License is distributed on an "AS IS" BASIS, +@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +@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 +@rem ########################################################################## +@rem +@rem Gradle startup script for Windows +@rem +@rem ########################################################################## + +@rem Set local scope for the variables with windows NT shell +if "%OS%"=="Windows_NT" setlocal + +set DIRNAME=%~dp0 +if "%DIRNAME%"=="" set DIRNAME=. +@rem This is normally unused +set APP_BASE_NAME=%~n0 +set APP_HOME=%DIRNAME% + +@rem Resolve any "." and ".." in APP_HOME to make it shorter. +for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi + +@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. +set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m" + +@rem Find java.exe +if defined JAVA_HOME goto findJavaFromJavaHome + +set JAVA_EXE=java.exe +%JAVA_EXE% -version >NUL 2>&1 +if %ERRORLEVEL% equ 0 goto execute + +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 + +:findJavaFromJavaHome +set JAVA_HOME=%JAVA_HOME:"=% +set JAVA_EXE=%JAVA_HOME%/bin/java.exe + +if exist "%JAVA_EXE%" goto execute + +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 + +:execute +@rem Setup the command line + +set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar + + +@rem Execute Gradle +"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %* + +:end +@rem End local scope for the variables with windows NT shell +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! +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 + +:omega diff --git a/clients/java/cac-client/settings.gradle b/clients/java/cac-client/settings.gradle new file mode 100644 index 00000000..6f4099e1 --- /dev/null +++ b/clients/java/cac-client/settings.gradle @@ -0,0 +1,13 @@ +/* + * This file was generated by the Gradle 'init' task. + * + * The settings file is used to specify which projects to include in your build. + * For more detailed information on multi-project builds, please refer to https://docs.gradle.org/8.9/userguide/multi_project_builds.html in the Gradle documentation. + */ + +plugins { + // Apply the foojay-resolver plugin to allow automatic download of JDKs + id("org.gradle.toolchains.foojay-resolver-convention") version "0.8.0" +} + +rootProject.name = 'cac-client' diff --git a/clients/java/cac-client/src/main/java/cac_client/CACClientException.java b/clients/java/cac-client/src/main/java/cac_client/CACClientException.java new file mode 100644 index 00000000..420200a5 --- /dev/null +++ b/clients/java/cac-client/src/main/java/cac_client/CACClientException.java @@ -0,0 +1,7 @@ +package cac_client; + +public class CACClientException extends Exception { + public CACClientException(String message) { + super(message); + } +} \ No newline at end of file diff --git a/clients/java/cac-client/src/main/java/cac_client/CacClient.java b/clients/java/cac-client/src/main/java/cac_client/CacClient.java new file mode 100644 index 00000000..3a8ac76e --- /dev/null +++ b/clients/java/cac-client/src/main/java/cac_client/CacClient.java @@ -0,0 +1,128 @@ +package cac_client; + +import java.io.IOException; + +import jnr.ffi.LibraryLoader; +import jnr.ffi.Pointer; + +public class CacClient { + + public interface RustLib { + String cac_last_error_message(); + + int cac_new_client(String tenant, long updateFrequency, String hostName); + + void cac_free_client(Pointer ptr); + + Pointer cac_get_client(String tenant); + + Pointer cac_get_config(Pointer clientPtr, String filterQuery, String filterPrefix); + + Pointer cac_get_default_config(Pointer clientPtr, String filterKeys); + + void cac_start_polling_update(String tenant); + + Pointer cac_get_last_modified(Pointer clientPtr); + + Pointer cac_get_resolved_config(Pointer clientPtr, String filterQuery, String filterPrefix, String merge_strategy); + + void cac_free_string(Pointer s); + } + + public static RustLib rustLib; + + public CacClient() { + String libraryName = "cac_client"; + String libraryPath = System.getenv("SUPERPOSITION_LIB_PATH"); + System.out.println("libraryPath" + libraryPath); + System.setProperty("jnr.ffi.library.path", libraryPath); + CacClient.rustLib = LibraryLoader.create(RustLib.class).load(libraryName); + } + + public int cacNewClient(String tenant, long updateFrequency, String hostName) throws CACClientException { + int result = rustLib.cac_new_client(tenant, updateFrequency, hostName); + if (result > 0) { + String errorMessage = rustLib.cac_last_error_message(); + throw new CACClientException("Failed to create new CAC client: " + errorMessage); + } + return result; + } + + public Pointer getCacClient(String tenant) throws IOException { + Pointer clientPtr = rustLib.cac_get_client(tenant); + return clientPtr; + } + + public String getConfig(Pointer clientPtr, String filterQuery, String filterPrefix) throws IOException { + Pointer result = rustLib.cac_get_config(clientPtr, filterQuery, filterPrefix); + if (result == null) { + String errorMessage = rustLib.cac_last_error_message(); + throw new IOException("Failed to get config: " + errorMessage); + } + String config = getStringAndFree(result); + return config; + } + + public String getDefaultConfig(Pointer clientPtr, String filterKeys) throws IOException { + Pointer result = rustLib.cac_get_default_config(clientPtr, filterKeys); + if (result == null) { + String errorMessage = rustLib.cac_last_error_message(); + throw new IOException("Failed to get default config: " + errorMessage); + } + String config = getStringAndFree(result); + return config; + } + + public void startPollingUpdate(String tenant) throws IOException { + rustLib.cac_start_polling_update(tenant); + } + + public String getLastModified(Pointer clientPtr) throws IOException { + Pointer result = rustLib.cac_get_last_modified(clientPtr); + if (result == null) { + String errorMessage = rustLib.cac_last_error_message(); + throw new IOException("Failed to get last modified: " + errorMessage); + } + String lastModified = getStringAndFree(result); + return lastModified; + } + + public String getResolvedConfig(Pointer clientPtr, String filterQuery, String filterPrefix, String mergeStrategy) + throws IOException { + Pointer result = rustLib.cac_get_resolved_config(clientPtr, filterQuery, filterPrefix, mergeStrategy); + if (result == null) { + String errorMessage = rustLib.cac_last_error_message(); + throw new IOException("Failed to get resolved config: " + errorMessage); + } + String resolvedConfig = getStringAndFree(result); + return resolvedConfig; + } + + public void cacFreeClient(Pointer clientPtr) throws IOException{ + rustLib.cac_free_client(clientPtr); + } + + public String getLastError() throws IOException { + String errorMessage = rustLib.cac_last_error_message(); + if (errorMessage != null) { + return errorMessage; + } else { + return "No error"; + } + } + + public void freeString(Pointer ptr) { + rustLib.cac_free_string(ptr); + } + + public String getStringAndFree(Pointer ptr) { + if (ptr == null) { + return null; + } + try { + return ptr.getString(0); + } finally { + freeString(ptr); + } + } +} diff --git a/clients/java/cac-client/src/main/java/example/Demo.java b/clients/java/cac-client/src/main/java/example/Demo.java new file mode 100644 index 00000000..16c26783 --- /dev/null +++ b/clients/java/cac-client/src/main/java/example/Demo.java @@ -0,0 +1,103 @@ +package example; +import java.io.IOException; +import java.util.concurrent.CountDownLatch; + +import cac_client.CacClient; +import jnr.ffi.Pointer; + +public class Demo { + + private static void callCacClient() { + String tenant = "dev"; + + System.out.println("CAC Client"); + + System.out.println("---------------------"); + + CacClient wrapper = new CacClient(); + + int newClient; + try { + newClient = wrapper.cacNewClient(tenant, 1, "http://localhost:8080"); + System.out.println("New client created successfully. Client ID: " + newClient); + } catch (cac_client.CACClientException e) { + System.err.println(e.getMessage()); + } + + System.out.println("---------------------"); + + Thread pollingThread = new Thread(() -> { + try { + wrapper.startPollingUpdate(tenant); + } catch (IOException e) { + System.err.println("Error in polling thread: " + e.getMessage()); + } + }); + pollingThread.setDaemon(true); + pollingThread.start(); + System.out.println("Started polling in a new thread for tenant: " + tenant); + + System.out.println("---------------------"); + + Pointer clientPtr; + try { + clientPtr = wrapper.getCacClient(tenant); + System.out.println("Result from getCacClient: " + clientPtr); + + System.out.println("---------------------"); + + String config; + try { + config = wrapper.getConfig(clientPtr, null, null); + System.out.println("Config: " + config); + } catch (IOException e) { + System.err.println(e.getMessage()); + } + + System.out.println("---------------------"); + + String defaultConfig; + try { + defaultConfig = wrapper.getDefaultConfig(clientPtr, null); + System.out.println("Default Config: " + defaultConfig); + } catch (IOException e) { + System.err.println(e.getMessage()); + } + + System.out.println("---------------------"); + + String lastModified; + try { + lastModified = wrapper.getLastModified(clientPtr); + System.out.println("Last Modified: " + lastModified); + } catch (IOException e) { + System.err.println(e.getMessage()); + } + + System.out.println("---------------------"); + + String resolvedConfig; + try { + resolvedConfig = wrapper.getResolvedConfig(clientPtr, "{\"clientId\": \"zepto\"}", null, "MERGE"); + System.out.println("Resolved Config: " + resolvedConfig); + } catch (IOException e) { + System.err.println(e.getMessage()); + } + } catch (IOException e) { + System.err.println(e.getMessage()); + } + } + + public static void main(String[] args) { + CountDownLatch latch = new CountDownLatch(1); + + try { + callCacClient(); + latch.await(); // This will keep the main thread alive + } catch (InterruptedException e) { + System.err.println("Main thread interrupted: " + e.getMessage()); + } finally { + System.out.println("Application stopped."); + } + } +} diff --git a/clients/java/exp-client/bin/main/example/Demo.class b/clients/java/exp-client/bin/main/example/Demo.class new file mode 100644 index 00000000..b810ba50 Binary files /dev/null and b/clients/java/exp-client/bin/main/example/Demo.class differ diff --git a/clients/java/exp-client/bin/main/exp_client/EXPClientException.class b/clients/java/exp-client/bin/main/exp_client/EXPClientException.class new file mode 100644 index 00000000..16274135 Binary files /dev/null and b/clients/java/exp-client/bin/main/exp_client/EXPClientException.class differ diff --git a/clients/java/exp-client/bin/main/exp_client/ExperimentationClient$RustLib.class b/clients/java/exp-client/bin/main/exp_client/ExperimentationClient$RustLib.class new file mode 100644 index 00000000..a9a6e37f Binary files /dev/null and b/clients/java/exp-client/bin/main/exp_client/ExperimentationClient$RustLib.class differ diff --git a/clients/java/exp-client/bin/main/exp_client/ExperimentationClient.class b/clients/java/exp-client/bin/main/exp_client/ExperimentationClient.class new file mode 100644 index 00000000..f0d7766d Binary files /dev/null and b/clients/java/exp-client/bin/main/exp_client/ExperimentationClient.class differ diff --git a/clients/java/exp-client/build.gradle b/clients/java/exp-client/build.gradle new file mode 100644 index 00000000..b275c6a4 --- /dev/null +++ b/clients/java/exp-client/build.gradle @@ -0,0 +1,41 @@ +plugins { + id 'java-library' + id 'maven-publish' + id 'java' + id 'application' +} + +group 'juspay.superposition' +version '0.0.1' + +repositories { + mavenCentral() +} + +dependencies { + implementation 'com.github.jnr:jnr-ffi:2.2.16' + implementation 'com.github.jnr:jffi:1.3.13' + // Add other dependencies your library needs +} + +publishing { + publications { + myLib(MavenPublication) { + from (components.java) + } + } + repositories { + maven { + name = "GitHubPackages" + url = uri('https://maven.pkg.github.com/juspay/superposition') + credentials { + username = System.getenv("GITHUB_ACTOR") + password = System.getenv("GITHUB_TOKEN") + } + } + } +} + +application { + mainClassName = 'example.Demo' +} diff --git a/clients/java/exp-client/gradle/libs.versions.toml b/clients/java/exp-client/gradle/libs.versions.toml new file mode 100644 index 00000000..dec9eee1 --- /dev/null +++ b/clients/java/exp-client/gradle/libs.versions.toml @@ -0,0 +1,10 @@ +# This file was generated by the Gradle 'init' task. +# https://docs.gradle.org/current/userguide/platforms.html#sub::toml-dependencies-format + +[versions] +guava = "33.1.0-jre" +junit-jupiter = "5.10.2" + +[libraries] +guava = { module = "com.google.guava:guava", version.ref = "guava" } +junit-jupiter = { module = "org.junit.jupiter:junit-jupiter", version.ref = "junit-jupiter" } diff --git a/clients/java/exp-client/gradle/wrapper/gradle-wrapper.jar b/clients/java/exp-client/gradle/wrapper/gradle-wrapper.jar new file mode 100644 index 00000000..2c352119 Binary files /dev/null and b/clients/java/exp-client/gradle/wrapper/gradle-wrapper.jar differ diff --git a/clients/java/exp-client/gradle/wrapper/gradle-wrapper.properties b/clients/java/exp-client/gradle/wrapper/gradle-wrapper.properties new file mode 100644 index 00000000..09523c0e --- /dev/null +++ b/clients/java/exp-client/gradle/wrapper/gradle-wrapper.properties @@ -0,0 +1,7 @@ +distributionBase=GRADLE_USER_HOME +distributionPath=wrapper/dists +distributionUrl=https\://services.gradle.org/distributions/gradle-8.9-bin.zip +networkTimeout=10000 +validateDistributionUrl=true +zipStoreBase=GRADLE_USER_HOME +zipStorePath=wrapper/dists diff --git a/clients/java/exp-client/gradlew b/clients/java/exp-client/gradlew new file mode 100755 index 00000000..f5feea6d --- /dev/null +++ b/clients/java/exp-client/gradlew @@ -0,0 +1,252 @@ +#!/bin/sh + +# +# Copyright © 2015-2021 the original 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. +# +# SPDX-License-Identifier: Apache-2.0 +# + +############################################################################## +# +# Gradle start up script for POSIX generated by Gradle. +# +# Important for running: +# +# (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is +# noncompliant, but you have some other compliant shell such as ksh or +# bash, then to run this script, type that shell name before the whole +# command line, like: +# +# ksh Gradle +# +# Busybox and similar reduced shells will NOT work, because this script +# requires all of these POSIX shell features: +# * functions; +# * expansions «$var», «${var}», «${var:-default}», «${var+SET}», +# «${var#prefix}», «${var%suffix}», and «$( cmd )»; +# * compound commands having a testable exit status, especially «case»; +# * various built-in commands including «command», «set», and «ulimit». +# +# Important for patching: +# +# (2) This script targets any POSIX shell, so it avoids extensions provided +# by Bash, Ksh, etc; in particular arrays are avoided. +# +# The "traditional" practice of packing multiple parameters into a +# space-separated string is a well documented source of bugs and security +# problems, so this is (mostly) avoided, by progressively accumulating +# options in "$@", and eventually passing that to Java. +# +# Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS, +# and GRADLE_OPTS) rely on word-splitting, this is performed explicitly; +# see the in-line comments for details. +# +# There are tweaks for specific operating systems such as AIX, CygWin, +# Darwin, MinGW, and NonStop. +# +# (3) This script is generated from the Groovy template +# 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/. +# +############################################################################## + +# Attempt to set APP_HOME + +# Resolve links: $0 may be a link +app_path=$0 + +# Need this for daisy-chained symlinks. +while + APP_HOME=${app_path%"${app_path##*/}"} # leaves a trailing /; empty if no leading path + [ -h "$app_path" ] +do + ls=$( ls -ld "$app_path" ) + link=${ls#*' -> '} + case $link in #( + /*) app_path=$link ;; #( + *) app_path=$APP_HOME$link ;; + esac +done + +# This is normally unused +# shellcheck disable=SC2034 +APP_BASE_NAME=${0##*/} +# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036) +APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s +' "$PWD" ) || exit + +# Use the maximum available, or set MAX_FD != -1 to use that value. +MAX_FD=maximum + +warn () { + echo "$*" +} >&2 + +die () { + echo + echo "$*" + echo + exit 1 +} >&2 + +# OS specific support (must be 'true' or 'false'). +cygwin=false +msys=false +darwin=false +nonstop=false +case "$( uname )" in #( + CYGWIN* ) cygwin=true ;; #( + Darwin* ) darwin=true ;; #( + MSYS* | MINGW* ) msys=true ;; #( + NONSTOP* ) nonstop=true ;; +esac + +CLASSPATH=$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: $JAVA_HOME + +Please set the JAVA_HOME variable in your environment to match the +location of your Java installation." + fi +else + JAVACMD=java + if ! command -v java >/dev/null 2>&1 + then + die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. + +Please set the JAVA_HOME variable in your environment to match the +location of your Java installation." + fi +fi + +# Increase the maximum file descriptors if we can. +if ! "$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 $MAX_FD" + esac +fi + +# Collect all arguments for the java command, stacking in reverse order: +# * args from the command line +# * the main class name +# * -classpath +# * -D...appname settings +# * --module-path (only if needed) +# * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables. + +# For Cygwin or MSYS, switch paths to Windows format before running java +if "$cygwin" || "$msys" ; then + APP_HOME=$( cygpath --path --mixed "$APP_HOME" ) + CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" ) + + JAVACMD=$( cygpath --unix "$JAVACMD" ) + + # Now convert the arguments - kludge to limit ourselves to /bin/sh + for arg do + if + case $arg in #( + -*) false ;; # don't mess with options #( + /?*) t=${arg#/} t=/${t%%/*} # looks like a POSIX filepath + [ -e "$t" ] ;; #( + *) false ;; + esac + then + arg=$( cygpath --path --ignore --mixed "$arg" ) + fi + # Roll the args list around exactly as many times as the number of + # args, so each arg winds up back in the position where it started, but + # possibly modified. + # + # NB: a `for` loop captures its iteration list before it begins, so + # changing the positional parameters here affects neither the number of + # iterations, nor the values presented in `arg`. + shift # remove old arg + set -- "$@" "$arg" # push replacement arg + done +fi + + +# 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 \ + "$@" + +# Stop when "xargs" is not available. +if ! command -v xargs >/dev/null 2>&1 +then + die "xargs is not available" +fi + +# Use "xargs" to parse quoted args. +# +# With -n1 it outputs one arg per line, with the quotes and backslashes removed. +# +# In Bash we could simply go: +# +# readarray ARGS < <( xargs -n1 <<<"$var" ) && +# set -- "${ARGS[@]}" "$@" +# +# but POSIX shell has neither arrays nor command substitution, so instead we +# post-process each arg (as a line of input to sed) to backslash-escape any +# character that might be a shell metacharacter, then use eval to reverse +# that process (while maintaining the separation between arguments), and wrap +# the whole thing up as a single "set" statement. +# +# This will of course break if any of these variables contains a newline or +# an unmatched quote. +# + +eval "set -- $( + printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" | + xargs -n1 | + sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' | + tr '\n' ' ' + )" '"$@"' + +exec "$JAVACMD" "$@" diff --git a/clients/java/exp-client/gradlew.bat b/clients/java/exp-client/gradlew.bat new file mode 100644 index 00000000..9b42019c --- /dev/null +++ b/clients/java/exp-client/gradlew.bat @@ -0,0 +1,94 @@ +@rem +@rem Copyright 2015 the original author or authors. +@rem +@rem Licensed under the Apache License, Version 2.0 (the "License"); +@rem you may not use this file except in compliance with the License. +@rem You may obtain a copy of the License at +@rem +@rem https://www.apache.org/licenses/LICENSE-2.0 +@rem +@rem Unless required by applicable law or agreed to in writing, software +@rem distributed under the License is distributed on an "AS IS" BASIS, +@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +@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 +@rem ########################################################################## +@rem +@rem Gradle startup script for Windows +@rem +@rem ########################################################################## + +@rem Set local scope for the variables with windows NT shell +if "%OS%"=="Windows_NT" setlocal + +set DIRNAME=%~dp0 +if "%DIRNAME%"=="" set DIRNAME=. +@rem This is normally unused +set APP_BASE_NAME=%~n0 +set APP_HOME=%DIRNAME% + +@rem Resolve any "." and ".." in APP_HOME to make it shorter. +for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi + +@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. +set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m" + +@rem Find java.exe +if defined JAVA_HOME goto findJavaFromJavaHome + +set JAVA_EXE=java.exe +%JAVA_EXE% -version >NUL 2>&1 +if %ERRORLEVEL% equ 0 goto execute + +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 + +:findJavaFromJavaHome +set JAVA_HOME=%JAVA_HOME:"=% +set JAVA_EXE=%JAVA_HOME%/bin/java.exe + +if exist "%JAVA_EXE%" goto execute + +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 + +:execute +@rem Setup the command line + +set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar + + +@rem Execute Gradle +"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %* + +:end +@rem End local scope for the variables with windows NT shell +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! +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 + +:omega diff --git a/clients/java/exp-client/settings.gradle b/clients/java/exp-client/settings.gradle new file mode 100644 index 00000000..178e0252 --- /dev/null +++ b/clients/java/exp-client/settings.gradle @@ -0,0 +1,13 @@ +/* + * This file was generated by the Gradle 'init' task. + * + * The settings file is used to specify which projects to include in your build. + * For more detailed information on multi-project builds, please refer to https://docs.gradle.org/8.9/userguide/multi_project_builds.html in the Gradle documentation. + */ + +plugins { + // Apply the foojay-resolver plugin to allow automatic download of JDKs + id("org.gradle.toolchains.foojay-resolver-convention") version "0.8.0" +} + +rootProject.name = "exp-client" diff --git a/clients/java/exp-client/src/main/java/example/Demo.java b/clients/java/exp-client/src/main/java/example/Demo.java new file mode 100644 index 00000000..20f56fbd --- /dev/null +++ b/clients/java/exp-client/src/main/java/example/Demo.java @@ -0,0 +1,112 @@ +package example; + +import java.io.IOException; +import java.util.concurrent.CountDownLatch; + +import exp_client.EXPClientException; +import exp_client.ExperimentationClient; +import jnr.ffi.Pointer; + +public class Demo { + + private static void callExperimentationClient() { + String tenant = "dev"; + + System.out.println("Experimentation Client"); + + System.out.println("---------------------"); + + ExperimentationClient wrapper = new ExperimentationClient(); + + int newClient; + try { + newClient = wrapper.exptNewClient(tenant, 1, "http://localhost:8080"); + System.out.println("New Experimentation client created successfully. Client ID: " + newClient); + } catch (EXPClientException e) { + System.err.println(e.getMessage()); + } + + System.out.println("---------------------"); + + Thread pollingThread = new Thread(() -> { + try { + wrapper.startPollingUpdate(tenant); + } catch (IOException e) { + System.err.println("Error in polling thread: " + e.getMessage()); + } + }); + + pollingThread.setDaemon(true); // Optional: Set as daemon thread + pollingThread.start(); + System.out.println("Started polling in a new thread for tenant: " + tenant); + + System.out.println("---------------------"); + + Pointer clientPtr; + try { + clientPtr = wrapper.getExptClient(tenant); + System.out.println("Result from getExptClient: " + clientPtr); + + System.out.println("---------------------"); + + String runningExperiments; + try { + runningExperiments = wrapper.getRunningExperiments(clientPtr); + System.out.println("runningExperiments: " + runningExperiments); + } catch (IOException e) { + System.err.println(e.getMessage()); + } + + System.out.println("---------------------"); + + String satisfiedVariants; + try { + satisfiedVariants = wrapper.getSatisfiedVariants(clientPtr, + "{\"os\": \"android\", \"client\": \"1mg\"}", null); + System.out.println("Satisfied Variants: " + satisfiedVariants); + } catch (IOException e) { + System.err.println(e.getMessage()); + } + + System.out.println("---------------------"); + + String filteredSatisfiedVariants; + try { + filteredSatisfiedVariants = wrapper.getFilteredSatisfiedVariants(clientPtr, + "{\"os\": \"android\", \"client\": \"1mg\"}", "hyperpay"); + System.out.println("Filtered Satisfied Variants: " + filteredSatisfiedVariants); + } catch (IOException e) { + System.err.println(e.getMessage()); + } + + System.out.println("---------------------"); + + String applicableVariants; + try { + applicableVariants = wrapper.getApplicableVariants(clientPtr, + "{\"os\": \"android\", \"client\": \"1mg\"}", (short) 9); + System.out.println("Applicable Variants: " + applicableVariants); + } catch (IOException e) { + System.err.println(e.getMessage()); + } + + System.out.println("---------------------"); + + } catch (IOException e) { + System.err.println(e.getMessage()); + } + } + + public static void main(String[] args) { + CountDownLatch latch = new CountDownLatch(1); + + try { + callExperimentationClient(); + latch.await(); // This will keep the main thread alive + } catch (InterruptedException e) { + System.err.println("Main thread interrupted: " + e.getMessage()); + } finally { + System.out.println("Application stopped."); + } + } +} diff --git a/clients/java/exp-client/src/main/java/exp_client/EXPClientException.java b/clients/java/exp-client/src/main/java/exp_client/EXPClientException.java new file mode 100644 index 00000000..a27bce4d --- /dev/null +++ b/clients/java/exp-client/src/main/java/exp_client/EXPClientException.java @@ -0,0 +1,7 @@ +package exp_client; + +public class EXPClientException extends Exception { + public EXPClientException(String message) { + super(message); + } +} diff --git a/clients/java/exp-client/src/main/java/exp_client/ExperimentationClient.java b/clients/java/exp-client/src/main/java/exp_client/ExperimentationClient.java new file mode 100644 index 00000000..1ae50a80 --- /dev/null +++ b/clients/java/exp-client/src/main/java/exp_client/ExperimentationClient.java @@ -0,0 +1,123 @@ +package exp_client; + +import java.io.IOException; + +import jnr.ffi.LibraryLoader; +import jnr.ffi.Pointer; + + +public class ExperimentationClient { + public interface RustLib { + int expt_new_client(String tenant, long updateFrequency, String hostName); + + void expt_free_client(Pointer ptr); + + Pointer expt_get_client(String tenant); + + String expt_last_error_message(); + + void expt_free_string(Pointer s); + + void expt_start_polling_update(String tenant); + + Pointer expt_get_applicable_variant(Pointer clientPtr, String context, short toss); + + Pointer expt_get_satisfied_experiments(Pointer clientPtr, String context, String filter_prefix); + + Pointer expt_get_filtered_satisfied_experiments(Pointer clientPtr, String context, String filter_prefix); + + Pointer expt_get_running_experiments(Pointer clientPtr); + } + + public static RustLib rustLib; + + public ExperimentationClient() { + String libraryName = "experimentation_client"; + String libraryPath = System.getenv("SUPERPOSITION_LIB_PATH"); + System.out.println("libraryPath" + libraryPath); + System.setProperty("jnr.ffi.library.path", libraryPath); + ExperimentationClient.rustLib = LibraryLoader.create(RustLib.class).load(libraryName); + } + + public int exptNewClient(String tenant, long updateFrequency, String hostName) throws EXPClientException { + int result = rustLib.expt_new_client(tenant, updateFrequency, hostName); + if (result > 0) { + String errorMessage = rustLib.expt_last_error_message(); + throw new EXPClientException("Failed to create new Experimentation client: " + errorMessage); + } + return result; + } + + public Pointer getExptClient(String tenant) throws IOException { + Pointer clientPtr = rustLib.expt_get_client(tenant); + return clientPtr; + } + + public void startPollingUpdate(String tenant) throws IOException { + rustLib.expt_start_polling_update(tenant); + } + + public String getApplicableVariants (Pointer clientPtr, String context, short toss) throws IOException { + Pointer result = rustLib.expt_get_applicable_variant(clientPtr, context, toss); + if (result == null) { + String errorMessage = rustLib.expt_last_error_message(); + throw new IOException("Failed to get applicable variants for the experiment: " + errorMessage); + } + String applicableVariants = getStringAndFree(result); + return applicableVariants; + } + + public String getSatisfiedVariants(Pointer clientPtr, String context, String filter_prefix) throws IOException { + Pointer result = rustLib.expt_get_satisfied_experiments(clientPtr, context, filter_prefix); + if (result == null) { + String errorMessage = rustLib.expt_last_error_message(); + throw new IOException("Failed to get satisfied variants for the experiment: " + errorMessage); + } + String satisfiedVariants = getStringAndFree(result); + return satisfiedVariants; + } + + public String getFilteredSatisfiedVariants(Pointer clientPtr, String context, String filter_prefix) throws IOException { + Pointer result = rustLib.expt_get_filtered_satisfied_experiments(clientPtr, context, filter_prefix); + if (result == null) { + String errorMessage = rustLib.expt_last_error_message(); + throw new IOException("Failed to get filtered satisfied variants for the experiment: " + errorMessage); + } + String filteredSatisfiedVariants = getStringAndFree(result); + return filteredSatisfiedVariants; + } + + public String getRunningExperiments(Pointer clientPtr) throws IOException { + Pointer result = rustLib.expt_get_running_experiments(clientPtr); + if (result == null) { + String errorMessage = rustLib.expt_last_error_message(); + throw new IOException("Failed to get the running variants for the experiment: " + errorMessage); + } + String runningExperiments = getStringAndFree(result); + return runningExperiments; + } + + public String getLastError() throws IOException { + String errorMessage = rustLib.expt_last_error_message(); + if (errorMessage != null) { + return errorMessage; + } else { + return "No error"; + } + } + + public void freeString(Pointer ptr) { + rustLib.expt_free_string(ptr); + } + + public String getStringAndFree(Pointer ptr) { + if (ptr == null) { + return null; + } + try { + return ptr.getString(0); + } finally { + freeString(ptr); + } + } +}