Initial snapshot - OpenTelemetry demo 2.1.3 -f

12 files changed, 607 insertions, 0 deletions

diff --git a/src/fraud-detection/.dockerignore b/src/fraud-detection/.dockerignore
new file mode 100644
index 0000000..1d1fe94
--- /dev/null
+++ b/src/fraud-detection/.dockerignore
@@ -0,0 +1 @@
+Dockerfile
\ No newline at end of file
diff --git a/src/fraud-detection/Dockerfile b/src/fraud-detection/Dockerfile
new file mode 100644
index 0000000..60ed4b4
--- /dev/null
+++ b/src/fraud-detection/Dockerfile
@@ -0,0 +1,26 @@
+# Copyright The OpenTelemetry Authors
+# SPDX-License-Identifier: Apache-2.0
+
+
+FROM --platform=${BUILDPLATFORM} gradle:8-jdk17 AS builder
+
+WORKDIR /usr/src/app/
+
+COPY ./src/fraud-detection/ ./
+COPY ./pb/ ./src/main/proto/
+
+RUN gradle shadowJar
+
+# -----------------------------------------------------------------------------
+
+FROM gcr.io/distroless/java17-debian12:nonroot
+
+ARG OTEL_JAVA_AGENT_VERSION
+WORKDIR /usr/src/app/
+
+ADD --chmod=644 https://github.com/open-telemetry/opentelemetry-java-instrumentation/releases/download/v$OTEL_JAVA_AGENT_VERSION/opentelemetry-javaagent.jar /usr/src/app/opentelemetry-javaagent.jar
+ENV JAVA_TOOL_OPTIONS=-javaagent:/usr/src/app/opentelemetry-javaagent.jar
+
+COPY --from=builder /usr/src/app/build/libs/fraud-detection-1.0-all.jar fraud-detection-1.0-all.jar
+
+ENTRYPOINT [ "java", "-jar", "fraud-detection-1.0-all.jar" ]
diff --git a/src/fraud-detection/README.md b/src/fraud-detection/README.md
new file mode 100644
index 0000000..c844776
--- /dev/null
+++ b/src/fraud-detection/README.md
@@ -0,0 +1,21 @@
+# Fraud Detection Service
+
+This service receives new orders by a Kafka topic and returns cases which are
+suspected of fraud.
+
+## Local Build
+
+To build the protos and the service binary, run from the repo root:
+
+```sh
+cp -r ../../pb/ src/main/proto/
+./gradlew shadowJar
+```
+
+## Docker Build
+
+To build using Docker run from the repo root:
+
+```sh
+docker build -f ./src/fraud-detection/Dockerfile .
+```
diff --git a/src/fraud-detection/build.gradle.kts b/src/fraud-detection/build.gradle.kts
new file mode 100644
index 0000000..6c94e62
--- /dev/null
+++ b/src/fraud-detection/build.gradle.kts
@@ -0,0 +1,101 @@
+
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+import com.google.protobuf.gradle.*
+import org.jetbrains.kotlin.gradle.dsl.JvmTarget
+
+plugins {
+    kotlin("jvm") version "2.2.20"
+    application
+    id("java")
+    id("idea")
+    id("com.google.protobuf") version "0.9.5"
+    id("com.github.johnrengelman.shadow") version "8.1.1"
+}
+
+group = "io.opentelemetry"
+version = "1.0"
+
+
+val grpcVersion = "1.75.0"
+val protobufVersion = "4.32.1"
+
+
+repositories {
+    mavenCentral()
+    gradlePluginPortal()
+}
+
+
+
+dependencies {
+    implementation("com.google.protobuf:protobuf-java:${protobufVersion}")
+    testImplementation(kotlin("test"))
+    implementation(kotlin("script-runtime"))
+    implementation("org.apache.kafka:kafka-clients:4.1.0")
+    implementation("com.google.api.grpc:proto-google-common-protos:2.61.2")
+    implementation("io.grpc:grpc-protobuf:${grpcVersion}")
+    implementation("io.grpc:grpc-stub:${grpcVersion}")
+    implementation("io.grpc:grpc-netty:${grpcVersion}")
+    implementation("io.grpc:grpc-services:${grpcVersion}")
+    implementation("io.opentelemetry:opentelemetry-api:1.54.1")
+    implementation("io.opentelemetry:opentelemetry-sdk:1.54.1")
+    implementation("io.opentelemetry:opentelemetry-extension-annotations:1.18.0")
+    implementation("org.apache.logging.log4j:log4j-core:2.25.2")
+    implementation("org.slf4j:slf4j-api:2.0.17")
+    implementation("com.google.protobuf:protobuf-kotlin:${protobufVersion}")
+    implementation("dev.openfeature:sdk:1.18.1")
+    implementation("dev.openfeature.contrib.providers:flagd:0.11.15")
+
+    if (JavaVersion.current().isJava9Compatible) {
+        // Workaround for @javax.annotation.Generated
+        // see: https://github.com/grpc/grpc-java/issues/3633
+        implementation("javax.annotation:javax.annotation-api:1.3.2")
+    }
+}
+
+tasks {
+    shadowJar {
+        mergeServiceFiles()
+    }
+}
+
+tasks.test {
+    useJUnitPlatform()
+}
+
+kotlin {
+  compilerOptions {
+    jvmTarget.set(JvmTarget.JVM_17)
+  }
+}
+
+protobuf {
+    protoc {
+        artifact = "com.google.protobuf:protoc:${protobufVersion}"
+    }
+    plugins {
+
+        id("grpc") {
+            artifact = "io.grpc:protoc-gen-grpc-java:${grpcVersion}"
+        }
+    }
+    generateProtoTasks {
+        ofSourceSet("main").forEach {
+            it.plugins {
+                // Apply the "grpc" plugin whose spec is defined above, without
+                // options. Note the braces cannot be omitted, otherwise the
+                // plugin will not be added. This is because of the implicit way
+                // NamedDomainObjectContainer binds the methods.
+                id("grpc") { }
+            }
+        }
+    }
+}
+
+application {
+    mainClass.set("frauddetection.MainKt")
+}
+
+tasks.jar {
+    manifest.attributes["Main-Class"] = "frauddetection.MainKt"
+}
diff --git a/src/fraud-detection/gradle.properties b/src/fraud-detection/gradle.properties
new file mode 100644
index 0000000..7fc6f1f
--- /dev/null
+++ b/src/fraud-detection/gradle.properties
@@ -0,0 +1 @@
+kotlin.code.style=official
diff --git a/src/fraud-detection/gradle/wrapper/gradle-wrapper.jar b/src/fraud-detection/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..7f93135
--- /dev/null
+++ b/src/fraud-detection/gradle/wrapper/gradle-wrapper.jar
diff --git a/src/fraud-detection/gradle/wrapper/gradle-wrapper.properties b/src/fraud-detection/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..e18bc25
--- /dev/null
+++ b/src/fraud-detection/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.12.1-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/src/fraud-detection/gradlew b/src/fraud-detection/gradlew
new file mode 100755
index 0000000..1aa94a4
--- /dev/null
+++ b/src/fraud-detection/gradlew
@@ -0,0 +1,249 @@
+#!/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.
+#
+
+##############################################################################
+#
+#   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/subprojects/plugins/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 "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&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/src/fraud-detection/gradlew.bat b/src/fraud-detection/gradlew.bat
new file mode 100644
index 0000000..93e3f59
--- /dev/null
+++ b/src/fraud-detection/gradlew.bat
@@ -0,0 +1,92 @@
+@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
+
+@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.
+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.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+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.
+
+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/src/fraud-detection/settings.gradle.kts b/src/fraud-detection/settings.gradle.kts
new file mode 100644
index 0000000..d9c4193
--- /dev/null
+++ b/src/fraud-detection/settings.gradle.kts
@@ -0,0 +1,3 @@
+
+rootProject.name = "fraud-detection"
+
diff --git a/src/fraud-detection/src/main/kotlin/frauddetection/main.kt b/src/fraud-detection/src/main/kotlin/frauddetection/main.kt
new file mode 100644
index 0000000..bcb480a
--- /dev/null
+++ b/src/fraud-detection/src/main/kotlin/frauddetection/main.kt
@@ -0,0 +1,88 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package frauddetection
+
+import org.apache.kafka.clients.consumer.ConsumerConfig.*
+import org.apache.kafka.clients.consumer.KafkaConsumer
+import org.apache.kafka.common.serialization.ByteArrayDeserializer
+import org.apache.kafka.common.serialization.StringDeserializer
+import org.apache.logging.log4j.LogManager
+import org.apache.logging.log4j.Logger
+import oteldemo.Demo.*
+import java.time.Duration.ofMillis
+import java.util.*
+import kotlin.system.exitProcess
+import dev.openfeature.contrib.providers.flagd.FlagdOptions
+import dev.openfeature.contrib.providers.flagd.FlagdProvider
+import dev.openfeature.sdk.Client
+import dev.openfeature.sdk.EvaluationContext
+import dev.openfeature.sdk.ImmutableContext
+import dev.openfeature.sdk.Value
+import dev.openfeature.sdk.OpenFeatureAPI
+
+const val topic = "orders"
+const val groupID = "fraud-detection"
+
+private val logger: Logger = LogManager.getLogger(groupID)
+
+fun main() {
+    val options = FlagdOptions.builder()
+    .withGlobalTelemetry(true)
+    .build()
+    val flagdProvider = FlagdProvider(options)
+    OpenFeatureAPI.getInstance().setProvider(flagdProvider)
+
+    val props = Properties()
+    props[KEY_DESERIALIZER_CLASS_CONFIG] = StringDeserializer::class.java.name
+    props[VALUE_DESERIALIZER_CLASS_CONFIG] = ByteArrayDeserializer::class.java.name
+    props[GROUP_ID_CONFIG] = groupID
+    val bootstrapServers = System.getenv("KAFKA_ADDR")
+    if (bootstrapServers == null) {
+        println("KAFKA_ADDR is not supplied")
+        exitProcess(1)
+    }
+    props[BOOTSTRAP_SERVERS_CONFIG] = bootstrapServers
+    val consumer = KafkaConsumer<String, ByteArray>(props).apply {
+        subscribe(listOf(topic))
+    }
+
+    var totalCount = 0L
+
+    consumer.use {
+        while (true) {
+            totalCount = consumer
+                .poll(ofMillis(100))
+                .fold(totalCount) { accumulator, record ->
+                    val newCount = accumulator + 1
+                    if (getFeatureFlagValue("kafkaQueueProblems") > 0) {
+                        logger.info("FeatureFlag 'kafkaQueueProblems' is enabled, sleeping 1 second")
+                        Thread.sleep(1000)
+                    }
+                    val orders = OrderResult.parseFrom(record.value())
+                    logger.info("Consumed record with orderId: ${orders.orderId}, and updated total count to: $newCount")
+                    newCount
+                }
+        }
+    }
+}
+
+/**
+* Retrieves the status of a feature flag from the Feature Flag service.
+*
+* @param ff The name of the feature flag to retrieve.
+* @return `true` if the feature flag is enabled, `false` otherwise or in case of errors.
+*/
+fun getFeatureFlagValue(ff: String): Int {
+    val client = OpenFeatureAPI.getInstance().client
+    // TODO: Plumb the actual session ID from the frontend via baggage?
+    val uuid = UUID.randomUUID()
+
+    val clientAttrs = mutableMapOf<String, Value>()
+    clientAttrs["session"] = Value(uuid.toString())
+    client.evaluationContext = ImmutableContext(clientAttrs)
+    val intValue = client.getIntegerValue(ff, 0)
+    return intValue
+}
diff --git a/src/fraud-detection/src/main/resources/log4j2.xml b/src/fraud-detection/src/main/resources/log4j2.xml
new file mode 100644
index 0000000..db5cb39
--- /dev/null
+++ b/src/fraud-detection/src/main/resources/log4j2.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+Copyright The OpenTelemetry Authors
+SPDX-License-Identifier: Apache-2.0
+-->
+
+<Configuration status="WARN">
+    <Appenders>
+        <Console name="STDOUT" target="SYSTEM_OUT">
+            <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss} - %logger{36} - %msg trace_id=%X{trace_id} span_id=%X{span_id} trace_flags=%X{trace_flags} %n"/>
+        </Console>
+    </Appenders>
+    <Loggers>
+        <Root level="INFO">
+            <AppenderRef ref="STDOUT"/>
+        </Root>
+    </Loggers>
+</Configuration>