diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..fd00d92
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,39 @@
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..43f0454
--- /dev/null
+++ b/README.md
@@ -0,0 +1,233 @@
+# Spring Security Exception Handler
+
+A flexible library for handling Spring Security exceptions with customizable response formats, supporting both REST and GraphQL APIs.
+
+---
+
+## Table of Contents
+
+1. [Overview](#overview)
+2. [Project Structure](#project-structure)
+3. [Getting Started](#getting-started)
+    - [Installation](#installation)
+    - [Basic Usage](#basic-usage)
+4. [Implementation Details](#implementation-details)
+
+---
+
+## Overview
+
+By default, Spring Security uses its own `ExceptionTranslationFilter` which converts `AuthenticationException` and `AccessDeniedException` into empty responses with 401 and 403 status codes respectively. While this behavior is sufficient for many applications, there are cases when such behavior is not desired.
+
+For example, in a microservice GraphQL federation environment, there is more value in returning JSON in a GraphQL-compatible format, allowing you to see access denied errors rather than just internal server errors.
+
+**Spring Security Exception Handler** provides a clean and flexible way to handle security exceptions in Spring applications. It allows you to customize how authentication and authorization exceptions are handled and presented to clients, with built-in support for both standard REST APIs and GraphQL endpoints.
+
+### Key Features
+
+- Custom handling of Spring Security exceptions (`AuthenticationException` and `AccessDeniedException`)
+- URL pattern-based routing of exceptions to appropriate handlers
+- Built-in support for REST and GraphQL response formats
+- Flexible builder API for creating custom exception handlers
+- Spring Boot auto-configuration with sensible defaults
+- Fully customizable through application properties
+
+---
+
+## Project Structure
+
+This project consists of two main libraries:
+
+- **`spring-security-exception-handler`** - Core library with exception handling logic and builder API
+- **`spring-security-exception-handler-starter`** - Spring Boot starter with auto-configuration and property support
+
+---
+
+## Getting Started
+
+### Installation
+
+Add the starter dependency to your Spring Boot project:
+
+#### Gradle
+```kotlin
+implementation("dev.clutcher.spring-security:spring-security-exception-handler-starter:1.0.0")
+```
+
+#### Maven
+```xml
+<dependency>
+    <groupId>dev.clutcher.spring-security</groupId>
+    <artifactId>spring-security-exception-handler-starter</artifactId>
+    <version>1.0.0</version>
+</dependency>
+```
+
+### Basic Usage
+
+The library provides auto-configuration that automatically sets up default exception handlers for both REST and GraphQL endpoints. Simply add the starter dependency to your project and the library will automatically inject a preconfigured instance of `SpringSecurityExceptionFilterConfigurer` through Spring Boot's auto-configuration mechanism.
+
+The auto-configuration is enabled through `spring.factories` and `SpringSecurityExceptionHandlerAutoConfiguration`, which automatically registers the necessary components without requiring any manual configuration.
+
+That's it! The library will automatically handle Spring Security exceptions with sensible defaults - no additional configuration required.
+
+#### Manual Filter Configuration
+
+If you need more control over the filter configuration or prefer explicit setup, you can manually create and configure the `SpringSecurityExceptionFilter` bean:
+
+```java
+@Configuration
+@EnableWebSecurity
+public class SecurityConfig {
+
+    @Autowired
+    private List<SpringSecurityExceptionHandler> exceptionHandlers;
+
+    @Bean
+    public SpringSecurityExceptionFilter springSecurityExceptionFilter() {
+        return new SpringSecurityExceptionFilter(exceptionHandlers);
+    }
+
+    @Bean
+    public SecurityFilterChain filterChain(HttpSecurity http, 
+                                         SpringSecurityExceptionFilter exceptionFilter) throws Exception {
+        return http
+            .authorizeHttpRequests(authorize -> authorize
+                .requestMatchers("/public/**").permitAll()
+                .anyRequest().authenticated()
+            )
+            .addFilterBefore(exceptionFilter, ExceptionTranslationFilter.class)
+            .formLogin(withDefaults())
+            .build();
+    }
+}
+```
+
+This approach gives you full control over when and how the filter is added to the security filter chain.
+
+#### Property-Based Configuration
+
+Configure exception handlers through application properties:
+
+```yaml
+dev:
+  clutcher:
+    security:
+      handlers:
+        default:
+          enabled: true
+          urls: ["/**"]
+          order: 100
+        graphql:
+          enabled: true
+          urls: ["/graphql"]
+          order: 0
+        custom:
+          enabled: true
+          urls: ["/api/v2/**"]
+          order: 50
+```
+
+#### Custom Exception Handler
+
+Create custom exception handlers for specific URL patterns:
+
+```java
+@Configuration
+public class CustomExceptionHandlerConfig {
+
+    @Bean
+    public SpringSecurityExceptionHandler apiV2ExceptionHandler() {
+        return SpringSecurityExceptionHandlerBuilder.builder()
+            .canHandle(new UrlMatchingPredicate(List.of("/api/v2/**")))
+            .handle(new ErrorResponseWritingConsumer(exception -> {
+                if (exception instanceof AuthenticationException) {
+                    return new ErrorResponseWritingConsumer.ErrorResponse(
+                        HttpServletResponse.SC_UNAUTHORIZED,
+                        "{\"error\":\"Authentication required\",\"code\":\"AUTH_REQUIRED\"}"
+                    );
+                }
+                if (exception instanceof AccessDeniedException) {
+                    return new ErrorResponseWritingConsumer.ErrorResponse(
+                        HttpServletResponse.SC_FORBIDDEN,
+                        "{\"error\":\"Access denied\",\"code\":\"ACCESS_DENIED\"}"
+                    );
+                }
+                return new ErrorResponseWritingConsumer.ErrorResponse(
+                    HttpServletResponse.SC_INTERNAL_SERVER_ERROR,
+                    "{\"error\":\"Internal server error\"}"
+                );
+            }))
+            .order(50)
+            .build();
+    }
+}
+```
+
+## Implementation Details
+
+The Spring Security Exception Handler library is built around several key components that work together to provide flexible exception handling for Spring Security applications.
+
+### Core Components
+
+The library consists of the following main interfaces and classes:
+
+- **`SpringSecurityExceptionFilter`** - Servlet filter that intercepts Spring Security exceptions and delegates to registered handlers.
+- **`SpringSecurityExceptionHandler`** - Main interface for handling security exceptions. Implements `Ordered` to support priority-based handler selection.
+- **`SpringSecurityExceptionHandlerBuilder`** - Fluent builder API for creating custom exception handlers with predicates and response writers.
+- **`UrlMatchingPredicate`** - Predicate implementation for URL pattern matching using Spring's `AntPathMatcher`.
+- **`ErrorResponseWritingConsumer`** - Consumer for writing structured error responses with customizable status codes and content.
+- **`ExceptionMappingFunctions`** - Utility class providing pre-built exception mapping functions for common use cases.
+
+### Exception Handling Flow
+
+The exception handling process follows this sequence:
+
+1. Spring Security's authentication or authorization mechanisms throw an `AuthenticationException` or `AccessDeniedException`
+2. `SpringSecurityExceptionFilter` intercepts the exception before it reaches Spring Security's default `ExceptionTranslationFilter`
+3. The filter iterates through all registered `SpringSecurityExceptionHandler` beans in priority order (based on the `getOrder()` method)
+4. The first handler that returns `true` from its `canHandle(HttpServletRequest)` method processes the exception
+5. The selected handler writes a custom response to the `HttpServletResponse` using its configured response writer
+6. If no handler can process the request, the exception continues to Spring Security's default behavior
+
+### Auto-Configuration
+
+The Spring Boot starter provides auto-configuration through `SpringSecurityExceptionHandlerAutoConfiguration`, which:
+
+- Registers default exception handlers for common scenarios (REST APIs, GraphQL endpoints)
+- Configures handlers based on application properties under the `dev.clutcher.security` namespace
+- Uses conditional beans to avoid conflicts with custom handler configurations
+- Integrates seamlessly with Spring Security's filter chain through `SpringSecurityExceptionFilterConfigurer`
+
+### Property-Based Configuration
+
+The library supports comprehensive configuration through application properties:
+
+```yaml
+dev:
+  clutcher:
+    security:
+      handlers:
+        default:
+          enabled: true          # Enable/disable the handler
+          urls: ["/**"]          # URL patterns to match
+          order: 100             # Handler priority (lower = higher priority)
+        graphql:
+          enabled: true
+          urls: ["/graphql", "/graphiql"]
+          order: 0
+```
+
+Each handler configuration supports:
+- **enabled** - Boolean flag to enable/disable the handler
+- **urls** - List of URL patterns using Ant-style matching
+- **order** - Integer defining handler priority (lower values have higher priority)
+
+### Extensibility
+
+The library is designed for extensibility through several extension points:
+
+- **Custom Predicates** - Implement custom logic for determining when a handler should process a request
+- **Custom Response Writers** - Create specialized response formats (XML, custom JSON structures, etc.)
+- **Handler Composition** - Combine multiple handlers with different priorities and URL patterns
+- **Integration Points** - Leverage Spring Boot's conditional configuration to adapt to different application contexts
diff --git a/build.gradle.kts b/build.gradle.kts
new file mode 100644
index 0000000..3e20856
--- /dev/null
+++ b/build.gradle.kts
@@ -0,0 +1,162 @@
+import org.jreleaser.gradle.plugin.JReleaserExtension
+import org.jreleaser.model.Http
+
+plugins {
+    id("java")
+    id("io.spring.dependency-management") version "1.1.7"
+
+    id("maven-publish")
+    id("signing")
+    id("org.jreleaser") version "1.17.0"
+}
+
+extra["springBootVersion"] = "3.5.3"
+
+allprojects {
+    group = "dev.clutcher.spring-security"
+    version = "1.0.0"
+}
+
+configureJReleaser()
+
+subprojects {
+    apply(plugin = "java")
+    apply(plugin = "io.spring.dependency-management")
+
+    apply(plugin = "maven-publish")
+    apply(plugin = "signing")
+
+    java {
+        toolchain {
+            languageVersion = JavaLanguageVersion.of(17)
+        }
+
+        withSourcesJar()
+        withJavadocJar()
+    }
+
+    repositories {
+        mavenCentral()
+    }
+
+    dependencies {
+        testImplementation("org.junit.jupiter:junit-jupiter")
+    }
+
+    dependencyManagement {
+        imports {
+            mavenBom("org.springframework.boot:spring-boot-dependencies:${property("springBootVersion")}")
+        }
+    }
+
+    configurePublishing()
+
+    signing {
+        useGpgCmd()
+        sign(publishing.publications["default"])
+    }
+
+    tasks.test {
+        useJUnitPlatform()
+    }
+}
+
+fun Project.configurePublishing() {
+    publishing {
+        publications {
+            create<MavenPublication>("default") {
+
+                from(components["java"])
+
+                pom {
+                    name.set(project.name)
+                    description.set(provider { project.description })
+
+                    url.set("https://github.com/clutcher/spring-modulith-module-archunit")
+
+                    licenses {
+                        license {
+                            name.set("MIT License")
+                            url.set("https://github.com/clutcher/spring-modulith-module-archunit/blob/main/LICENSE")
+                            distribution.set("repo")
+                        }
+                    }
+
+                    developers {
+                        developer {
+                            id.set("clutcher")
+                            name.set("Igor Zarvanskyi")
+                            email.set("iclutcher@gmail.com")
+                        }
+                    }
+
+                    scm {
+                        connection.set("scm:git:git://github.com/clutcher/spring-modulith-module-archunit.git")
+                        developerConnection.set("scm:git:ssh://github.com/clutcher/spring-modulith-module-archunit.git")
+                        url.set("https://github.com/clutcher/spring-modulith-module-archunit")
+                    }
+                }
+            }
+        }
+
+        repositories {
+            maven {
+                name = "RootStaging"
+                url = uri(rootProject.layout.buildDirectory.dir("staging-deploy"))
+            }
+        }
+
+    }
+}
+
+fun Project.configureJReleaser() {
+    configure<JReleaserExtension> {
+
+        release {
+            github {
+                repoOwner = "clutcher"
+            }
+        }
+
+        deploy {
+            maven {
+                mavenCentral {
+                    create("sonatype") {
+                        setActive("ALWAYS")
+                        sign.set(false)
+
+                        url.set("https://central.sonatype.com/api/v1/publisher")
+                        authorization.set(Http.Authorization.BEARER)
+
+                        username.set(System.getenv("MAVENCENTRAL_USERNAME"))
+                        password.set(System.getenv("MAVENCENTRAL_PASSWORD"))
+
+                        stagingRepository("build/staging-deploy")
+                    }
+                }
+            }
+        }
+    }
+
+    tasks.named("publish") {
+        // Add dependencies on each subproject's publish task
+        subprojects.forEach { subproject ->
+            dependsOn(subproject.tasks.named("publish"))
+        }
+    }
+
+    tasks.named("publishToMavenLocal") {
+        // Add dependencies on each subproject's publish task
+        subprojects.forEach { subproject ->
+            dependsOn(subproject.tasks.named("publishToMavenLocal"))
+        }
+    }
+
+    tasks.named("jreleaserFullRelease").configure {
+        dependsOn("publish")
+    }
+
+    tasks.named("jreleaserDeploy").configure {
+        dependsOn("publish")
+    }
+}
\ No newline at end of file
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..1b33c55
Binary files /dev/null and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..6074fb8
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,7 @@
+distributionBase        = GRADLE_USER_HOME
+distributionPath        = wrapper/dists
+distributionUrl         = https\://services.gradle.org/distributions/gradle-8.14.2-bin.zip
+networkTimeout          = 10000
+validateDistributionUrl = true
+zipStoreBase            = GRADLE_USER_HOME
+zipStorePath            = wrapper/dists
diff --git a/gradlew b/gradlew
new file mode 100644
index 0000000..b26d411
--- /dev/null
+++ b/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 "$JAVACMD" "$@"
\ No newline at end of file
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 0000000..f46bb52
--- /dev/null
+++ b/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
\ No newline at end of file
diff --git a/settings.gradle.kts b/settings.gradle.kts
new file mode 100644
index 0000000..c194569
--- /dev/null
+++ b/settings.gradle.kts
@@ -0,0 +1,5 @@
+rootProject.name = "spring-security-exception-handler"
+include(
+    "spring-security-exception-handler",
+    "spring-security-exception-handler-starter"
+)
\ No newline at end of file
diff --git a/spring-security-exception-handler-starter/build.gradle.kts b/spring-security-exception-handler-starter/build.gradle.kts
new file mode 100644
index 0000000..d9102c5
--- /dev/null
+++ b/spring-security-exception-handler-starter/build.gradle.kts
@@ -0,0 +1,12 @@
+plugins {
+    id("java")
+    id("java-library")
+}
+
+dependencies {
+    api(project(":spring-security-exception-handler"))
+    implementation("org.springframework.boot:spring-boot-starter-security")
+    implementation("org.springframework.boot:spring-boot-autoconfigure")
+
+    implementation("jakarta.servlet:jakarta.servlet-api")
+}
\ No newline at end of file
diff --git a/spring-security-exception-handler-starter/src/main/java/dev/clutcher/security/starter/SecurityExceptionHandlerProperties.java b/spring-security-exception-handler-starter/src/main/java/dev/clutcher/security/starter/SecurityExceptionHandlerProperties.java
new file mode 100644
index 0000000..6eabd55
--- /dev/null
+++ b/spring-security-exception-handler-starter/src/main/java/dev/clutcher/security/starter/SecurityExceptionHandlerProperties.java
@@ -0,0 +1,75 @@
+package dev.clutcher.security.starter;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+@ConfigurationProperties(prefix = "dev.clutcher.security")
+public class SecurityExceptionHandlerProperties {
+
+    private Map<String, HandlerConfig> handlers = createDefaultHandlers();
+
+    public Map<String, HandlerConfig> getHandlers() {
+        return handlers;
+    }
+
+    public void setHandlers(Map<String, HandlerConfig> handlers) {
+        Map<String, HandlerConfig> mergedHandlers = createDefaultHandlers();
+        if (handlers != null) {
+            mergedHandlers.putAll(handlers);
+        }
+        this.handlers = mergedHandlers;
+    }
+
+    private Map<String, HandlerConfig> createDefaultHandlers() {
+        Map<String, HandlerConfig> defaults = new HashMap<>();
+        
+        //Default handler
+        HandlerConfig defaultHandler = new HandlerConfig();
+        defaultHandler.setEnabled(true);
+        defaultHandler.setUrls(List.of("/**"));
+        defaultHandler.setOrder(100);
+        defaults.put("default", defaultHandler);
+        
+        //GraphQL handler
+        HandlerConfig graphqlHandler = new HandlerConfig();
+        graphqlHandler.setEnabled(true);
+        graphqlHandler.setUrls(List.of("/graphql"));
+        graphqlHandler.setOrder(0);
+        defaults.put("graphql", graphqlHandler);
+        
+        return defaults;
+    }
+
+    public static class HandlerConfig {
+        private boolean enabled = false;
+        private List<String> urls = List.of();
+        private int order = 100;
+
+        public boolean isEnabled() {
+            return enabled;
+        }
+
+        public void setEnabled(boolean enabled) {
+            this.enabled = enabled;
+        }
+
+        public List<String> getUrls() {
+            return urls;
+        }
+
+        public void setUrls(List<String> urls) {
+            this.urls = urls;
+        }
+
+        public int getOrder() {
+            return order;
+        }
+
+        public void setOrder(int order) {
+            this.order = order;
+        }
+    }
+}
\ No newline at end of file
diff --git a/spring-security-exception-handler-starter/src/main/java/dev/clutcher/security/starter/SpringSecurityExceptionFilterConfigurer.java b/spring-security-exception-handler-starter/src/main/java/dev/clutcher/security/starter/SpringSecurityExceptionFilterConfigurer.java
new file mode 100644
index 0000000..559cb7e
--- /dev/null
+++ b/spring-security-exception-handler-starter/src/main/java/dev/clutcher/security/starter/SpringSecurityExceptionFilterConfigurer.java
@@ -0,0 +1,15 @@
+package dev.clutcher.security.starter;
+
+import dev.clutcher.security.filter.SpringSecurityExceptionFilter;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.configurers.AbstractHttpConfigurer;
+import org.springframework.security.web.access.ExceptionTranslationFilter;
+
+public class SpringSecurityExceptionFilterConfigurer extends AbstractHttpConfigurer<SpringSecurityExceptionFilterConfigurer, HttpSecurity> {
+
+    @Override
+    public void configure(HttpSecurity http) {
+        SpringSecurityExceptionFilter springSecurityExceptionFilter = new SpringSecurityExceptionFilter();
+        http.addFilterAfter(this.postProcess(springSecurityExceptionFilter), ExceptionTranslationFilter.class);
+    }
+}
diff --git a/spring-security-exception-handler-starter/src/main/java/dev/clutcher/security/starter/SpringSecurityExceptionHandlerAutoConfiguration.java b/spring-security-exception-handler-starter/src/main/java/dev/clutcher/security/starter/SpringSecurityExceptionHandlerAutoConfiguration.java
new file mode 100644
index 0000000..7fb70cd
--- /dev/null
+++ b/spring-security-exception-handler-starter/src/main/java/dev/clutcher/security/starter/SpringSecurityExceptionHandlerAutoConfiguration.java
@@ -0,0 +1,64 @@
+package dev.clutcher.security.starter;
+
+import dev.clutcher.security.handler.SpringSecurityExceptionHandler;
+import dev.clutcher.security.handler.SpringSecurityExceptionHandlerBuilder;
+import dev.clutcher.security.handler.functions.ErrorResponseWritingConsumer;
+import dev.clutcher.security.handler.functions.ExceptionMappingFunctions;
+import dev.clutcher.security.handler.functions.UrlMatchingPredicate;
+import org.springframework.boot.autoconfigure.AutoConfiguration;
+import org.springframework.boot.autoconfigure.AutoConfigureAfter;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.boot.autoconfigure.security.servlet.SecurityAutoConfiguration;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.context.annotation.Bean;
+
+@AutoConfiguration
+@AutoConfigureAfter(SecurityAutoConfiguration.class)
+@EnableConfigurationProperties(SecurityExceptionHandlerProperties.class)
+public class SpringSecurityExceptionHandlerAutoConfiguration {
+
+    @Bean
+    @ConditionalOnMissingBean(name = "defaultSecurityExceptionHandler")
+    public SpringSecurityExceptionHandler defaultSecurityExceptionHandler(SecurityExceptionHandlerProperties properties) {
+        SecurityExceptionHandlerProperties.HandlerConfig config = properties.getHandlers().get("default");
+
+        if (isEnabledHandler(config)) {
+            return null;
+        }
+
+        return SpringSecurityExceptionHandlerBuilder.builder()
+                                                    .canHandle(new UrlMatchingPredicate(config.getUrls()))
+                                                    .handle(
+                                                            new ErrorResponseWritingConsumer(
+                                                                    ExceptionMappingFunctions.jsonBodyExceptionMapping()
+                                                            )
+                                                    )
+                                                    .order(config.getOrder())
+                                                    .build();
+    }
+
+    @Bean
+    @ConditionalOnMissingBean(name = "graphqlSecurityExceptionHandler")
+    public SpringSecurityExceptionHandler graphqlSecurityExceptionHandler(SecurityExceptionHandlerProperties properties) {
+        SecurityExceptionHandlerProperties.HandlerConfig config = properties.getHandlers().get("graphql");
+
+        if (isEnabledHandler(config)) {
+            return null;
+        }
+
+        return SpringSecurityExceptionHandlerBuilder.builder()
+                                                    .canHandle(new UrlMatchingPredicate(config.getUrls()))
+                                                    .handle(
+                                                            new ErrorResponseWritingConsumer(
+                                                                    ExceptionMappingFunctions.graphqlJsonBodyExceptionMapping()
+                                                            )
+                                                    )
+                                                    .order(config.getOrder())
+                                                    .build();
+    }
+
+    private boolean isEnabledHandler(SecurityExceptionHandlerProperties.HandlerConfig config) {
+        return config == null || !config.isEnabled();
+    }
+
+}
\ No newline at end of file
diff --git a/spring-security-exception-handler-starter/src/main/resources/META-INF/spring.factories b/spring-security-exception-handler-starter/src/main/resources/META-INF/spring.factories
new file mode 100644
index 0000000..dcff23e
--- /dev/null
+++ b/spring-security-exception-handler-starter/src/main/resources/META-INF/spring.factories
@@ -0,0 +1 @@
+org.springframework.security.config.annotation.web.configurers.AbstractHttpConfigurer = dev.clutcher.security.starter.SpringSecurityExceptionFilterConfigurer
\ No newline at end of file
diff --git a/spring-security-exception-handler-starter/src/main/resources/META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports b/spring-security-exception-handler-starter/src/main/resources/META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports
new file mode 100644
index 0000000..e542c52
--- /dev/null
+++ b/spring-security-exception-handler-starter/src/main/resources/META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports
@@ -0,0 +1 @@
+dev.clutcher.security.starter.SpringSecurityExceptionHandlerAutoConfiguration
\ No newline at end of file
diff --git a/spring-security-exception-handler/build.gradle.kts b/spring-security-exception-handler/build.gradle.kts
new file mode 100644
index 0000000..6773267
--- /dev/null
+++ b/spring-security-exception-handler/build.gradle.kts
@@ -0,0 +1,19 @@
+plugins {
+    id("java")
+}
+
+dependencies {
+    compileOnly(platform("org.springframework.security:spring-security-bom:6.4.4"))
+
+    compileOnly("org.springframework.security:spring-security-core")
+    compileOnly("org.springframework.security:spring-security-web")
+
+    compileOnly("jakarta.servlet:jakarta.servlet-api:6.0.0")
+
+    testImplementation("org.springframework.security:spring-security-core")
+    testImplementation("org.springframework.security:spring-security-web")
+    testImplementation("jakarta.servlet:jakarta.servlet-api:6.0.0")
+    testImplementation("org.mockito:mockito-junit-jupiter:5.18.0")
+
+    testRuntimeOnly("org.junit.platform:junit-platform-launcher")
+}
\ No newline at end of file
diff --git a/spring-security-exception-handler/src/main/java/dev/clutcher/security/filter/SpringSecurityExceptionFilter.java b/spring-security-exception-handler/src/main/java/dev/clutcher/security/filter/SpringSecurityExceptionFilter.java
new file mode 100644
index 0000000..3cc9156
--- /dev/null
+++ b/spring-security-exception-handler/src/main/java/dev/clutcher/security/filter/SpringSecurityExceptionFilter.java
@@ -0,0 +1,50 @@
+package dev.clutcher.security.filter;
+
+import dev.clutcher.security.handler.SpringSecurityExceptionHandler;
+import jakarta.servlet.FilterChain;
+import jakarta.servlet.ServletException;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.security.access.AccessDeniedException;
+import org.springframework.security.core.AuthenticationException;
+import org.springframework.web.filter.OncePerRequestFilter;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+public class SpringSecurityExceptionFilter extends OncePerRequestFilter {
+
+    private List<SpringSecurityExceptionHandler> handlers;
+
+    public SpringSecurityExceptionFilter(List<SpringSecurityExceptionHandler> handlers) {
+        this.handlers = new ArrayList<>(handlers);
+    }
+
+    public SpringSecurityExceptionFilter() {
+        this.handlers = new ArrayList<>();
+    }
+
+    @Autowired
+    public void setHandlers(List<SpringSecurityExceptionHandler> handlers) {
+        this.handlers = new ArrayList<>(handlers);
+    }
+
+    @Override
+    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
+            throws ServletException, IOException {
+        try {
+            filterChain.doFilter(request, response);
+        } catch (AuthenticationException | AccessDeniedException ex) {
+            for (SpringSecurityExceptionHandler handler : handlers) {
+                if (handler.canHandle(request)) {
+                    handler.handle(ex, response);
+                    return;
+                }
+            }
+            throw ex;
+        }
+    }
+}
\ No newline at end of file
diff --git a/spring-security-exception-handler/src/main/java/dev/clutcher/security/handler/SpringSecurityExceptionHandler.java b/spring-security-exception-handler/src/main/java/dev/clutcher/security/handler/SpringSecurityExceptionHandler.java
new file mode 100644
index 0000000..997b60c
--- /dev/null
+++ b/spring-security-exception-handler/src/main/java/dev/clutcher/security/handler/SpringSecurityExceptionHandler.java
@@ -0,0 +1,15 @@
+package dev.clutcher.security.handler;
+
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import org.springframework.core.Ordered;
+
+import java.io.IOException;
+
+public interface SpringSecurityExceptionHandler extends Ordered {
+
+    boolean canHandle(HttpServletRequest request);
+
+    void handle(RuntimeException exception, HttpServletResponse response) throws IOException;
+
+}
diff --git a/spring-security-exception-handler/src/main/java/dev/clutcher/security/handler/SpringSecurityExceptionHandlerBuilder.java b/spring-security-exception-handler/src/main/java/dev/clutcher/security/handler/SpringSecurityExceptionHandlerBuilder.java
new file mode 100644
index 0000000..f520ff4
--- /dev/null
+++ b/spring-security-exception-handler/src/main/java/dev/clutcher/security/handler/SpringSecurityExceptionHandlerBuilder.java
@@ -0,0 +1,56 @@
+package dev.clutcher.security.handler;
+
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+
+import java.io.IOException;
+import java.util.function.BiConsumer;
+import java.util.function.Predicate;
+
+public class SpringSecurityExceptionHandlerBuilder {
+
+    private Predicate<HttpServletRequest> canHandlePredicate;
+    private BiConsumer<RuntimeException, HttpServletResponse> handleFunction;
+    private int order = 0;
+
+    private SpringSecurityExceptionHandlerBuilder() {
+    }
+
+    public static SpringSecurityExceptionHandlerBuilder builder() {
+        return new SpringSecurityExceptionHandlerBuilder();
+    }
+
+    public SpringSecurityExceptionHandlerBuilder canHandle(Predicate<HttpServletRequest> canHandlePredicate) {
+        this.canHandlePredicate = canHandlePredicate;
+        return this;
+    }
+
+    public SpringSecurityExceptionHandlerBuilder handle(BiConsumer<RuntimeException, HttpServletResponse> handleFunction) {
+        this.handleFunction = handleFunction;
+        return this;
+    }
+
+    public SpringSecurityExceptionHandlerBuilder order(int order) {
+        this.order = order;
+        return this;
+    }
+
+    public SpringSecurityExceptionHandler build() {
+        return new SpringSecurityExceptionHandler() {
+            @Override
+            public boolean canHandle(HttpServletRequest request) {
+                return canHandlePredicate.test(request);
+            }
+
+            @Override
+            public void handle(RuntimeException exception, HttpServletResponse response) {
+                handleFunction.accept(exception, response);
+            }
+
+            @Override
+            public int getOrder() {
+                return order;
+            }
+        };
+    }
+}
diff --git a/spring-security-exception-handler/src/main/java/dev/clutcher/security/handler/functions/ErrorResponseWritingConsumer.java b/spring-security-exception-handler/src/main/java/dev/clutcher/security/handler/functions/ErrorResponseWritingConsumer.java
new file mode 100644
index 0000000..39dabc7
--- /dev/null
+++ b/spring-security-exception-handler/src/main/java/dev/clutcher/security/handler/functions/ErrorResponseWritingConsumer.java
@@ -0,0 +1,37 @@
+package dev.clutcher.security.handler.functions;
+
+import jakarta.servlet.http.HttpServletResponse;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.util.function.BiConsumer;
+import java.util.function.Function;
+
+public class ErrorResponseWritingConsumer implements BiConsumer<RuntimeException, HttpServletResponse> {
+
+    private final Function<RuntimeException, ErrorResponse> exceptionMapper;
+
+    public ErrorResponseWritingConsumer(Function<RuntimeException, ErrorResponse> exceptionMapper) {
+        this.exceptionMapper = exceptionMapper;
+    }
+
+
+    @Override
+    public void accept(RuntimeException exception, HttpServletResponse response) {
+        ErrorResponse errorResponse = exceptionMapper.apply(exception);
+
+        response.setStatus(errorResponse.status());
+        response.setContentType("application/json");
+        response.setCharacterEncoding("UTF-8");
+
+        try (PrintWriter writer = response.getWriter()) {
+            writer.write(errorResponse.body());
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public record ErrorResponse(int status, String body) {
+    }
+
+}
diff --git a/spring-security-exception-handler/src/main/java/dev/clutcher/security/handler/functions/ExceptionMappingFunctions.java b/spring-security-exception-handler/src/main/java/dev/clutcher/security/handler/functions/ExceptionMappingFunctions.java
new file mode 100644
index 0000000..7f1867f
--- /dev/null
+++ b/spring-security-exception-handler/src/main/java/dev/clutcher/security/handler/functions/ExceptionMappingFunctions.java
@@ -0,0 +1,54 @@
+package dev.clutcher.security.handler.functions;
+
+import jakarta.servlet.http.HttpServletResponse;
+import org.springframework.security.access.AccessDeniedException;
+import org.springframework.security.core.AuthenticationException;
+
+import java.util.function.Function;
+
+public class ExceptionMappingFunctions {
+
+    public static Function<RuntimeException, ErrorResponseWritingConsumer.ErrorResponse> jsonBodyExceptionMapping() {
+        return exception -> {
+            if (exception instanceof AuthenticationException) {
+                return new ErrorResponseWritingConsumer.ErrorResponse(
+                        HttpServletResponse.SC_UNAUTHORIZED,
+                        "{\"code\":\"AUTHENTICATION_ERROR\",\"message\":\"Authentication required\"}"
+                );
+            }
+            if (exception instanceof AccessDeniedException) {
+                return new ErrorResponseWritingConsumer.ErrorResponse(
+                        HttpServletResponse.SC_FORBIDDEN,
+                        "{\"code\":\"ACCESS_DENIED\",\"message\":\"Access denied\"}"
+                );
+            }
+            return new ErrorResponseWritingConsumer.ErrorResponse(
+                    HttpServletResponse.SC_INTERNAL_SERVER_ERROR,
+                    "{\"code\":\"INTERNAL_ERROR\",\"message\":\"Internal server error\"}"
+            );
+        };
+    }
+
+    public static Function<RuntimeException, ErrorResponseWritingConsumer.ErrorResponse> graphqlJsonBodyExceptionMapping() {
+        return exception -> {
+            if (exception instanceof AuthenticationException) {
+                return new ErrorResponseWritingConsumer.ErrorResponse(
+                        HttpServletResponse.SC_UNAUTHORIZED,
+                        "{\"errors\":[{\"message\":\"Authentication required\",\"extensions\":{\"errorType\":\"AUTHENTICATION_REQUIRED\",\"classification\":\"UNAUTHENTICATED\",\"code\":\"AUTHENTICATION_ERROR\"}}]}"
+                );
+            }
+            if (exception instanceof AccessDeniedException) {
+                return new ErrorResponseWritingConsumer.ErrorResponse(
+                        HttpServletResponse.SC_FORBIDDEN,
+                        "{\"errors\":[{\"message\":\"Access denied\",\"extensions\":{\"errorType\":\"ACCESS_DENIED\",\"classification\":\"FORBIDDEN\",\"code\":\"ACCESS_DENIED\"}}]}"
+                );
+            }
+            return new ErrorResponseWritingConsumer.ErrorResponse(
+                    HttpServletResponse.SC_INTERNAL_SERVER_ERROR,
+                    "{\"errors\":[{\"message\":\"Internal server error\",\"extensions\":{\"errorType\":\"INTERNAL_SERVER_ERROR\",\"classification\":\"INTERNAL_ERROR\",\"code\":\"INTERNAL_ERROR\"}}]}"
+            );
+        };
+    }
+
+
+}
diff --git a/spring-security-exception-handler/src/main/java/dev/clutcher/security/handler/functions/UrlMatchingPredicate.java b/spring-security-exception-handler/src/main/java/dev/clutcher/security/handler/functions/UrlMatchingPredicate.java
new file mode 100644
index 0000000..cd48880
--- /dev/null
+++ b/spring-security-exception-handler/src/main/java/dev/clutcher/security/handler/functions/UrlMatchingPredicate.java
@@ -0,0 +1,25 @@
+package dev.clutcher.security.handler.functions;
+
+import jakarta.servlet.http.HttpServletRequest;
+import org.springframework.util.AntPathMatcher;
+import org.springframework.util.PathMatcher;
+
+import java.util.List;
+import java.util.function.Predicate;
+
+public class UrlMatchingPredicate implements Predicate<HttpServletRequest> {
+
+    private static final PathMatcher PATH_MATCHER = new AntPathMatcher();
+
+    private final List<String> urlPatterns;
+
+    public UrlMatchingPredicate(List<String> urlPatterns) {
+        this.urlPatterns = urlPatterns;
+    }
+
+    public boolean test(HttpServletRequest request) {
+        String requestUri = request.getRequestURI();
+        return urlPatterns.stream().anyMatch(pattern -> PATH_MATCHER.match(pattern, requestUri));
+    }
+
+}
diff --git a/spring-security-exception-handler/src/test/java/dev/clutcher/security/handler/SpringSecurityExceptionHandlerBuilderTest.java b/spring-security-exception-handler/src/test/java/dev/clutcher/security/handler/SpringSecurityExceptionHandlerBuilderTest.java
new file mode 100644
index 0000000..b3cb301
--- /dev/null
+++ b/spring-security-exception-handler/src/test/java/dev/clutcher/security/handler/SpringSecurityExceptionHandlerBuilderTest.java
@@ -0,0 +1,50 @@
+package dev.clutcher.security.handler;
+
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import java.io.IOException;
+import java.util.function.BiConsumer;
+import java.util.function.Predicate;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.mockito.Mockito.when;
+
+@ExtendWith(MockitoExtension.class)
+class SpringSecurityExceptionHandlerBuilderTest {
+
+    @Mock
+    private HttpServletRequest request;
+
+    @Mock
+    private Predicate<HttpServletRequest> canHandlePredicate;
+
+    @Mock
+    private BiConsumer<RuntimeException, HttpServletResponse> handleFunction;
+
+    @Test
+    void shouldCreateHandlerInstance() {
+        // Given
+        when(canHandlePredicate.test(request)).thenReturn(true);
+
+        // When
+        SpringSecurityExceptionHandler handler = SpringSecurityExceptionHandlerBuilder.builder()
+                                                                                      .canHandle(canHandlePredicate)
+                                                                                      .handle(handleFunction)
+                                                                                      .order(42)
+                                                                                      .build();
+
+        // Then
+        boolean canHandle = handler.canHandle(request);
+        assertTrue(canHandle);
+
+        int order = handler.getOrder();
+        assertEquals(42, order);
+    }
+
+}
diff --git a/spring-security-exception-handler/src/test/java/dev/clutcher/security/handler/functions/GraphqlJsonBodyExceptionMappingTest.java b/spring-security-exception-handler/src/test/java/dev/clutcher/security/handler/functions/GraphqlJsonBodyExceptionMappingTest.java
new file mode 100644
index 0000000..9f67a7f
--- /dev/null
+++ b/spring-security-exception-handler/src/test/java/dev/clutcher/security/handler/functions/GraphqlJsonBodyExceptionMappingTest.java
@@ -0,0 +1,59 @@
+package dev.clutcher.security.handler.functions;
+
+import jakarta.servlet.http.HttpServletResponse;
+import org.junit.jupiter.api.Test;
+import org.springframework.security.access.AccessDeniedException;
+import org.springframework.security.authentication.BadCredentialsException;
+import org.springframework.security.core.AuthenticationException;
+
+import java.util.function.Function;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+class GraphqlJsonBodyExceptionMappingTest {
+
+    @Test
+    void shouldConvertAuthenticationException() {
+        // Given
+        Function<RuntimeException, ErrorResponseWritingConsumer.ErrorResponse> mapper =
+                ExceptionMappingFunctions.graphqlJsonBodyExceptionMapping();
+        AuthenticationException exception = new BadCredentialsException("Invalid credentials");
+
+        // When
+        ErrorResponseWritingConsumer.ErrorResponse response = mapper.apply(exception);
+
+        // Then
+        assertEquals(HttpServletResponse.SC_UNAUTHORIZED, response.status());
+        assertEquals("{\"errors\":[{\"message\":\"Authentication required\",\"extensions\":{\"errorType\":\"AUTHENTICATION_REQUIRED\",\"classification\":\"UNAUTHENTICATED\",\"code\":\"AUTHENTICATION_ERROR\"}}]}", response.body());
+    }
+
+    @Test
+    void shouldConvertAccessDeniedException() {
+        // Given
+        Function<RuntimeException, ErrorResponseWritingConsumer.ErrorResponse> mapper =
+                ExceptionMappingFunctions.graphqlJsonBodyExceptionMapping();
+        AccessDeniedException exception = new AccessDeniedException("Access denied");
+
+        // When
+        ErrorResponseWritingConsumer.ErrorResponse response = mapper.apply(exception);
+
+        // Then
+        assertEquals(HttpServletResponse.SC_FORBIDDEN, response.status());
+        assertEquals("{\"errors\":[{\"message\":\"Access denied\",\"extensions\":{\"errorType\":\"ACCESS_DENIED\",\"classification\":\"FORBIDDEN\",\"code\":\"ACCESS_DENIED\"}}]}", response.body());
+    }
+
+    @Test
+    void shouldConvertNonSpringSecurityException() {
+        // Given
+        Function<RuntimeException, ErrorResponseWritingConsumer.ErrorResponse> mapper =
+                ExceptionMappingFunctions.graphqlJsonBodyExceptionMapping();
+        RuntimeException exception = new RuntimeException("Some error");
+
+        // When
+        ErrorResponseWritingConsumer.ErrorResponse response = mapper.apply(exception);
+
+        // Then
+        assertEquals(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, response.status());
+        assertEquals("{\"errors\":[{\"message\":\"Internal server error\",\"extensions\":{\"errorType\":\"INTERNAL_SERVER_ERROR\",\"classification\":\"INTERNAL_ERROR\",\"code\":\"INTERNAL_ERROR\"}}]}", response.body());
+    }
+}
\ No newline at end of file
diff --git a/spring-security-exception-handler/src/test/java/dev/clutcher/security/handler/functions/JsonBodyExceptionMappingTest.java b/spring-security-exception-handler/src/test/java/dev/clutcher/security/handler/functions/JsonBodyExceptionMappingTest.java
new file mode 100644
index 0000000..a06cc1a
--- /dev/null
+++ b/spring-security-exception-handler/src/test/java/dev/clutcher/security/handler/functions/JsonBodyExceptionMappingTest.java
@@ -0,0 +1,59 @@
+package dev.clutcher.security.handler.functions;
+
+import jakarta.servlet.http.HttpServletResponse;
+import org.junit.jupiter.api.Test;
+import org.springframework.security.access.AccessDeniedException;
+import org.springframework.security.authentication.BadCredentialsException;
+import org.springframework.security.core.AuthenticationException;
+
+import java.util.function.Function;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+class JsonBodyExceptionMappingTest {
+
+    @Test
+    void shouldConvertAuthenticationException() {
+        // Given
+        Function<RuntimeException, ErrorResponseWritingConsumer.ErrorResponse> mapper =
+                ExceptionMappingFunctions.jsonBodyExceptionMapping();
+        AuthenticationException exception = new BadCredentialsException("Invalid credentials");
+
+        // When
+        ErrorResponseWritingConsumer.ErrorResponse response = mapper.apply(exception);
+
+        // Then
+        assertEquals(HttpServletResponse.SC_UNAUTHORIZED, response.status());
+        assertEquals("{\"code\":\"AUTHENTICATION_ERROR\",\"message\":\"Authentication required\"}", response.body());
+    }
+
+    @Test
+    void shouldConvertAccessDeniedException() {
+        // Given
+        Function<RuntimeException, ErrorResponseWritingConsumer.ErrorResponse> mapper =
+                ExceptionMappingFunctions.jsonBodyExceptionMapping();
+        AccessDeniedException exception = new AccessDeniedException("Access denied");
+
+        // When
+        ErrorResponseWritingConsumer.ErrorResponse response = mapper.apply(exception);
+
+        // Then
+        assertEquals(HttpServletResponse.SC_FORBIDDEN, response.status());
+        assertEquals("{\"code\":\"ACCESS_DENIED\",\"message\":\"Access denied\"}", response.body());
+    }
+
+    @Test
+    void shouldConvertNonSpringSecurityException() {
+        // Given
+        Function<RuntimeException, ErrorResponseWritingConsumer.ErrorResponse> mapper =
+                ExceptionMappingFunctions.jsonBodyExceptionMapping();
+        RuntimeException exception = new RuntimeException("Some error");
+
+        // When
+        ErrorResponseWritingConsumer.ErrorResponse response = mapper.apply(exception);
+
+        // Then
+        assertEquals(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, response.status());
+        assertEquals("{\"code\":\"INTERNAL_ERROR\",\"message\":\"Internal server error\"}", response.body());
+    }
+}
\ No newline at end of file
diff --git a/spring-security-exception-handler/src/test/java/dev/clutcher/security/handler/functions/UrlMatchingPredicateTest.java b/spring-security-exception-handler/src/test/java/dev/clutcher/security/handler/functions/UrlMatchingPredicateTest.java
new file mode 100644
index 0000000..793b69a
--- /dev/null
+++ b/spring-security-exception-handler/src/test/java/dev/clutcher/security/handler/functions/UrlMatchingPredicateTest.java
@@ -0,0 +1,92 @@
+package dev.clutcher.security.handler.functions;
+
+import jakarta.servlet.http.HttpServletRequest;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.mockito.Mockito.when;
+
+@ExtendWith(MockitoExtension.class)
+class UrlMatchingPredicateTest {
+
+    @Mock
+    private HttpServletRequest request;
+
+    @Test
+    void shouldNotMatchAnyUrlWhenNoPatternsAreGiven() {
+        // Given
+        UrlMatchingPredicate predicate = new UrlMatchingPredicate(Collections.emptyList());
+        when(request.getRequestURI()).thenReturn("/api/users");
+
+        // When
+        boolean result = predicate.test(request);
+
+        // Then
+        assertFalse(result);
+    }
+
+    @Test
+    void shouldMatchWhenExactPatternIsUsed() {
+        // Given
+        UrlMatchingPredicate predicate = new UrlMatchingPredicate(List.of("/api/users"));
+        when(request.getRequestURI()).thenReturn("/api/users");
+
+        // When
+        boolean result = predicate.test(request);
+
+        // Then
+        assertTrue(result);
+    }
+
+    @Test
+    void shouldMatchWhenWildcardPatternIsUsed() {
+        // Given
+        UrlMatchingPredicate predicate = new UrlMatchingPredicate(List.of("/api/**"));
+        when(request.getRequestURI()).thenReturn("/api/users/123");
+
+        // When
+        boolean result = predicate.test(request);
+
+        // Then
+        assertTrue(result);
+    }
+
+    @Test
+    void shouldMatchWhenMultipleMatchersProvided() {
+        // Given
+        UrlMatchingPredicate predicate = new UrlMatchingPredicate(
+                Arrays.asList("/api/users/**", "/api/products/**", "/graphql")
+        );
+        when(request.getRequestURI()).thenReturn("/graphql");
+
+        // When
+        boolean result = predicate.test(request);
+
+        // Then
+        assertTrue(result);
+    }
+
+    @Test
+    void shouldNotMatch() {
+        // Given
+        UrlMatchingPredicate predicate = new UrlMatchingPredicate(
+                Arrays.asList("/api/users/**", "/api/products/**", "/graphql")
+        );
+        when(request.getRequestURI()).thenReturn("/api/orders/789");
+
+        // When
+        boolean result = predicate.test(request);
+
+        // Then
+        assertFalse(result);
+    }
+
+}