[Fixed] Spring boot 3 ehcache config setup issue – Spring

The Problem:

The user is trying to set up Ehcache in their Spring Boot application using an ehcache.xml configuration file. However, when they start the application, they get an error related to the javax.xml.bind.ValidationEventHandler class. The issue may lie in their ehcache.xml file or their classpath configuration. The error suggests that the ValidationEventHandler class cannot be found, which could indicate a missing dependency or an incorrect configuration in the ehcache.xml file.

The Solutions:

Solution 1: Add ehcache-jakarta dependency

Add the following dependency to your ‘pom.xml’ file:

<dependency>
  <groupId>org.ehcache</groupId>
  <artifactId>ehcache-jakarta</artifactId>
  <version>3.10.7</version>
</dependency>

This dependency provides the necessary classes for XML validation in Ehcache 3.x.

Solution 2: Configure Ehcache with JCacheCacheManager

Spring boot 3 deprecates the EhCacheCacheManager implementation for CacheManager. It introduces JCacheCacheManager, which offers similar configuration properties as EhCacheCacheManager. Here’s how to configure it:

1. Add the following dependencies to your pom.xml:

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-cache</artifactId>
</dependency>

<dependency>
    <groupId>org.ehcache</groupId>
    <artifactId>ehcache</artifactId>
</dependency>

2. Create a configuration class and annotate it with @Configuration and @EnableCaching:

@Configuration
@EnableCaching
public class CachingConfig {
// ... (configuration code)
}

3. Define the CacheManager bean using JCacheCacheManager:

@Bean
public CacheManager jCacheCacheManager() {
    // Create a map of cache configurations
    Map<String, CacheConfiguration<?, ?>> cacheMap = ...;

    EhcacheCachingProvider ehcacheCachingProvider = ...;
    DefaultConfiguration defaultConfiguration = ...;
    javax.cache.CacheManager cacheManager = ...;

    return new JCacheCacheManager(cacheManager);
}

4. Configure the cache expirations and other properties according to your requirements.

With these changes, you can use JCacheCacheManager to manage your caches in Spring Boot 3 and Ehcache 3.10.2.

Solution 3: Add Required Dependency

The error you’re encountering is related to missing dependency. Specifically, the error message mentions `javax.xml.bind.ValidationEventHandler` not being found. To resolve this, you need to add the following dependency to your project:

“`xml

jakarta.xml.bind
jakarta.xml.bind-api
4.0.0
compile

“`

This dependency provides the necessary classes for XML validation, which is required by Ehcache when parsing the `ehcache.xml` file. Ensure you have the dependency added to your project’s build configuration file, such as `pom.xml` for Maven or `build.gradle` for Gradle. After adding the dependency, rebuild your project and try running it again. The error related to `ValidationEventHandler` should be resolved.

Solution 4: {title}

In Spring Boot 3, dependency management for Ehcache’s ehcache and ehcache-transactions modules are now declared with a jakarta classifier. To support Jakarta EE 9 and later, dependency declarations in your pom.xml or build.gradle scripts should be similarly updated. For instance, in a Maven project, the dependency should be declared as follows:

    <dependency>
      <groupId>org.ehcache</groupId>
      <artifactId>ehcache</artifactId>
      <scope>runtime</scope>
      <classifier>jakarta</classifier>
    </dependency>

Video Explanation: