feat: add check classes exists condition on event listener annotation

src/main/kotlin/co/statu/parsek/api/annotation/EventListener.kt

@@ -1,10 +1,13 @@
 package co.statu.parsek.api.annotation
 
+import co.statu.parsek.api.condition.CheckClassesExists
+import org.springframework.context.annotation.Conditional
 import org.springframework.stereotype.Component
 
 @Target(AnnotationTarget.ANNOTATION_CLASS, AnnotationTarget.CLASS)
 @Retention(AnnotationRetention.RUNTIME)
 @Component
+@Conditional(CheckClassesExists::class)
 annotation class EventListener(
     val value: String = ""
 )

src/main/kotlin/co/statu/parsek/api/condition/CheckClassesExists.kt

@@ -0,0 +1,25 @@
+package co.statu.parsek.api.condition
+
+import org.springframework.context.annotation.Condition
+import org.springframework.context.annotation.ConditionContext
+import org.springframework.core.type.AnnotatedTypeMetadata
+import org.springframework.core.type.ClassMetadata
+
+class CheckClassesExists : Condition {
+    override fun matches(context: ConditionContext, metadata: AnnotatedTypeMetadata): Boolean {
+        if (metadata is ClassMetadata) {
+            val className = metadata.className
+            try {
+                val clazz = Class.forName(className)
+                clazz.interfaces // check if any of them are not exists
+                return true
+            } catch (e: NoClassDefFoundError) {
+                return false
+            } catch (e: ClassNotFoundException) {
+                return false
+            }
+        }
+
+        return false
+    }
+}