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Spring Boot项目启用native构建后由于序列化对象缺少ReflectionHints导致json数据为'{}'

· One min read
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programmer on jvm platform

基于graalvm的spring boot项目打包好后调用/scheduling/api/v1/taskDefinitions接口返回如下数据, 其中triggerStrategy字段是空json对象

[
	{
		"id": "BILLING_SYNC_FOR_DEPLOYMENT_127",
		"triggerStrategy": {},
		"tags": {
			"EXECUTOR": "com.fastonetech.billing.sync.scheduling.BillingSyncTaskExecutor"
		},
		"variables": {
			"SOURCE_RCLONE_CONFIG": "TENCENT_ap-beijing",
			"SOURCE_BUCKET": "cheng1201-1310454728",
			"SOURCE_PATH": "",
			"TARGET_RCLONE_CONFIG": "aggregation",
			"TARGET_BUCKET": "billing-aggregation",
			"TARGET_PATH": "TENCENT/ap-beijing/cheng1201-1310454728"
		}
	}
]

原因​

triggerStrategy字段对应的java中的类型是interface, 需要为spring-aot进行配置, 以便其能够在运行时被正确地序列化

解决方案​

在ReflectiveProcessor实现类中新增如下配置, 这里只展示了本次修复的内容
其中, TaskTriggerStrategy为interface, CronTaskTriggerStrategy和PeriodicTaskTriggerStrategy为其实现类

class ReflectiveProcessorImpl : ReflectiveProcessor {

	override fun registerReflectionHints(hints: ReflectionHints, element: AnnotatedElement) {
		val registrar = BindingReflectionHintsRegistrar()
		registrar.registerReflectionHints(
			hints,
			arrayOf(
				TaskTriggerStrategy::class.java,
				CronTaskTriggerStrategy::class.java,
				PeriodicTaskTriggerStrategy::class.java
			)
		)
	}

}

备注​