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1. InitializingBean, DisposableBean 인터페이스

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class BeanTest : **InitializingBean, DisposableBean** {\n\n    init {\n        println(\"call initBlock\")\n    }\n\n    fun initTest() {\n        println(\"call initTest\")\n    }\n\n    fun destroyTest() {\n        println(\"call destroyTest\")\n    }\n\n    // 의존관계 주입이 끝나면 호출\n    **override fun afterPropertiesSet**() {\n        initTest()\n    }\n\n\t\t// 스프링 컨테이너 종료시 호출\n    **override fun destroy**() {\n        destroyTest()\n    }\n}
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2. initMethod, destroyMethod

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@Configuration\nclass WebConfig {\n\n    **@Bean(initMethod = \"initTest\", destroyMethod = \"destroyTest\")**\n    fun getBeanTest(): BeanTest {\n        return BeanTest()\n    }\n}\n\nclass BeanTest {\n    private val logger = LoggerFactory.getLogger(\"!!! bean check log !!!\")\n\n    init {\n        logger.info(\"call initBlock\")\n    }\n\n    fun initTest() {\n        logger.info(\"call initTest\")\n    }\n\n    fun destroyTest() {\n        logger.info(\"call destroyTest\")\n    }\n}
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2.2. 종료 메소드 추론

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@Configuration\nclass WebConfig {\n\n    @Bean(initMethod = \"initTest\")\n    fun getBeanTest(): BeanTest {\n        return BeanTest()\n    }\n}\n\nclass BeanTest {\n    private val logger = LoggerFactory.getLogger(\"!!! bean check log !!!\")\n\n    init {\n        logger.info(\"call initBlock\")\n    }\n\n    fun initTest() {\n        logger.info(\"call initTest\")\n    }\n\n    **fun close() { // 스프링 컨테이너 종료시 호출됨\n        logger.info(\"call destroyTest\")\n    }**\n}
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3. PostConstruct, PreDestroy

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@Configuration\nclass WebConfig {\n\n    @Bean()\n    fun getBeanTest(): BeanTest {\n        return BeanTest()\n    }\n}\n\nclass BeanTest {\n    private val logger = LoggerFactory.getLogger(\"!!! bean check log !!!\")\n\n    init {\n        logger.info(\"call initBlock\")\n    }\n\n    **@PostConstruct**\n    fun initTest() {\n        logger.info(\"call initTest\")\n    }\n\n    **@PreDestroy**\n    fun destroyTest() {\n        logger.info(\"call destroyTest\")\n    }\n}
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4. 정리

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보통은 @PostConstruct, @PreDestroy 을 사용하는걸 권장하지만, 외부 라이브러리 초기화/ 소멸시 처리해야 할 과정이 있다면, @Bean 의 InitMethod, destroyMethod를 사용하면 된다.

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4.1. 만약 SIGKILL 시그널(kill -9 {PID})로 종료가 되었다면,

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4.2. 호출 순서는?

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