@Transactional在使用自定義事務管理器的Spring Boot中不起作用

Question

我正在嘗試編寫自己的自定義PlatformTransactionManager以便與Neo4J一起使用（注意-由於各種原因，我不想使用OGM，這意味着不使用Spring Data）。

我編寫了一個非常簡單的Neo4jTransactionManager，並將其添加到我的上下文中，以及@EnableTransactionManagement批注，然后將@Transactonal添加到了我的運行狀況檢查-它不會觸發任何操作。

代碼如下：（注意-Neo4jOperations是Driver的包裝，使調用數據庫更加容易，其目的類似於JdbcOperations）

class Neo4jTransactionManager(private val driver: Driver) : AbstractPlatformTransactionManager() {
    companion object {
        private val LOG = LoggerFactory.getLogger(Neo4jTransactionManager::class.java)
    }

    class Neo4jTransaction(private val driver: Driver) {
        var session: Session? = null
        var transaction: Transaction? = null

        fun start() {
            if (session != null) {
                throw CannotCreateTransactionException("Transaction already started")
            }

            session = driver.session()
            transaction = session?.beginTransaction()
        }
    }

    override fun doCommit(status: DefaultTransactionStatus) {
        val transaction = unwrapTransaction(status)
        LOG.debug("Committing transaction: {}", transaction)

        if (transaction.transaction == null) {
            throw NoTransactionException("No current transaction")
        }
        transaction.transaction?.success()
        transaction.transaction?.close()
        transaction.session?.close()
    }

    override fun doBegin(transaction: Any, definition: TransactionDefinition) {
        (transaction as Neo4jTransaction).start()
    }

    override fun doGetTransaction(): Any {
        return Neo4jTransaction(driver)
    }

    override fun doRollback(status: DefaultTransactionStatus) {
        val transaction = unwrapTransaction(status)
        LOG.debug("Rolling back transaction: {}", transaction)

        if (transaction.transaction == null) {
            throw NoTransactionException("No current transaction")
        }
        transaction.transaction?.failure()
        transaction.transaction?.close()
        transaction.session?.close()
    }

    private fun unwrapTransaction(status: DefaultTransactionStatus) : Neo4jTransaction {
        return status.transaction as Neo4jTransaction
    }
}

@Configuration
@EnableTransactionManagement(proxyTargetClass = true, mode = AdviceMode.PROXY)
class DatabaseConfig {
.....
    @Bean("transactionManager")
    fun neo4jTransactionManager(driver: Driver) = Neo4jTransactionManager(driver)

    @Bean
    fun neo4jHealthcheck(neo4jOperations: Neo4jOperations) = Neo4jHealthcheck(neo4jOperations)

}

@Transactional
class Neo4jHealthcheck(private val neo4jOperations: Neo4jOperations) : AbstractHealthIndicator() {
    companion object {
        private const val QUERY = "MATCH (n) RETURN count(*) as count"
    }

    @Transactional
    override fun doHealthCheck(builder: Health.Builder) {
        val count = neo4jOperations.queryOne(QUERY).get("count").asInt()

        builder.up()
                .withDetail("Nodes", count)
                .build()
    }
}

我希望看到我的運行狀況檢查在事務內容周圍發出一些日志消息，並在調試時在stacktrace中看到它們。 但我什么都看不到，因此幾乎完全忽略了我的@Transactional批注。

我錯過了什么？

干杯

Answer 1

如我所見，Neo4jHealthcheck不是彈簧組件。 因此，可能沒有創建代理。

您必須將@Component或任何子類型添加到Neo4jHealthcheck

看一看有關執行器和事務的示例：

https://github.com/simasch/actuator-transactional