Question

我制作了一个CustomvaultQuery.Service类，用于从数据库中获取详细信息以在流中使用它，但是在日志中，它显示IllegalArgument，因为在Corda中找不到CustomvaultQuery $ Service，因为它是@CordaService

Answer 1

请查看有关Corda服务代码的以下示例：

private fun directPayment() {
    val ourIdentity = ourIdentity()
    serviceHub.vaultService.trackBy<PaymentRequestState>().updates.subscribe {
        update: Vault.Update<PaymentRequestState> -> update.produced.forEach{
        message: StateAndRef<PaymentRequestState> ->
            val state = message.state
            if (ourIdentity == serviceHub.networkMapCache.getPeerByLegalName(CordaX500Name("BankOperator", "Toronto", "CA"))!!) {
                executor.execute {
                    log.info("Directing to message $state")
                    serviceHub.startFlow(PaymentFlowInitiator())
                }
            }
        }
    }
}

这正是您正在寻找的数据库查询服务。完整代码位于：https://github.com/corda/samples-kotlin/blob/master/Features/cordaService-autopayroll/workflows-kotlin/src/main/kotlin/net/corda/examples/autopayroll/flows/AutoPaymentService.kt

Corda服务未在本地运行

1 个答案: