我想在Java项目中运行ContractUpgradeFlow.Initiate流。像这样：
CordaRPCOps proxy = client.start(rpcUsername, rpcPassword).getProxy();
proxy.startFlowDynamic(ContractUpgradeFlow.Initiate.class,stateAndRef,newContractClass.class);
但有错误：
Required type:Class<? extends FlowLogic<? extends T>>
Provided :Class<Initiate>
reason: no instance(s) of type variable(s) T exist so that Initiate conforms to FlowLogic<? extends T>
kotlin版本是这样的：
https://github.com/corda/samples/blob/release-V4/explicit-cordapp-upgrades/src/main/kotlin/com/upgrade/client/ClientWithLegacyConstraint.kt
我如何在Java项目中运行ContractUpgradeFlow.Initiate？
最佳答案
由于某些原因，ContractUpgradeFlow.Initiate未标识为FlowLogic类型。可能是因为它不是FlowLogic的直接子类型。感谢您指出这一点，我为此提出了一个错误。
但是，您可以使用一种变通方法来解决此问题，创建新的流，并将ContractUpgradeFlow.Initiate称为子流。
@InitiatingFlow
@StartableByRPC
public class ExplicitUpgradeFlow extends FlowLogic<Void> {
private final StateAndRef oldStateAndRef;
private final Class newContractClass;
public ExplicitUpgradeFlow(StateAndRef oldStateAndRef, Class newContractClass) {
this.oldStateAndRef = oldStateAndRef;
this.newContractClass = newContractClass;
}
@Override
public Void call() throws FlowException {
subFlow(new ContractUpgradeFlow.Initiate(oldStateAndRef, newContractClass));
return null;
}
}