SpringBoot/HelloCorda
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tidied CreateChatFlow

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This commit is contained in:
mattbradburyr3 2023-01-29 14:08:41 +00:00
parent 974a6be2b5
commit 1c620b2fbc
4 changed files with 35 additions and 29 deletions
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2
contracts/src/main/java/com/r3/developers/csdetemplate/utxoexample/contracts/ChatContract.java
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@ -34,7 +34,6 @@ public class ChatContract implements Contract {
@Override
public void verify(UtxoLedgerTransaction transaction) {
// Command command = requireNonNull( transaction.getCommands().get(0), "Require a single command"); // this doesn't ensure there is one command
requireThat( transaction.getCommands().size() == 1, "Require a single command.");
Command command = transaction.getCommands().get(0);
@ -58,7 +57,6 @@ public class ChatContract implements Contract {
input.getParticipants().containsAll(output.getParticipants()) &&
output.getParticipants().containsAll(input.getParticipants()),
"When command is Update participants must not change.");
}
else {
throw new CordaRuntimeException("Unsupported command");

54
workflows/src/main/java/com/r3/developers/csdetemplate/utxoexample/workflows/CreateNewChatFlow.java
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@ -5,8 +5,8 @@ import com.r3.developers.csdetemplate.utxoexample.states.ChatState;
import net.corda.v5.application.flows.*;
import net.corda.v5.application.marshalling.JsonMarshallingService;
import net.corda.v5.application.membership.MemberLookup;
import net.corda.v5.application.messaging.FlowMessaging;
import net.corda.v5.base.annotations.Suspendable;
import net.corda.v5.base.exceptions.CordaRuntimeException;
import net.corda.v5.base.types.MemberX500Name;
import net.corda.v5.ledger.common.NotaryLookup;
import net.corda.v5.ledger.common.Party;
@ -15,7 +15,6 @@ import net.corda.v5.ledger.utxo.transaction.UtxoSignedTransaction;
import net.corda.v5.ledger.utxo.transaction.UtxoTransactionBuilder;
import net.corda.v5.membership.MemberInfo;
import net.corda.v5.membership.NotaryInfo;
import org.jetbrains.annotations.NotNull;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@ -45,28 +44,28 @@ public class CreateNewChatFlow implements RPCStartableFlow {
@CordaInject
public NotaryLookup notaryLookup;
@CordaInject
public FlowMessaging flowMessaging;
@CordaInject
public FlowEngine flowEngine;
@NotNull
// @NotNull
@Suspendable
@Override
public String call(@NotNull RPCRequestData requestBody) throws IllegalArgumentException {
// public String call(@NotNull RPCRequestData requestBody) throws IllegalArgumentException {
public String call(RPCRequestData requestBody) {
log.info("CreateNewChatFlow.call() called");
try {
CreateNewChatFlowArgs flowArgs = requestBody.getRequestBodyAs(jsonMarshallingService, CreateNewChatFlowArgs.class);
MemberInfo myInfo = memberLookup.myInfo();
MemberInfo otherMember = requireNonNull(
memberLookup.lookup(MemberX500Name.parse(flowArgs.getOtherMember())),
"can't find other member"
"MemberLookup can't find otherMember specified in flow arguments."
);
ChatState chatState = new ChatState(UUID.randomUUID(),
ChatState chatState = new ChatState(
UUID.randomUUID(),
flowArgs.getChatName(),
myInfo.getName(),
flowArgs.getMessage(),
@ -92,19 +91,28 @@ public class CreateNewChatFlow implements RPCStartableFlow {
// Quasar checkpointing has a bugs handling lambdas in flows.
// This is being worked upon.
PublicKey notaryKey = null;
for(MemberInfo info: memberLookup.lookup()){
if(Objects.equals(info.getMemberProvidedContext().get("corda.notary.service.name"), notary.getName().toString()) ) {
notaryKey = info.getLedgerKeys().get(0);
for(MemberInfo memberInfo: memberLookup.lookup()){
if(Objects.equals(
memberInfo.getMemberProvidedContext().get("corda.notary.service.name"),
notary.getName().toString())) {
notaryKey = memberInfo.getLedgerKeys().get(0);
break;
}
}
if(notary == null) {
throw new NullPointerException("No notary found");
if(notaryKey == null) {
throw new CordaRuntimeException("No notary PublicKey found");
}
log.info("notary.getName()=" + notary.getName());
log.info("chatState = " + chatState);
log.info("chatState.getParticipants().size() = " + chatState.getParticipants().size());
// This exception would never be reached because if 'notaryLookup.getNotaryServices().iterator().next()'
// didn't return a value, it would have thrown a NoSuchElementException
// if(notary == null) {
// throw new NullPointerException("No notary found");
// }
// log.info("notary.getName()=" + notary.getName());
// log.info("chatState = " + chatState);
// log.info("chatState.getParticipants().size() = " + chatState.getParticipants().size());
UtxoTransactionBuilder txBuilder = ledgerService.getTransactionBuilder()
.setNotary(new Party(notary.getName(), notaryKey))
@ -114,17 +122,17 @@ public class CreateNewChatFlow implements RPCStartableFlow {
.addSignatories(chatState.getParticipants());
log.info("Before UtxoSignedTransaction signedTransaction = txBuilder.toSignedTransaction(myInfo.getLedgerKeys().get(0));");
log.info("myInfo.getLedgerKeys().size() = " + myInfo.getLedgerKeys().size());
log.info("myInfo.getLedgerKeys().get(0) = " + myInfo.getLedgerKeys().get(0));
// log.info("Before UtxoSignedTransaction signedTransaction = txBuilder.toSignedTransaction(myInfo.getLedgerKeys().get(0));");
// log.info("myInfo.getLedgerKeys().size() = " + myInfo.getLedgerKeys().size());
// log.info("myInfo.getLedgerKeys().get(0) = " + myInfo.getLedgerKeys().get(0));
@SuppressWarnings("DEPRECATION")
UtxoSignedTransaction signedTransaction = txBuilder.toSignedTransaction(myInfo.getLedgerKeys().get(0));
log.info("After UtxoSignedTransaction signedTransaction = txBuilder.toSignedTransaction(myInfo.getLedgerKeys().get(0));");
return flowEngine.subFlow(new AppendChatSubFlow(signedTransaction, otherMember.getName()));
// log.info("After UtxoSignedTransaction signedTransaction = txBuilder.toSignedTransaction(myInfo.getLedgerKeys().get(0));");
return flowEngine.subFlow(new FinalizeChatSubFlow(signedTransaction, otherMember.getName()));
}
catch (Exception e) {
log.warn("Failed to process utxo flow for request body '$requestBody' because:'${e.message}'");
throw e;
throw new CordaRuntimeException(e.getMessage());
}
}
}

6
workflows/src/main/java/com/r3/developers/csdetemplate/utxoexample/workflows/AppendChatSubFlow.java → workflows/src/main/java/com/r3/developers/csdetemplate/utxoexample/workflows/FinalizeChatSubFlow.java
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@ -14,14 +14,14 @@ import java.util.Arrays;
import java.util.List;
@InitiatingFlow(protocol = "append-chat-protocol")
public class AppendChatSubFlow implements SubFlow<String> {
public class FinalizeChatSubFlow implements SubFlow<String> {
public AppendChatSubFlow(UtxoSignedTransaction signedTransaction, MemberX500Name otherMember) {
public FinalizeChatSubFlow(UtxoSignedTransaction signedTransaction, MemberX500Name otherMember) {
this.signedTransaction = signedTransaction;
this.otherMember = otherMember;
}
private final static Logger log = LoggerFactory.getLogger(AppendChatSubFlow.class);
private final static Logger log = LoggerFactory.getLogger(FinalizeChatSubFlow.class);
@CordaInject
public UtxoLedgerService ledgerService;

2
workflows/src/main/java/com/r3/developers/csdetemplate/utxoexample/workflows/UpdateChatFlow.java
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@ -94,7 +94,7 @@ public class UpdateChatFlow implements RPCStartableFlow {
@SuppressWarnings("DEPRECATION")
UtxoSignedTransaction signedTransaction = txBuilder.toSignedTransaction(myInfo.getLedgerKeys().get(0));
return flowEngine.subFlow(new AppendChatSubFlow(signedTransaction, otherMember.getName()));
return flowEngine.subFlow(new FinalizeChatSubFlow(signedTransaction, otherMember.getName()));
} catch (Exception e) {
log.warn("Failed to process utxo flow for request body '$requestBody' because:'${e.message}'");
throw e;