@Override
public void registerTransactionListener(final TransactionListener listener)
throws BCSAPIException {
try {
addTopicListener(
"transaction",
listener,
bytes -> {
APITransaction transaction = null;
try {
transaction = APITransaction.fromProtobuf(BCSAPIMessage.TX.parseFrom(bytes));
} catch (Exception e) {
log.error("Transaction message error", e);
}
return transaction;
},
transaction -> {
if (transaction != null)
try {
listener.process(transaction);
} catch (HyperLedgerException e) {
log.error("Error in transaction processing", e);
}
});
} catch (ConnectorException e) {
throw new BCSAPIException(e);
}
}
@Override
public void spendingTransactions(List<TID> tids, final TransactionListener listener)
throws BCSAPIException {
try (ConnectorSession session = connection.createSession()) {
ConnectorMessage m = session.createMessage();
ConnectorProducer scanAccountProducer =
session.createProducer(session.createQueue("spendingTransactions"));
BCSAPIMessage.Hash.Builder builder = BCSAPIMessage.Hash.newBuilder();
for (TID tid : tids) {
builder.addHash(ByteString.copyFrom(tid.unsafeGetArray()));
}
m.setPayload(builder.build().toByteArray());
final ConnectorTemporaryQueue answerQueue = session.createTemporaryQueue();
final ConnectorConsumer consumer = session.createConsumer(answerQueue);
m.setReplyTo(answerQueue);
final Semaphore ready = new Semaphore(0);
consumer.setMessageListener(
message -> {
try {
byte[] body = message.getPayload();
if (body != null) {
APITransaction t = APITransaction.fromProtobuf(BCSAPIMessage.TX.parseFrom(body));
listener.process(t);
} else {
consumer.close();
answerQueue.delete();
ready.release();
}
} catch (ConnectorException | HyperLedgerException | InvalidProtocolBufferException e) {
log.error("Malformed message received for spendingt ransactions request", e);
}
});
scanAccountProducer.send(m);
ready.acquireUninterruptibly();
} catch (ConnectorException e) {
throw new BCSAPIException(e);
}
}
private void scanRequest(
Collection<Script> match, final TransactionListener listener, String requestQueue)
throws BCSAPIException {
try (ConnectorSession session = connection.createSession()) {
ConnectorMessage m = session.createMessage();
ConnectorProducer exactMatchProducer =
session.createProducer(session.createQueue(requestQueue));
BCSAPIMessage.ExactMatchRequest.Builder builder =
BCSAPIMessage.ExactMatchRequest.newBuilder();
for (Script d : match) {
builder.addMatch(ByteString.copyFrom(d.toByteArray()));
}
m.setPayload(builder.build().toByteArray());
final ConnectorTemporaryQueue answerQueue = session.createTemporaryQueue();
final ConnectorConsumer consumer = session.createConsumer(answerQueue);
m.setReplyTo(answerQueue);
final Semaphore ready = new Semaphore(0);
consumer.setMessageListener(
message -> {
try {
byte[] body = message.getPayload();
if (body != null) {
APITransaction t = APITransaction.fromProtobuf(BCSAPIMessage.TX.parseFrom(body));
listener.process(t);
} else {
consumer.close();
answerQueue.delete();
ready.release();
}
} catch (ConnectorException | HyperLedgerException | InvalidProtocolBufferException e) {
log.error("Malformed message received for scan matching transactions", e);
}
});
exactMatchProducer.send(m);
ready.acquireUninterruptibly();
} catch (ConnectorException e) {
throw new BCSAPIException(e);
}
}
private void scanRequest(
MasterPublicKey master, int lookAhead, final TransactionListener listener, String request)
throws BCSAPIException {
try (ConnectorSession session = connection.createSession()) {
ConnectorMessage m = session.createMessage();
ConnectorProducer scanAccountProducer = session.createProducer(session.createQueue(request));
BCSAPIMessage.AccountRequest.Builder builder = BCSAPIMessage.AccountRequest.newBuilder();
builder.setPublicKey(master.serialize(true));
builder.setLookAhead(lookAhead);
m.setPayload(builder.build().toByteArray());
final ConnectorTemporaryQueue answerQueue = session.createTemporaryQueue();
final ConnectorConsumer consumer = session.createConsumer(answerQueue);
m.setReplyTo(answerQueue);
final Semaphore ready = new Semaphore(0);
consumer.setMessageListener(
message -> {
try {
byte[] body = message.getPayload();
if (body != null) {
APITransaction t = APITransaction.fromProtobuf(BCSAPIMessage.TX.parseFrom(body));
listener.process(t);
} else {
consumer.close();
answerQueue.delete();
ready.release();
}
} catch (ConnectorException | HyperLedgerException | InvalidProtocolBufferException e) {
log.error("Malformed message received for account scan transactions", e);
}
});
scanAccountProducer.send(m);
ready.acquireUninterruptibly();
} catch (ConnectorException e) {
throw new BCSAPIException(e);
}
}
@Override
public APITransaction getTransaction(TID hash) throws BCSAPIException {
log.trace("get transaction " + hash);
ConnectorMessage m;
try (ConnectorSession session = connection.createSession()) {
ConnectorProducer transactionRequestProducer =
session.createProducer(session.createQueue("transactionRequest"));
m = session.createMessage();
BCSAPIMessage.Hash.Builder builder = BCSAPIMessage.Hash.newBuilder();
builder.addHash(ByteString.copyFrom(hash.unsafeGetArray()));
m.setPayload(builder.build().toByteArray());
byte[] response = synchronousRequest(session, transactionRequestProducer, m);
if (response != null) {
APITransaction t;
t = APITransaction.fromProtobuf(BCSAPIMessage.TX.parseFrom(response));
return t;
}
} catch (ConnectorException | HyperLedgerException | InvalidProtocolBufferException e) {
throw new BCSAPIException(e);
}
return null;
}