@Override
public List<APITransaction> getInputTransactions(TID txId) throws BCSAPIException {
log.trace("get input transactions " + txId);
ConnectorMessage m;
try (ConnectorSession session = connection.createSession()) {
ConnectorProducer transactionRequestProducer =
session.createProducer(session.createQueue("inputTransactionsRequest"));
m = session.createMessage();
BCSAPIMessage.Hash.Builder builder = BCSAPIMessage.Hash.newBuilder();
builder.addHash(ByteString.copyFrom(txId.unsafeGetArray()));
m.setPayload(builder.build().toByteArray());
byte[] response = synchronousRequest(session, transactionRequestProducer, m);
if (response != null) {
List<BCSAPIMessage.OPTIONAL_TX> txsList =
BCSAPIMessage.TXS.parseFrom(response).getTxsList();
List<APITransaction> txs = new ArrayList<>(txsList.size());
for (BCSAPIMessage.OPTIONAL_TX tx : txsList) {
if (tx.getIsNull()) {
txs.add(null);
} else {
txs.add(APITransaction.fromProtobuf(tx.getTransaction()));
}
}
return txs;
}
} catch (ConnectorException | HyperLedgerException | InvalidProtocolBufferException e) {
throw new BCSAPIException(e);
}
return null;
}
@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);
}
}
@Override
public APIHeader getBlockHeader(BID hash) throws BCSAPIException {
try (ConnectorSession session = connection.createSession()) {
log.trace("get block header" + hash);
ConnectorProducer blockHeaderRequestProducer =
session.createProducer(session.createQueue("headerRequest"));
ConnectorMessage 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, blockHeaderRequestProducer, m);
if (response != null) {
return APIHeader.fromProtobuf(BCSAPIMessage.BLK.parseFrom(response));
}
} catch (ConnectorException | InvalidProtocolBufferException e) {
throw new BCSAPIException(e);
}
return null;
}
@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;
}