public Message getWithoutAck(int batchSize) throws CanalClientException {
waitClientRunning();
try {
int size = (batchSize <= 0) ? 1000 : batchSize;
writeWithHeader(
channel,
Packet.newBuilder()
.setType(PacketType.GET)
.setBody(
Get.newBuilder()
.setDestination(clientIdentity.getDestination())
.setClientId(String.valueOf(clientIdentity.getClientId()))
.setFetchSize(size)
.build()
.toByteString())
.build()
.toByteArray());
//
Packet p = Packet.parseFrom(readNextPacket(channel));
switch (p.getType()) {
case MESSAGES:
{
if (!p.getCompression().equals(Compression.NONE)) {
throw new CanalClientException("compression is not supported in this connector");
}
Messages messages = Messages.parseFrom(p.getBody());
Message result = new Message(messages.getBatchId());
for (ByteString byteString : messages.getMessagesList()) {
result.addEntry(Entry.parseFrom(byteString));
}
return result;
}
case ACK:
{
Ack ack = Ack.parseFrom(p.getBody());
throw new CanalClientException(
"something goes wrong with reason: " + ack.getErrorMessage());
}
default:
{
throw new CanalClientException("unexpected packet type: " + p.getType());
}
}
} catch (IOException e) {
throw new CanalClientException(e);
}
}
