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Added Message Key as Channel ID for Inbound Transport #13

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Added Message Key as Channel ID for Inbound Transport #13

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24 changes: 14 additions & 10 deletions kafka-transport/src/main/java/com/esri/geoevent/transport/kafka/KafkaInboundTransport.java
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Original file line number Diff line number Diff line change
Expand Up @@ -41,6 +41,7 @@
import kafka.consumer.ConsumerIterator;
import kafka.consumer.KafkaStream;
import kafka.javaapi.consumer.ConsumerConnector;
import kafka.message.MessageAndMetadata;
import kafka.utils.ZKStringSerializer$;
import kafka.utils.ZkUtils;
import org.I0Itec.zkclient.ZkClient;
Expand Down Expand Up @@ -79,12 +80,14 @@ public void run()
{
try
{
byte[] bytes = consumer.receive();
if (bytes != null && bytes.length > 0) {
MessageAndMetadata<byte[], byte[]> mm = consumer.receive();
if (mm != null && mm.message().length > 0) {
byte[] bytes = mm.message();
String channelId = new String(mm.key());
ByteBuffer bb = ByteBuffer.allocate(bytes.length);
bb.put(bytes);
bb.flip();
byteListener.receive(bb, "");
byteListener.receive(bb, channelId);
bb.clear();
}
}
Expand Down Expand Up @@ -195,7 +198,7 @@ public void shutdown() {

private class KafkaEventConsumer extends KafkaComponentBase {
private Semaphore connectionLock;
private final BlockingQueue<byte[]> queue = new LinkedBlockingQueue<byte[]>();
private final BlockingQueue<MessageAndMetadata<byte[], byte[]>> queue = new LinkedBlockingQueue<>();
private ConsumerConnector consumer;
private ExecutorService executor;

Expand All @@ -216,7 +219,7 @@ private class KafkaEventConsumer extends KafkaComponentBase {
List<KafkaStream<byte[], byte[]>> streams = consumerMap.get(topic);
executor = Executors.newFixedThreadPool(numThreads);
int threadNumber = 0;
for (final KafkaStream stream : streams)
for (final KafkaStream<byte[], byte[]> stream : streams)
{
try
{
Expand All @@ -241,7 +244,7 @@ public synchronized void init() throws MessagingException
;
}

byte[] receive() throws MessagingException {
MessageAndMetadata<byte[], byte[]> receive() throws MessagingException {
// wait to receive messages if we are not connected
if (!isConnected())
{
Expand All @@ -254,16 +257,16 @@ byte[] receive() throws MessagingException {
; // ignored
}
}
byte[] bytes = null;
MessageAndMetadata<byte[], byte[]> mm = null;
try
{
bytes = queue.poll(100, TimeUnit.MILLISECONDS);
mm = queue.poll(100, TimeUnit.MILLISECONDS);
}
catch (Exception e)
{
; // ignore
}
return bytes;
return mm;
}

@Override
Expand Down Expand Up @@ -339,7 +342,8 @@ public void run() {
{
try
{
queue.offer(it.next().message(), 100, TimeUnit.MILLISECONDS);
MessageAndMetadata<byte[], byte[]> mm = it.next();
queue.offer(mm, 100, TimeUnit.MILLISECONDS);
}
catch (InterruptedException ex)
{
Expand Down