Package com.google.cloud.pubsub.v1

Class OpenCensusUtil.OpenCensusMessageReceiver

java.lang.Object
com.google.cloud.pubsub.v1.OpenCensusUtil.OpenCensusMessageReceiver
All Implemented Interfaces:
MessageReceiver
Enclosing class:
OpenCensusUtil
public static class OpenCensusUtil.OpenCensusMessageReceiver extends Object implements MessageReceiver
Wrapper class for MessageReceiver that decodes any received trace and tag contexts and puts them in scope.

  • Constructor Details

    • OpenCensusMessageReceiver

      public OpenCensusMessageReceiver(MessageReceiver receiver)

  • Method Details

    • receiveMessage

      public void receiveMessage(PubsubMessage message, AckReplyConsumer consumer)
      Description copied from interface: MessageReceiver
      Called when a message is received by the subscriber. The implementation must arrange for AckReplyConsumer.ack() or AckReplyConsumer.nack() to be called after processing the message. 
      
 // This {@code MessageReceiver} passes all messages to a {@link BlockingQueue}. This method can
 // be called concurrently from multiple threads, so it is important that the queue be
 // thread-safe.
 //
 // This example is for illustration. Implementations may directly process messages instead of
 // sending them to queues.
 MessageReceiver receiver =
     new MessageReceiver() {
       public void receiveMessage(final PubsubMessage message, final AckReplyConsumer consumer) {
         if (blockingQueue.offer(message)) {
           consumer.ack();
         } else {
           consumer.nack();
         }
       }
     };
      Specified by:
      receiveMessage in interface MessageReceiver