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fix cause deadlock while use subscribeAsync demo in java client doc. #4649

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Jul 1, 2019
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fix cause deadlock while use subscribeAsync demo in java client doc. #4649

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18 changes: 8 additions & 10 deletions site2/docs/client-libraries-java.md
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Original file line number Diff line number Diff line change
Expand Up @@ -306,16 +306,14 @@ Pattern allTopicsInNamespace = Pattern.compile("persistent://public/default.*");
consumerBuilder
.topics(topics)
.subscribeAsync()
.thenAccept(consumer -> {
do {
try {
Message msg = consumer.receive();
// Do something with the received message
} catch (PulsarClientException e) {
e.printStackTrace();
}
} while (true);
});
.thenAccept(this::receiveMessageFromConsumer);

private void receiveMessageFromConsumer(Consumer consumer) {
consumer.receiveAsync().thenAccept(message -> {
// Do something with the received message
receiveMessageFromConsumer(consumer);
});
}
```

### Subscription modes
Expand Down