codelipenghui commented on a change in pull request #9860:
URL: https://github.com/apache/pulsar/pull/9860#discussion_r591553296
##########
File path:
pulsar-client-tools/src/main/java/org/apache/pulsar/client/cli/CmdConsume.java
##########
@@ -404,4 +427,35 @@ public void close() {
private static final Logger log =
LoggerFactory.getLogger(ConsumerSocket.class);
}
+
+ private static class DataConsistencyChecker {
+ private final ConcurrentHashMap<String, AtomicLong> messagesPerKey =
new ConcurrentHashMap<>();
+ private final boolean failOnDuplicateKey;
+
+ public DataConsistencyChecker(boolean failOnDuplicateKey) {
+ this.failOnDuplicateKey = failOnDuplicateKey;
+ }
+
+ public void messageReceived(String key) throws Exception {
+ AtomicLong count = messagesPerKey.computeIfAbsent(key, k -> new
AtomicLong());
+ long newValue = count.incrementAndGet();
+ if (failOnDuplicateKey && newValue == 2) {
+ String message = "Key '"+key+"' has been received more than
once";
Review comment:
```suggestion
String message = "Key '" + key + "' has been received more
than once";
```
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