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Add --no-latency flag #302

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Merged
merged 1 commit into from
Sep 9, 2025
Merged

Add --no-latency flag #302

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40 changes: 31 additions & 9 deletions src/main/java/com/rabbitmq/stream/perf/StreamPerfTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -595,6 +595,18 @@ void setIncludeByteSizeMetric(String input) throws Exception {

volatile boolean includeBatchSizeMetric;

@CommandLine.Option(
names = {"--no-latency", "-nl"},
description = "no latency calculation",
arity = "0..1",
fallbackValue = "true",
defaultValue = "false")
void setNoLatency(String input) throws Exception {
this.noLatency = Converters.BOOLEAN_TYPE_CONVERTER.convert(input);
}

volatile boolean noLatency;

static class InstanceSyncOptions {

@CommandLine.Option(
Expand Down Expand Up @@ -1342,19 +1354,29 @@ public Integer call() throws Exception {
messageReceivedCallback = ctx -> {};
}

java.util.function.Consumer<Message> latencyCallback;
if (this.noLatency) {
latencyCallback = ignored -> {};
} else {
latencyCallback =
msg -> {
try {
long time = Utils.readLong(msg.getBodyAsBinary());
// see above why we use current time to measure latency
metrics.latency(
System.currentTimeMillis() - time, TimeUnit.MILLISECONDS);
} catch (Exception e) {
// not able to read the body, maybe not a message from the
// tool
}
};
}

Runnable latencyWorker = Utils.latencyWorker(this.consumerLatency);
consumerBuilder =
consumerBuilder.messageHandler(
(context, message) -> {
try {
long time = Utils.readLong(message.getBodyAsBinary());
// see above why we use current time to measure latency
metrics.latency(
System.currentTimeMillis() - time, TimeUnit.MILLISECONDS);
} catch (Exception e) {
// not able to read the body, maybe not a message from the
// tool
}
latencyCallback.accept(message);
metrics.offset(context.offset());
messageReceivedCallback.accept(context);
latencyWorker.run();
Expand Down
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