Ethanlm commented on a change in pull request #3329:
URL: https://github.com/apache/storm/pull/3329#discussion_r489883300
##########
File path:
storm-client/src/jvm/org/apache/storm/metrics2/StormMetricRegistry.java
##########
@@ -171,6 +188,59 @@ public Histogram histogram(String name, TopologyContext
context) {
metrics.put(names.getV2TickName(), metric);
}
+ private <T> Gauge<T> registerGauge(String name, MetricNames metricNames,
Gauge<T> gauge, int taskId,
+ String componentId, String streamId) {
+ TaskMetricDimensions taskMetricDimensions = new
TaskMetricDimensions(taskId, componentId, streamId, this);
+ synchronized (this) {
Review comment:
Why do we need `synchronized`?
If there are two threads trying to register the same metric,
line198 `gauge = registry.register(metricNames.getLongName(), gauge);` will
throw `IllegalArgumentException`. (what's interesting is if registry.gauge() or
registry.meter() etc. method is invoked, it will check and return the existing
object if possible)
It implies this `registerGauge` can only be invoked once for each long name.
##########
File path:
storm-client/src/jvm/org/apache/storm/metrics2/StormMetricRegistry.java
##########
@@ -171,6 +188,59 @@ public Histogram histogram(String name, TopologyContext
context) {
metrics.put(names.getV2TickName(), metric);
}
+ private <T> Gauge<T> registerGauge(String name, MetricNames metricNames,
Gauge<T> gauge, int taskId,
+ String componentId, String streamId) {
+ TaskMetricDimensions taskMetricDimensions = new
TaskMetricDimensions(taskId, componentId, streamId, this);
+ synchronized (this) {
+ TaskMetricRepo repo =
taskMetrics.computeIfAbsent(taskMetricDimensions, (k) -> new TaskMetricRepo());
+ repo.addGauge(name, gauge);
Review comment:
Can we use `metricNames.getV2TickName` instead of `name`? It seems code
duplication to pass this `name` parameter?
I would also change `metricNames.getV2TickName` to
`metricNames.getShortName` since it is not only about v2 tick anymore.
And we need to update comments at
https://github.com/apache/storm/blob/master/storm-client/src/jvm/org/apache/storm/metrics2/StormMetricRegistry.java#L316-L317
##########
File path:
storm-client/src/jvm/org/apache/storm/metrics2/StormMetricRegistry.java
##########
@@ -198,14 +268,17 @@ public Histogram histogram(String name, TopologyContext
context) {
return getMetricNameMap(taskId, taskIdTimers);
}
- public void start(Map<String, Object> topoConf) {
+ public void start(Map<String, Object> topoConf, int port) {
try {
hostName = dotToUnderScore(Utils.localHostname());
} catch (UnknownHostException e) {
LOG.warn("Unable to determine hostname while starting the metrics
system. Hostname will be reported"
+ " as 'localhost'.");
}
+ this.topologyName = (String) topoConf.get(Config.TOPOLOGY_NAME);
Review comment:
should we use `topologyId` since we use topologyId in the long name
##########
File path:
storm-client/src/jvm/org/apache/storm/metrics2/reporters/StormReporter.java
##########
@@ -15,12 +15,15 @@
import com.codahale.metrics.MetricRegistry;
import com.codahale.metrics.Reporter;
import java.util.Map;
+import org.apache.storm.metrics2.StormMetricRegistry;
public interface StormReporter extends Reporter {
String REPORT_PERIOD = "report.period";
String REPORT_PERIOD_UNITS = "report.period.units";
+ String REPORT_DIMENSIONS_ENABLED = "report.dimensions.enabled";
- void prepare(MetricRegistry metricsRegistry, Map<String, Object> topoConf,
Map<String, Object> reporterConf);
+ void prepare(MetricRegistry metricsRegistry, Map<String, Object> topoConf,
Map<String, Object> reporterConf,
Review comment:
The interface change is concerning. It breaks backwards compatibility.
##########
File path:
storm-client/src/jvm/org/apache/storm/metrics2/reporters/ScheduledStormReporter.java
##########
@@ -37,6 +37,10 @@ public static long getReportPeriod(Map<String, Object>
reporterConf) {
return ObjectReader.getInt(reporterConf.get(REPORT_PERIOD),
10).longValue();
}
+ public static boolean getReportDimensions(Map<String, Object>
reporterConf) {
Review comment:
I would suggest to change this to `getReportDimensionsEnabled` or
`isReportDimensionsEnabled`
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