tillrohrmann commented on a change in pull request #8373:
[FLINK-11922][metrics] Support MetricReporter factories
URL: https://github.com/apache/flink/pull/8373#discussion_r282397203
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/metrics/ReporterSetup.java
##########
@@ -131,46 +137,119 @@ private static ReporterSetup createReporterSetup(String
reporterName, MetricConf
}
}
- List<Tuple2<String, Configuration>> reporterConfigurations;
-
if (namedReporters.isEmpty()) {
- reporterConfigurations = Collections.emptyList();
- } else {
- reporterConfigurations = new
ArrayList<>(namedReporters.size());
+ return Collections.emptyList();
+ }
- for (String namedReporter: namedReporters) {
- DelegatingConfiguration delegatingConfiguration
= new DelegatingConfiguration(
- configuration,
- ConfigConstants.METRICS_REPORTER_PREFIX
+ namedReporter + '.');
+ List<Tuple2<String, Configuration>> reporterConfigurations =
new ArrayList<>(namedReporters.size());
-
reporterConfigurations.add(Tuple2.of(namedReporter, (Configuration)
delegatingConfiguration));
- }
+ for (String namedReporter: namedReporters) {
+ DelegatingConfiguration delegatingConfiguration = new
DelegatingConfiguration(
+ configuration,
+ ConfigConstants.METRICS_REPORTER_PREFIX +
namedReporter + '.');
+
+ reporterConfigurations.add(Tuple2.of(namedReporter,
(Configuration) delegatingConfiguration));
}
+ final Collection<MetricReporterFactory> reporterFactories =
loadReporterFactories();
List<ReporterSetup> reporterArguments = new
ArrayList<>(reporterConfigurations.size());
for (Tuple2<String, Configuration> reporterConfiguration:
reporterConfigurations) {
String reporterName = reporterConfiguration.f0;
Configuration reporterConfig = reporterConfiguration.f1;
try {
- final String reporterClassName =
reporterConfig.getString(ConfigConstants.METRICS_REPORTER_CLASS_SUFFIX, null);
- if (reporterClassName == null) {
- LOG.error("No reporter class set for
reporter " + reporterName + ". Metrics might not be exposed/reported.");
- continue;
- }
-
- Class<?> reporterClass =
Class.forName(reporterClassName);
- MetricReporter reporter = (MetricReporter)
reporterClass.newInstance();
+ Optional<MetricReporter> metricReporterOptional
= loadReporter(reporterName, reporterConfig, reporterFactories);
+ if (metricReporterOptional.isPresent()) {
+ MetricReporter reporter =
metricReporterOptional.get();
- MetricConfig metricConfig = new MetricConfig();
- reporterConfig.addAllToProperties(metricConfig);
+ MetricConfig metricConfig = new
MetricConfig();
+
reporterConfig.addAllToProperties(metricConfig);
-
reporterArguments.add(createReporterSetup(reporterName, metricConfig,
reporter));
+
reporterArguments.add(createReporterSetup(reporterName, metricConfig,
reporter));
+ }
}
catch (Throwable t) {
LOG.error("Could not instantiate metrics
reporter {}. Metrics might not be exposed/reported.", reporterName, t);
}
}
return reporterArguments;
}
+
+ private static Collection<MetricReporterFactory>
loadReporterFactories() {
+ final ServiceLoader<MetricReporterFactory> serviceLoader =
ServiceLoader.load(MetricReporterFactory.class);
+
+ final Collection<MetricReporterFactory> reporterFactories = new
ArrayList<>();
Review comment:
Specify capacity.
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