Github user zentol commented on a diff in the pull request: https://github.com/apache/flink/pull/2517#discussion_r80477622 --- Diff: flink-runtime/src/test/java/org/apache/flink/runtime/metrics/MetricRegistryTest.java --- @@ -280,4 +282,65 @@ public void testConfigurableDelimiter() { registry.shutdown(); } + + @Test + public void testConfigurableDelimiterForReporters() { + Configuration config = new Configuration(); + config.setString(ConfigConstants.METRICS_REPORTERS_LIST, "test1,test2,test3"); + config.setString(ConfigConstants.METRICS_REPORTER_PREFIX + "test1." + ConfigConstants.METRICS_REPORTER_SCOPE_DELIMITER, "_"); + config.setString(ConfigConstants.METRICS_REPORTER_PREFIX + "test1." + ConfigConstants.METRICS_REPORTER_CLASS_SUFFIX, TestReporter.class.getName()); + config.setString(ConfigConstants.METRICS_REPORTER_PREFIX + "test2." + ConfigConstants.METRICS_REPORTER_SCOPE_DELIMITER, "-"); + config.setString(ConfigConstants.METRICS_REPORTER_PREFIX + "test2." + ConfigConstants.METRICS_REPORTER_CLASS_SUFFIX, TestReporter.class.getName()); + config.setString(ConfigConstants.METRICS_REPORTER_PREFIX + "test3." + ConfigConstants.METRICS_REPORTER_SCOPE_DELIMITER, "AA"); + config.setString(ConfigConstants.METRICS_REPORTER_PREFIX + "test3." + ConfigConstants.METRICS_REPORTER_CLASS_SUFFIX, TestReporter.class.getName()); + + MetricRegistry registry = new MetricRegistry(config); + + assertEquals('.', registry.getDelimiter()); --- End diff -- introducing a static final char field for the global delimiter would improve readability.
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