ReporterConfig.java 文件源码

/**
 * Gets a {@link MetricFilter} that specifically includes and excludes configured metrics. This method needs the
 * existing {@link MetricFilter} used to filter the disabled metrics. The includes and excludes will be checked
 * only for enabled metrics.
 *
 * @param enabledFilter The existing {@link MetricFilter} to filter disabled metrics.
 * @return the filter for selecting metrics based on the configured excludes/includes.
 * @throws ReporterBuildException if the pattern compilation failed for regular expressions.
 */
protected MetricFilter getFilter(MetricFilter enabledFilter) throws ReporterBuildException {
    if (includes.isEmpty() && excludes.isEmpty()) {
        return enabledFilter;
    }

    final StringMatchingStrategy stringMatchingStrategy;

    if (useRegexFilters) {
        stringMatchingStrategy = regexStringMatchingStrategy;
        compileAllRegex(getIncludes());
        compileAllRegex(getExcludes());
    } else {
        stringMatchingStrategy = defaultStringMatchingStrategy;
    }

    return (name, metric) -> {
        // Include the metric if its name is not excluded and its name is included
        // Where, by default, with no includes setting, all names are included.
        return enabledFilter.matches(name, metric) && !stringMatchingStrategy.containsMatch(getExcludes(), name) &&
                (getIncludes().isEmpty() || stringMatchingStrategy.containsMatch(getIncludes(), name));
    };
}