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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package ai.vespa.metricsproxy.metric;
import ai.vespa.metricsproxy.service.VespaService;
import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.util.Locale;
/**
* Format metrics as required by users of the "getMetricsById" rpc method.
*
* @author Unknown
*/
public class MetricsFormatter {
private final boolean includeServiceName;
private final boolean isSystemMetric;
private final DecimalFormat df = new DecimalFormat("0.000", new DecimalFormatSymbols(Locale.ENGLISH));
public MetricsFormatter(boolean includeServiceName, boolean isSystemMetric) {
this.includeServiceName = includeServiceName;
this.isSystemMetric = isSystemMetric;
}
public String format(VespaService service, String name, Number value) {
StringBuilder sb = new StringBuilder();
if (includeServiceName) {
sb.append(service.getServiceName()).append(".");
}
if (isSystemMetric)
sb.append(toSystemServiceId(service.getConfigId()));
else
sb.append(toServiceId(service.getConfigId()));
sb.append(".")
.append(formatMetricName(name))
.append("=");
if (value instanceof Double) {
sb.append(df.format(value.doubleValue()));
} else {
sb.append(value.toString());
}
return sb.toString();
}
private static String formatMetricName(String name) {
name = name.replaceAll("\"", "");
name = name.replaceAll("\\.", "_");
return name;
}
// E.g. container/default.1 -> 'container.default.1'
private static String toServiceId(String configId) {
return "'" + configId.replace("/", ".") + "'";
}
// E.g. container/default.1 -> container.'default.1'
private static String toSystemServiceId(String configId) {
String name = configId.replace("/", ".");
name = name.replaceFirst("\\.", ".'") + "'";
return name;
}
}
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