com.wavefront.predicates.Util Maven / Gradle / Ivy
package com.wavefront.predicates;
import java.util.Calendar;
import java.util.TimeZone;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import com.mdimension.jchronic.Chronic;
import com.mdimension.jchronic.Options;
import wavefront.report.*;
import static com.google.common.base.MoreObjects.firstNonNull;
import static com.wavefront.ingester.AbstractIngesterFormatter.unquote;
/**
* Miscellaneous utility methods used by parsers and preprocessors.
*
* @author [email protected].
*/
public abstract class Util {
private static final Pattern PLACEHOLDERS = Pattern.compile("\\{\\{(.*?)}}");
private Util() {
}
/**
* Parse a natural language time interval expression (e.g. "now", "10 minutes ago", etc)
*
* @param interval time interval to parse
* @param anchorTime anchor time in epoch millis
* @param timeZone time zone
* @return epoch millis
*/
public static long parseTextualTimeExact(String interval, long anchorTime, TimeZone timeZone) {
Calendar instance = Calendar.getInstance();
instance.setTimeZone(timeZone);
instance.setTimeInMillis(anchorTime);
com.mdimension.jchronic.utils.Span parse = Chronic.parse(unquote(interval),
new Options(instance));
if (parse == null) {
throw new IllegalArgumentException("Failed to parse " + interval + " as a time-expression");
}
return parse.getBeginCalendar().getTimeInMillis();
}
/**
* Substitute {{...}} placeholders with corresponding components of the point
* {{metricName}} {{sourceName}} are replaced with the metric name and source respectively
* {{anyTagK}} is replaced with the value of the anyTagK point tag
*
* @param input input string with {{...}} placeholders
* @param reportPoint ReportPoint object to extract components from
* @return string with substituted placeholders
*/
@Deprecated
public static String expandPlaceholders(String input, ReportPoint reportPoint) {
if (reportPoint != null && input.contains("{{")) {
StringBuffer result = new StringBuffer();
Matcher placeholders = PLACEHOLDERS.matcher(input);
while (placeholders.find()) {
if (placeholders.group(1).isEmpty()) {
placeholders.appendReplacement(result, placeholders.group(0));
} else {
String substitution;
switch (placeholders.group(1)) {
case "metricName":
substitution = reportPoint.getMetric();
break;
case "sourceName":
substitution = reportPoint.getHost();
break;
default:
substitution = reportPoint.getAnnotations().get(placeholders.group(1));
}
placeholders.appendReplacement(result, firstNonNull(substitution, ""));
}
}
placeholders.appendTail(result);
return result.toString();
}
return input;
}
/**
* Substitute {{...}} placeholders with corresponding components of the point
* {{metricName}} {{sourceName}} are replaced with the metric name and source respectively
* {{anyTagK}} is replaced with the value of the anyTagK point tag
*
* @param input input string with {{...}} placeholders
* @param reportMetric ReportMetric object to extract components from
* @return string with substituted placeholders
*/
public static String expandPlaceholders(String input, ReportMetric reportMetric) {
if (reportMetric != null && input.contains("{{")) {
StringBuffer result = new StringBuffer();
Matcher placeholders = PLACEHOLDERS.matcher(input);
while (placeholders.find()) {
if (placeholders.group(1).isEmpty()) {
placeholders.appendReplacement(result, placeholders.group(0));
} else {
String substitution;
switch (placeholders.group(1)) {
case "metricName":
substitution = reportMetric.getMetric();
break;
case "sourceName":
substitution = reportMetric.getHost();
break;
default:
substitution = reportMetric.getAnnotations().stream().
filter(a -> a.getKey().equals(placeholders.group(1))).
map(Annotation::getValue).findFirst().orElse(null);
}
placeholders.appendReplacement(result, firstNonNull(substitution, ""));
}
}
placeholders.appendTail(result);
return result.toString();
}
return input;
}
/**
* Substitute {{...}} placeholders with corresponding components of the histogram
* {{metricName}} {{sourceName}} are replaced with the metric name and source respectively
* {{anyTagK}} is replaced with the value of the anyTagK point tag
*
* @param input input string with {{...}} placeholders
* @param reportHistogram ReportHistogram object to extract components from
* @return string with substituted placeholders
*/
public static String expandPlaceholders(String input, ReportHistogram reportHistogram) {
if (reportHistogram != null && input.contains("{{")) {
StringBuffer result = new StringBuffer();
Matcher placeholders = PLACEHOLDERS.matcher(input);
while (placeholders.find()) {
if (placeholders.group(1).isEmpty()) {
placeholders.appendReplacement(result, placeholders.group(0));
} else {
String substitution;
switch (placeholders.group(1)) {
case "metricName":
substitution = reportHistogram.getMetric();
break;
case "sourceName":
substitution = reportHistogram.getHost();
break;
default:
substitution = reportHistogram.getAnnotations().stream().
filter(a -> a.getKey().equals(placeholders.group(1))).
map(Annotation::getValue).findFirst().orElse(null);
}
placeholders.appendReplacement(result, firstNonNull(substitution, ""));
}
}
placeholders.appendTail(result);
return result.toString();
}
return input;
}
/**
* Substitute {{...}} placeholders with corresponding components of a Span
* {{spanName}} {{sourceName}} are replaced with the span name and source respectively
* {{anyKey}} is replaced with the value of an annotation with anyKey key
*
* @param input input string with {{...}} placeholders
* @param span Span object to extract components from
* @return string with substituted placeholders
*/
public static String expandPlaceholders(String input, Span span) {
if (span != null && input.contains("{{")) {
StringBuffer result = new StringBuffer();
Matcher placeholders = PLACEHOLDERS.matcher(input);
while (placeholders.find()) {
if (placeholders.group(1).isEmpty()) {
placeholders.appendReplacement(result, placeholders.group(0));
} else {
String substitution;
switch (placeholders.group(1)) {
case "spanName":
substitution = span.getName();
break;
case "sourceName":
substitution = span.getSource();
break;
default:
substitution = span.getAnnotations().stream().
filter(a -> a.getKey().equals(placeholders.group(1))).
map(Annotation::getValue).findFirst().orElse(null);
}
placeholders.appendReplacement(result, firstNonNull(substitution, ""));
}
}
placeholders.appendTail(result);
return result.toString();
}
return input;
}
/**
* Substitute {{...}} placeholders with corresponding components of the log
* {{message}} {{sourceName}} are replaced with the message and source respectively
* {{anyTagK}} is replaced with the value of the anyTagK point tag
*
* @param input input string with {{...}} placeholders
* @param reportLog ReportLog object to extract components from
* @return string with substituted placeholders
*/
public static String expandPlaceholders(String input, ReportLog reportLog) {
if (reportLog != null && input.contains("{{")) {
StringBuffer result = new StringBuffer();
Matcher placeholders = PLACEHOLDERS.matcher(input);
while (placeholders.find()) {
if (placeholders.group(1).isEmpty()) {
placeholders.appendReplacement(result, placeholders.group(0));
} else {
String substitution;
switch (placeholders.group(1)) {
case "message":
substitution = reportLog.getMessage();
break;
case "sourceName":
substitution = reportLog.getHost();
break;
default:
substitution = reportLog.getAnnotations().stream().
filter(a -> a.getKey().equals(placeholders.group(1))).
map(Annotation::getValue).findFirst().orElse(null);
}
placeholders.appendReplacement(result, firstNonNull(substitution, ""));
}
}
placeholders.appendTail(result);
return result.toString();
}
return input;
}
}
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