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Fix Dynatrace Exported to Generate DELTA Temporality #174

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Feb 28, 2024
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Fix Dynatrace Exported to Generate DELTA Temporality #174

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56 changes: 39 additions & 17 deletions ...sap/hcf/cf/logging/opentelemetry/agent/ext/exporter/DynatraceMetricsExporterProvider.java
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,7 @@
import io.pivotal.cfenv.core.CfService;

import java.time.Duration;
import java.util.Locale;
import java.util.function.Function;
import java.util.logging.Logger;

Expand Down Expand Up @@ -46,20 +47,39 @@ private static Duration getTimeOut(ConfigProperties config) {
return timeout != null ? timeout : config.getDuration("otel.exporter.dynatrace.timeout");
}

private static AggregationTemporalitySelector getAggregationTemporalitySelector(ConfigProperties config) {
String temporalityStr = config.getString("otel.exporter.dynatrace.metrics.temporality.preference");
if (temporalityStr == null) {
return AggregationTemporalitySelector.deltaPreferred();
}
AggregationTemporalitySelector temporalitySelector;
switch (temporalityStr.toLowerCase(Locale.ROOT)) {
case "cumulative":
return AggregationTemporalitySelector.alwaysCumulative();
case "delta":
return AggregationTemporalitySelector.deltaPreferred();
case "lowmemory":
return AggregationTemporalitySelector.lowMemory();
default:
throw new ConfigurationException("Unrecognized aggregation temporality: " + temporalityStr);
}
}

private static DefaultAggregationSelector getDefaultAggregationSelector(ConfigProperties config) {
String defaultHistogramAggregation =
config.getString("otel.exporter.dynatrace.metrics.default.histogram.aggregation");
if (defaultHistogramAggregation == null) {
return DefaultAggregationSelector.getDefault().with(InstrumentType.HISTOGRAM, Aggregation.defaultAggregation());
return DefaultAggregationSelector.getDefault()
.with(InstrumentType.HISTOGRAM, Aggregation.defaultAggregation());
}
if (AggregationUtil.aggregationName(Aggregation.base2ExponentialBucketHistogram())
.equalsIgnoreCase(defaultHistogramAggregation)) {
return
DefaultAggregationSelector.getDefault()
.with(InstrumentType.HISTOGRAM, Aggregation.base2ExponentialBucketHistogram());
.equalsIgnoreCase(defaultHistogramAggregation)) {
return DefaultAggregationSelector.getDefault().with(InstrumentType.HISTOGRAM,
Aggregation.base2ExponentialBucketHistogram());
} else if (AggregationUtil.aggregationName(explicitBucketHistogram())
.equalsIgnoreCase(defaultHistogramAggregation)) {
return DefaultAggregationSelector.getDefault().with(InstrumentType.HISTOGRAM, Aggregation.explicitBucketHistogram());
.equalsIgnoreCase(defaultHistogramAggregation)) {
return DefaultAggregationSelector.getDefault()
.with(InstrumentType.HISTOGRAM, Aggregation.explicitBucketHistogram());
} else {
throw new ConfigurationException(
"Unrecognized default histogram aggregation: " + defaultHistogramAggregation);
Expand All @@ -83,16 +103,19 @@ public MetricExporter createExporter(ConfigProperties config) {
return NoopMetricExporter.getInstance();
}

LOG.info("Creating metrics exporter for service binding " + cfService.getName() + " (" + cfService.getLabel() + ")");
LOG.info(
"Creating metrics exporter for service binding " + cfService.getName() + " (" + cfService.getLabel() + ")");

String apiUrl = cfService.getCredentials().getString(CRED_DYNATRACE_APIURL);
if (isBlank(apiUrl)) {
LOG.warning("Credential \"" + CRED_DYNATRACE_APIURL + "\" not found. Skipping dynatrace exporter configuration");
LOG.warning(
"Credential \"" + CRED_DYNATRACE_APIURL + "\" not found. Skipping dynatrace exporter configuration");
return NoopMetricExporter.getInstance();
}
String tokenName = config.getString("otel.javaagent.extension.sap.cf.binding.dynatrace.metrics.token-name");
if (isBlank(tokenName)) {
LOG.warning("Configuration \"otel.javaagent.extension.sap.cf.binding.dynatrace.metrics.token-name\" not found. Skipping dynatrace exporter configuration");
LOG.warning(
"Configuration \"otel.javaagent.extension.sap.cf.binding.dynatrace.metrics.token-name\" not found. Skipping dynatrace exporter configuration");
return NoopMetricExporter.getInstance();
}
String apiToken = cfService.getCredentials().getString(tokenName);
Expand All @@ -102,19 +125,18 @@ public MetricExporter createExporter(ConfigProperties config) {
}

OtlpHttpMetricExporterBuilder builder = OtlpHttpMetricExporter.builder();
builder.setEndpoint(apiUrl + DT_APIURL_METRICS_SUFFIX)
.setCompression(getCompression(config))
.addHeader("Authorization", "Api-Token " + apiToken)
.setRetryPolicy(RetryPolicy.getDefault())
.setAggregationTemporalitySelector(AggregationTemporalitySelector.alwaysCumulative())
.setDefaultAggregationSelector(getDefaultAggregationSelector(config));
builder.setEndpoint(apiUrl + DT_APIURL_METRICS_SUFFIX).setCompression(getCompression(config))
.addHeader("Authorization", "Api-Token " + apiToken).setRetryPolicy(RetryPolicy.getDefault())
.setAggregationTemporalitySelector(getAggregationTemporalitySelector(config))
.setDefaultAggregationSelector(getDefaultAggregationSelector(config));

Duration timeOut = getTimeOut(config);
if (timeOut != null) {
builder.setTimeout(timeOut);
}

LOG.info("Created metrics exporter for service binding " + cfService.getName() + " (" + cfService.getLabel() + ")");
LOG.info(
"Created metrics exporter for service binding " + cfService.getName() + " (" + cfService.getLabel() + ")");
return builder.build();
}

Expand Down