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Let VertexAPI use simplified property serializer
Implement #307 Change-Id: I7e47b75160ff240157aec30c1e9b4690a3412e4e
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251
hugegraph-api/src/main/java/com/baidu/hugegraph/metric/MetricsModule.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,251 @@ | ||
| package com.baidu.hugegraph.metric; | ||
|
|
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| import java.io.IOException; | ||
| import java.util.Arrays; | ||
| import java.util.Locale; | ||
| import java.util.concurrent.TimeUnit; | ||
|
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| import org.apache.tinkerpop.shaded.jackson.core.JsonGenerator; | ||
| import org.apache.tinkerpop.shaded.jackson.core.Version; | ||
| import org.apache.tinkerpop.shaded.jackson.databind.Module; | ||
| import org.apache.tinkerpop.shaded.jackson.databind.SerializerProvider; | ||
| import org.apache.tinkerpop.shaded.jackson.databind.module.SimpleSerializers; | ||
| import org.apache.tinkerpop.shaded.jackson.databind.ser.std.StdSerializer; | ||
|
|
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| import com.codahale.metrics.Counter; | ||
| import com.codahale.metrics.Gauge; | ||
| import com.codahale.metrics.Histogram; | ||
| import com.codahale.metrics.Meter; | ||
| import com.codahale.metrics.MetricFilter; | ||
| import com.codahale.metrics.MetricRegistry; | ||
| import com.codahale.metrics.Snapshot; | ||
| import com.codahale.metrics.Timer; | ||
|
|
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| /** | ||
| * Copy from com.codahale.metrics.json.MetricsModule | ||
| */ | ||
| public class MetricsModule extends Module { | ||
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| private static final Version VERSION = new Version(1, 0, 0, "", | ||
| "com.baidu.hugegraph", | ||
| "hugegraph-api"); | ||
|
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| private static class GaugeSerializer extends StdSerializer<Gauge> { | ||
|
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| private GaugeSerializer() { | ||
| super(Gauge.class); | ||
| } | ||
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| @Override | ||
| public void serialize(Gauge gauge, JsonGenerator json, | ||
| SerializerProvider provider) throws IOException { | ||
| json.writeStartObject(); | ||
| final Object value; | ||
| try { | ||
| value = gauge.getValue(); | ||
| json.writeObjectField("value", value); | ||
| } catch (RuntimeException e) { | ||
| json.writeObjectField("error", e.toString()); | ||
| } | ||
| json.writeEndObject(); | ||
| } | ||
| } | ||
|
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| private static class CounterSerializer extends StdSerializer<Counter> { | ||
|
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| private CounterSerializer() { | ||
| super(Counter.class); | ||
| } | ||
|
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| @Override | ||
| public void serialize(Counter counter, JsonGenerator json, | ||
| SerializerProvider provider) throws IOException { | ||
| json.writeStartObject(); | ||
| json.writeNumberField("count", counter.getCount()); | ||
| json.writeEndObject(); | ||
| } | ||
| } | ||
|
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| private static class HistogramSerializer extends StdSerializer<Histogram> { | ||
|
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| private final boolean showSamples; | ||
|
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| private HistogramSerializer(boolean showSamples) { | ||
| super(Histogram.class); | ||
| this.showSamples = showSamples; | ||
| } | ||
|
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| @Override | ||
| public void serialize(Histogram histogram, JsonGenerator json, | ||
| SerializerProvider provider) throws IOException { | ||
| json.writeStartObject(); | ||
| final Snapshot snapshot = histogram.getSnapshot(); | ||
| json.writeNumberField("count", histogram.getCount()); | ||
| json.writeNumberField("max", snapshot.getMax()); | ||
| json.writeNumberField("mean", snapshot.getMean()); | ||
| json.writeNumberField("min", snapshot.getMin()); | ||
| json.writeNumberField("p50", snapshot.getMedian()); | ||
| json.writeNumberField("p75", snapshot.get75thPercentile()); | ||
| json.writeNumberField("p95", snapshot.get95thPercentile()); | ||
| json.writeNumberField("p98", snapshot.get98thPercentile()); | ||
| json.writeNumberField("p99", snapshot.get99thPercentile()); | ||
| json.writeNumberField("p999", snapshot.get999thPercentile()); | ||
|
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| if (showSamples) { | ||
| json.writeObjectField("values", snapshot.getValues()); | ||
| } | ||
|
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| json.writeNumberField("stddev", snapshot.getStdDev()); | ||
| json.writeEndObject(); | ||
| } | ||
| } | ||
|
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| private static class MeterSerializer extends StdSerializer<Meter> { | ||
|
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| private final String rateUnit; | ||
| private final double rateFactor; | ||
|
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| public MeterSerializer(TimeUnit rateUnit) { | ||
| super(Meter.class); | ||
| this.rateFactor = rateUnit.toSeconds(1); | ||
| this.rateUnit = calculateRateUnit(rateUnit, "events"); | ||
| } | ||
|
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| @Override | ||
| public void serialize(Meter meter, JsonGenerator json, | ||
| SerializerProvider provider) throws IOException { | ||
| json.writeStartObject(); | ||
| json.writeNumberField("count", meter.getCount()); | ||
| json.writeNumberField("m15_rate", meter.getFifteenMinuteRate() * rateFactor); | ||
| json.writeNumberField("m1_rate", meter.getOneMinuteRate() * rateFactor); | ||
| json.writeNumberField("m5_rate", meter.getFiveMinuteRate() * rateFactor); | ||
| json.writeNumberField("mean_rate", meter.getMeanRate() * rateFactor); | ||
| json.writeStringField("units", rateUnit); | ||
| json.writeEndObject(); | ||
| } | ||
| } | ||
|
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| private static class TimerSerializer extends StdSerializer<Timer> { | ||
|
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| private final String rateUnit; | ||
| private final double rateFactor; | ||
| private final String durationUnit; | ||
| private final double durationFactor; | ||
| private final boolean showSamples; | ||
|
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| private TimerSerializer(TimeUnit rateUnit, TimeUnit durationUnit, | ||
| boolean showSamples) { | ||
| super(Timer.class); | ||
| this.rateUnit = calculateRateUnit(rateUnit, "calls"); | ||
| this.rateFactor = rateUnit.toSeconds(1); | ||
| this.durationUnit = durationUnit.toString().toLowerCase(Locale.US); | ||
| this.durationFactor = 1.0 / durationUnit.toNanos(1); | ||
| this.showSamples = showSamples; | ||
| } | ||
|
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| @Override | ||
| public void serialize(Timer timer, JsonGenerator json, | ||
| SerializerProvider provider) throws IOException { | ||
| json.writeStartObject(); | ||
| final Snapshot snapshot = timer.getSnapshot(); | ||
| json.writeNumberField("count", timer.getCount()); | ||
| json.writeNumberField("max", snapshot.getMax() * durationFactor); | ||
| json.writeNumberField("mean", snapshot.getMean() * durationFactor); | ||
| json.writeNumberField("min", snapshot.getMin() * durationFactor); | ||
|
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| json.writeNumberField("p50", snapshot.getMedian() * durationFactor); | ||
| json.writeNumberField("p75", snapshot.get75thPercentile() * durationFactor); | ||
| json.writeNumberField("p95", snapshot.get95thPercentile() * durationFactor); | ||
| json.writeNumberField("p98", snapshot.get98thPercentile() * durationFactor); | ||
| json.writeNumberField("p99", snapshot.get99thPercentile() * durationFactor); | ||
| json.writeNumberField("p999", snapshot.get999thPercentile() * durationFactor); | ||
|
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| if (showSamples) { | ||
| final long[] values = snapshot.getValues(); | ||
| final double[] scaledValues = new double[values.length]; | ||
| for (int i = 0; i < values.length; i++) { | ||
| scaledValues[i] = values[i] * durationFactor; | ||
| } | ||
| json.writeObjectField("values", scaledValues); | ||
| } | ||
|
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| json.writeNumberField("stddev", snapshot.getStdDev() * durationFactor); | ||
| json.writeNumberField("m15_rate", timer.getFifteenMinuteRate() * rateFactor); | ||
| json.writeNumberField("m1_rate", timer.getOneMinuteRate() * rateFactor); | ||
| json.writeNumberField("m5_rate", timer.getFiveMinuteRate() * rateFactor); | ||
| json.writeNumberField("mean_rate", timer.getMeanRate() * rateFactor); | ||
| json.writeStringField("duration_units", durationUnit); | ||
| json.writeStringField("rate_units", rateUnit); | ||
| json.writeEndObject(); | ||
| } | ||
| } | ||
|
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| private static class MetricRegistrySerializer | ||
| extends StdSerializer<MetricRegistry> { | ||
|
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| private final MetricFilter filter; | ||
|
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| private MetricRegistrySerializer(MetricFilter filter) { | ||
| super(MetricRegistry.class); | ||
| this.filter = filter; | ||
| } | ||
|
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| @Override | ||
| public void serialize(MetricRegistry registry, JsonGenerator json, | ||
| SerializerProvider provider) throws IOException { | ||
| json.writeStartObject(); | ||
| json.writeStringField("version", VERSION.toString()); | ||
| json.writeObjectField("gauges", registry.getGauges(filter)); | ||
| json.writeObjectField("counters", registry.getCounters(filter)); | ||
| json.writeObjectField("histograms", registry.getHistograms(filter)); | ||
| json.writeObjectField("meters", registry.getMeters(filter)); | ||
| json.writeObjectField("timers", registry.getTimers(filter)); | ||
| json.writeEndObject(); | ||
| } | ||
| } | ||
|
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| private final TimeUnit rateUnit; | ||
| private final TimeUnit durationUnit; | ||
| private final boolean showSamples; | ||
| private final MetricFilter filter; | ||
|
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| public MetricsModule(TimeUnit rateUnit, TimeUnit durationUnit, | ||
| boolean showSamples) { | ||
| this(rateUnit, durationUnit, showSamples, MetricFilter.ALL); | ||
| } | ||
|
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| public MetricsModule(TimeUnit rateUnit, TimeUnit durationUnit, | ||
| boolean showSamples, MetricFilter filter) { | ||
| this.rateUnit = rateUnit; | ||
| this.durationUnit = durationUnit; | ||
| this.showSamples = showSamples; | ||
| this.filter = filter; | ||
| } | ||
|
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| @Override | ||
| public String getModuleName() { | ||
| return "metrics"; | ||
| } | ||
|
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| @Override | ||
| public Version version() { | ||
| return VERSION; | ||
| } | ||
|
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| @Override | ||
| public void setupModule(Module.SetupContext context) { | ||
| context.addSerializers(new SimpleSerializers(Arrays.asList( | ||
| new GaugeSerializer(), | ||
| new CounterSerializer(), | ||
| new HistogramSerializer(showSamples), | ||
| new MeterSerializer(rateUnit), | ||
| new TimerSerializer(rateUnit, durationUnit, showSamples), | ||
| new MetricRegistrySerializer(filter) | ||
| ))); | ||
| } | ||
|
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| private static String calculateRateUnit(TimeUnit unit, String name) { | ||
| final String s = unit.toString().toLowerCase(Locale.US); | ||
| return name + '/' + s.substring(0, s.length() - 1); | ||
| } | ||
| } |
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