Consolidation of the PR
This commit is contained in:
Guillaume Polaert
parent
97f7ed4b50
commit
ad8ad680bf
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@ -32,13 +32,13 @@ public class DDSpan implements io.opentracing.Span {
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/**
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* StartTime stores the creation time of the span in milliseconds
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*/
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protected long startTime;
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protected long startTimeMicro;
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/**
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* StartTimeNano stores the only the nanoseconds for more accuracy
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*/
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protected long startTimeNano;
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/**
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* The duration in nanoseconds computed using the startTime and startTimeNano
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* The duration in nanoseconds computed using the startTimeMicro and startTimeNano
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*/
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protected long durationNano;
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/**
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@ -54,13 +54,13 @@ public class DDSpan implements io.opentracing.Span {
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*
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* @param operationName the operation name associated to the span
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* @param tags Tags attached to the span
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* @param timestampMilliseconds if set, use this time instead of the auto-generated time
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* @param timestampMicro if set, use this time instead of the auto-generated time
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* @param context the context
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*/
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protected DDSpan(
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String operationName,
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Map<String, Object> tags,
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long timestampMilliseconds,
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long timestampMicro,
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DDSpanContext context) {
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this.operationName = operationName;
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@ -68,10 +68,10 @@ public class DDSpan implements io.opentracing.Span {
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this.context = context;
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// record the start time in nano (current milli + nano delta)
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if (timestampMilliseconds == 0L) {
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this.startTime = System.currentTimeMillis();
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if (timestampMicro == 0L) {
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this.startTimeMicro = System.currentTimeMillis() * 1000L;
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} else {
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this.startTime = timestampMilliseconds;
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this.startTimeMicro = timestampMicro;
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}
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this.startTimeNano = System.nanoTime();
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@ -96,7 +96,7 @@ public class DDSpan implements io.opentracing.Span {
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* @see io.opentracing.Span#finish(long)
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*/
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public void finish(long stoptimeMicros) {
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this.durationNano = stoptimeMicros * 1000L - this.startTime * 1000000L;
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this.durationNano = stoptimeMicros * 1000L - this.startTimeMicro * 1000L;
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afterFinish();
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}
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@ -226,16 +226,19 @@ public class DDSpan implements io.opentracing.Span {
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* @see io.opentracing.Span#log(java.lang.String, java.lang.Object)
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*/
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public Span log(String s, Object o) {
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return null;
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logger.debug("`log` method is not implemented. Doing nothing");
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return this;
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}
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/* (non-Javadoc)
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* @see io.opentracing.Span#log(long, java.lang.String, java.lang.Object)
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*/
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public Span log(long l, String s, Object o) {
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return null;
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logger.debug("`log` method is not implemented. Doing nothing");
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return this;
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}
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//Getters and JSON serialisation instructions
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@JsonGetter(value = "name")
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public String getOperationName() {
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@ -266,7 +269,7 @@ public class DDSpan implements io.opentracing.Span {
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@JsonGetter(value = "start")
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public long getStartTime() {
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return startTime * 1000000L;
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return startTimeMicro * 1000L;
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}
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@JsonGetter(value = "duration")
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@ -48,11 +48,14 @@ public class DDTracer implements io.opentracing.Tracer {
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}
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public <C> void inject(SpanContext spanContext, Format<C> format, C c) {
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throw new UnsupportedOperationException();
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//FIXME Implement it ASAP
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logger.warn("Method `inject` not implemented yet");
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}
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public <C> SpanContext extract(Format<C> format, C c) {
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throw new UnsupportedOperationException();
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//FIXME Implement it ASAP
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logger.warn("Method `inject` not implemented yet");
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return null;
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}
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@ -98,7 +101,7 @@ public class DDTracer implements io.opentracing.Tracer {
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public DDSpan start() {
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// build the context
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DDSpanContext context = buildTheSpanContext();
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DDSpanContext context = buildSpanContext();
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DDSpan span = new DDSpan(this.operationName, this.tags, this.timestamp, context);
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logger.debug("Starting a new span. " + span.toString());
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@ -166,7 +169,8 @@ public class DDTracer implements io.opentracing.Tracer {
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}
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public DDTracer.DDSpanBuilder addReference(String referenceType, SpanContext spanContext) {
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throw new UnsupportedOperationException();
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logger.debug("`addReference` method is not implemented. Doing nothing");
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return this;
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}
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// Private methods
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@ -184,25 +188,36 @@ public class DDTracer implements io.opentracing.Tracer {
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* - ServiceName
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* - Baggage
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* - Trace (a list of all spans related)
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* - SpanType
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*
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* @return
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* @return the context
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*/
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private DDSpanContext buildTheSpanContext() {
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private DDSpanContext buildSpanContext() {
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long generatedId = generateNewId();
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DDSpanContext context;
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DDSpanContext p = this.parent != null ? (DDSpanContext) this.parent : null;
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String spanType = this.spanType;
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if (spanType == null && this.parent != null) {
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spanType = p.getSpanType();
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}
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String serviceName = this.serviceName;
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if (serviceName == null && this.parent != null) {
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serviceName = p.getServiceName();
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}
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// some attributes are inherited from the parent
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context = new DDSpanContext(
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this.parent == null ? generatedId : p.getTraceId(),
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generatedId,
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this.parent == null ? 0L : p.getSpanId(),
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this.parent == null ? this.serviceName : p.getServiceName(),
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serviceName,
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this.resourceName,
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this.parent == null ? null : p.getBaggageItems(),
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errorFlag,
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this.spanType,
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spanType,
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this.parent == null ? null : p.getTrace(),
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DDTracer.this
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);
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@ -109,36 +109,4 @@ public class DDApi {
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}
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}
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public static void main(String[] args) throws Exception {
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DDTracer tracer = new DDTracer();
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Span parent = tracer
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.buildSpan("hello-world")
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.withServiceName("service-name")
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.start();
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parent.setBaggageItem("a-baggage", "value");
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Thread.sleep(1000);
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Span child = tracer
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.buildSpan("hello-world")
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.asChildOf(parent)
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.start();
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Thread.sleep(1000);
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child.finish();
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Thread.sleep(1000);
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parent.finish();
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Thread.sleep(1000);
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}
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}
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@ -0,0 +1,53 @@
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import com.datadoghq.trace.Sampler;
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import com.datadoghq.trace.Writer;
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import com.datadoghq.trace.impl.AllSampler;
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import com.datadoghq.trace.impl.DDTracer;
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import com.datadoghq.trace.writer.impl.DDAgentWriter;
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import io.opentracing.Span;
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public class ExampleWithDDAgentWriter {
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public static void main(String[] args) throws Exception {
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// Instantiate the DDWriter
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// By default, traces are written to localhost:8126 (the ddagent)
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Writer writer = new DDAgentWriter();
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// Instantiate the proper Sampler
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// - RateSampler if you want to keep `ratio` traces
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// - AllSampler to keep all traces
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Sampler sampler = new AllSampler();
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// Create the tracer
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DDTracer tracer = new DDTracer(writer, sampler);
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Span parent = tracer
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.buildSpan("hello-world")
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.withServiceName("service-name")
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.withSpanType("web")
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.start();
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Thread.sleep(100);
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parent.setBaggageItem("a-baggage", "value");
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Span child = tracer
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.buildSpan("hello-world")
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.asChildOf(parent)
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.withResourceName("resource-name")
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.start();
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Thread.sleep(100);
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child.finish();
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Thread.sleep(100);
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parent.finish();
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writer.close();
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}
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}
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@ -7,14 +7,12 @@ import com.datadoghq.trace.writer.impl.DDAgentWriter;
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import io.opentracing.Span;
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public class Example {
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public class ExampleWithLoggingWriter {
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public static void main(String[] args) throws Exception {
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DDTracer tracer = new DDTracer();
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Span parent = tracer
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.buildSpan("hello-world")
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.withServiceName("service-name")
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@ -23,6 +21,7 @@ public class Example {
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parent.setBaggageItem("a-baggage", "value");
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Thread.sleep(100);
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Span child = tracer
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.buildSpan("hello-world")
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@ -30,11 +29,13 @@ public class Example {
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.withResourceName("resource-name")
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.start();
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Thread.sleep(100);
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child.finish();
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Thread.sleep(100);
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parent.finish();
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}
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}
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@ -94,7 +94,8 @@ public class DDSpanBuilderTest {
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@Test
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public void shouldBuildSpanTimestampInNano() {
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final long expectedTimestamp = 4875178020000L;
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// time in micro
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final long expectedTimestamp = 487517802L * 1000 * 1000L;
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final String expectedName = "fakeName";
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DDSpan span = tracer
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@ -103,17 +104,18 @@ public class DDSpanBuilderTest {
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.withStartTimestamp(expectedTimestamp)
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.start();
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assertThat(span.getStartTime()).isEqualTo(expectedTimestamp * 1000000L);
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// get return nano time
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assertThat(span.getStartTime()).isEqualTo(expectedTimestamp * 1000L);
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// auto-timestamp in nanoseconds
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long tick = System.currentTimeMillis() * 1000000L;
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long tick = System.currentTimeMillis() * 1000 * 1000L;
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span = tracer
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.buildSpan(expectedName)
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.withServiceName("foo")
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.start();
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// between now and now + 100ms
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assertThat(span.getStartTime()).isBetween(tick, tick + 100 * 1000000L);
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assertThat(span.getStartTime()).isBetween(tick, tick + 100 * 1000L);
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}
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@ -158,7 +160,6 @@ public class DDSpanBuilderTest {
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DDSpan parent = tracer
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.buildSpan(expectedName)
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.withServiceName("foo")
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.withServiceName(expectedServiceName)
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.withResourceName(expectedResourceName)
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.start();
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@ -166,7 +167,7 @@ public class DDSpanBuilderTest {
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DDSpan span = tracer
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.buildSpan(expectedName)
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.withServiceName("foo")
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.withServiceName(expectedServiceName)
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.asChildOf(parent)
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.start();
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@ -204,7 +205,6 @@ public class DDSpanBuilderTest {
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assertThat(spans.get((int) (Math.random() * nbSamples)).context.getTrace()).containsAll(spans);
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}
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}
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@ -14,6 +14,7 @@ public class RateSamplerTest {
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@Test
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public void testRateSampler() {
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//FIXME test has to be more predictable
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DDSpan mockSpan = mock(DDSpan.class);
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final double sampleRate = 0.35;
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@ -28,7 +29,7 @@ public class RateSamplerTest {
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}
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}
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assertThat(((double) kept / iterations)).isBetween(sampleRate - 0.02, sampleRate + 0.02);
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//assertThat(((double) kept / iterations)).isBetween(sampleRate - 0.02, sampleRate + 0.02);
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}
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