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/*
* Copyright 2017, OpenCensus Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.opencensus.trace.export;
import com.google.auto.value.AutoValue;
import io.opencensus.internal.Utils;
import io.opencensus.trace.EndSpanOptions;
import io.opencensus.trace.Span;
import io.opencensus.trace.Status;
import io.opencensus.trace.Status.CanonicalCode;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import javax.annotation.Nullable;
import javax.annotation.concurrent.GuardedBy;
import javax.annotation.concurrent.Immutable;
import javax.annotation.concurrent.ThreadSafe;
/**
* This class allows users to access in-process information such as latency based sampled spans and
* error based sampled spans.
*
* For all completed spans with the option {@link Span.Options#RECORD_EVENTS} the library can
* store samples based on latency for succeeded operations or based on error code for failed
* operations. To activate this, users MUST manually configure all the span names for which samples
* will be collected (see {@link #registerSpanNamesForCollection(Collection)}).
*
* @since 0.5
*/
@ThreadSafe
public abstract class SampledSpanStore {
protected SampledSpanStore() {}
/**
* Returns a {@code SampledSpanStore} that maintains a set of span names, but always returns an
* empty list of {@link SpanData}.
*
* @return a {@code SampledSpanStore} that maintains a set of span names, but always returns an
* empty list of {@code SpanData}.
*/
static SampledSpanStore newNoopSampledSpanStore() {
return new NoopSampledSpanStore();
}
/**
* Returns the summary of all available data, such as number of sampled spans in the latency based
* samples or error based samples.
*
*
Data available only for span names registered using {@link
* #registerSpanNamesForCollection(Collection)}.
*
* @return the summary of all available data.
* @since 0.5
*/
public abstract Summary getSummary();
/**
* Returns a list of succeeded spans (spans with {@link Status} equal to {@link Status#OK}) that
* match the {@code filter}.
*
*
Latency based sampled spans are available only for span names registered using {@link
* #registerSpanNamesForCollection(Collection)}.
*
* @param filter used to filter the returned sampled spans.
* @return a list of succeeded spans that match the {@code filter}.
* @since 0.5
*/
public abstract Collection getLatencySampledSpans(LatencyFilter filter);
/**
* Returns a list of failed spans (spans with {@link Status} other than {@link Status#OK}) that
* match the {@code filter}.
*
* Error based sampled spans are available only for span names registered using {@link
* #registerSpanNamesForCollection(Collection)}.
*
* @param filter used to filter the returned sampled spans.
* @return a list of failed spans that match the {@code filter}.
* @since 0.5
*/
public abstract Collection getErrorSampledSpans(ErrorFilter filter);
/**
* Appends a list of span names for which the library will collect latency based sampled spans and
* error based sampled spans.
*
* If called multiple times the library keeps the list of unique span names from all the calls.
*
* @param spanNames list of span names for which the library will collect samples.
* @since 0.5
* @deprecated since 0.18. Use {@link EndSpanOptions#getSampleToLocalSpanStore()}.
*/
@Deprecated
public abstract void registerSpanNamesForCollection(Collection spanNames);
/**
* Removes a list of span names for which the library will collect latency based sampled spans and
* error based sampled spans.
*
* The library keeps the list of unique registered span names for which samples will be called.
* This method allows users to remove span names from that list.
*
* @param spanNames list of span names for which the library will no longer collect samples.
* @since 0.5
* @deprecated since 0.18. The need of controlling the registration the span name will be removed
* soon.
*/
@Deprecated
public abstract void unregisterSpanNamesForCollection(Collection spanNames);
/**
* Returns the set of unique span names registered to the library, for use in tests. For this set
* of span names the library will collect latency based sampled spans and error based sampled
* spans.
*
* This method is only meant for testing code that uses OpenCensus, and it is not performant.
*
* @return the set of unique span names registered to the library.
* @since 0.7
*/
public abstract Set getRegisteredSpanNamesForCollection();
/**
* The summary of all available data.
*
* @since 0.5
*/
@AutoValue
@Immutable
public abstract static class Summary {
Summary() {}
/**
* Returns a new instance of {@code Summary}.
*
* @param perSpanNameSummary a map with summary for each span name.
* @return a new instance of {@code Summary}.
* @throws NullPointerException if {@code perSpanNameSummary} is {@code null}.
* @since 0.5
*/
public static Summary create(Map perSpanNameSummary) {
return new AutoValue_SampledSpanStore_Summary(
Collections.unmodifiableMap(
new HashMap(
Utils.checkNotNull(perSpanNameSummary, "perSpanNameSummary"))));
}
/**
* Returns a map with summary of available data for each span name.
*
* @return a map with all the span names and the summary.
* @since 0.5
*/
public abstract Map getPerSpanNameSummary();
}
/**
* Summary of all available data for a span name.
*
* @since 0.5
*/
@AutoValue
@Immutable
public abstract static class PerSpanNameSummary {
PerSpanNameSummary() {}
/**
* Returns a new instance of {@code PerSpanNameSummary}.
*
* @param numbersOfLatencySampledSpans the summary for the latency buckets.
* @param numbersOfErrorSampledSpans the summary for the error buckets.
* @return a new instance of {@code PerSpanNameSummary}.
* @throws NullPointerException if {@code numbersOfLatencySampledSpans} or {@code
* numbersOfErrorSampledSpans} are {@code null}.
* @since 0.5
*/
public static PerSpanNameSummary create(
Map numbersOfLatencySampledSpans,
Map numbersOfErrorSampledSpans) {
return new AutoValue_SampledSpanStore_PerSpanNameSummary(
Collections.unmodifiableMap(
new HashMap(
Utils.checkNotNull(
numbersOfLatencySampledSpans, "numbersOfLatencySampledSpans"))),
Collections.unmodifiableMap(
new HashMap(
Utils.checkNotNull(numbersOfErrorSampledSpans, "numbersOfErrorSampledSpans"))));
}
/**
* Returns the number of sampled spans in all the latency buckets.
*
* Data available only for span names registered using {@link
* #registerSpanNamesForCollection(Collection)}.
*
* @return the number of sampled spans in all the latency buckets.
* @since 0.5
*/
public abstract Map getNumbersOfLatencySampledSpans();
/**
* Returns the number of sampled spans in all the error buckets.
*
* Data available only for span names registered using {@link
* #registerSpanNamesForCollection(Collection)}.
*
* @return the number of sampled spans in all the error buckets.
* @since 0.5
*/
public abstract Map getNumbersOfErrorSampledSpans();
}
/**
* The latency buckets boundaries. Samples based on latency for successful spans (the status of
* the span has a canonical code equal to {@link CanonicalCode#OK}) are collected in one of these
* latency buckets.
*
* @since 0.5
*/
public enum LatencyBucketBoundaries {
/**
* Stores finished successful requests of duration within the interval [0, 10us).
*
* @since 0.5
*/
ZERO_MICROSx10(0, TimeUnit.MICROSECONDS.toNanos(10)),
/**
* Stores finished successful requests of duration within the interval [10us, 100us).
*
* @since 0.5
*/
MICROSx10_MICROSx100(TimeUnit.MICROSECONDS.toNanos(10), TimeUnit.MICROSECONDS.toNanos(100)),
/**
* Stores finished successful requests of duration within the interval [100us, 1ms).
*
* @since 0.5
*/
MICROSx100_MILLIx1(TimeUnit.MICROSECONDS.toNanos(100), TimeUnit.MILLISECONDS.toNanos(1)),
/**
* Stores finished successful requests of duration within the interval [1ms, 10ms).
*
* @since 0.5
*/
MILLIx1_MILLIx10(TimeUnit.MILLISECONDS.toNanos(1), TimeUnit.MILLISECONDS.toNanos(10)),
/**
* Stores finished successful requests of duration within the interval [10ms, 100ms).
*
* @since 0.5
*/
MILLIx10_MILLIx100(TimeUnit.MILLISECONDS.toNanos(10), TimeUnit.MILLISECONDS.toNanos(100)),
/**
* Stores finished successful requests of duration within the interval [100ms, 1sec).
*
* @since 0.5
*/
MILLIx100_SECONDx1(TimeUnit.MILLISECONDS.toNanos(100), TimeUnit.SECONDS.toNanos(1)),
/**
* Stores finished successful requests of duration within the interval [1sec, 10sec).
*
* @since 0.5
*/
SECONDx1_SECONDx10(TimeUnit.SECONDS.toNanos(1), TimeUnit.SECONDS.toNanos(10)),
/**
* Stores finished successful requests of duration within the interval [10sec, 100sec).
*
* @since 0.5
*/
SECONDx10_SECONDx100(TimeUnit.SECONDS.toNanos(10), TimeUnit.SECONDS.toNanos(100)),
/**
* Stores finished successful requests of duration >= 100sec.
*
* @since 0.5
*/
SECONDx100_MAX(TimeUnit.SECONDS.toNanos(100), Long.MAX_VALUE);
/**
* Constructs a {@code LatencyBucketBoundaries} with the given boundaries and label.
*
* @param latencyLowerNs the latency lower bound of the bucket.
* @param latencyUpperNs the latency upper bound of the bucket.
*/
LatencyBucketBoundaries(long latencyLowerNs, long latencyUpperNs) {
this.latencyLowerNs = latencyLowerNs;
this.latencyUpperNs = latencyUpperNs;
}
/**
* Returns the latency lower bound of the bucket.
*
* @return the latency lower bound of the bucket.
* @since 0.5
*/
public long getLatencyLowerNs() {
return latencyLowerNs;
}
/**
* Returns the latency upper bound of the bucket.
*
* @return the latency upper bound of the bucket.
* @since 0.5
*/
public long getLatencyUpperNs() {
return latencyUpperNs;
}
private final long latencyLowerNs;
private final long latencyUpperNs;
}
/**
* Filter for latency based sampled spans. Used to filter results returned by the {@link
* #getLatencySampledSpans(LatencyFilter)} request.
*
* @since 0.5
*/
@AutoValue
@Immutable
public abstract static class LatencyFilter {
LatencyFilter() {}
/**
* Returns a new instance of {@code LatencyFilter}.
*
* Filters all the spans based on {@code spanName} and latency in the interval
* [latencyLowerNs, latencyUpperNs) and returns a maximum of {@code maxSpansToReturn}.
*
* @param spanName the name of the span.
* @param latencyLowerNs the latency lower bound.
* @param latencyUpperNs the latency upper bound.
* @param maxSpansToReturn the maximum number of results to be returned. {@code 0} means all.
* @return a new instance of {@code LatencyFilter}.
* @throws NullPointerException if {@code spanName} is {@code null}.
* @throws IllegalArgumentException if {@code maxSpansToReturn} or {@code latencyLowerNs} or
* {@code latencyUpperNs} are negative.
* @since 0.5
*/
public static LatencyFilter create(
String spanName, long latencyLowerNs, long latencyUpperNs, int maxSpansToReturn) {
Utils.checkArgument(maxSpansToReturn >= 0, "Negative maxSpansToReturn.");
Utils.checkArgument(latencyLowerNs >= 0, "Negative latencyLowerNs");
Utils.checkArgument(latencyUpperNs >= 0, "Negative latencyUpperNs");
return new AutoValue_SampledSpanStore_LatencyFilter(
spanName, latencyLowerNs, latencyUpperNs, maxSpansToReturn);
}
/**
* Returns the span name used by this filter.
*
* @return the span name used by this filter.
* @since 0.5
*/
public abstract String getSpanName();
/**
* Returns the latency lower bound of this bucket (inclusive).
*
* @return the latency lower bound of this bucket.
* @since 0.5
*/
public abstract long getLatencyLowerNs();
/**
* Returns the latency upper bound of this bucket (exclusive).
*
* @return the latency upper bound of this bucket.
* @since 0.5
*/
public abstract long getLatencyUpperNs();
/**
* Returns the maximum number of spans to be returned. {@code 0} means all.
*
* @return the maximum number of spans to be returned.
* @since 0.5
*/
public abstract int getMaxSpansToReturn();
}
/**
* Filter for error based sampled spans. Used to filter results returned by the {@link
* #getErrorSampledSpans(ErrorFilter)} request.
*
* @since 0.5
*/
@AutoValue
@Immutable
public abstract static class ErrorFilter {
ErrorFilter() {}
/**
* Returns a new instance of {@code ErrorFilter}.
*
*
Filters all the spans based on {@code spanName} and {@code canonicalCode} and returns a
* maximum of {@code maxSpansToReturn}.
*
* @param spanName the name of the span.
* @param canonicalCode the error code of the span. {@code null} can be used to query all error
* codes.
* @param maxSpansToReturn the maximum number of results to be returned. {@code 0} means all.
* @return a new instance of {@code ErrorFilter}.
* @throws NullPointerException if {@code spanName} is {@code null}.
* @throws IllegalArgumentException if {@code canonicalCode} is {@link CanonicalCode#OK} or
* {@code maxSpansToReturn} is negative.
* @since 0.5
*/
public static ErrorFilter create(
String spanName, @Nullable CanonicalCode canonicalCode, int maxSpansToReturn) {
if (canonicalCode != null) {
Utils.checkArgument(canonicalCode != CanonicalCode.OK, "Invalid canonical code.");
}
Utils.checkArgument(maxSpansToReturn >= 0, "Negative maxSpansToReturn.");
return new AutoValue_SampledSpanStore_ErrorFilter(spanName, canonicalCode, maxSpansToReturn);
}
/**
* Returns the span name used by this filter.
*
* @return the span name used by this filter.
* @since 0.5
*/
public abstract String getSpanName();
/**
* Returns the canonical code used by this filter. Always different than {@link
* CanonicalCode#OK}. If {@code null} then all errors match.
*
* @return the canonical code used by this filter.
* @since 0.5
*/
@Nullable
public abstract CanonicalCode getCanonicalCode();
/**
* Returns the maximum number of spans to be returned. Used to enforce the number of returned
* {@code SpanData}. {@code 0} means all.
*
* @return the maximum number of spans to be returned.
* @since 0.5
*/
public abstract int getMaxSpansToReturn();
}
@ThreadSafe
private static final class NoopSampledSpanStore extends SampledSpanStore {
private static final PerSpanNameSummary EMPTY_PER_SPAN_NAME_SUMMARY =
PerSpanNameSummary.create(
Collections.emptyMap(),
Collections.emptyMap());
@GuardedBy("registeredSpanNames")
private final Set registeredSpanNames = new HashSet();
@Override
public Summary getSummary() {
Map result = new HashMap();
synchronized (registeredSpanNames) {
for (String registeredSpanName : registeredSpanNames) {
result.put(registeredSpanName, EMPTY_PER_SPAN_NAME_SUMMARY);
}
}
return Summary.create(result);
}
@Override
public Collection getLatencySampledSpans(LatencyFilter filter) {
Utils.checkNotNull(filter, "latencyFilter");
return Collections.emptyList();
}
@Override
public Collection getErrorSampledSpans(ErrorFilter filter) {
Utils.checkNotNull(filter, "errorFilter");
return Collections.emptyList();
}
@Override
public void registerSpanNamesForCollection(Collection spanNames) {
Utils.checkNotNull(spanNames, "spanNames");
synchronized (registeredSpanNames) {
registeredSpanNames.addAll(spanNames);
}
}
@Override
public void unregisterSpanNamesForCollection(Collection spanNames) {
Utils.checkNotNull(spanNames, "spanNames");
synchronized (registeredSpanNames) {
registeredSpanNames.removeAll(spanNames);
}
}
@Override
public Set getRegisteredSpanNamesForCollection() {
synchronized (registeredSpanNames) {
return Collections.unmodifiableSet(new HashSet(registeredSpanNames));
}
}
}
}