| /* |
| * Copyright 2018, 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.implcore.trace.export; |
| |
| import io.opencensus.implcore.trace.RecordEventsSpanImpl; |
| import io.opencensus.trace.export.SampledSpanStore; |
| import io.opencensus.trace.export.SpanData; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Set; |
| |
| /** Abstract implementation of the {@link SampledSpanStore}. */ |
| public abstract class SampledSpanStoreImpl extends SampledSpanStore { |
| private static final SampledSpanStoreImpl NOOP_SAMPLED_SPAN_STORE_IMPL = |
| new NoopSampledSpanStoreImpl(); |
| |
| /** Returns the new no-op implmentation of {@link SampledSpanStoreImpl}. */ |
| public static SampledSpanStoreImpl getNoopSampledSpanStoreImpl() { |
| return NOOP_SAMPLED_SPAN_STORE_IMPL; |
| } |
| |
| /** |
| * Considers to save the given spans to the stored samples. This must be called at the end of each |
| * Span with the option RECORD_EVENTS. |
| * |
| * @param span the span to be consider for storing into the store buckets. |
| */ |
| public abstract void considerForSampling(RecordEventsSpanImpl span); |
| |
| protected void shutdown() {} |
| |
| private static final class NoopSampledSpanStoreImpl extends SampledSpanStoreImpl { |
| private static final Summary EMPTY_SUMMARY = |
| Summary.create(Collections.<String, PerSpanNameSummary>emptyMap()); |
| private static final Set<String> EMPTY_REGISTERED_SPAN_NAMES = Collections.<String>emptySet(); |
| private static final Collection<SpanData> EMPTY_SPANDATA = Collections.<SpanData>emptySet(); |
| |
| @Override |
| public Summary getSummary() { |
| return EMPTY_SUMMARY; |
| } |
| |
| @Override |
| public void considerForSampling(RecordEventsSpanImpl span) {} |
| |
| @Override |
| public void registerSpanNamesForCollection(Collection<String> spanNames) {} |
| |
| @Override |
| public void unregisterSpanNamesForCollection(Collection<String> spanNames) {} |
| |
| @Override |
| public Set<String> getRegisteredSpanNamesForCollection() { |
| return EMPTY_REGISTERED_SPAN_NAMES; |
| } |
| |
| @Override |
| public Collection<SpanData> getErrorSampledSpans(ErrorFilter filter) { |
| return EMPTY_SPANDATA; |
| } |
| |
| @Override |
| public Collection<SpanData> getLatencySampledSpans(LatencyFilter filter) { |
| return EMPTY_SPANDATA; |
| } |
| } |
| } |