1 files changed, 81 insertions, 0 deletions
diff --git a/impl_core/src/main/java/io/opencensus/implcore/trace/export/InProcessRunningSpanStoreImpl.java b/impl_core/src/main/java/io/opencensus/implcore/trace/export/InProcessRunningSpanStoreImpl.java
new file mode 100644
index 00000000..f7aeac71
--- /dev/null
+++ b/impl_core/src/main/java/io/opencensus/implcore/trace/export/InProcessRunningSpanStoreImpl.java
@@ -0,0 +1,81 @@
+/*
+ * 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.implcore.trace.internal.ConcurrentIntrusiveList;
+import io.opencensus.trace.export.RunningSpanStore;
+import io.opencensus.trace.export.SpanData;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import javax.annotation.concurrent.ThreadSafe;
+
+/** In-process implementation of the {@link RunningSpanStore}. */
+@ThreadSafe
+public final class InProcessRunningSpanStoreImpl extends RunningSpanStoreImpl {
+  private final ConcurrentIntrusiveList<RecordEventsSpanImpl> runningSpans;
+
+  public InProcessRunningSpanStoreImpl() {
+    runningSpans = new ConcurrentIntrusiveList<RecordEventsSpanImpl>();
+  }
+
+  @Override
+  public void onStart(RecordEventsSpanImpl span) {
+    runningSpans.addElement(span);
+  }
+
+  @Override
+  public void onEnd(RecordEventsSpanImpl span) {
+    runningSpans.removeElement(span);
+  }
+
+  @Override
+  public Summary getSummary() {
+    Collection<RecordEventsSpanImpl> allRunningSpans = runningSpans.getAll();
+    Map<String, Integer> numSpansPerName = new HashMap<String, Integer>();
+    for (RecordEventsSpanImpl span : allRunningSpans) {
+      Integer prevValue = numSpansPerName.get(span.getName());
+      numSpansPerName.put(span.getName(), prevValue != null ? prevValue + 1 : 1);
+    }
+    Map<String, PerSpanNameSummary> perSpanNameSummary = new HashMap<String, PerSpanNameSummary>();
+    for (Map.Entry<String, Integer> it : numSpansPerName.entrySet()) {
+      perSpanNameSummary.put(it.getKey(), PerSpanNameSummary.create(it.getValue()));
+    }
+    Summary summary = Summary.create(perSpanNameSummary);
+    return summary;
+  }
+
+  @Override
+  public Collection<SpanData> getRunningSpans(Filter filter) {
+    Collection<RecordEventsSpanImpl> allRunningSpans = runningSpans.getAll();
+    int maxSpansToReturn =
+        filter.getMaxSpansToReturn() == 0 ? allRunningSpans.size() : filter.getMaxSpansToReturn();
+    List<SpanData> ret = new ArrayList<SpanData>(maxSpansToReturn);
+    for (RecordEventsSpanImpl span : allRunningSpans) {
+      if (ret.size() == maxSpansToReturn) {
+        break;
+      }
+      if (span.getName().equals(filter.getSpanName())) {
+        ret.add(span.toSpanData());
+      }
+    }
+    return ret;
+  }
+}