Add changelog entry for 1.16.0 (#4603)

* Add changelog entry for 1.16.0

* Change heading to ## Unreleased

Author: jack-berg

CHANGELOG.md

@@ -1,6 +1,52 @@
 # Changelog
 
-## Version 1.15.0 (Unreleased)
+## Unreleased
+
+### API
+
+* Fix bug `ImmutableKeyValuePairs` implementation that causes `ArrayIndexOutOfBoundsException` to be
+  thrown under certain conditions.
+
+### SDK
+
+#### Traces
+
+* Optimize `BatchSpanProcessor` using JcTools.
+
+#### Metrics
+
+* Tighten up exponential histogram implementation for alignment with specification: Default to 160
+  positive and negative buckets. Remove ability to configure starting scale. Minimum number of
+  buckets is one instead of zero.
+* Allow `MetricExporter` and `MetricReader` to influence default aggregation. The default
+  aggregation is used when no registered views match an instrument.
+
+#### Exporter
+
+* Fix handling of client keys in PEM format.
+* For OTLP exporters, change behavior to use `OkHttpGrpcExporter` (OkHttp implementation that
+  doesn't use any gRPC dependencies) unless `OtlpGrpc{Signal}Builder#setChannel(ManagedChannel)` is
+  called by user. Previously, `OkHttpGrpcExporter` was used if no gRPC implementation was found on
+  classpath.
+* Add support to configure default aggregation on OTLP metric exporters
+  via `Otlp{Protocol}MetricExporterBuilder#setDefaultAggregationSelector(DefaultAggregationSelector)`.
+
+#### Testing
+
+* Add span status assertions.
+
+#### SDK Extensions
+
+* Autoconfigure properly handles non-string system properties.
+* Autoconfigure normalizes hyphens `-` to periods `.` when accessing `ConfigProperties`.
+
+### OpenTracing Shim
+
+* Add support for span wrappers.
+* Store OpenTracing `SpanContext` in OpenTracing `Span` wrapper.
+* Use `Baggage` of active span.
+
+## Version 1.15.0 (2022-06-10)
 
 ### API
 

sdk/testing/src/main/java/io/opentelemetry/sdk/testing/assertj/SpanDataAssert.java

@@ -440,7 +440,11 @@ public SpanDataAssert hasLinksSatisfying(Consumer<List<? extends LinkData>> cond
     return this;
   }
 
-  /** Asserts the span has the given {@link StatusData}. */
+  /**
+   * Asserts the span has the given {@link StatusData}.
+   *
+   * @since 1.16.0
+   */
   public SpanDataAssert hasStatus(StatusData status) {
     isNotNull();
     if (!actual.getStatus().equals(status)) {

sdk/testing/src/main/java/io/opentelemetry/sdk/testing/assertj/StatusDataAssert.java

@@ -13,7 +13,11 @@
 import javax.annotation.Nullable;
 import org.assertj.core.api.AbstractAssert;
 
-/** Assertions for the {@link StatusData} of an exported {@link SpanData}. */
+/**
+ * Assertions for the {@link StatusData} of an exported {@link SpanData}.
+ *
+ * @since 1.16.0
+ */
 public final class StatusDataAssert extends AbstractAssert<StatusDataAssert, StatusData> {
 
   StatusDataAssert(@Nullable StatusData statusData) {