Prepare 1.39.0 (#6506)

Co-authored-by: Trask Stalnaker <trask.stalnaker@gmail.com>

CHANGELOG.md

@@ -2,6 +2,48 @@
 
 ## Unreleased
 
+### API
+
+#### Incubator
+
+* BREAKING: Refactor ExtendedTracer, ExtendedSpanBuilder to reflect incubating API conventions
+  ([#6497](https://github.com/open-telemetry/opentelemetry-java/pull/6497))
+
+### SDK
+
+#### Exporter
+
+* BREAKING: Serve prometheus metrics only on `/metrics` by default. To restore the previous behavior
+  and serve metrics on all paths, override the default handler
+  as [demonstrated here](https://github.com/open-telemetry/opentelemetry-java/blob/main/exporters/prometheus/src/test/java/io/opentelemetry/exporter/prometheus/PrometheusHttpServerTest.java#L251-L259).
+  ([#6476](https://github.com/open-telemetry/opentelemetry-java/pull/6476))
+* Make OTLP exporter memory mode API public
+  ([#6469](https://github.com/open-telemetry/opentelemetry-java/pull/6469))
+* Speed up OTLP string marshaling using sun.misc.Unsafe
+  ([#6433](https://github.com/open-telemetry/opentelemetry-java/pull/6433))
+* Add exporter data classes for experimental profiling signal type.
+  ([#6374](https://github.com/open-telemetry/opentelemetry-java/pull/6374))
+* Start prometheus http server with daemon thread
+  ([#6472](https://github.com/open-telemetry/opentelemetry-java/pull/6472))
+* Update the Prometheus metrics library and improve how units are included in metric names.
+  ([#6473](https://github.com/open-telemetry/opentelemetry-java/pull/6473))
+* Remove android animalsniffer check from prometheus exporter
+  ([#6478](https://github.com/open-telemetry/opentelemetry-java/pull/6478))
+
+#### Extensions
+
+* Load file config YAML using core schema, ensure that env var substitution retains string types.
+  ([#6436](https://github.com/open-telemetry/opentelemetry-java/pull/6436))
+* Define dedicated file configuration SPI ComponentProvider
+  ([#6457](https://github.com/open-telemetry/opentelemetry-java/pull/6457))
+
+### Tooling
+
+* Normalize timestamps and file ordering in jars, making the outputs reproducible
+  ([#6471](https://github.com/open-telemetry/opentelemetry-java/pull/6471))
+* GHA for generating the post-release pull request
+  ([#6449](https://github.com/open-telemetry/opentelemetry-java/pull/6449))
+
 ## Version 1.38.0 (2024-05-10)
 
 ### API

exporters/otlp/all/src/main/java/io/opentelemetry/exporter/otlp/http/logs/OtlpHttpLogRecordExporterBuilder.java

@@ -213,8 +213,10 @@ public OtlpHttpLogRecordExporterBuilder setMeterProvider(
   /**
    * Set the {@link MemoryMode}. If unset, defaults to {@link #DEFAULT_MEMORY_MODE}.
    *
-   * <p>>When memory mode is {@link MemoryMode#REUSABLE_DATA}, serialization is optimized to reduce
+   * <p>When memory mode is {@link MemoryMode#REUSABLE_DATA}, serialization is optimized to reduce
    * memory allocation.
+   *
+   * @since 1.39.0
    */
   public OtlpHttpLogRecordExporterBuilder setMemoryMode(MemoryMode memoryMode) {
     requireNonNull(memoryMode, "memoryMode");

exporters/otlp/all/src/main/java/io/opentelemetry/exporter/otlp/http/metrics/OtlpHttpMetricExporterBuilder.java

@@ -236,13 +236,15 @@ public OtlpHttpMetricExporterBuilder setProxyOptions(ProxyOptions proxyOptions)
   /**
    * Set the {@link MemoryMode}. If unset, defaults to {@link #DEFAULT_MEMORY_MODE}.
    *
-   * <p>>When memory mode is {@link MemoryMode#REUSABLE_DATA}, serialization is optimized to reduce
+   * <p>When memory mode is {@link MemoryMode#REUSABLE_DATA}, serialization is optimized to reduce
    * memory allocation. Additionally, the value is used for {@link MetricExporter#getMemoryMode()},
    * which sends a signal to the metrics SDK to reuse memory when possible. This is safe and
    * desirable for most use cases, but should be used with caution of wrapping and delegating to the
    * exporter. It is not safe for the wrapping exporter to hold onto references to {@link
    * MetricData} batches since the same data structures will be reused in subsequent calls to {@link
    * MetricExporter#export(Collection)}.
+   *
+   * @since 1.39.0
    */
   public OtlpHttpMetricExporterBuilder setMemoryMode(MemoryMode memoryMode) {
     requireNonNull(memoryMode, "memoryMode");

exporters/otlp/all/src/main/java/io/opentelemetry/exporter/otlp/http/trace/OtlpHttpSpanExporterBuilder.java

@@ -214,8 +214,10 @@ public OtlpHttpSpanExporterBuilder setMeterProvider(
   /**
    * Set the {@link MemoryMode}. If unset, defaults to {@link #DEFAULT_MEMORY_MODE}.
    *
-   * <p>>When memory mode is {@link MemoryMode#REUSABLE_DATA}, serialization is optimized to reduce
+   * <p>When memory mode is {@link MemoryMode#REUSABLE_DATA}, serialization is optimized to reduce
    * memory allocation.
+   *
+   * @since 1.39.0
    */
   public OtlpHttpSpanExporterBuilder setMemoryMode(MemoryMode memoryMode) {
     requireNonNull(memoryMode, "memoryMode");

exporters/otlp/all/src/main/java/io/opentelemetry/exporter/otlp/logs/OtlpGrpcLogRecordExporterBuilder.java

@@ -246,8 +246,10 @@ public OtlpGrpcLogRecordExporterBuilder setMeterProvider(
   /**
    * Set the {@link MemoryMode}. If unset, defaults to {@link #DEFAULT_MEMORY_MODE}.
    *
-   * <p>>When memory mode is {@link MemoryMode#REUSABLE_DATA}, serialization is optimized to reduce
+   * <p>When memory mode is {@link MemoryMode#REUSABLE_DATA}, serialization is optimized to reduce
    * memory allocation.
+   *
+   * @since 1.39.0
    */
   public OtlpGrpcLogRecordExporterBuilder setMemoryMode(MemoryMode memoryMode) {
     requireNonNull(memoryMode, "memoryMode");

exporters/otlp/all/src/main/java/io/opentelemetry/exporter/otlp/metrics/OtlpGrpcMetricExporterBuilder.java

@@ -269,13 +269,15 @@ public OtlpGrpcMetricExporterBuilder setRetryPolicy(RetryPolicy retryPolicy) {
   /**
    * Set the {@link MemoryMode}. If unset, defaults to {@link #DEFAULT_MEMORY_MODE}.
    *
-   * <p>>When memory mode is {@link MemoryMode#REUSABLE_DATA}, serialization is optimized to reduce
+   * <p>When memory mode is {@link MemoryMode#REUSABLE_DATA}, serialization is optimized to reduce
    * memory allocation. Additionally, the value is used for {@link MetricExporter#getMemoryMode()},
    * which sends a signal to the metrics SDK to reuse memory when possible. This is safe and
    * desirable for most use cases, but should be used with caution of wrapping and delegating to the
    * exporter. It is not safe for the wrapping exporter to hold onto references to {@link
    * MetricData} batches since the same data structures will be reused in subsequent calls to {@link
    * MetricExporter#export(Collection)}.
+   *
+   * @since 1.39.0
    */
   public OtlpGrpcMetricExporterBuilder setMemoryMode(MemoryMode memoryMode) {
     requireNonNull(memoryMode, "memoryMode");

exporters/otlp/all/src/main/java/io/opentelemetry/exporter/otlp/trace/OtlpGrpcSpanExporterBuilder.java

@@ -243,8 +243,10 @@ public OtlpGrpcSpanExporterBuilder setMeterProvider(
   /**
    * Set the {@link MemoryMode}. If unset, defaults to {@link #DEFAULT_MEMORY_MODE}.
    *
-   * <p>>When memory mode is {@link MemoryMode#REUSABLE_DATA}, serialization is optimized to reduce
+   * <p>When memory mode is {@link MemoryMode#REUSABLE_DATA}, serialization is optimized to reduce
    * memory allocation.
+   *
+   * @since 1.39.0
    */
   public OtlpGrpcSpanExporterBuilder setMemoryMode(MemoryMode memoryMode) {
     requireNonNull(memoryMode, "memoryMode");

exporters/otlp/profiles/build.gradle.kts

@@ -1,6 +1,7 @@
 plugins {
   id("otel.java-conventions")
-  id("otel.publish-conventions")
+  // TODO (jack-berg): uncomment when ready to publish
+  // id("otel.publish-conventions")
 
   id("otel.animalsniffer-conventions")
 }