Ddtrace

This release introduces a new contextvars-based context manager in Python 3.7 and adds support for Tornado 5 and 6 with Python 3.7. In addition, the release includes several updates for our Django integration.

Changes

Core

[internal] Add generic rate limiter (1029)
[internal] Add support for contextvars to tracer in py37 (990)
[internal] Vendor monotonic package (1026)
[dev] Update span test utils (1028)
[dev] Allow extra args to scripts/run-tox-scenario (1027)
[dev] Remove unused circle env vars for release (1016)

Integrations

[tornado] minor documentation fix (1038)
[tornado] document overriding on_finish and log_exception (1037)
[tornado] Add support for Tornado 5 and 6 with Python 3.7 (1034)
[pymongo] Add support for PyMongo 3.9 (1023)
[django] enable distributed tracing by default (1031)
[django] Create test for empty middleware (1022 -- thanks ryanwilsonperkin)
[django] Patch DBs in django app config (1019 -- thanks JBKahn)
[django] Setup pytest-django (995)

Read the [full changeset](https://github.com/DataDog/dd-trace-py/compare/v0.28.0...v0.29.0) and the [release milestone](https://github.com/DataDog/dd-trace-py/milestone/45?closed=1).
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This release introduces container tagging and adds support for gRPC server.

Changes

Integrations

* [grpc] Add support for GRPC server (960)
* [django] Only set sample rate if rate is set (1009)
* [django] Update how we get the http.url (1010)
* [django] Improve Django docs (1002 -- thanks adamchainz)
* [pylibmc] Fix client when tracer is disabled (1004)

Core

* [core] Parse and send container id with payloads to the agent (1007)
* [internal] Change log from exception to debug (1013)
* documentation bugfix (1017)
* Add back release:wheel (1015)
* [tests] Adding in helpful default packages (1008)
* [dev] Map .git into ddtest for setuptools_scm (1006)
* Use setuptools_scm to handle version numbers (999)
* Use Python 3 for test_build job (994)
* writer: fix deprecated log.warn use (993 -- thanks deterralba)
* Upload wheels on release (989)

Read the [full changeset](https://github.com/DataDog/dd-trace-py/compare/v0.27.1...v0.28.0) and the [release milestone](https://github.com/DataDog/dd-trace-py/milestone/44?closed=1).
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This patch release includes performance fix which is highly recommended for anyone currently using 0.27.0.

Changes

* 0.27 Performance Fix 1000

Read the [full changeset](https://github.com/DataDog/dd-trace-py/compare/v0.27.0...v0.27.1)
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This release introduces improvements to the trace writer. In addition, the release fixes some issues with integrations.

Changes

Core

* api: implement __str__ (980)
* API: add Unix Domain Socket connection support (975)
* [core] Remove references to runtime-id (971)
* sampler: rewrite RateByServiceSampler without using Lock (959)
* Handle HTTP timeout in API writer (955)
* payload: raise PayloadFull on full payload (941)

Integrations

* [pymongo] Support newer msg requests (985)
* pymongo: Add missing 2013 opcode (961)
* Refs 983 - Make AIOTracedCursor an async generator (984 -- thanks ewjoachim)
* Fix a typo in AIOTracedCursor docstring (982 -- thanks ewjoachim)
* [sqlalchemy] Only set sample rate if configured (978)

Documentation

* LICENSE: Fix copyright holder notice (977 -- thanks underyx)

Read the [full changeset](https://github.com/DataDog/dd-trace-py/compare/v0.26.0...v0.27.0) and the [release milestone](https://github.com/DataDog/dd-trace-py/milestone/43?closed=1).
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This release introduces several core improvements and continues addressing pain points in our tooling and testing.

Changes

Core

* Add a PeriodicWorker base class for periodic tasks (934)
* Fix runtime workers not flushing to Dogstatsd (939)
* api: simplify _put codepath (956)
* make psutil requirement more accurate (949 -- thanks chrono)
* writer: log a message when a trace is dropped (942)
* span: use system random source to generate span id (940)
* [core] Add config to set hostname tag on trace root span (938)

Integrations

* Support keyword 'target' parameter when wrapping GRPC channels (946 -- thanks asnr)
* Record HTTP status code correctly when using abort() with Bottle (943 -- thanks equake)
* boto: add support for Python 3.5+ (930)

Documentation

* fix documentation for current_root_span (950 -- thanks chrono)

Tooling

* Run flake8 with Python 3 (957)
* tox: fix ignore path for integrations (954)
* Remove mention of -dev branch in CircleCI (931)

Testing

* [tests] Add benchmarks (952)
* [tests] increase deviation for sampler by service test (948)
* [tests] Fix thread synchronization (947)
* [tests] fix brittle deviation test for tracer (945)
* [tests] fix threading synchronization to opentracer test (944
* [pyramid] Fix dotted name for autopatched config test (932)
* tests: always skip sdist, use develop mode (928)

Read the [full changeset](https://github.com/DataDog/dd-trace-py/compare/v0.25.0...v0.26.0) and the [release milestone](https://github.com/DataDog/dd-trace-py/milestone/42?closed=1).
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This release includes several core improvements and addresses pain points in our testing/CI. The release also adds a new integration for Algolia Search.

Changes

Improvements

- Type cast port number to avoid surprise unicode type (892 -- thanks tancnle)
- Add support for Python 3.7 (864)
- [writer] Enhance Q implementation with a wait based one (862)
- [core] Add Span 'manual.keep' and 'manual.drop' tag support (849)
- [core] Vendor msgpack dependency (848)
- Fix http.url tag inconsistency (899)
- aiohttp: do not set query string in http.url tag (923)
- tornado: do not include query string in the http.url tag (922)
- bottle: fix query string embedded in URL (921)
- django: remove query string from http.url tag (920)

Integrations

- Implement algolia search (894)

Tooling

- [dev/tooling] Enforce single quote strings (884)
- [tests] Leverage tox environment listing to simplify CircleCI tox target list (882)

Testing

- tests/tornado: enhance `test_concurrent_requests` (915)
- doc: disable fixed sidebar (906)
- [opentracer] Refactor time usage (902)
- [opentracer] Fix flaky test based on sleep (901)
- [internal] Add and use RuntimeWorker.join() to remove race condition in testing (887)
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