circuitbreaker

What's Changed

• Updated redirected dependency by @jborlum in https://github.com/rubyist/circuitbreaker/pull/60
• go mod stuff by @rubyist in https://github.com/rubyist/circuitbreaker/pull/67

New Contributors

• @jborlum made their first contribution in https://github.com/rubyist/circuitbreaker/pull/60

Full Changelog: https://github.com/rubyist/circuitbreaker/compare/v2.2.1...v2.2.2

2.2.0 - 2016-08-09

Added

• Externally provided event listener channel (@spencerkimball)

Deprecated

• Nothing

Removed

• Nothing

Fixed

• Reduce allocations around last failure time storage
• Use the Clock for window code as well
• Remove test data race
• Fix race condition in state() (@tamird)

Added

• Nothing

Deprecated

• Nothing

Removed

• Nothing

Fixed

• Set Backoff.MaxElapsedTime to 0 as default [@matope]
• Use a lock when modifying nextBackoff
• Fix goroutine leak when using timeouts [@isaldana]
• Fix window buckets that should be empty [@isaldana]
• Update backoff package, which has been renamed

2.1.6 - 2016-02-02

Added

• Nothing

Deprecated

• Nothing

Removed

• Nothing

Fixed

• client.Do() was not returning the error when it timed out [@ryanmurf]

2.1.5 - 2015-11-19

Added

• Nothing

Deprecated

• Nothing

Removed

• Nothing

Fixed

• Respect backoff.Stop [@bc-vincent-zhao]

2.1.4 - 2015-09-01

Added

• Nothing

Deprecated

• Nothing

Removed

• Nothing

Fixed

• HTTP client was using a new panel object instead of the one it added the breaker to [@ryanmurf]

2.1.3 - 2015-08-05

Added

• Configurable bucket time and number [@thraxil]
• Use mock clock for test [@andreas]

Deprecated

• Nothing

Removed

• Nothing

Fixed

• Bug in statsd bucket name documentation / example [@thraxil]

Added

• Nothing

Deprecated

• Nothing

Removed

• Nothing

Fixed

• Simplify Call() for rate breaker, fixing a reset bug [@Melraidin]

Added

• Nothing

Deprecated

• Nothing

Removed

• Nothing

Fixed

• Ensure the half opens counter resets when the breaker resets, or auto-resetting may not occur

Added

• Failure, Sucess counts and Error Rate is now calculated over a sliding window
• Number of buckets in the window and the time the window spans are tuneable

Deprecated

• Nothing

Removed

• Nothing

Fixed

• A race condition in Call()

Added

• ResetCounters

Deprecated

• Nothing

Removed

• Nothing

Fixed

• Nothing

Added

• Nothing

Deprecated

• Nothing

Removed

• Nothing

Fixed

• Error rate should return 0.0 if there have been no samples

This is a major reworking of breaker internals. All circuit breakers are now Breaker objects, and the trip semantics are defined by an assigned ShouldTrip function.

Added

• All circuit breakers are now a Breaker with trip semantics handled by a TripFunc
• NewConsecutiveBreaker
• NewRateBreaker
• ConsecFailures
• ErrorRate
• Success
• Successes
• Retry logic now uses cenkalti/backoff, exponential backoff by default

Deprecated

• Nothing

Removed

• TrippableBreaker, ThresholdBreaker, FrequencyBreaker, TimeoutBreaker; all handled by Breaker now
• NewFrequencyBreaker, replaced by NewConsecutiveBreaker
• NewTimeoutBreaker, time out semantics are now handled by Call()
• NoOp(), use a Breaker with no TripFunc instead

For a FrequencyBreaker, Failures() should return the count since the duration start, even after resetting.

Using Failures() in a monitoring system will always show 0 if traffic is doing Reset() on successful attempts faster than your sampling rate.

Only send the reset event when the breaker was in a tripped state.

This release re-exports the Panel's Circuits map.

This is the 1.0.0 release. The API is considered stable and backward compatibility will be maintained.