github.com/newrelic/go-agent

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• Added support for Cross Application Tracing (CAT). Please refer to the CAT section of the guide for more detail on how to ensure you get the most out of the Go agent's new CAT support.

• The agent now collects additional metadata when running within Amazon Web Services, Google Cloud Platform, Microsoft Azure, and Pivotal Cloud Foundry. This information is used to provide an enhanced experience when the agent is deployed on those platforms.

• Added new RecordCustomMetric method to Application. This functionality can be used to track averages or counters without using custom events.

  • Custom Metric Documentation

• Fixed import needed for logrus. The import Sirupsen/logrus had been renamed to sirupsen/logrus. Thanks to @alfred-landrum for spotting this.

• Added ErrorAttributer, an optional interface that can be implemented by errors provided to Transaction.NoticeError to attach additional attributes. These attributes are subject to attribute configuration.

• Added Error, a type that allows direct control of error fields. Example use:

txn.NoticeError(newrelic.Error{
	// Message is returned by the Error() method.
	Message: "error message: something went very wrong",
	Class:   "errors are aggregated by class",
	Attributes: map[string]interface{}{
		"important_number": 97232,
		"relevant_string":  "zap",
	},
})

• Updated license to address scope of usage.

• Added support for github.com/gin-gonic/gin in the new nrgin package.
  • Documentation
  • Example

• Fixed incorrect metric rule application when the metric rule is flagged to terminate and matches but the name is unchanged.

• Segment.End(), DatastoreSegment.End(), and ExternalSegment.End() methods now return an error which may be helpful in diagnosing situations where segment data is unexpectedly missing.

• Added support for gorilla/mux in the new nrgorilla package.
  • Documentation
  • Example

• Added support for custom error messages and stack traces. Errors provided to Transaction.NoticeError will now be checked to see if they implement ErrorClasser and/or StackTracer. Thanks to @fgrosse for this proposal.

• Added support for pkg/errors. Thanks to @fgrosse for this work.

  • documentation
  • example

• Fixed tests for Go 1.8.

• Added support for Windows. Thanks to @ianomad and @lvxv for the contributions.

• The number of heap objects allocated is recorded in the Memory/Heap/AllocatedObjects metric. This will soon be displayed on the "Go runtime" page.

• If the DatastoreSegment fields Host and PortPathOrID are not provided, they will no longer appear as "unknown" in transaction traces and slow query traces.

• Stack traces will now be nicely aligned in the APM UI.

• Added support for slow query traces. Slow datastore segments will now generate slow query traces viewable on the datastore tab. These traces include a stack trace and help you to debug slow datastore activity. Slow Query Documentation

• Added new DatastoreSegment fields ParameterizedQuery, QueryParameters, Host, PortPathOrID, and DatabaseName. These fields will be shown in transaction traces and in slow query traces.

• Breaking Change: Added a timeout parameter to the Application.Shutdown method.