Added integration support for DataDog APM Tracing

vendor/gopkg.in/DataDog/dd-trace-go.v1/ddtrace/ext/app_types.go

@@ -0,0 +1,19 @@
+package ext // import "gopkg.in/DataDog/dd-trace-go.v1/ddtrace/ext"
+
+const (
+	// AppTypeWeb specifies the Web span type and can be used as a tag value
+	// for a span's SpanType tag.
+	AppTypeWeb = "web"
+
+	// AppTypeDB specifies the DB span type and can be used as a tag value
+	// for a span's SpanType tag.
+	AppTypeDB = "db"
+
+	// AppTypeCache specifies the Cache span type and can be used as a tag value
+	// for a span's SpanType tag.
+	AppTypeCache = "cache"
+
+	// AppTypeRPC specifies the RPC span type and can be used as a tag value
+	// for a span's SpanType tag.
+	AppTypeRPC = "rpc"
+)

vendor/gopkg.in/DataDog/dd-trace-go.v1/ddtrace/ext/cassandra.go

@@ -0,0 +1,21 @@
+package ext
+
+const (
+	// CassandraQuery is the tag name used for cassandra queries.
+	CassandraQuery = "cassandra.query"
+
+	// CassandraConsistencyLevel is the tag name to set for consitency level.
+	CassandraConsistencyLevel = "cassandra.consistency_level"
+
+	// CassandraCluster specifies the tag name that is used to set the cluster.
+	CassandraCluster = "cassandra.cluster"
+
+	// CassandraRowCount specifies the tag name to use when settings the row count.
+	CassandraRowCount = "cassandra.row_count"
+
+	// CassandraKeyspace is used as tag name for setting the key space.
+	CassandraKeyspace = "cassandra.keyspace"
+
+	// CassandraPaginated specifies the tag name for paginated queries.
+	CassandraPaginated = "cassandra.paginated"
+)

vendor/gopkg.in/DataDog/dd-trace-go.v1/ddtrace/ext/priority.go

@@ -0,0 +1,22 @@
+package ext
+
+// Priority is a hint given to the backend so that it knows which traces to reject or kept.
+// In a distributed context, it should be set before any context propagation (fork, RPC calls) to be effective.
+
+const (
+	// PriorityUserReject informs the backend that a trace should be rejected and not stored.
+	// This should be used by user code overriding default priority.
+	PriorityUserReject = -1
+
+	// PriorityAutoReject informs the backend that a trace should be rejected and not stored.
+	// This is used by the builtin sampler.
+	PriorityAutoReject = 0
+
+	// PriorityAutoKeep informs the backend that a trace should be kept and not stored.
+	// This is used by the builtin sampler.
+	PriorityAutoKeep = 1
+
+	// PriorityUserKeep informs the backend that a trace should be kept and not stored.
+	// This should be used by user code overriding default priority.
+	PriorityUserKeep = 2
+)

vendor/gopkg.in/DataDog/dd-trace-go.v1/ddtrace/ext/system.go

@@ -0,0 +1,7 @@
+package ext
+
+// Standard system metadata names
+const (
+	// The pid of the traced process
+	Pid = "system.pid"
+)

vendor/gopkg.in/DataDog/dd-trace-go.v1/ddtrace/ext/tags.go

@@ -0,0 +1,50 @@
+// Package ext contains a set of Datadog-specific constants. Most of them are used
+// for setting span metadata.
+package ext
+
+const (
+	// TargetHost sets the target host address.
+	TargetHost = "out.host"
+
+	// TargetPort sets the target host port.
+	TargetPort = "out.port"
+
+	// SamplingPriority is the tag that marks the sampling priority of a span.
+	SamplingPriority = "sampling.priority"
+
+	// SQLType sets the sql type tag.
+	SQLType = "sql"
+
+	// SQLQuery sets the sql query tag on a span.
+	SQLQuery = "sql.query"
+
+	// HTTPMethod specifies the HTTP method used in a span.
+	HTTPMethod = "http.method"
+
+	// HTTPCode sets the HTTP status code as a tag.
+	HTTPCode = "http.status_code"
+
+	// HTTPURL sets the HTTP URL for a span.
+	HTTPURL = "http.url"
+
+	// SpanType defines the Span type (web, db, cache).
+	SpanType = "span.type"
+
+	// ServiceName defines the Service name for this Span.
+	ServiceName = "service.name"
+
+	// ResourceName defines the Resource name for the Span.
+	ResourceName = "resource.name"
+
+	// Error specifies the error tag. It's value is usually of type "error".
+	Error = "error"
+
+	// ErrorMsg specifies the error message.
+	ErrorMsg = "error.msg"
+
+	// ErrorType specifies the error type.
+	ErrorType = "error.type"
+
+	// ErrorStack specifies the stack dump.
+	ErrorStack = "error.stack"
+)