Class Span (1.5.1)

Span(mapping=None, *, ignore_unknown_fields=False, **kwargs)

A span represents a single operation within a trace. Spans can be nested to form a trace tree. Often, a trace contains a root span that describes the end-to-end latency, and one or more subspans for its sub-operations. A trace can also contain multiple root spans, or none at all. Spans do not need to be contiguous—there may be gaps or overlaps between spans in a trace.

Attributes

Name	Description
`name`	`str` Required. The resource name of the span in the following format: :: projects/[PROJECT_ID]/traces/[TRACE_ID]/spans/[SPAN_ID] [TRACE_ID] is a unique identifier for a trace within a project; it is a 32-character hexadecimal encoding of a 16-byte array. [SPAN_ID] is a unique identifier for a span within a trace; it is a 16-character hexadecimal encoding of an 8-byte array.
`span_id`	`str` Required. The [SPAN_ID] portion of the span's resource name.
`parent_span_id`	`str` The [SPAN_ID] of this span's parent span. If this is a root span, then this field must be empty.
`display_name`	`google.cloud.trace_v2.types.TruncatableString` Required. A description of the span's operation (up to 128 bytes). Stackdriver Trace displays the description in the Google Cloud Platform Console. For example, the display name can be a qualified method name or a file name and a line number where the operation is called. A best practice is to use the same display name within an application and at the same call point. This makes it easier to correlate spans in different traces.
`start_time`	`google.protobuf.timestamp_pb2.Timestamp` Required. The start time of the span. On the client side, this is the time kept by the local machine where the span execution starts. On the server side, this is the time when the server's application handler starts running.
`end_time`	`google.protobuf.timestamp_pb2.Timestamp` Required. The end time of the span. On the client side, this is the time kept by the local machine where the span execution ends. On the server side, this is the time when the server application handler stops running.
`attributes`	`google.cloud.trace_v2.types.Span.Attributes` A set of attributes on the span. You can have up to 32 attributes per span.
`stack_trace`	`google.cloud.trace_v2.types.StackTrace` Stack trace captured at the start of the span.
`time_events`	`google.cloud.trace_v2.types.Span.TimeEvents` A set of time events. You can have up to 32 annotations and 128 message events per span.
`links`	`google.cloud.trace_v2.types.Span.Links` Links associated with the span. You can have up to 128 links per Span.
`status`	`google.rpc.status_pb2.Status` Optional. The final status for this span.
`same_process_as_parent_span`	`google.protobuf.wrappers_pb2.BoolValue` Optional. Set this parameter to indicate whether this span is in the same process as its parent. If you do not set this parameter, Stackdriver Trace is unable to take advantage of this helpful information.
`child_span_count`	`google.protobuf.wrappers_pb2.Int32Value` Optional. The number of child spans that were generated while this span was active. If set, allows implementation to detect missing child spans.
`span_kind`	`google.cloud.trace_v2.types.Span.SpanKind` Optional. Distinguishes between spans generated in a particular context. For example, two spans with the same name may be distinguished using `CLIENT` (caller) and `SERVER` (callee) to identify an RPC call.

Classes

Attributes

Attributes(mapping=None, *, ignore_unknown_fields=False, **kwargs)

A set of attributes, each in the format [KEY]:[VALUE].

Link

Link(mapping=None, *, ignore_unknown_fields=False, **kwargs)

A pointer from the current span to another span in the same trace or in a different trace. For example, this can be used in batching operations, where a single batch handler processes multiple requests from different traces or when the handler receives a request from a different project.

Links

Links(mapping=None, *, ignore_unknown_fields=False, **kwargs)

A collection of links, which are references from this span to a span in the same or different trace.

SpanKind

SpanKind(value)

Type of span. Can be used to specify additional relationships between spans in addition to a parent/child relationship.

TimeEvent

TimeEvent(mapping=None, *, ignore_unknown_fields=False, **kwargs)

A time-stamped annotation or message event in the Span.

This message has oneof_ fields (mutually exclusive fields). For each oneof, at most one member field can be set at the same time. Setting any member of the oneof automatically clears all other members.

.. _oneof: https://proto-plus-python.readthedocs.io/en/stable/fields.html#oneofs-mutually-exclusive-fields

TimeEvents

TimeEvents(mapping=None, *, ignore_unknown_fields=False, **kwargs)

A collection of TimeEvent\ s. A TimeEvent is a time-stamped annotation on the span, consisting of either user-supplied key:value pairs, or details of a message sent/received between Spans.