api-trace

API trace example

The example demonstrates how to use GoVPP API trace functionality. Connection object core.Connection contains API tracer able to record API messages sent to and from VPP.

Access to the tracer is done via Trace(). It allows accessing several methods to manage collected entries:

• Enable(<bool>) either enables or disables the trace. Note that the trace is disabled by default and messages are not recorded while so.
• GetRecords() []*api.Record provide messages collected since the plugin was enabled or cleared.
• GetRecordsForChannel(<channelID>) []*api.Record provide messages collected on the given channel since the plugin was enabled or cleared.
• Clear() removes recorded messages.

A record is represented by Record type. It contains information about the message, its direction, time and channel ID. Following fields are available:

• Message api.Message returns recorded entry as GoVPP Message.
• Timestamp time.Time is the message timestamp.
• IsReceived bool is true if the message is a reply or details message, false otherwise.
• ChannelID uint16 is the ID of channel processing the traced message.