ocgrpc

var (
	ClientSentMessagesPerRPC     = stats.Int64("grpc.io/client/sent_messages_per_rpc", "Number of messages sent in the RPC (always 1 for non-streaming RPCs).", stats.UnitDimensionless)
	ClientSentBytesPerRPC        = stats.Int64("grpc.io/client/sent_bytes_per_rpc", "Total bytes sent across all request messages per RPC.", stats.UnitBytes)
	ClientReceivedMessagesPerRPC = stats.Int64("grpc.io/client/received_messages_per_rpc", "Number of response messages received per RPC (always 1 for non-streaming RPCs).", stats.UnitDimensionless)
	ClientReceivedBytesPerRPC    = stats.Int64("grpc.io/client/received_bytes_per_rpc", "Total bytes received across all response messages per RPC.", stats.UnitBytes)
	ClientRoundtripLatency       = stats.Float64("grpc.io/client/roundtrip_latency", "Time between first byte of request sent to last byte of response received, or terminal error.", stats.UnitMilliseconds)
	ClientStartedRPCs            = stats.Int64("grpc.io/client/started_rpcs", "Number of started client RPCs.", stats.UnitDimensionless)
	ClientServerLatency          = stats.Float64("grpc.io/client/server_latency", `Propagated from the server and should have the same value as "grpc.io/server/latency".`, stats.UnitMilliseconds)
)

var (
	ClientSentBytesPerRPCView = &view.View{
		Measure:     ClientSentBytesPerRPC,
		Name:        "grpc.io/client/sent_bytes_per_rpc",
		Description: "Distribution of bytes sent per RPC, by method.",
		TagKeys:     []tag.Key{KeyClientMethod},
		Aggregation: DefaultBytesDistribution,
	}

	ClientReceivedBytesPerRPCView = &view.View{
		Measure:     ClientReceivedBytesPerRPC,
		Name:        "grpc.io/client/received_bytes_per_rpc",
		Description: "Distribution of bytes received per RPC, by method.",
		TagKeys:     []tag.Key{KeyClientMethod},
		Aggregation: DefaultBytesDistribution,
	}

	ClientRoundtripLatencyView = &view.View{
		Measure:     ClientRoundtripLatency,
		Name:        "grpc.io/client/roundtrip_latency",
		Description: "Distribution of round-trip latency, by method.",
		TagKeys:     []tag.Key{KeyClientMethod},
		Aggregation: DefaultMillisecondsDistribution,
	}

	// Purposely reuses the count from `ClientRoundtripLatency`, tagging
	// with method and status to result in ClientCompletedRpcs.
	ClientCompletedRPCsView = &view.View{
		Measure:     ClientRoundtripLatency,
		Name:        "grpc.io/client/completed_rpcs",
		Description: "Count of RPCs by method and status.",
		TagKeys:     []tag.Key{KeyClientMethod, KeyClientStatus},
		Aggregation: view.Count(),
	}

	ClientStartedRPCsView = &view.View{
		Measure:     ClientStartedRPCs,
		Name:        "grpc.io/client/started_rpcs",
		Description: "Number of started client RPCs.",
		TagKeys:     []tag.Key{KeyClientMethod},
		Aggregation: view.Count(),
	}

	ClientSentMessagesPerRPCView = &view.View{
		Measure:     ClientSentMessagesPerRPC,
		Name:        "grpc.io/client/sent_messages_per_rpc",
		Description: "Distribution of sent messages count per RPC, by method.",
		TagKeys:     []tag.Key{KeyClientMethod},
		Aggregation: DefaultMessageCountDistribution,
	}

	ClientReceivedMessagesPerRPCView = &view.View{
		Measure:     ClientReceivedMessagesPerRPC,
		Name:        "grpc.io/client/received_messages_per_rpc",
		Description: "Distribution of received messages count per RPC, by method.",
		TagKeys:     []tag.Key{KeyClientMethod},
		Aggregation: DefaultMessageCountDistribution,
	}

	ClientServerLatencyView = &view.View{
		Measure:     ClientServerLatency,
		Name:        "grpc.io/client/server_latency",
		Description: "Distribution of server latency as viewed by client, by method.",
		TagKeys:     []tag.Key{KeyClientMethod},
		Aggregation: DefaultMillisecondsDistribution,
	}
)

var (
	ServerReceivedMessagesPerRPC = stats.Int64("grpc.io/server/received_messages_per_rpc", "Number of messages received in each RPC. Has value 1 for non-streaming RPCs.", stats.UnitDimensionless)
	ServerReceivedBytesPerRPC    = stats.Int64("grpc.io/server/received_bytes_per_rpc", "Total bytes received across all messages per RPC.", stats.UnitBytes)
	ServerSentMessagesPerRPC     = stats.Int64("grpc.io/server/sent_messages_per_rpc", "Number of messages sent in each RPC. Has value 1 for non-streaming RPCs.", stats.UnitDimensionless)
	ServerSentBytesPerRPC        = stats.Int64("grpc.io/server/sent_bytes_per_rpc", "Total bytes sent in across all response messages per RPC.", stats.UnitBytes)
	ServerStartedRPCs            = stats.Int64("grpc.io/server/started_rpcs", "Number of started server RPCs.", stats.UnitDimensionless)
	ServerLatency                = stats.Float64("grpc.io/server/server_latency", "Time between first byte of request received to last byte of response sent, or terminal error.", stats.UnitMilliseconds)
)

var (
	ServerReceivedBytesPerRPCView = &view.View{
		Name:        "grpc.io/server/received_bytes_per_rpc",
		Description: "Distribution of received bytes per RPC, by method.",
		Measure:     ServerReceivedBytesPerRPC,
		TagKeys:     []tag.Key{KeyServerMethod},
		Aggregation: DefaultBytesDistribution,
	}

	ServerSentBytesPerRPCView = &view.View{
		Name:        "grpc.io/server/sent_bytes_per_rpc",
		Description: "Distribution of total sent bytes per RPC, by method.",
		Measure:     ServerSentBytesPerRPC,
		TagKeys:     []tag.Key{KeyServerMethod},
		Aggregation: DefaultBytesDistribution,
	}

	ServerLatencyView = &view.View{
		Name:        "grpc.io/server/server_latency",
		Description: "Distribution of server latency in milliseconds, by method.",
		TagKeys:     []tag.Key{KeyServerMethod},
		Measure:     ServerLatency,
		Aggregation: DefaultMillisecondsDistribution,
	}

	// Purposely reuses the count from `ServerLatency`, tagging
	// with method and status to result in ServerCompletedRpcs.
	ServerCompletedRPCsView = &view.View{
		Name:        "grpc.io/server/completed_rpcs",
		Description: "Count of RPCs by method and status.",
		TagKeys:     []tag.Key{KeyServerMethod, KeyServerStatus},
		Measure:     ServerLatency,
		Aggregation: view.Count(),
	}

	ServerStartedRPCsView = &view.View{
		Measure:     ServerStartedRPCs,
		Name:        "grpc.io/server/started_rpcs",
		Description: "Number of started server RPCs.",
		TagKeys:     []tag.Key{KeyServerMethod},
		Aggregation: view.Count(),
	}

	ServerReceivedMessagesPerRPCView = &view.View{
		Name:        "grpc.io/server/received_messages_per_rpc",
		Description: "Distribution of messages received count per RPC, by method.",
		TagKeys:     []tag.Key{KeyServerMethod},
		Measure:     ServerReceivedMessagesPerRPC,
		Aggregation: DefaultMessageCountDistribution,
	}

	ServerSentMessagesPerRPCView = &view.View{
		Name:        "grpc.io/server/sent_messages_per_rpc",
		Description: "Distribution of messages sent count per RPC, by method.",
		TagKeys:     []tag.Key{KeyServerMethod},
		Measure:     ServerSentMessagesPerRPC,
		Aggregation: DefaultMessageCountDistribution,
	}
)

var (
	DefaultBytesDistribution        = view.Distribution(1024, 2048, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216, 67108864, 268435456, 1073741824, 4294967296)
	DefaultMillisecondsDistribution = view.Distribution(0.01, 0.05, 0.1, 0.3, 0.6, 0.8, 1, 2, 3, 4, 5, 6, 8, 10, 13, 16, 20, 25, 30, 40, 50, 65, 80, 100, 130, 160, 200, 250, 300, 400, 500, 650, 800, 1000, 2000, 5000, 10000, 20000, 50000, 100000)
	DefaultMessageCountDistribution = view.Distribution(1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536)
)

var (
	KeyServerMethod = tag.MustNewKey("grpc_server_method")
	KeyServerStatus = tag.MustNewKey("grpc_server_status")
)

var (
	KeyClientMethod = tag.MustNewKey("grpc_client_method")
	KeyClientStatus = tag.MustNewKey("grpc_client_status")
)

var DefaultClientViews = []*view.View{
	ClientSentBytesPerRPCView,
	ClientReceivedBytesPerRPCView,
	ClientRoundtripLatencyView,
	ClientCompletedRPCsView,
}

var DefaultServerViews = []*view.View{
	ServerReceivedBytesPerRPCView,
	ServerSentBytesPerRPCView,
	ServerLatencyView,
	ServerCompletedRPCsView,
}