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/*
*
* Copyright 2018 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include <grpc/support/port_platform.h>
#include "src/cpp/ext/filters/census/client_filter.h"
#include "absl/strings/str_cat.h"
#include "absl/strings/string_view.h"
#include "opencensus/stats/stats.h"
#include "src/core/lib/surface/call.h"
#include "src/cpp/ext/filters/census/grpc_plugin.h"
#include "src/cpp/ext/filters/census/measures.h"
namespace grpc {
constexpr uint32_t CensusClientCallData::kMaxTraceContextLen;
constexpr uint32_t CensusClientCallData::kMaxTagsLen;
namespace {
void FilterTrailingMetadata(grpc_metadata_batch* b, uint64_t* elapsed_time) {
if (b->idx.named.grpc_server_stats_bin != nullptr) {
ServerStatsDeserialize(
reinterpret_cast<const char*>(GRPC_SLICE_START_PTR(
GRPC_MDVALUE(b->idx.named.grpc_server_stats_bin->md))),
GRPC_SLICE_LENGTH(GRPC_MDVALUE(b->idx.named.grpc_server_stats_bin->md)),
elapsed_time);
grpc_metadata_batch_remove(b, b->idx.named.grpc_server_stats_bin);
}
}
} // namespace
void CensusClientCallData::OnDoneRecvTrailingMetadataCb(void* user_data,
grpc_error* error) {
grpc_call_element* elem = reinterpret_cast<grpc_call_element*>(user_data);
CensusClientCallData* calld =
reinterpret_cast<CensusClientCallData*>(elem->call_data);
GPR_ASSERT(calld != nullptr);
if (error == GRPC_ERROR_NONE) {
GPR_ASSERT(calld->recv_trailing_metadata_ != nullptr);
FilterTrailingMetadata(calld->recv_trailing_metadata_,
&calld->elapsed_time_);
}
GRPC_CLOSURE_RUN(calld->initial_on_done_recv_trailing_metadata_,
GRPC_ERROR_REF(error));
}
void CensusClientCallData::OnDoneRecvMessageCb(void* user_data,
grpc_error* error) {
grpc_call_element* elem = reinterpret_cast<grpc_call_element*>(user_data);
CensusClientCallData* calld =
reinterpret_cast<CensusClientCallData*>(elem->call_data);
CensusChannelData* channeld =
reinterpret_cast<CensusChannelData*>(elem->channel_data);
GPR_ASSERT(calld != nullptr);
GPR_ASSERT(channeld != nullptr);
// Stream messages are no longer valid after receiving trailing metadata.
if ((*calld->recv_message_) != nullptr) {
calld->recv_message_count_++;
}
GRPC_CLOSURE_RUN(calld->initial_on_done_recv_message_, GRPC_ERROR_REF(error));
}
void CensusClientCallData::StartTransportStreamOpBatch(
grpc_call_element* elem, TransportStreamOpBatch* op) {
if (op->send_initial_metadata() != nullptr) {
census_context* ctxt = op->get_census_context();
GenerateClientContext(
qualified_method_, &context_,
(ctxt == nullptr) ? nullptr : reinterpret_cast<CensusContext*>(ctxt));
size_t tracing_len = TraceContextSerialize(context_.Context(), tracing_buf_,
kMaxTraceContextLen);
if (tracing_len > 0) {
GRPC_LOG_IF_ERROR(
"census grpc_filter",
grpc_metadata_batch_add_tail(
op->send_initial_metadata()->batch(), &tracing_bin_,
grpc_mdelem_from_slices(
GRPC_MDSTR_GRPC_TRACE_BIN,
grpc_slice_from_copied_buffer(tracing_buf_, tracing_len))));
}
grpc_slice tags = grpc_empty_slice();
// TODO: Add in tagging serialization.
size_t encoded_tags_len = StatsContextSerialize(kMaxTagsLen, &tags);
if (encoded_tags_len > 0) {
GRPC_LOG_IF_ERROR(
"census grpc_filter",
grpc_metadata_batch_add_tail(
op->send_initial_metadata()->batch(), &stats_bin_,
grpc_mdelem_from_slices(GRPC_MDSTR_GRPC_TAGS_BIN, tags)));
}
}
if (op->send_message() != nullptr) {
++sent_message_count_;
}
if (op->recv_message() != nullptr) {
recv_message_ = op->op()->payload->recv_message.recv_message;
initial_on_done_recv_message_ =
op->op()->payload->recv_message.recv_message_ready;
op->op()->payload->recv_message.recv_message_ready = &on_done_recv_message_;
}
if (op->recv_trailing_metadata() != nullptr) {
recv_trailing_metadata_ = op->recv_trailing_metadata()->batch();
initial_on_done_recv_trailing_metadata_ = op->on_complete();
op->set_on_complete(&on_done_recv_trailing_metadata_);
}
// Call next op.
grpc_call_next_op(elem, op->op());
}
grpc_error* CensusClientCallData::Init(grpc_call_element* elem,
const grpc_call_element_args* args) {
path_ = grpc_slice_ref_internal(args->path);
start_time_ = absl::Now();
method_ = GetMethod(&path_);
qualified_method_ = absl::StrCat("Sent.", method_);
GRPC_CLOSURE_INIT(&on_done_recv_message_, OnDoneRecvMessageCb, elem,
grpc_schedule_on_exec_ctx);
GRPC_CLOSURE_INIT(&on_done_recv_trailing_metadata_,
OnDoneRecvTrailingMetadataCb, elem,
grpc_schedule_on_exec_ctx);
return GRPC_ERROR_NONE;
}
void CensusClientCallData::Destroy(grpc_call_element* elem,
const grpc_call_final_info* final_info,
grpc_closure* then_call_closure) {
const uint64_t request_size = GetOutgoingDataSize(final_info);
const uint64_t response_size = GetIncomingDataSize(final_info);
double latency_ms = absl::ToDoubleMilliseconds(absl::Now() - start_time_);
::opencensus::stats::Record(
{{RpcClientSentBytesPerRpc(), static_cast<double>(request_size)},
{RpcClientReceivedBytesPerRpc(), static_cast<double>(response_size)},
{RpcClientRoundtripLatency(), latency_ms},
{RpcClientServerLatency(),
ToDoubleMilliseconds(absl::Nanoseconds(elapsed_time_))},
{RpcClientSentMessagesPerRpc(), sent_message_count_},
{RpcClientReceivedMessagesPerRpc(), recv_message_count_}},
{{ClientMethodTagKey(), method_},
{ClientStatusTagKey(), StatusCodeToString(final_info->final_status)}});
grpc_slice_unref_internal(path_);
context_.EndSpan();
}
} // namespace grpc
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