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/*
*
* Copyright 2017 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/impl/codegen/port_platform.h>
#include "src/core/lib/channel/channelz.h"
#include <grpc/grpc.h>
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include <grpc/support/string_util.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "src/core/lib/channel/channelz_registry.h"
#include "src/core/lib/channel/status_util.h"
#include "src/core/lib/gpr/string.h"
#include "src/core/lib/gpr/useful.h"
#include "src/core/lib/gprpp/memory.h"
#include "src/core/lib/iomgr/error.h"
#include "src/core/lib/slice/slice_internal.h"
#include "src/core/lib/surface/channel.h"
#include "src/core/lib/transport/error_utils.h"
namespace grpc_core {
namespace channelz {
BaseNode::BaseNode(EntityType type)
: type_(type), uuid_(ChannelzRegistry::Register(this)) {}
BaseNode::~BaseNode() { ChannelzRegistry::Unregister(uuid_); }
char* BaseNode::RenderJsonString() {
grpc_json* json = RenderJson();
char* json_str = grpc_json_dump_to_string(json, 0);
grpc_json_destroy(json);
return json_str;
}
CallCountingHelper::CallCountingHelper() {
gpr_atm_no_barrier_store(&last_call_started_millis_,
(gpr_atm)ExecCtx::Get()->Now());
}
CallCountingHelper::~CallCountingHelper() {}
void CallCountingHelper::RecordCallStarted() {
gpr_atm_no_barrier_fetch_add(&calls_started_, (gpr_atm)1);
gpr_atm_no_barrier_store(&last_call_started_millis_,
(gpr_atm)ExecCtx::Get()->Now());
}
void CallCountingHelper::PopulateCallCounts(grpc_json* json) {
grpc_json* json_iterator = nullptr;
if (calls_started_ != 0) {
json_iterator = grpc_json_add_number_string_child(
json, json_iterator, "callsStarted", calls_started_);
}
if (calls_succeeded_ != 0) {
json_iterator = grpc_json_add_number_string_child(
json, json_iterator, "callsSucceeded", calls_succeeded_);
}
if (calls_failed_) {
json_iterator = grpc_json_add_number_string_child(
json, json_iterator, "callsFailed", calls_failed_);
}
gpr_timespec ts =
grpc_millis_to_timespec(last_call_started_millis_, GPR_CLOCK_REALTIME);
json_iterator =
grpc_json_create_child(json_iterator, json, "lastCallStartedTimestamp",
gpr_format_timespec(ts), GRPC_JSON_STRING, true);
}
ChannelNode::ChannelNode(grpc_channel* channel, size_t channel_tracer_max_nodes,
bool is_top_level_channel)
: BaseNode(is_top_level_channel ? EntityType::kTopLevelChannel
: EntityType::kInternalChannel),
channel_(channel),
target_(UniquePtr<char>(grpc_channel_get_target(channel_))),
trace_(channel_tracer_max_nodes) {}
ChannelNode::~ChannelNode() {}
grpc_json* ChannelNode::RenderJson() {
// We need to track these three json objects to build our object
grpc_json* top_level_json = grpc_json_create(GRPC_JSON_OBJECT);
grpc_json* json = top_level_json;
grpc_json* json_iterator = nullptr;
// create and fill the ref child
json_iterator = grpc_json_create_child(json_iterator, json, "ref", nullptr,
GRPC_JSON_OBJECT, false);
json = json_iterator;
json_iterator = nullptr;
json_iterator = grpc_json_add_number_string_child(json, json_iterator,
"channelId", uuid());
// reset json iterators to top level object
json = top_level_json;
json_iterator = nullptr;
// create and fill the data child.
grpc_json* data = grpc_json_create_child(json_iterator, json, "data", nullptr,
GRPC_JSON_OBJECT, false);
json = data;
json_iterator = nullptr;
// template method. Child classes may override this to add their specific
// functionality.
PopulateConnectivityState(json);
// populate the target.
GPR_ASSERT(target_.get() != nullptr);
grpc_json_create_child(nullptr, json, "target", target_.get(),
GRPC_JSON_STRING, false);
// fill in the channel trace if applicable
grpc_json* trace_json = trace_.RenderJson();
if (trace_json != nullptr) {
trace_json->key = "trace"; // this object is named trace in channelz.proto
grpc_json_link_child(json, trace_json, nullptr);
}
// ask CallCountingHelper to populate trace and call count data.
call_counter_.PopulateCallCounts(json);
json = top_level_json;
// template method. Child classes may override this to add their specific
// functionality.
PopulateChildRefs(json);
return top_level_json;
}
RefCountedPtr<ChannelNode> ChannelNode::MakeChannelNode(
grpc_channel* channel, size_t channel_tracer_max_nodes,
bool is_top_level_channel) {
return MakeRefCounted<grpc_core::channelz::ChannelNode>(
channel, channel_tracer_max_nodes, is_top_level_channel);
}
} // namespace channelz
} // namespace grpc_core
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