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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/core/ext/filters/client_channel/client_channel.h"
#include "src/core/ext/filters/client_channel/client_channel_channelz.h"
#include "src/core/lib/channel/channelz_registry.h"
#include "src/core/lib/gpr/useful.h"
#include "src/core/lib/surface/channel.h"
#include "src/core/lib/transport/connectivity_state.h"
#include <grpc/support/string_util.h>
namespace grpc_core {
namespace channelz {
namespace {
void* client_channel_channelz_copy(void* p) { return p; }
void client_channel_channelz_destroy(void* p) {}
int client_channel_channelz_cmp(void* a, void* b) { return GPR_ICMP(a, b); }
} // namespace
static const grpc_arg_pointer_vtable client_channel_channelz_vtable = {
client_channel_channelz_copy, client_channel_channelz_destroy,
client_channel_channelz_cmp};
ClientChannelNode::ClientChannelNode(grpc_channel* channel,
size_t channel_tracer_max_nodes,
bool is_top_level_channel)
: ChannelNode(channel, channel_tracer_max_nodes, is_top_level_channel) {
client_channel_ =
grpc_channel_stack_last_element(grpc_channel_get_channel_stack(channel));
GPR_ASSERT(client_channel_->filter == &grpc_client_channel_filter);
}
void ClientChannelNode::PopulateConnectivityState(grpc_json* json) {
grpc_connectivity_state state;
if (ChannelIsDestroyed()) {
state = GRPC_CHANNEL_SHUTDOWN;
} else {
state =
grpc_client_channel_check_connectivity_state(client_channel_, false);
}
json = grpc_json_create_child(nullptr, json, "state", nullptr,
GRPC_JSON_OBJECT, false);
grpc_json_create_child(nullptr, json, "state",
grpc_connectivity_state_name(state), GRPC_JSON_STRING,
false);
}
void ClientChannelNode::PopulateChildRefs(grpc_json* json) {
ChildRefsList child_subchannels;
ChildRefsList child_channels;
grpc_json* json_iterator = nullptr;
grpc_client_channel_populate_child_refs(client_channel_, &child_subchannels,
&child_channels);
if (!child_subchannels.empty()) {
grpc_json* array_parent = grpc_json_create_child(
nullptr, json, "subchannelRef", nullptr, GRPC_JSON_ARRAY, false);
for (size_t i = 0; i < child_subchannels.size(); ++i) {
json_iterator =
grpc_json_create_child(json_iterator, array_parent, nullptr, nullptr,
GRPC_JSON_OBJECT, false);
grpc_json_add_number_string_child(json_iterator, nullptr, "subchannelId",
child_subchannels[i]);
}
}
if (!child_channels.empty()) {
grpc_json* array_parent = grpc_json_create_child(
nullptr, json, "channelRef", nullptr, GRPC_JSON_ARRAY, false);
json_iterator = nullptr;
for (size_t i = 0; i < child_channels.size(); ++i) {
json_iterator =
grpc_json_create_child(json_iterator, array_parent, nullptr, nullptr,
GRPC_JSON_OBJECT, false);
grpc_json_add_number_string_child(json_iterator, nullptr, "channelId",
child_channels[i]);
}
}
}
grpc_json* ClientChannelNode::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;
PopulateConnectivityState(json);
// populate the target.
GPR_ASSERT(target_view() != nullptr);
grpc_json_create_child(nullptr, json, "target", target_view(),
GRPC_JSON_STRING, false);
// as CallCountingAndTracingNode to populate trace and call count data.
counter_and_tracer()->PopulateTrace(json);
counter_and_tracer()->PopulateCallData(json);
// reset to the top level
json = top_level_json;
PopulateChildRefs(json);
return top_level_json;
}
grpc_arg ClientChannelNode::CreateChannelArg() {
return grpc_channel_arg_pointer_create(
const_cast<char*>(GRPC_ARG_CHANNELZ_CHANNEL_NODE_CREATION_FUNC),
reinterpret_cast<void*>(MakeClientChannelNode),
&client_channel_channelz_vtable);
}
RefCountedPtr<ChannelNode> ClientChannelNode::MakeClientChannelNode(
grpc_channel* channel, size_t channel_tracer_max_nodes,
bool is_top_level_channel) {
return MakePolymorphicRefCounted<ChannelNode, ClientChannelNode>(
channel, channel_tracer_max_nodes, is_top_level_channel);
}
SubchannelNode::SubchannelNode(grpc_subchannel* subchannel,
size_t channel_tracer_max_nodes)
: BaseNode(EntityType::kSubchannel),
subchannel_(subchannel),
target_(
UniquePtr<char>(gpr_strdup(grpc_subchannel_get_target(subchannel_)))),
counter_and_tracer_(channel_tracer_max_nodes) {}
SubchannelNode::~SubchannelNode() {}
void SubchannelNode::PopulateConnectivityState(grpc_json* json) {
grpc_connectivity_state state;
if (subchannel_ == nullptr) {
state = GRPC_CHANNEL_SHUTDOWN;
} else {
state = grpc_subchannel_check_connectivity(subchannel_, nullptr);
}
json = grpc_json_create_child(nullptr, json, "state", nullptr,
GRPC_JSON_OBJECT, false);
grpc_json_create_child(nullptr, json, "state",
grpc_connectivity_state_name(state), GRPC_JSON_STRING,
false);
}
grpc_json* SubchannelNode::RenderJson() {
grpc_json* top_level_json = grpc_json_create(GRPC_JSON_OBJECT);
grpc_json* json = top_level_json;
grpc_json* json_iterator = nullptr;
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,
"subchannelId", 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;
PopulateConnectivityState(json);
GPR_ASSERT(target_.get() != nullptr);
grpc_json_create_child(nullptr, json, "target", target_.get(),
GRPC_JSON_STRING, false);
counter_and_tracer_.PopulateTrace(json);
counter_and_tracer_.PopulateCallData(json);
return top_level_json;
}
} // namespace channelz
} // namespace grpc_core
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