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/*
*
* Copyright 2015 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/channel_arguments.h>
#include <sstream>
#include <grpc++/grpc++.h>
#include <grpc++/resource_quota.h>
#include <grpc/impl/codegen/grpc_types.h>
#include <grpc/support/log.h>
extern "C" {
#include "src/core/lib/channel/channel_args.h"
#include "src/core/lib/iomgr/exec_ctx.h"
#include "src/core/lib/iomgr/socket_mutator.h"
}
namespace grpc {
ChannelArguments::ChannelArguments() {
// This will be ignored if used on the server side.
SetString(GRPC_ARG_PRIMARY_USER_AGENT_STRING, "grpc-c++/" + Version());
}
ChannelArguments::ChannelArguments(const ChannelArguments& other)
: strings_(other.strings_) {
args_.reserve(other.args_.size());
auto list_it_dst = strings_.begin();
auto list_it_src = other.strings_.begin();
for (auto a = other.args_.begin(); a != other.args_.end(); ++a) {
grpc_arg ap;
ap.type = a->type;
GPR_ASSERT(list_it_src->c_str() == a->key);
ap.key = const_cast<char*>(list_it_dst->c_str());
++list_it_src;
++list_it_dst;
switch (a->type) {
case GRPC_ARG_INTEGER:
ap.value.integer = a->value.integer;
break;
case GRPC_ARG_STRING:
GPR_ASSERT(list_it_src->c_str() == a->value.string);
ap.value.string = const_cast<char*>(list_it_dst->c_str());
++list_it_src;
++list_it_dst;
break;
case GRPC_ARG_POINTER:
ap.value.pointer = a->value.pointer;
ap.value.pointer.p = a->value.pointer.vtable->copy(ap.value.pointer.p);
break;
}
args_.push_back(ap);
}
}
ChannelArguments::~ChannelArguments() {
grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
for (auto it = args_.begin(); it != args_.end(); ++it) {
if (it->type == GRPC_ARG_POINTER) {
it->value.pointer.vtable->destroy(&exec_ctx, it->value.pointer.p);
}
}
grpc_exec_ctx_finish(&exec_ctx);
}
void ChannelArguments::Swap(ChannelArguments& other) {
args_.swap(other.args_);
strings_.swap(other.strings_);
}
void ChannelArguments::SetCompressionAlgorithm(
grpc_compression_algorithm algorithm) {
SetInt(GRPC_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM, algorithm);
}
void ChannelArguments::SetGrpclbFallbackTimeout(int fallback_timeout) {
SetInt(GRPC_ARG_GRPCLB_FALLBACK_TIMEOUT_MS, fallback_timeout);
}
void ChannelArguments::SetSocketMutator(grpc_socket_mutator* mutator) {
if (!mutator) {
return;
}
grpc_arg mutator_arg = grpc_socket_mutator_to_arg(mutator);
bool replaced = false;
grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
for (auto it = args_.begin(); it != args_.end(); ++it) {
if (it->type == mutator_arg.type &&
grpc::string(it->key) == grpc::string(mutator_arg.key)) {
GPR_ASSERT(!replaced);
it->value.pointer.vtable->destroy(&exec_ctx, it->value.pointer.p);
it->value.pointer = mutator_arg.value.pointer;
replaced = true;
}
}
grpc_exec_ctx_finish(&exec_ctx);
if (!replaced) {
args_.push_back(mutator_arg);
}
}
// Note: a second call to this will add in front the result of the first call.
// An example is calling this on a copy of ChannelArguments which already has a
// prefix. The user can build up a prefix string by calling this multiple times,
// each with more significant identifier.
void ChannelArguments::SetUserAgentPrefix(
const grpc::string& user_agent_prefix) {
if (user_agent_prefix.empty()) {
return;
}
bool replaced = false;
auto strings_it = strings_.begin();
for (auto it = args_.begin(); it != args_.end(); ++it) {
const grpc_arg& arg = *it;
++strings_it;
if (arg.type == GRPC_ARG_STRING) {
if (grpc::string(arg.key) == GRPC_ARG_PRIMARY_USER_AGENT_STRING) {
GPR_ASSERT(arg.value.string == strings_it->c_str());
*(strings_it) = user_agent_prefix + " " + arg.value.string;
it->value.string = const_cast<char*>(strings_it->c_str());
replaced = true;
break;
}
++strings_it;
}
}
if (!replaced) {
SetString(GRPC_ARG_PRIMARY_USER_AGENT_STRING, user_agent_prefix);
}
}
void ChannelArguments::SetResourceQuota(
const grpc::ResourceQuota& resource_quota) {
SetPointerWithVtable(GRPC_ARG_RESOURCE_QUOTA,
resource_quota.c_resource_quota(),
grpc_resource_quota_arg_vtable());
}
void ChannelArguments::SetMaxReceiveMessageSize(int size) {
SetInt(GRPC_ARG_MAX_RECEIVE_MESSAGE_LENGTH, size);
}
void ChannelArguments::SetMaxSendMessageSize(int size) {
SetInt(GRPC_ARG_MAX_SEND_MESSAGE_LENGTH, size);
}
void ChannelArguments::SetLoadBalancingPolicyName(
const grpc::string& lb_policy_name) {
SetString(GRPC_ARG_LB_POLICY_NAME, lb_policy_name);
}
void ChannelArguments::SetServiceConfigJSON(
const grpc::string& service_config_json) {
SetString(GRPC_ARG_SERVICE_CONFIG, service_config_json);
}
void ChannelArguments::SetInt(const grpc::string& key, int value) {
grpc_arg arg;
arg.type = GRPC_ARG_INTEGER;
strings_.push_back(key);
arg.key = const_cast<char*>(strings_.back().c_str());
arg.value.integer = value;
args_.push_back(arg);
}
void ChannelArguments::SetPointer(const grpc::string& key, void* value) {
static const grpc_arg_pointer_vtable vtable = {
&PointerVtableMembers::Copy, &PointerVtableMembers::Destroy,
&PointerVtableMembers::Compare};
SetPointerWithVtable(key, value, &vtable);
}
void ChannelArguments::SetPointerWithVtable(
const grpc::string& key, void* value,
const grpc_arg_pointer_vtable* vtable) {
grpc_arg arg;
arg.type = GRPC_ARG_POINTER;
strings_.push_back(key);
arg.key = const_cast<char*>(strings_.back().c_str());
arg.value.pointer.p = vtable->copy(value);
arg.value.pointer.vtable = vtable;
args_.push_back(arg);
}
void ChannelArguments::SetString(const grpc::string& key,
const grpc::string& value) {
grpc_arg arg;
arg.type = GRPC_ARG_STRING;
strings_.push_back(key);
arg.key = const_cast<char*>(strings_.back().c_str());
strings_.push_back(value);
arg.value.string = const_cast<char*>(strings_.back().c_str());
args_.push_back(arg);
}
void ChannelArguments::SetChannelArgs(grpc_channel_args* channel_args) const {
channel_args->num_args = args_.size();
if (channel_args->num_args > 0) {
channel_args->args = const_cast<grpc_arg*>(&args_[0]);
}
}
} // namespace grpc
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