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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 "test/cpp/util/cli_call.h"
#include <grpc/grpc.h>
#include <grpc/slice.h>
#include <grpc/support/log.h>
#include <grpcpp/channel.h>
#include <grpcpp/client_context.h>
#include <grpcpp/support/byte_buffer.h>
#include <cmath>
#include <iostream>
#include <utility>
namespace grpc {
namespace testing {
namespace {
void* tag(int i) { return (void*)static_cast<intptr_t>(i); }
} // namespace
Status CliCall::Call(const std::shared_ptr<grpc::Channel>& channel,
const TString& method, const TString& request,
TString* response,
const OutgoingMetadataContainer& metadata,
IncomingMetadataContainer* server_initial_metadata,
IncomingMetadataContainer* server_trailing_metadata) {
CliCall call(channel, method, metadata);
call.Write(request);
call.WritesDone();
if (!call.Read(response, server_initial_metadata)) {
fprintf(stderr, "Failed to read response.\n");
}
return call.Finish(server_trailing_metadata);
}
CliCall::CliCall(const std::shared_ptr<grpc::Channel>& channel,
const TString& method,
const OutgoingMetadataContainer& metadata, CliArgs args)
: stub_(new grpc::GenericStub(channel)) {
gpr_mu_init(&write_mu_);
gpr_cv_init(&write_cv_);
if (!metadata.empty()) {
for (OutgoingMetadataContainer::const_iterator iter = metadata.begin();
iter != metadata.end(); ++iter) {
ctx_.AddMetadata(iter->first, iter->second);
}
}
// Set deadline if timeout > 0 (default value -1 if no timeout specified)
if (args.timeout > 0) {
int64_t timeout_in_ns = ceil(args.timeout * 1e9);
// Convert timeout (in nanoseconds) to a deadline
auto deadline =
gpr_time_add(gpr_now(GPR_CLOCK_MONOTONIC),
gpr_time_from_nanos(timeout_in_ns, GPR_TIMESPAN));
ctx_.set_deadline(deadline);
} else if (args.timeout != -1) {
fprintf(
stderr,
"WARNING: Non-positive timeout value, skipping setting deadline.\n");
}
call_ = stub_->PrepareCall(&ctx_, method, &cq_);
call_->StartCall(tag(1));
void* got_tag;
bool ok;
cq_.Next(&got_tag, &ok);
GPR_ASSERT(ok);
}
CliCall::~CliCall() {
gpr_cv_destroy(&write_cv_);
gpr_mu_destroy(&write_mu_);
}
void CliCall::Write(const TString& request) {
void* got_tag;
bool ok;
gpr_slice s = gpr_slice_from_copied_buffer(request.data(), request.size());
grpc::Slice req_slice(s, grpc::Slice::STEAL_REF);
grpc::ByteBuffer send_buffer(&req_slice, 1);
call_->Write(send_buffer, tag(2));
cq_.Next(&got_tag, &ok);
GPR_ASSERT(ok);
}
bool CliCall::Read(TString* response,
IncomingMetadataContainer* server_initial_metadata) {
void* got_tag;
bool ok;
grpc::ByteBuffer recv_buffer;
call_->Read(&recv_buffer, tag(3));
if (!cq_.Next(&got_tag, &ok) || !ok) {
return false;
}
std::vector<grpc::Slice> slices;
GPR_ASSERT(recv_buffer.Dump(&slices).ok());
response->clear();
for (size_t i = 0; i < slices.size(); i++) {
response->append(reinterpret_cast<const char*>(slices[i].begin()),
slices[i].size());
}
if (server_initial_metadata) {
*server_initial_metadata = ctx_.GetServerInitialMetadata();
}
return true;
}
void CliCall::WritesDone() {
void* got_tag;
bool ok;
call_->WritesDone(tag(4));
cq_.Next(&got_tag, &ok);
GPR_ASSERT(ok);
}
void CliCall::WriteAndWait(const TString& request) {
grpc::Slice req_slice(request);
grpc::ByteBuffer send_buffer(&req_slice, 1);
gpr_mu_lock(&write_mu_);
call_->Write(send_buffer, tag(2));
write_done_ = false;
while (!write_done_) {
gpr_cv_wait(&write_cv_, &write_mu_, gpr_inf_future(GPR_CLOCK_MONOTONIC));
}
gpr_mu_unlock(&write_mu_);
}
void CliCall::WritesDoneAndWait() {
gpr_mu_lock(&write_mu_);
call_->WritesDone(tag(4));
write_done_ = false;
while (!write_done_) {
gpr_cv_wait(&write_cv_, &write_mu_, gpr_inf_future(GPR_CLOCK_MONOTONIC));
}
gpr_mu_unlock(&write_mu_);
}
bool CliCall::ReadAndMaybeNotifyWrite(
TString* response, IncomingMetadataContainer* server_initial_metadata) {
void* got_tag;
bool ok;
grpc::ByteBuffer recv_buffer;
call_->Read(&recv_buffer, tag(3));
bool cq_result = cq_.Next(&got_tag, &ok);
while (got_tag != tag(3)) {
gpr_mu_lock(&write_mu_);
write_done_ = true;
gpr_cv_signal(&write_cv_);
gpr_mu_unlock(&write_mu_);
cq_result = cq_.Next(&got_tag, &ok);
if (got_tag == tag(2)) {
GPR_ASSERT(ok);
}
}
if (!cq_result || !ok) {
// If the RPC is ended on the server side, we should still wait for the
// pending write on the client side to be done.
if (!ok) {
gpr_mu_lock(&write_mu_);
if (!write_done_) {
cq_.Next(&got_tag, &ok);
GPR_ASSERT(got_tag != tag(2));
write_done_ = true;
gpr_cv_signal(&write_cv_);
}
gpr_mu_unlock(&write_mu_);
}
return false;
}
std::vector<grpc::Slice> slices;
GPR_ASSERT(recv_buffer.Dump(&slices).ok());
response->clear();
for (size_t i = 0; i < slices.size(); i++) {
response->append(reinterpret_cast<const char*>(slices[i].begin()),
slices[i].size());
}
if (server_initial_metadata) {
*server_initial_metadata = ctx_.GetServerInitialMetadata();
}
return true;
}
Status CliCall::Finish(IncomingMetadataContainer* server_trailing_metadata) {
void* got_tag;
bool ok;
grpc::Status status;
call_->Finish(&status, tag(5));
cq_.Next(&got_tag, &ok);
GPR_ASSERT(ok);
if (server_trailing_metadata) {
*server_trailing_metadata = ctx_.GetServerTrailingMetadata();
}
return status;
}
} // namespace testing
} // namespace grpc
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