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[cdc_stream] Automatically start service (#28)

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Starts the streaming service if it's not up and running. This required
adding the ability to run a detached process. By default, all child
processes are killed when the parent process exits. Since detached
child processes don't run with a console, they need to create sub-
processes with CREATE_NO_WINDOW since otherwise a new console pops up,
e.g. for every ssh command.

Polls for 20 seconds while the service starts up. For this purpose,
a BackgroundServiceClient is added. This will be reused in a future CL
by a new stop-service command to exit the service.

Also adds --service-port as additional argument to start-service.
This commit is contained in:
Lutz Justen
2022-12-02 14:34:36 +01:00
committed by GitHub
parent 6d63aa72d7
commit 1120dcbee0
21 changed files with 372 additions and 76 deletions
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10
cdc_stream/asset_stream_config.cc
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@@ -20,6 +20,7 @@
#include "absl/strings/str_join.h"
#include "absl_helper/jedec_size_flag.h"
#include "cdc_stream/base_command.h"
#include "cdc_stream/session_management_server.h"
#include "common/buffer.h"
#include "common/path.h"
#include "common/status_macros.h"
@@ -41,6 +42,13 @@ AssetStreamConfig::~AssetStreamConfig() = default;
void AssetStreamConfig::RegisterCommandLineFlags(lyra::command& cmd,
BaseCommand& base_command) {
service_port_ = SessionManagementServer::kDefaultServicePort;
cmd.add_argument(lyra::opt(service_port_, "port")
.name("--service-port")
.help("Local port to use while connecting to the local "
"asset stream service, default: " +
std::to_string(service_port_)));
session_cfg_.verbosity = kDefaultVerbosity;
cmd.add_argument(lyra::opt(session_cfg_.verbosity, "num")
.name("--verbosity")
@@ -174,6 +182,7 @@ absl::Status AssetStreamConfig::LoadFromFile(const std::string& path) {
} \
} while (0)
ASSIGN_VAR(service_port_, "service-port", Int);
ASSIGN_VAR(session_cfg_.verbosity, "verbosity", Int);
ASSIGN_VAR(session_cfg_.fuse_debug, "debug", Bool);
ASSIGN_VAR(session_cfg_.fuse_singlethreaded, "singlethreaded", Bool);
@@ -212,6 +221,7 @@ absl::Status AssetStreamConfig::LoadFromFile(const std::string& path) {
std::string AssetStreamConfig::ToString() {
std::ostringstream ss;
ss << "service-port = " << service_port_ << std::endl;
ss << "verbosity = " << session_cfg_.verbosity
<< std::endl;
ss << "debug = " << session_cfg_.fuse_debug