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flight.cc
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flight.cc
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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you 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 <signal.h>
#include <utility>
#include "arrow/flight/serialization_internal.h"
#include "arrow/python/flight.h"
#include "arrow/util/io_util.h"
#include "arrow/util/logging.h"
using arrow::flight::FlightPayload;
namespace arrow {
namespace py {
namespace flight {
const char* kPyServerMiddlewareName = "arrow.py_server_middleware";
PyServerAuthHandler::PyServerAuthHandler(PyObject* handler,
const PyServerAuthHandlerVtable& vtable)
: vtable_(vtable) {
Py_INCREF(handler);
handler_.reset(handler);
}
Status PyServerAuthHandler::Authenticate(arrow::flight::ServerAuthSender* outgoing,
arrow::flight::ServerAuthReader* incoming) {
return SafeCallIntoPython([=] {
const Status status = vtable_.authenticate(handler_.obj(), outgoing, incoming);
RETURN_NOT_OK(CheckPyError());
return status;
});
}
Status PyServerAuthHandler::IsValid(const std::string& token,
std::string* peer_identity) {
return SafeCallIntoPython([=] {
const Status status = vtable_.is_valid(handler_.obj(), token, peer_identity);
RETURN_NOT_OK(CheckPyError());
return status;
});
}
PyClientAuthHandler::PyClientAuthHandler(PyObject* handler,
const PyClientAuthHandlerVtable& vtable)
: vtable_(vtable) {
Py_INCREF(handler);
handler_.reset(handler);
}
Status PyClientAuthHandler::Authenticate(arrow::flight::ClientAuthSender* outgoing,
arrow::flight::ClientAuthReader* incoming) {
return SafeCallIntoPython([=] {
const Status status = vtable_.authenticate(handler_.obj(), outgoing, incoming);
RETURN_NOT_OK(CheckPyError());
return status;
});
}
Status PyClientAuthHandler::GetToken(std::string* token) {
return SafeCallIntoPython([=] {
const Status status = vtable_.get_token(handler_.obj(), token);
RETURN_NOT_OK(CheckPyError());
return status;
});
}
PyFlightServer::PyFlightServer(PyObject* server, const PyFlightServerVtable& vtable)
: vtable_(vtable) {
Py_INCREF(server);
server_.reset(server);
}
Status PyFlightServer::ListFlights(
const arrow::flight::ServerCallContext& context,
const arrow::flight::Criteria* criteria,
std::unique_ptr<arrow::flight::FlightListing>* listings) {
return SafeCallIntoPython([&] {
const Status status =
vtable_.list_flights(server_.obj(), context, criteria, listings);
RETURN_NOT_OK(CheckPyError());
return status;
});
}
Status PyFlightServer::GetFlightInfo(const arrow::flight::ServerCallContext& context,
const arrow::flight::FlightDescriptor& request,
std::unique_ptr<arrow::flight::FlightInfo>* info) {
return SafeCallIntoPython([&] {
const Status status = vtable_.get_flight_info(server_.obj(), context, request, info);
RETURN_NOT_OK(CheckPyError());
return status;
});
}
Status PyFlightServer::GetSchema(const arrow::flight::ServerCallContext& context,
const arrow::flight::FlightDescriptor& request,
std::unique_ptr<arrow::flight::SchemaResult>* result) {
return SafeCallIntoPython([&] {
const Status status = vtable_.get_schema(server_.obj(), context, request, result);
RETURN_NOT_OK(CheckPyError());
return status;
});
}
Status PyFlightServer::DoGet(const arrow::flight::ServerCallContext& context,
const arrow::flight::Ticket& request,
std::unique_ptr<arrow::flight::FlightDataStream>* stream) {
return SafeCallIntoPython([&] {
const Status status = vtable_.do_get(server_.obj(), context, request, stream);
RETURN_NOT_OK(CheckPyError());
return status;
});
}
Status PyFlightServer::DoPut(
const arrow::flight::ServerCallContext& context,
std::unique_ptr<arrow::flight::FlightMessageReader> reader,
std::unique_ptr<arrow::flight::FlightMetadataWriter> writer) {
return SafeCallIntoPython([&] {
const Status status =
vtable_.do_put(server_.obj(), context, std::move(reader), std::move(writer));
RETURN_NOT_OK(CheckPyError());
return status;
});
}
Status PyFlightServer::DoExchange(
const arrow::flight::ServerCallContext& context,
std::unique_ptr<arrow::flight::FlightMessageReader> reader,
std::unique_ptr<arrow::flight::FlightMessageWriter> writer) {
return SafeCallIntoPython([&] {
const Status status =
vtable_.do_exchange(server_.obj(), context, std::move(reader), std::move(writer));
RETURN_NOT_OK(CheckPyError());
return status;
});
}
Status PyFlightServer::DoAction(const arrow::flight::ServerCallContext& context,
const arrow::flight::Action& action,
std::unique_ptr<arrow::flight::ResultStream>* result) {
return SafeCallIntoPython([&] {
const Status status = vtable_.do_action(server_.obj(), context, action, result);
RETURN_NOT_OK(CheckPyError());
return status;
});
}
Status PyFlightServer::ListActions(const arrow::flight::ServerCallContext& context,
std::vector<arrow::flight::ActionType>* actions) {
return SafeCallIntoPython([&] {
const Status status = vtable_.list_actions(server_.obj(), context, actions);
RETURN_NOT_OK(CheckPyError());
return status;
});
}
Status PyFlightServer::ServeWithSignals() {
// Respect the current Python settings, i.e. only interrupt the server if there is
// an active signal handler for SIGINT and SIGTERM.
std::vector<int> signals;
for (const int signum : {SIGINT, SIGTERM}) {
ARROW_ASSIGN_OR_RAISE(auto handler, ::arrow::internal::GetSignalHandler(signum));
auto cb = handler.callback();
if (cb != SIG_DFL && cb != SIG_IGN) {
signals.push_back(signum);
}
}
RETURN_NOT_OK(SetShutdownOnSignals(signals));
// Serve until we got told to shutdown or a signal interrupted us
RETURN_NOT_OK(Serve());
int signum = GotSignal();
if (signum != 0) {
// Issue the signal again with Python's signal handlers restored
PyAcquireGIL lock;
raise(signum);
// XXX Ideally we would loop and serve again if no exception was raised.
// Unfortunately, gRPC will return immediately if Serve() is called again.
ARROW_UNUSED(PyErr_CheckSignals());
}
return Status::OK();
}
PyFlightResultStream::PyFlightResultStream(PyObject* generator,
PyFlightResultStreamCallback callback)
: callback_(callback) {
Py_INCREF(generator);
generator_.reset(generator);
}
arrow::Result<std::unique_ptr<arrow::flight::Result>> PyFlightResultStream::Next() {
return SafeCallIntoPython(
[=]() -> arrow::Result<std::unique_ptr<arrow::flight::Result>> {
std::unique_ptr<arrow::flight::Result> result;
const Status status = callback_(generator_.obj(), &result);
RETURN_NOT_OK(CheckPyError());
RETURN_NOT_OK(status);
return result;
});
}
PyFlightDataStream::PyFlightDataStream(
PyObject* data_source, std::unique_ptr<arrow::flight::FlightDataStream> stream)
: stream_(std::move(stream)) {
Py_INCREF(data_source);
data_source_.reset(data_source);
}
std::shared_ptr<Schema> PyFlightDataStream::schema() { return stream_->schema(); }
arrow::Result<FlightPayload> PyFlightDataStream::GetSchemaPayload() {
return stream_->GetSchemaPayload();
}
arrow::Result<FlightPayload> PyFlightDataStream::Next() { return stream_->Next(); }
PyGeneratorFlightDataStream::PyGeneratorFlightDataStream(
PyObject* generator, std::shared_ptr<arrow::Schema> schema,
PyGeneratorFlightDataStreamCallback callback, const ipc::IpcWriteOptions& options)
: schema_(schema), mapper_(*schema_), options_(options), callback_(callback) {
Py_INCREF(generator);
generator_.reset(generator);
}
std::shared_ptr<Schema> PyGeneratorFlightDataStream::schema() { return schema_; }
arrow::Result<FlightPayload> PyGeneratorFlightDataStream::GetSchemaPayload() {
FlightPayload payload;
RETURN_NOT_OK(ipc::GetSchemaPayload(*schema_, options_, mapper_, &payload.ipc_message));
return payload;
}
arrow::Result<FlightPayload> PyGeneratorFlightDataStream::Next() {
return SafeCallIntoPython([=]() -> arrow::Result<FlightPayload> {
FlightPayload payload;
const Status status = callback_(generator_.obj(), &payload);
RETURN_NOT_OK(CheckPyError());
RETURN_NOT_OK(status);
return payload;
});
}
// Flight Server Middleware
PyServerMiddlewareFactory::PyServerMiddlewareFactory(PyObject* factory,
StartCallCallback start_call)
: start_call_(start_call) {
Py_INCREF(factory);
factory_.reset(factory);
}
Status PyServerMiddlewareFactory::StartCall(
const arrow::flight::CallInfo& info,
const arrow::flight::CallHeaders& incoming_headers,
std::shared_ptr<arrow::flight::ServerMiddleware>* middleware) {
return SafeCallIntoPython([&] {
const Status status = start_call_(factory_.obj(), info, incoming_headers, middleware);
RETURN_NOT_OK(CheckPyError());
return status;
});
}
PyServerMiddleware::PyServerMiddleware(PyObject* middleware, Vtable vtable)
: vtable_(vtable) {
Py_INCREF(middleware);
middleware_.reset(middleware);
}
void PyServerMiddleware::SendingHeaders(arrow::flight::AddCallHeaders* outgoing_headers) {
const Status& status = SafeCallIntoPython([&] {
const Status status = vtable_.sending_headers(middleware_.obj(), outgoing_headers);
RETURN_NOT_OK(CheckPyError());
return status;
});
ARROW_WARN_NOT_OK(status, "Python server middleware failed in SendingHeaders");
}
void PyServerMiddleware::CallCompleted(const Status& call_status) {
const Status& status = SafeCallIntoPython([&] {
const Status status = vtable_.call_completed(middleware_.obj(), call_status);
RETURN_NOT_OK(CheckPyError());
return status;
});
ARROW_WARN_NOT_OK(status, "Python server middleware failed in CallCompleted");
}
std::string PyServerMiddleware::name() const { return kPyServerMiddlewareName; }
PyObject* PyServerMiddleware::py_object() const { return middleware_.obj(); }
// Flight Client Middleware
PyClientMiddlewareFactory::PyClientMiddlewareFactory(PyObject* factory,
StartCallCallback start_call)
: start_call_(start_call) {
Py_INCREF(factory);
factory_.reset(factory);
}
void PyClientMiddlewareFactory::StartCall(
const arrow::flight::CallInfo& info,
std::unique_ptr<arrow::flight::ClientMiddleware>* middleware) {
const Status& status = SafeCallIntoPython([&] {
const Status status = start_call_(factory_.obj(), info, middleware);
RETURN_NOT_OK(CheckPyError());
return status;
});
ARROW_WARN_NOT_OK(status, "Python client middleware failed in StartCall");
}
PyClientMiddleware::PyClientMiddleware(PyObject* middleware, Vtable vtable)
: vtable_(vtable) {
Py_INCREF(middleware);
middleware_.reset(middleware);
}
void PyClientMiddleware::SendingHeaders(arrow::flight::AddCallHeaders* outgoing_headers) {
const Status& status = SafeCallIntoPython([&] {
const Status status = vtable_.sending_headers(middleware_.obj(), outgoing_headers);
RETURN_NOT_OK(CheckPyError());
return status;
});
ARROW_WARN_NOT_OK(status, "Python client middleware failed in StartCall");
}
void PyClientMiddleware::ReceivedHeaders(
const arrow::flight::CallHeaders& incoming_headers) {
const Status& status = SafeCallIntoPython([&] {
const Status status = vtable_.received_headers(middleware_.obj(), incoming_headers);
RETURN_NOT_OK(CheckPyError());
return status;
});
ARROW_WARN_NOT_OK(status, "Python client middleware failed in StartCall");
}
void PyClientMiddleware::CallCompleted(const Status& call_status) {
const Status& status = SafeCallIntoPython([&] {
const Status status = vtable_.call_completed(middleware_.obj(), call_status);
RETURN_NOT_OK(CheckPyError());
return status;
});
ARROW_WARN_NOT_OK(status, "Python client middleware failed in StartCall");
}
Status CreateFlightInfo(const std::shared_ptr<arrow::Schema>& schema,
const arrow::flight::FlightDescriptor& descriptor,
const std::vector<arrow::flight::FlightEndpoint>& endpoints,
int64_t total_records, int64_t total_bytes,
std::unique_ptr<arrow::flight::FlightInfo>* out) {
arrow::flight::FlightInfo::Data flight_data;
RETURN_NOT_OK(arrow::flight::internal::SchemaToString(*schema, &flight_data.schema));
flight_data.descriptor = descriptor;
flight_data.endpoints = endpoints;
flight_data.total_records = total_records;
flight_data.total_bytes = total_bytes;
arrow::flight::FlightInfo value(flight_data);
*out = std::unique_ptr<arrow::flight::FlightInfo>(new arrow::flight::FlightInfo(value));
return Status::OK();
}
Status CreateSchemaResult(const std::shared_ptr<arrow::Schema>& schema,
std::unique_ptr<arrow::flight::SchemaResult>* out) {
std::string schema_in;
RETURN_NOT_OK(arrow::flight::internal::SchemaToString(*schema, &schema_in));
arrow::flight::SchemaResult value(schema_in);
*out = std::unique_ptr<arrow::flight::SchemaResult>(
new arrow::flight::SchemaResult(value));
return Status::OK();
}
} // namespace flight
} // namespace py
} // namespace arrow