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// Copyright 2024 Lance Developers.
//
// 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.
use pyo3::{
exceptions::{PyIOError, PyNotImplementedError, PyOSError, PyRuntimeError, PyValueError},
intern,
types::{PyAnyMethods, PyNone},
PyErr, PyResult, Python,
};
use lancedb::error::Error as LanceError;
pub trait PythonErrorExt<T> {
/// Convert to a python error based on the Lance error type
fn infer_error(self) -> PyResult<T>;
/// Convert to OSError
fn os_error(self) -> PyResult<T>;
/// Convert to RuntimeError
fn runtime_error(self) -> PyResult<T>;
/// Convert to ValueError
fn value_error(self) -> PyResult<T>;
}
impl<T> PythonErrorExt<T> for std::result::Result<T, LanceError> {
fn infer_error(self) -> PyResult<T> {
match &self {
Ok(_) => Ok(self.unwrap()),
Err(err) => match err {
LanceError::InvalidInput { .. }
| LanceError::InvalidTableName { .. }
| LanceError::TableNotFound { .. }
| LanceError::Schema { .. }
| LanceError::TableAlreadyExists { .. } => self.value_error(),
LanceError::CreateDir { .. } => self.os_error(),
LanceError::ObjectStore { .. } => Err(PyIOError::new_err(err.to_string())),
LanceError::NotSupported { .. } => {
Err(PyNotImplementedError::new_err(err.to_string()))
}
LanceError::Http {
request_id,
source,
status_code,
} => Python::with_gil(|py| {
let message = err.to_string();
let http_err_cls = py
.import_bound(intern!(py, "lancedb.remote.errors"))?
.getattr(intern!(py, "HttpError"))?;
let err = http_err_cls.call1((
message,
request_id,
status_code.map(|s| s.as_u16()),
))?;
if let Some(cause) = source.source() {
// The HTTP error already includes the first cause. But
// we can add the rest of the chain if there is any more.
let cause_err = http_from_rust_error(
py,
cause,
request_id,
status_code.map(|s| s.as_u16()),
)?;
err.setattr(intern!(py, "__cause__"), cause_err)?;
}
Err(PyErr::from_value_bound(err))
}),
LanceError::Retry {
request_id,
request_failures,
max_request_failures,
connect_failures,
max_connect_failures,
read_failures,
max_read_failures,
source,
status_code,
} => Python::with_gil(|py| {
let cause_err = http_from_rust_error(
py,
source.as_ref(),
request_id,
status_code.map(|s| s.as_u16()),
)?;
let message = err.to_string();
let retry_error_cls = py
.import_bound(intern!(py, "lancedb.remote.errors"))?
.getattr("RetryError")?;
let err = retry_error_cls.call1((
message,
request_id,
*request_failures,
*connect_failures,
*read_failures,
*max_request_failures,
*max_connect_failures,
*max_read_failures,
status_code.map(|s| s.as_u16()),
))?;
err.setattr(intern!(py, "__cause__"), cause_err)?;
Err(PyErr::from_value_bound(err))
}),
_ => self.runtime_error(),
},
}
}
fn os_error(self) -> PyResult<T> {
self.map_err(|err| PyOSError::new_err(err.to_string()))
}
fn runtime_error(self) -> PyResult<T> {
self.map_err(|err| PyRuntimeError::new_err(err.to_string()))
}
fn value_error(self) -> PyResult<T> {
self.map_err(|err| PyValueError::new_err(err.to_string()))
}
}
fn http_from_rust_error(
py: Python<'_>,
err: &dyn std::error::Error,
request_id: &str,
status_code: Option<u16>,
) -> PyResult<PyErr> {
let message = err.to_string();
let http_err_cls = py
.import_bound("lancedb.remote.errors")?
.getattr("HttpError")?;
let py_err = http_err_cls.call1((message, request_id, status_code))?;
// Reset the traceback since it doesn't provide additional information.
let py_err = py_err.call_method1(intern!(py, "with_traceback"), (PyNone::get_bound(py),))?;
if let Some(cause) = err.source() {
let cause_err = http_from_rust_error(py, cause, request_id, status_code)?;
py_err.setattr(intern!(py, "__cause__"), cause_err)?;
}
Ok(PyErr::from_value_bound(py_err))
}