diff --git a/go/.gitignore b/go/.gitignore index 5b5c1537a7..7e45fbb3ff 100644 --- a/go/.gitignore +++ b/go/.gitignore @@ -1,4 +1,7 @@ # Go compilation files *.pb.go +# Example binary +examples/examples + reports diff --git a/go/Cargo.toml b/go/Cargo.toml index 8bbc3b5b12..7a43c226d3 100644 --- a/go/Cargo.toml +++ b/go/Cargo.toml @@ -13,6 +13,8 @@ redis = { path = "../submodules/redis-rs/redis", features = ["aio", "tokio-comp" glide-core = { path = "../glide-core" } tokio = { version = "^1", features = ["rt", "macros", "rt-multi-thread", "time"] } protobuf = { version = "3.3.0", features = [] } +logger_core = {path = "../logger_core"} +tracing-subscriber = "0.3.16" [profile.release] lto = true diff --git a/go/examples/main.go b/go/examples/main.go new file mode 100644 index 0000000000..1c0dc9ffef --- /dev/null +++ b/go/examples/main.go @@ -0,0 +1,38 @@ +/** + * Copyright GLIDE-for-Redis Project Contributors - SPDX Identifier: Apache-2.0 + */ +package main + +import ( + "fmt" + "github.com/aws/glide-for-redis/go/glide/glide" + "github.com/aws/glide-for-redis/go/glide/protobuf" + "log" +) + +func main() { + fmt.Println("Starting go-glide client...") + client := glide.GlideRedisClient{} + + // TODO: Update when configuration is implemented + request := &protobuf.ConnectionRequest{ + TlsMode: protobuf.TlsMode_NoTls, + ClusterModeEnabled: false, + ReadFrom: protobuf.ReadFrom_Primary, + } + request.Addresses = append( + request.Addresses, + &protobuf.NodeAddress{Host: "localhost", Port: uint32(6379)}, + ) + connectionErr := client.ConnectToRedis(request) + if connectionErr != nil { + log.Fatal(connectionErr) + } + + closeClientErr := client.CloseClient() + if closeClientErr != nil { + log.Fatal(closeClientErr) + } + + fmt.Println("Disconnected from Redis") +} diff --git a/go/glide/glide.go b/go/glide/glide.go new file mode 100644 index 0000000000..5f486de808 --- /dev/null +++ b/go/glide/glide.go @@ -0,0 +1,75 @@ +/** + * Copyright GLIDE-for-Redis Project Contributors - SPDX Identifier: Apache-2.0 + */ +package glide + +/* +#cgo LDFLAGS: -L../target/release -lglide_rs +#include "lib.h" + +void successCallback(uintptr_t channelPtr, char *message); +void failureCallback(uintptr_t channelPtr, char *errMessage, RequestErrorType errType); +*/ +import "C" + +import ( + "fmt" + "github.com/aws/glide-for-redis/go/glide/protobuf" + "github.com/golang/protobuf/proto" + "unsafe" +) + +type GlideRedisClient struct { + coreClient unsafe.Pointer +} + +type payload struct { + value string + errMessage error +} + +type RequestType uint32 + +type ErrorType uint32 + +const ( + ClosingError = iota + RequestError + TimeoutError + ExecAbortError + ConnectionError +) + +//export successCallback +func successCallback(channelPtr C.uintptr_t, message *C.char) { + // TODO: Implement when we implement the command logic +} + +//export failureCallback +func failureCallback(channelPtr C.uintptr_t, errMessage *C.char, errType C.RequestErrorType) { + // TODO: Implement when we implement the command logic +} + +func (glideRedisClient *GlideRedisClient) ConnectToRedis(request *protobuf.ConnectionRequest) error { + marshalledRequest, err := proto.Marshal(request) + if err != nil { + return fmt.Errorf("Failed to encode connection request: %v", err) + } + byteCount := len(marshalledRequest) + requestBytes := C.CBytes(marshalledRequest) + response := (*C.struct_ConnectionResponse)(C.create_client((*C.uchar)(requestBytes), C.uintptr_t(byteCount), (C.SuccessCallback)(unsafe.Pointer(C.successCallback)), (C.FailureCallback)(unsafe.Pointer(C.failureCallback)))) + defer C.free_connection_response(response) + if response.error_message != nil { + return fmt.Errorf(C.GoString(response.error_message)) + } + glideRedisClient.coreClient = response.conn_ptr + return nil +} + +func (glideRedisClient *GlideRedisClient) CloseClient() error { + if glideRedisClient.coreClient == nil { + return fmt.Errorf("Cannot close glide client before it has been created.") + } + C.close_client(glideRedisClient.coreClient) + return nil +} diff --git a/go/glide/lib.h b/go/glide/lib.h new file mode 100644 index 0000000000..421e9c1379 --- /dev/null +++ b/go/glide/lib.h @@ -0,0 +1,90 @@ +/* + * Copyright GLIDE-for-Redis Project Contributors - SPDX Identifier: Apache-2.0 + */ + +#include +#include +#include +#include + +typedef enum RequestErrorType { + Unspecified = 0, + ExecAbort = 1, + Timeout = 2, + Disconnect = 3, +} RequestErrorType; + +/** + * The connection response. + * + * It contains either a connection or an error. It is represented as a struct instead of an enum for ease of use in the wrapper language. + * + * This struct should be freed using `free_connection_response` to avoid memory leaks. + */ +typedef struct ConnectionResponse { + const void *conn_ptr; + const char *error_message; + RequestErrorType error_type; +} ConnectionResponse; + +/** + * Success callback that is called when a Redis command succeeds. + */ +typedef void (*SuccessCallback)(uintptr_t channel_address, const char *message); + +/** + * Failure callback that is called when a Redis command fails. + * + * `error` should be manually freed by calling `free_error` after this callback is invoked, otherwise a memory leak will occur. + */ +typedef void (*FailureCallback)(uintptr_t channel_address, + const char *error_message, + RequestErrorType error_type); + +/** + * Creates a new client with the given configuration. The success callback needs to copy the given string synchronously, since it will be dropped by Rust once the callback returns. All callbacks should be offloaded to separate threads in order not to exhaust the client's thread pool. + * + * The returned `ConnectionResponse` should be manually freed by calling `free_connection_response`, otherwise a memory leak will occur. It should be freed whether or not an error occurs. + * + * # Safety + * + * * `connection_request_bytes` must point to `connection_request_len` consecutive properly initialized bytes. + * * `connection_request_len` must not be greater than `isize::MAX`. See the safety documentation of [`std::slice::from_raw_parts`](https://doc.rust-lang.org/std/slice/fn.from_raw_parts.html). + */ +const struct ConnectionResponse *create_client(const uint8_t *connection_request_bytes, + uintptr_t connection_request_len, + SuccessCallback success_callback, + FailureCallback failure_callback); + +/** + * Closes the given client, deallocating it from the heap. + * + * # Safety + * + * * `client_ptr` must be able to be safely casted to a valid `Box` via `Box::from_raw`. See the safety documentation of [`std::boxed::Box::from_raw`](https://doc.rust-lang.org/std/boxed/struct.Box.html#method.from_raw). + * * `client_ptr` must not be null. + */ +void close_client(const void *client_ptr); + +/** + * Deallocates a `ConnectionResponse`. + * + * This function also frees the contained error using `free_error`. + * + * # Safety + * + * * `connection_response_ptr` must be able to be safely casted to a valid `Box` via `Box::from_raw`. See the safety documentation of [`std::boxed::Box::from_raw`](https://doc.rust-lang.org/std/boxed/struct.Box.html#method.from_raw). + * * `connection_response_ptr` must not be null. + * * The contained `error_message` must be able to be safely casted to a valid `CString` via `CString::from_raw`. See the safety documentation of [`std::ffi::CString::from_raw`](https://doc.rust-lang.org/std/ffi/struct.CString.html#method.from_raw). + */ +void free_connection_response(const struct ConnectionResponse *connection_response_ptr); + +/** + * Deallocates an error message `CString`. + * + * # Safety + * + * * `error_msg_ptr` must be able to be safely casted to a valid `CString` via `CString::from_raw`. See the safety documentation of [`std::ffi::CString::from_raw`](https://doc.rust-lang.org/std/ffi/struct.CString.html#method.from_raw). + * * `error_msg_ptr` must not be null. + */ +void free_error(const char *error_msg_ptr); diff --git a/go/go.mod b/go/go.mod index 29fff40d72..bb2f9a7c48 100644 --- a/go/go.mod +++ b/go/go.mod @@ -8,6 +8,16 @@ require ( ) require ( + github.com/BurntSushi/toml v1.2.1 // indirect + github.com/golang/protobuf v1.5.3 // indirect + github.com/inconshreveable/mousetrap v1.1.0 // indirect + github.com/spf13/cobra v1.8.0 // indirect + github.com/spf13/pflag v1.0.5 // indirect + golang.org/x/exp/typeparams v0.0.0-20221208152030-732eee02a75a // indirect + golang.org/x/mod v0.12.0 // indirect + golang.org/x/sync v0.6.0 // indirect + golang.org/x/sys v0.11.0 // indirect + golang.org/x/tools v0.12.1-0.20230825192346-2191a27a6dc5 // indirect github.com/davecgh/go-spew v1.1.1 // indirect github.com/google/go-cmp v0.6.0 // indirect github.com/kr/pretty v0.3.1 // indirect diff --git a/go/go.sum b/go/go.sum index 22f5ed3148..4c28101968 100644 --- a/go/go.sum +++ b/go/go.sum @@ -1,6 +1,269 @@ github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E= github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ= +github.com/dgryski/go-sip13 v0.0.0-20181026042036-e10d5fee7954/go.mod h1:vAd38F8PWV+bWy6jNmig1y/TA+kYO4g3RSRF0IAv0no= +github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4= +github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo= +github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04= +github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1/go.mod h1:vR7hzQXu2zJy9AVAgeJqvqgH9Q5CA+iKCZ2gyEVpxRU= 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h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM= +google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw= +google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc= github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI= github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY= github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE= diff --git a/go/src/lib.rs b/go/src/lib.rs index 26b1dacc35..0151c482b1 100644 --- a/go/src/lib.rs +++ b/go/src/lib.rs @@ -1,9 +1,169 @@ /** * Copyright GLIDE-for-Redis Project Contributors - SPDX Identifier: Apache-2.0 */ -use std::ffi::c_void; +use glide_core::client::Client as GlideClient; +use glide_core::connection_request; +use glide_core::errors; +use glide_core::errors::RequestErrorType; +use protobuf::Message; +use std::{ + ffi::{c_void, CString}, + os::raw::c_char, +}; +use tokio::runtime::Builder; +use tokio::runtime::Runtime; +/// Success callback that is called when a Redis command succeeds. +// TODO: Change message type when implementing command logic +pub type SuccessCallback = + unsafe extern "C" fn(channel_address: usize, message: *const c_char) -> (); + +/// Failure callback that is called when a Redis command fails. +/// +/// `error` should be manually freed by calling `free_error` after this callback is invoked, otherwise a memory leak will occur. +pub type FailureCallback = unsafe extern "C" fn( + channel_address: usize, + error_message: *const c_char, + error_type: RequestErrorType, +) -> (); + +/// The connection response. +/// +/// It contains either a connection or an error. It is represented as a struct instead of an enum for ease of use in the wrapper language. +/// +/// This struct should be freed using `free_connection_response` to avoid memory leaks. +#[repr(C)] +pub struct ConnectionResponse { + conn_ptr: *const c_void, + error_message: *const c_char, + error_type: RequestErrorType, +} + +/// The glide client. +#[allow(dead_code)] +pub struct Client { + client: GlideClient, + success_callback: SuccessCallback, + failure_callback: FailureCallback, + runtime: Runtime, +} + +struct CreateClientError { + message: String, + error_type: RequestErrorType, +} + +fn create_client_internal( + connection_request_bytes: &[u8], + success_callback: SuccessCallback, + failure_callback: FailureCallback, +) -> Result { + let request = connection_request::ConnectionRequest::parse_from_bytes(connection_request_bytes) + .map_err(|err| CreateClientError { + message: err.to_string(), + error_type: RequestErrorType::Unspecified, + })?; + let runtime = Builder::new_multi_thread() + .enable_all() + .thread_name("GLIDE for Redis Go thread") + .build() + .map_err(|err| { + let redis_error = err.into(); + CreateClientError { + message: errors::error_message(&redis_error), + error_type: errors::error_type(&redis_error), + } + })?; + let _runtime_handle = runtime.enter(); + let client = runtime + .block_on(GlideClient::new(request)) + .map_err(|err| CreateClientError { + message: err.to_string(), + error_type: RequestErrorType::Disconnect, + })?; + Ok(Client { + client, + success_callback, + failure_callback, + runtime, + }) +} + +/// Creates a new client with the given configuration. The success callback needs to copy the given string synchronously, since it will be dropped by Rust once the callback returns. All callbacks should be offloaded to separate threads in order not to exhaust the client's thread pool. +/// +/// The returned `ConnectionResponse` should be manually freed by calling `free_connection_response`, otherwise a memory leak will occur. It should be freed whether or not an error occurs. +/// +/// # Safety +/// +/// * `connection_request_bytes` must point to `connection_request_len` consecutive properly initialized bytes. +/// * `connection_request_len` must not be greater than `isize::MAX`. See the safety documentation of [`std::slice::from_raw_parts`](https://doc.rust-lang.org/std/slice/fn.from_raw_parts.html). +#[no_mangle] +pub unsafe extern "C" fn create_client( + connection_request_bytes: *const u8, + connection_request_len: usize, + success_callback: SuccessCallback, + failure_callback: FailureCallback, +) -> *const ConnectionResponse { + let request_bytes = + unsafe { std::slice::from_raw_parts(connection_request_bytes, connection_request_len) }; + let response = match create_client_internal(request_bytes, success_callback, failure_callback) { + Err(err) => ConnectionResponse { + conn_ptr: std::ptr::null(), + error_message: CString::into_raw(CString::new(err.message).unwrap()), + error_type: err.error_type, + }, + Ok(client) => ConnectionResponse { + conn_ptr: Box::into_raw(Box::new(client)) as *const c_void, + error_message: std::ptr::null(), + error_type: RequestErrorType::Unspecified, + }, + }; + Box::into_raw(Box::new(response)) +} + +/// Closes the given client, deallocating it from the heap. +/// +/// # Safety +/// +/// * `client_ptr` must be able to be safely casted to a valid `Box` via `Box::from_raw`. See the safety documentation of [`std::boxed::Box::from_raw`](https://doc.rust-lang.org/std/boxed/struct.Box.html#method.from_raw). +/// * `client_ptr` must not be null. +#[no_mangle] +pub unsafe extern "C" fn close_client(client_ptr: *const c_void) { + let client_ptr = unsafe { Box::from_raw(client_ptr as *mut Client) }; + let _runtime_handle = client_ptr.runtime.enter(); + drop(client_ptr); +} + +/// Deallocates a `ConnectionResponse`. +/// +/// This function also frees the contained error using `free_error`. +/// +/// # Safety +/// +/// * `connection_response_ptr` must be able to be safely casted to a valid `Box` via `Box::from_raw`. See the safety documentation of [`std::boxed::Box::from_raw`](https://doc.rust-lang.org/std/boxed/struct.Box.html#method.from_raw). +/// * `connection_response_ptr` must not be null. +/// * The contained `error_message` must be able to be safely casted to a valid `CString` via `CString::from_raw`. See the safety documentation of [`std::ffi::CString::from_raw`](https://doc.rust-lang.org/std/ffi/struct.CString.html#method.from_raw). +#[no_mangle] +pub unsafe extern "C" fn free_connection_response( + connection_response_ptr: *const ConnectionResponse, +) { + let connection_response = + unsafe { Box::from_raw(connection_response_ptr as *mut ConnectionResponse) }; + let error_message = connection_response.error_message; + drop(connection_response); + if error_message != std::ptr::null() { + free_error(error_message); + } +} + +/// Deallocates an error message `CString`. +/// +/// # Safety +/// +/// * `error_msg_ptr` must be able to be safely casted to a valid `CString` via `CString::from_raw`. See the safety documentation of [`std::ffi::CString::from_raw`](https://doc.rust-lang.org/std/ffi/struct.CString.html#method.from_raw). +/// * `error_msg_ptr` must not be null. #[no_mangle] -pub extern "C" fn create_connection() -> *const c_void { - todo!() +pub unsafe extern "C" fn free_error(error_msg_ptr: *const c_char) { + let error_msg = unsafe { CString::from_raw(error_msg_ptr as *mut c_char) }; + drop(error_msg); }