Store ParticleParams in AquamarineVM, pass them to call_service

Cargo.lock

@@ -44,6 +44,7 @@ name = "aquamarine-vm"
 version = "0.1.6"
 dependencies = [
  "fluence-faas",
+ "log",
  "maplit",
  "serde",
  "serde_json",
@@ -722,15 +723,6 @@ dependencies = [
  "serde_json",
 ]
 
-[[package]]
-name = "fluence"
-version = "0.2.13"
-source = "git+https://github.com/fluencelabs/rust-sdk#71591f412cb65879d74e8c38838e827ab74d8802"
-dependencies = [
- "fluence-sdk-macro 0.2.13 (git+https://github.com/fluencelabs/rust-sdk)",
- "fluence-sdk-main 0.2.13 (git+https://github.com/fluencelabs/rust-sdk)",
-]
-
 [[package]]
 name = "fluence"
 version = "0.2.13"
@@ -741,6 +733,15 @@ dependencies = [
  "fluence-sdk-main 0.2.13 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "fluence"
+version = "0.2.13"
+source = "git+https://github.com/fluencelabs/rust-sdk#71591f412cb65879d74e8c38838e827ab74d8802"
+dependencies = [
+ "fluence-sdk-macro 0.2.13 (git+https://github.com/fluencelabs/rust-sdk)",
+ "fluence-sdk-main 0.2.13 (git+https://github.com/fluencelabs/rust-sdk)",
+]
+
 [[package]]
 name = "fluence-app-service"
 version = "0.1.18"
@@ -779,14 +780,6 @@ dependencies = [
  "wasmer-wasi-fl",
 ]
 
-[[package]]
-name = "fluence-sdk-macro"
-version = "0.2.13"
-source = "git+https://github.com/fluencelabs/rust-sdk#71591f412cb65879d74e8c38838e827ab74d8802"
-dependencies = [
- "fluence-sdk-wit 0.2.13 (git+https://github.com/fluencelabs/rust-sdk)",
-]
-
 [[package]]
 name = "fluence-sdk-macro"
 version = "0.2.13"
@@ -797,13 +790,11 @@ dependencies = [
 ]
 
 [[package]]
-name = "fluence-sdk-main"
+name = "fluence-sdk-macro"
 version = "0.2.13"
 source = "git+https://github.com/fluencelabs/rust-sdk#71591f412cb65879d74e8c38838e827ab74d8802"
 dependencies = [
- "fluence-sdk-macro 0.2.13 (git+https://github.com/fluencelabs/rust-sdk)",
+ "fluence-sdk-wit 0.2.13 (git+https://github.com/fluencelabs/rust-sdk)",
- "log",
- "serde",
 ]
 
 [[package]]
@@ -818,9 +809,20 @@ dependencies = [
 ]
 
 [[package]]
-name = "fluence-sdk-wit"
+name = "fluence-sdk-main"
 version = "0.2.13"
 source = "git+https://github.com/fluencelabs/rust-sdk#71591f412cb65879d74e8c38838e827ab74d8802"
+dependencies = [
+ "fluence-sdk-macro 0.2.13 (git+https://github.com/fluencelabs/rust-sdk)",
+ "log",
+ "serde",
+]
+
+[[package]]
+name = "fluence-sdk-wit"
+version = "0.2.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8da5f51cddeae52ff5b91d1a5d8be90e54629f4887f89f8d7501b829b374fe6a"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -833,8 +835,7 @@ dependencies = [
 [[package]]
 name = "fluence-sdk-wit"
 version = "0.2.13"
-source = "registry+https://github.com/rust-lang/crates.io-index"
+source = "git+https://github.com/fluencelabs/rust-sdk#71591f412cb65879d74e8c38838e827ab74d8802"
-checksum = "8da5f51cddeae52ff5b91d1a5d8be90e54629f4887f89f8d7501b829b374fe6a"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1576,9 +1577,9 @@ checksum = "13bd41f508810a131401606d54ac32a467c97172d74ba7662562ebba5ad07fa0"
 
 [[package]]
 name = "openssl"
-version = "0.10.31"
+version = "0.10.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8d008f51b1acffa0d3450a68606e6a51c123012edaacb0f4e1426bd978869187"
+checksum = "038d43985d1ddca7a9900630d8cd031b56e4794eecc2e9ea39dd17aa04399a70"
 dependencies = [
  "bitflags",
  "cfg-if 1.0.0",
@@ -1596,9 +1597,9 @@ checksum = "77af24da69f9d9341038eba93a073b1fdaaa1b788221b00a69bce9e762cb32de"
 
 [[package]]
 name = "openssl-sys"
-version = "0.9.59"
+version = "0.9.60"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "de52d8eabd217311538a39bba130d7dea1f1e118010fee7a033d966845e7d5fe"
+checksum = "921fc71883267538946025deffb622905ecad223c28efbfdef9bb59a0175f3e6"
 dependencies = [
  "autocfg",
  "cc",
@@ -2205,7 +2206,7 @@ checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
 [[package]]
 name = "stepper-interface"
 version = "0.1.0"
-source = "git+https://github.com/fluencelabs/aquamarine#724117547205d8ccc742d325b542af8f3df801b8"
+source = "git+https://github.com/fluencelabs/aquamarine?branch=master#5cb4cc0fb0c149a4bd3160dd0bac9c3d5ac3db7d"
 dependencies = [
  "fluence 0.2.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde",

aquamarine-vm/Cargo.toml

@@ -15,8 +15,9 @@ fluence-faas = { path = "../fluence-faas", version = "0.1.18" }
 stepper-interface = { git = "https://github.com/fluencelabs/aquamarine", branch = "master" }
 
 maplit = "1.0.2"
-serde_json = "1.0.57"
+serde_json = "1.0.60"
-serde = "1.0.116"
+serde = "1.0.118"
+log = "0.4.11"
 
 [features]
 # enable raw AquamarineVM API intended for testing

aquamarine-vm/src/aquamarine_stepper_vm.rs

@@ -14,29 +14,39 @@
  * limitations under the License.
  */
 
-use crate::Result;
+use crate::{Result, IType};
 use crate::AquamarineVMError;
 use crate::config::AquamarineVMConfig;
 
-use fluence_faas::FaaSConfig;
+use fluence_faas::{FaaSConfig, HostExportedFunc};
 use fluence_faas::FluenceFaaS;
 use fluence_faas::HostImportDescriptor;
 use fluence_faas::IValue;
 use stepper_interface::StepperOutcome;
 
 use std::path::PathBuf;
-use std::path::Path;
+use std::cell::{RefCell};
+use std::rc::Rc;
+use std::ops::Deref;
+use std::borrow::Cow;
 
 const CALL_SERVICE_NAME: &str = "call_service";
 const CURRENT_PEER_ID_ENV_NAME: &str = "CURRENT_PEER_ID";
 
 unsafe impl Send for AquamarineVM {}
 
+#[derive(Debug, Default)]
+pub struct ParticleParams {
+    pub init_peer_id: String,
+    pub particle_id: String,
+}
+
 pub struct AquamarineVM {
     faas: FluenceFaaS,
     particle_data_store: PathBuf,
     /// file name of the AIR interpreter .wasm
     wasm_filename: String,
+    current_particle: Rc<RefCell<ParticleParams>>,
 }
 
 impl AquamarineVM {
@@ -44,12 +54,34 @@ impl AquamarineVM {
     pub fn new(config: AquamarineVMConfig) -> Result<Self> {
         use AquamarineVMError::InvalidDataStorePath;
 
+        let current_particle: Rc<RefCell<ParticleParams>> = <_>::default();
+        let call_service = config.call_service;
+        let params = current_particle.clone();
+        let call_service_closure: HostExportedFunc = Box::new(move |_, ivalues: Vec<IValue>| {
+            let params = params.deref().try_borrow();
+            match params {
+                Ok(params) => call_service(params.deref(), ivalues),
+                Err(err) => {
+                    let err = AquamarineVMError::BorrowParticleParams(err);
+                    log::error!("UNEXPECTED: {}", err);
+                    // TODO: return error to the stepper?
+                    None
+                }
+            }
+        });
+        let import_descriptor = HostImportDescriptor {
+            host_exported_func: call_service_closure,
+            argument_types: vec![IType::String, IType::String, IType::String, IType::String],
+            output_type: Some(IType::Record(0)),
+            error_handler: None,
+        };
+
         let (wasm_dir, wasm_filename) = split_dirname(config.aquamarine_wasm_path)?;
 
         let faas_config = make_faas_config(
             wasm_dir,
             &wasm_filename,
-            config.call_service,
+            import_descriptor,
             config.current_peer_id,
             config.logging_mask,
         );
@@ -63,6 +95,7 @@ impl AquamarineVM {
             faas,
             particle_data_store,
             wasm_filename,
+            current_particle,
         };
 
         Ok(aqua_vm)
@@ -73,11 +106,20 @@ impl AquamarineVM {
         init_user_id: impl Into<String>,
         aqua: impl Into<String>,
         data: impl Into<Vec<u8>>,
-        particle_id: impl AsRef<Path>,
+        particle_id: Cow<'_, str>,
     ) -> Result<StepperOutcome> {
         use AquamarineVMError::PersistDataError;
 
-        let prev_data_path = self.particle_data_store.join(particle_id);
+        match self.current_particle.try_borrow_mut() {
+            Ok(mut params) => params.particle_id = particle_id.to_string(),
+            Err(err) => {
+                let err = AquamarineVMError::BorrowMutParticleParams(err);
+                log::error!("UNEXPECTED: {}", err);
+                return Err(err);
+            }
+        }
+
+        let prev_data_path = self.particle_data_store.join(particle_id.deref());
         // TODO: check for errors related to invalid file content (such as invalid UTF8 string)
         let prev_data = std::fs::read_to_string(&prev_data_path).unwrap_or_default();
 

aquamarine-vm/src/config.rs

@@ -14,16 +14,20 @@
  * limitations under the License.
  */
 
-use fluence_faas::HostImportDescriptor;
 use std::path::PathBuf;
 
+use crate::aquamarine_stepper_vm::ParticleParams;
+use crate::IValue;
+
+type CallServiceClosure = Box<dyn Fn(&ParticleParams, Vec<IValue>) -> Option<IValue> + 'static>;
+
 /// Describes behaviour of the Aquamarine VM stepper.
 pub struct AquamarineVMConfig {
     /// Path to a aquamarine stepper Wasm file.
     pub aquamarine_wasm_path: PathBuf,
 
     /// Descriptor of a closure that will be invoked on call_service call from Aquamarine stepper.
-    pub call_service: HostImportDescriptor,
+    pub call_service: CallServiceClosure,
 
     /// Current peer id.
     pub current_peer_id: String,

aquamarine-vm/src/errors.rs

@@ -19,6 +19,7 @@ use fluence_faas::FaaSError;
 use std::io::Error as IOError;
 use std::error::Error;
 use std::path::PathBuf;
+use std::cell::{BorrowError, BorrowMutError};
 
 #[derive(Debug)]
 pub enum AquamarineVMError {
@@ -40,6 +41,18 @@ pub enum AquamarineVMError {
         io_error: Option<IOError>,
         reason: &'static str,
     },
+
+    /// [[BorrowError]] and [[BorrowMutError] are very serious errors, and shouldn't happen. If happened,
+    /// that means RefCell invariants are broken – we have borrowed [[AquamarineVm::current_particle]] twice.
+    /// Running in several threads? I don't know how else that could be possible.
+    /// But if that happened, chances are that we must avoid using RefCell,
+    /// and switch to [[parking_lot::Mutex]] or [[crossbeam_utils::AtomicCell]]
+
+    /// try_borrow failed on [[AquamarineVm::current_particle]]
+    BorrowParticleParams(BorrowError),
+
+    /// try_borrow_mut failed on [[AquamarineVm::current_particle]]
+    BorrowMutParticleParams(BorrowMutError),
 }
 
 impl Error for AquamarineVMError {}
@@ -69,6 +82,22 @@ impl std::fmt::Display for AquamarineVMError {
                 "path to AIR interpreter .wasm ({:?}) is invalid: {}; IO Error: {:?}",
                 invalid_path, reason, io_error
             ),
+
+            AquamarineVMError::BorrowMutParticleParams(err) => {
+                write!(
+                    f,
+                    "RefCell::try_borrow_mut failed for AquamarineVm::current_particle: {}",
+                    err
+                )
+            }
+
+            AquamarineVMError::BorrowParticleParams(err) => {
+                write!(
+                    f,
+                    "RefCell::try_borrow failed for AquamarineVm::current_particle: {}",
+                    err
+                )
+            }
         }
     }
 }