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106
aquamarine-vm/src/args.rs
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106
aquamarine-vm/src/args.rs
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/*
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* Copyright 2020 Fluence Labs Limited
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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use crate::IValue;
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use crate::args_error::ArgsError;
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use crate::args_error::ArgsError::{MissingField, SerdeJson};
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use fluence_faas::SecurityTetraplet;
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use serde::Deserialize;
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use serde_json::Value as JValue;
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#[derive(Debug)]
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/// Arguments passed by VM to host on call_service
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pub struct CallServiceArgs {
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pub service_id: String,
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pub function_name: String,
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pub function_args: Vec<serde_json::Value>,
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pub tetraplets: Vec<Vec<SecurityTetraplet>>,
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}
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impl CallServiceArgs {
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/// Construct Args from `Vec<IValue>`
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pub fn parse(call_args: Vec<IValue>) -> Result<Self, ArgsError> {
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let mut call_args = call_args.into_iter();
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let service_id = call_args
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.next()
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.and_then(into_string)
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.ok_or(MissingField("service_id"))?;
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let fname = call_args
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.next()
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.and_then(into_string)
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.ok_or(MissingField("fname"))?;
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let function_args = call_args
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.next()
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.as_ref()
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.and_then(as_str)
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.ok_or(MissingField("args"))
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.and_then(|v| {
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serde_json::from_str(v).map_err(|err| SerdeJson { field: "args", err })
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})?;
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let tetraplets: Vec<Vec<SecurityTetraplet>> = call_args
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.next()
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.as_ref()
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.and_then(as_str)
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.ok_or(MissingField("tetraplets"))
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.and_then(|v| {
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serde_json::from_str(v).map_err(|err| SerdeJson {
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field: "tetraplets",
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err,
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})
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})?;
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Ok(Self {
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service_id,
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function_name: fname,
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function_args,
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tetraplets,
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})
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}
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/// Retrieves next json value from iterator, parse it to T
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pub fn next<T: for<'de> Deserialize<'de>>(
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field: &'static str,
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args: &mut impl Iterator<Item = JValue>,
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) -> Result<T, ArgsError> {
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let value = args.next().ok_or(MissingField(field))?;
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let value: T = Self::deserialize(field, value)?;
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Ok(value)
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}
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/// Retrieves a json value from iterator if it's not empty, and parses it to T
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pub fn maybe_next<T: for<'de> Deserialize<'de>>(
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field: &'static str,
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args: &mut impl Iterator<Item = JValue>,
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) -> Result<Option<T>, ArgsError> {
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let value = ok_get!(args.next());
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let value: T = Self::deserialize(field, value)?;
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Ok(Some(value))
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}
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fn deserialize<T: for<'de> Deserialize<'de>>(
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field: &'static str,
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v: JValue,
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) -> Result<T, ArgsError> {
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serde_json::from_value(v).map_err(|err| SerdeJson { err, field })
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}
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}
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57
aquamarine-vm/src/args_error.rs
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57
aquamarine-vm/src/args_error.rs
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/*
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* Copyright 2020 Fluence Labs Limited
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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use serde_json::Value as JValue;
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use std::borrow::Cow;
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use std::error::Error;
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use std::fmt::{Display, Formatter};
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#[derive(Debug)]
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pub enum ArgsError {
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MissingField(&'static str),
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SerdeJson {
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field: &'static str,
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err: serde_json::Error,
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},
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InvalidFormat {
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field: &'static str,
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err: Cow<'static, str>,
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},
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}
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impl From<ArgsError> for JValue {
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fn from(err: ArgsError) -> Self {
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JValue::String(format!("ArgsError: {}", err))
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}
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}
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impl Error for ArgsError {}
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impl Display for ArgsError {
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fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
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match self {
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ArgsError::MissingField(field) => {
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write!(f, "Field {} is missing from args to call_service", field)
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}
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ArgsError::SerdeJson { err, field } => {
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write!(f, "Error while deserializing field {}: {:?}", field, err)
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}
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ArgsError::InvalidFormat { field, err } => {
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write!(f, "Error while deserializing field {}: {:?}", field, err)
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}
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}
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}
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}
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@ -27,6 +27,8 @@
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mod aquamarine_stepper_vm;
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mod config;
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mod errors;
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mod args;
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mod args_error;
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pub use aquamarine_stepper_vm::AquamarineVM;
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pub use aquamarine_stepper_vm::ParticleParameters;
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