golem-rust 2.0.0

Golem Rust tooling library that facilitates writing Golem backends in Rust
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108

// Copyright 2024-2026 Golem Cloud
//
// 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 crate::golem_agentic::golem::agent::common::AgentConfigDeclaration;
use crate::golem_agentic::golem::agent::host::get_config_value;
use crate::value_and_type::{FromValueAndType, IntoValue};
use golem_wasm::golem_core_1_5_x::types::ValueAndType;
use std::marker::PhantomData;

pub struct Config<T>(PhantomData<T>);

impl<T> Default for Config<T> {
    fn default() -> Self {
        Self::new()
    }
}

impl<T> Config<T> {
    /// Creates a config handle.
    ///
    /// This exists primarily for SDK-generated code that materializes
    /// `#[agent_config]` constructor parameters. User code should receive
    /// `Config<T>` through constructor injection instead of constructing it
    /// manually, because agent config metadata is only registered from
    /// `#[agent_config]` constructor parameters.
    pub fn new() -> Self {
        Self(PhantomData)
    }

    pub fn get(&self) -> T
    where
        T: ConfigSchema,
    {
        T::load(&[])
    }

    pub fn config_entries() -> Vec<AgentConfigDeclaration>
    where
        T: ConfigSchema,
    {
        T::describe_config(&[])
    }
}

pub trait ConfigSchema: Sized {
    /// Version of this type that can be used to get a remote
    /// agent instance using rpc.
    type RpcType: IntoRpcConfigParam;

    fn describe_config(path: &[String]) -> Vec<AgentConfigDeclaration>;
    fn load(path: &[String]) -> Self;
}

#[doc(hidden)]
pub trait IntoRpcConfigParam: Sized {
    fn into_rpc_param(
        self,
        path: &[String],
    ) -> Vec<crate::golem_agentic::golem::agent::common::TypedAgentConfigValue>;
}

pub struct Secret<T> {
    path: Vec<String>,
    config_type: PhantomData<T>,
}

impl<T> Secret<T> {
    pub fn new(path: Vec<String>) -> Self {
        Self {
            path,
            config_type: PhantomData::<T>,
        }
    }

    pub fn get(&self) -> T
    where
        T: FromValueAndType + IntoValue,
    {
        let typ = T::get_type();
        let value = get_config_value(&self.path, &typ);
        T::from_value_and_type(ValueAndType { value, typ })
            .expect("failed deserializing secret value")
    }
}

#[doc(hidden)]
pub trait InnerTypeHelper {
    type Type;
}

impl<T> InnerTypeHelper for Secret<T> {
    type Type = T;
}

impl<T> InnerTypeHelper for Config<T> {
    type Type = T;
}