lenso-platform-core 0.1.5

Core runtime primitives for the Lenso backend framework.
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
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131

//! Worker process runtime-config knobs, live-tunable via the Console.
//!
//! These are platform-runtime concerns (poll cadence, batch size), not a
//! product module, so they are registered as platform-owned descriptors at the
//! composition root rather than via a module manifest.

use crate::runtime_config::{
    RuntimeConfigDescriptor, RuntimeConfigGroupDescriptor, RuntimeConfigScope, RuntimeConfigType,
};
use serde::Deserialize;
use serde_json::json;
use std::sync::LazyLock;

/// Worker config resolved from the snapshot under the `worker.` key prefix.
#[derive(Debug, Clone, Deserialize)]
pub struct WorkerRuntimeConfig {
    pub poll_interval_ms: u64,
    pub batch_size: u64,
}

impl Default for WorkerRuntimeConfig {
    fn default() -> Self {
        Self {
            poll_interval_ms: 500,
            batch_size: 25,
        }
    }
}

/// Platform-owned, worker-scoped runtime config descriptors.
pub static RUNTIME_CONFIG_GROUPS: LazyLock<Vec<RuntimeConfigGroupDescriptor>> =
    LazyLock::new(|| {
        vec![RuntimeConfigGroupDescriptor {
            id: "worker.runtime",
            label: "Worker Runtime",
            description: "Worker polling and claim behavior.",
            order: 40,
        }]
    });

pub static RUNTIME_CONFIG: LazyLock<Vec<RuntimeConfigDescriptor>> = LazyLock::new(|| {
    vec![
        RuntimeConfigDescriptor {
            key: "worker.poll_interval_ms".to_owned(),
            scope: RuntimeConfigScope::Service("worker"),
            group: Some("worker.runtime"),
            section: None,
            order: 10,
            visible_when: None,
            generated: None,
            value_type: RuntimeConfigType::Int {
                min: Some(50),
                max: Some(60_000),
            },
            default: json!(500),
            editable: true,
            restart_only: false,
            description: "Milliseconds the worker sleeps between poll ticks.",
        },
        RuntimeConfigDescriptor {
            key: "worker.batch_size".to_owned(),
            scope: RuntimeConfigScope::Service("worker"),
            group: Some("worker.runtime"),
            section: None,
            order: 20,
            visible_when: None,
            generated: None,
            value_type: RuntimeConfigType::Int {
                min: Some(1),
                max: Some(1_000),
            },
            default: json!(25),
            editable: true,
            restart_only: false,
            description: "Maximum outbox events / function runs claimed per tick.",
        },
    ]
});

#[cfg(test)]
mod tests {
    use super::*;
    use crate::runtime_config::{RuntimeConfigRegistry, RuntimeConfigSnapshot};
    use std::collections::BTreeMap;

    #[test]
    fn reads_defaults_from_snapshot() {
        let registry = RuntimeConfigRegistry::try_new(RUNTIME_CONFIG.clone()).unwrap();
        let snapshot = RuntimeConfigSnapshot::resolve(&registry, "worker", &BTreeMap::new());
        let cfg: WorkerRuntimeConfig = snapshot.get("worker").unwrap();
        assert_eq!(cfg.poll_interval_ms, 500);
        assert_eq!(cfg.batch_size, 25);
    }

    #[test]
    fn default_impl_matches_descriptor_defaults() {
        let defaults = WorkerRuntimeConfig::default();
        let poll = RUNTIME_CONFIG
            .iter()
            .find(|d| d.key == "worker.poll_interval_ms")
            .unwrap();
        let batch = RUNTIME_CONFIG
            .iter()
            .find(|d| d.key == "worker.batch_size")
            .unwrap();
        assert_eq!(defaults.poll_interval_ms, poll.default.as_u64().unwrap());
        assert_eq!(defaults.batch_size, batch.default.as_u64().unwrap());
    }

    #[test]
    fn poll_interval_out_of_range_rejected() {
        let poll = RUNTIME_CONFIG
            .iter()
            .find(|d| d.key == "worker.poll_interval_ms")
            .unwrap();
        assert!(poll.validate(&json!(500)).is_ok());
        assert!(poll.validate(&json!(49)).is_err());
        assert!(poll.validate(&json!(60_001)).is_err());
    }

    #[test]
    fn batch_size_out_of_range_rejected() {
        let batch = RUNTIME_CONFIG
            .iter()
            .find(|d| d.key == "worker.batch_size")
            .unwrap();
        assert!(batch.validate(&json!(25)).is_ok());
        assert!(batch.validate(&json!(0)).is_err());
        assert!(batch.validate(&json!(1001)).is_err());
    }
}