weavegraph 0.7.0

Graph-driven, concurrent agent workflow framework with versioned state, deterministic barrier merges, and rich diagnostics.
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

//! ID generation utilities for run, step, node, and session identifiers.
//!
//! Supports UUID-based random generation and deterministic seeded generation
//! for testing and reproducibility.

use std::sync::atomic::{AtomicU64, Ordering};
use uuid::Uuid;

/// Controls how [`IdGenerator`] produces IDs.
#[derive(Debug, Clone, Default)]
pub struct IdConfig {
    /// When set, IDs are derived from this seed rather than a random UUID.
    pub seed: Option<u64>,
    /// Prepended to every ID produced by [`IdGenerator::generate_id`].
    pub prefix: Option<String>,
    /// Append a Unix-timestamp suffix (`-t<secs>`) to each generated ID.
    pub include_timestamp: bool,
    /// Append a monotonically increasing counter to each generated ID.
    pub use_counter: bool,
}

/// Thread-safe ID generator with configurable strategies.
///
/// # Example
///
/// ```rust
/// use weavegraph::utils::id_generator::{IdGenerator, IdConfig};
///
/// let id_gen = IdGenerator::new();
/// assert!(id_gen.generate_run_id().starts_with("run-"));
///
/// let det = IdGenerator::with_config(IdConfig {
///     seed: Some(1),
///     use_counter: true,
///     ..Default::default()
/// });
/// assert_ne!(det.generate_id(), det.generate_id());
/// ```
#[derive(Debug, Default)]
pub struct IdGenerator {
    config: IdConfig,
    counter: AtomicU64,
}

impl IdGenerator {
    /// Create a generator with default (random UUID) settings.
    #[must_use]
    pub fn new() -> Self {
        Self::default()
    }

    /// Create a generator with custom configuration.
    #[must_use]
    pub fn with_config(config: IdConfig) -> Self {
        Self {
            config,
            counter: AtomicU64::new(0),
        }
    }

    /// Generate an ID, applying seed, counter, timestamp, and prefix from config.
    ///
    /// ```rust
    /// use weavegraph::utils::id_generator::IdGenerator;
    ///
    /// assert!(!IdGenerator::new().generate_id().is_empty());
    /// ```
    #[must_use]
    pub fn generate_id(&self) -> String {
        let mut id = self.base_id();
        if self.config.include_timestamp {
            let ts = chrono::Utc::now().timestamp();
            id = format!("{id}-t{ts}");
        }
        if let Some(p) = &self.config.prefix {
            id = format!("{p}-{id}");
        }
        id
    }

    /// Generate an ID prefixed with `prefix`, bypassing config prefix and timestamp.
    ///
    /// ```rust
    /// use weavegraph::utils::id_generator::IdGenerator;
    ///
    /// assert!(IdGenerator::new().generate_id_with_prefix("session").starts_with("session-"));
    /// ```
    #[must_use]
    pub fn generate_id_with_prefix(&self, prefix: &str) -> String {
        format!("{prefix}-{}", self.base_id())
    }

    /// Generate a `run-<id>` identifier.
    #[must_use]
    pub fn generate_run_id(&self) -> String {
        self.generate_id_with_prefix("run")
    }

    /// Generate a `step-<id>` identifier.
    #[must_use]
    pub fn generate_step_id(&self) -> String {
        self.generate_id_with_prefix("step")
    }

    /// Generate a `node-<id>` identifier.
    #[must_use]
    pub fn generate_node_id(&self) -> String {
        self.generate_id_with_prefix("node")
    }

    /// Generate a `session-<id>` identifier.
    #[must_use]
    pub fn generate_session_id(&self) -> String {
        self.generate_id_with_prefix("session")
    }

    fn base_id(&self) -> String {
        match (self.config.seed, self.config.use_counter) {
            (Some(seed), true) => {
                let n = self.counter.fetch_add(1, Ordering::Relaxed);
                format!("seeded-{seed}-{n}")
            }
            (Some(seed), false) => format!("seeded-{seed}"),
            (None, true) => {
                let n = self.counter.fetch_add(1, Ordering::Relaxed);
                format!("counter-{n}")
            }
            (None, false) => Uuid::new_v4().to_string(),
        }
    }
}