langsmith-rust 0.1.3

Rust crate for manual tracing to LangSmith, providing similar ergonomics to the Python and TypeScript SDKs
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

use crate::error::Result;
use crate::models::run::Run;
use async_trait::async_trait;

/// Strategy pattern for different tracing implementations
#[async_trait]
pub trait TracingStrategy: Send + Sync {
    /// Trace the start of a run
    async fn trace_start(&self, run: &Run) -> Result<()>;
    
    /// Trace the end of a run
    async fn trace_end(&self, run: &Run) -> Result<()>;
    
    /// Trace an error in a run
    async fn trace_error(&self, run: &Run, error: &str) -> Result<()>;
}

/// Async tracing strategy (default)
pub struct AsyncTracingStrategy {
    // Can hold client or other dependencies
}

impl AsyncTracingStrategy {
    pub fn new() -> Self {
        Self {}
    }
}

#[async_trait]
impl TracingStrategy for AsyncTracingStrategy {
    async fn trace_start(&self, run: &Run) -> Result<()> {
        use crate::client::LangSmithClient;
        let client = LangSmithClient::new()?;
        client.post_run(run).await
    }

    async fn trace_end(&self, run: &Run) -> Result<()> {
        use crate::client::LangSmithClient;
        use crate::models::run::RunUpdate;
        let client = LangSmithClient::new()?;
        let updates = RunUpdate::from(run);
        client.patch_run(run.id, &updates).await
    }

    async fn trace_error(&self, run: &Run, error: &str) -> Result<()> {
        use crate::client::LangSmithClient;
        use crate::models::run::RunUpdate;
        let client = LangSmithClient::new()?;
        let mut updates = RunUpdate::from(run);
        updates.error = Some(error.to_string());
        client.patch_run(run.id, &updates).await
    }
}

/// Sync tracing strategy (uses blocking runtime)
pub struct SyncTracingStrategy {
    // Can hold client or other dependencies
}

impl SyncTracingStrategy {
    pub fn new() -> Self {
        Self {}
    }
}

#[async_trait]
impl TracingStrategy for SyncTracingStrategy {
    async fn trace_start(&self, run: &Run) -> Result<()> {
        use crate::client::LangSmithClient;
        let rt = tokio::runtime::Runtime::new().unwrap();
        let client = LangSmithClient::new()?;
        rt.block_on(client.post_run(run))
    }

    async fn trace_end(&self, run: &Run) -> Result<()> {
        use crate::client::LangSmithClient;
        use crate::models::run::RunUpdate;
        let rt = tokio::runtime::Runtime::new().unwrap();
        let client = LangSmithClient::new()?;
        let updates = RunUpdate::from(run);
        rt.block_on(client.patch_run(run.id, &updates))
    }

    async fn trace_error(&self, run: &Run, error: &str) -> Result<()> {
        use crate::client::LangSmithClient;
        use crate::models::run::RunUpdate;
        let rt = tokio::runtime::Runtime::new().unwrap();
        let client = LangSmithClient::new()?;
        let mut updates = RunUpdate::from(run);
        updates.error = Some(error.to_string());
        rt.block_on(client.patch_run(run.id, &updates))
    }
}