camel_core/
lib.rs

1//! # Camel Core
2//!
3//! This crate provides the core functionality for the Apache Camel implementation in Rust.
4//!
5//! ## Tracer EIP
6//!
7//! The Tracer Enterprise Integration Pattern (EIP) provides automatic message flow tracing
8//! throughout your Camel routes. It captures detailed information about each step as messages
9//! flow through the integration routes, helping with debugging, monitoring, and observability.
10//!
11//! ### Configuration
12//!
13//! You can configure the tracer in your `Camel.toml` file:
14//!
15//! ```toml
16//! [observability.tracer]
17//! enabled = true
18//! detail_level = "minimal"  # minimal | medium | full
19//!
20//! [observability.tracer.outputs.stdout]
21//! enabled = true
22//! format = "json"
23//! ```
24//!
25//! Or enable it programmatically:
26//!
27//! ```ignore
28//! use camel_core::CamelContext;
29//! let mut ctx = CamelContext::builder().build().await.unwrap();
30//! ctx.set_tracing(true).await;
31//! ```
32//!
33//! ### Span Fields
34//!
35//! Each trace span includes the following fields:
36//!
37//! - `correlation_id`: Unique identifier that links all spans in a single message flow
38//! - `route_id`: Identifier for the route being traced
39//! - `step_id`: Unique identifier for this specific step in the route
40//! - `step_index`: Sequential index of this step within the route
41//! - `timestamp`: When the step was executed (Unix timestamp)
42//! - `duration_ms`: How long the step took to execute in milliseconds
43//! - `status`: The status of the step execution (e.g., "success", "error")
44//!
45//! ### Detail Levels
46//!
47//! The tracer supports three levels of detail:
48//!
49//! - **Minimal**: Includes only the base fields listed above
50//! - **Medium**: Includes the base fields plus:
51//!   - `headers_count`: Number of message headers
52//!   - `body_type`: Type of the message body
53//!   - `has_error`: Whether the message contains an error
54//!   - `output_body_type`: Type of the output body after processing
55//! - **Full**: Includes all fields from Minimal and Medium plus:
56//!   - Up to 3 message headers (`header_0`, `header_1`, `header_2`)
57//!
58//! //! Configuration types for the Tracer EIP live in `camel-core` rather than `camel-config`
59//! //! to avoid a circular dependency — `camel-config` depends on `camel-core`.
60//!
61pub mod context;
62pub(crate) mod hot_reload;
63pub mod lifecycle;
64pub(crate) mod shared;
65pub mod step;
66
67pub mod route {
68    pub use crate::lifecycle::adapters::route_compiler::{
69        compose_pipeline, compose_pipeline_with_contracts, compose_traced_pipeline,
70    };
71    pub use crate::lifecycle::adapters::route_types::Route;
72    pub use crate::lifecycle::application::route_definition::*;
73    pub use crate::lifecycle::domain::route::RouteSpec;
74}
75
76pub mod route_controller {
77    pub use crate::lifecycle::adapters::route_controller::*;
78}
79
80pub mod supervising_route_controller {
81    pub use crate::lifecycle::adapters::controller_actor::spawn_supervision_task;
82}
83
84pub mod reload_watcher {
85    pub use crate::hot_reload::adapters::reload_watcher::*;
86}
87
88pub use crate::hot_reload::adapters::ReloadWatcher;
89pub use crate::hot_reload::{execute_reload_actions, FunctionReloadContext, ReloadAction, ReloadError};
90pub use crate::lifecycle::adapters::controller_actor::RouteControllerHandle;
91pub use crate::lifecycle::adapters::controller_actor::spawn_controller_actor;
92pub use crate::lifecycle::adapters::controller_actor::spawn_supervision_task;
93pub use crate::lifecycle::adapters::exchange_uow::ExchangeUoWLayer;
94pub use crate::lifecycle::adapters::redb_journal::{
95    JournalDurability, JournalEntry, JournalInspectFilter, RedbJournalOptions,
96    RedbRuntimeEventJournal,
97};
98pub use crate::lifecycle::adapters::route_controller::DefaultRouteController;
99pub use crate::lifecycle::adapters::route_types::Route;
100pub use crate::lifecycle::adapters::{
101    InMemoryCommandDedup, InMemoryEventPublisher, InMemoryProjectionStore, InMemoryRouteRepository,
102    InMemoryRuntimeStore, RuntimeExecutionAdapter,
103};
104pub use crate::lifecycle::application::runtime_bus::RuntimeBus;
105pub use crate::lifecycle::application::{BuilderStep, RouteDefinition};
106pub use crate::lifecycle::domain::{
107    LanguageRegistryError, RouteLifecycleCommand, RouteRuntimeAggregate, RouteRuntimeState,
108    RuntimeEvent,
109};
110pub use crate::lifecycle::ports::{
111    CommandDedupPort, EventPublisherPort, ProjectionStorePort, RouteRepositoryPort,
112    RouteStatusProjection, RuntimeEventJournalPort, RuntimeExecutionPort, RuntimeUnitOfWorkPort,
113};
114pub use crate::shared::components::domain::Registry;
115pub use crate::shared::observability::adapters::TracingProcessor;
116pub use crate::shared::observability::domain::{
117    DetailLevel, FileOutput, OutputFormat, StdoutOutput, TracerConfig, TracerOutputs,
118};
119pub use context::CamelContext;
120
121// Re-export route controller types from camel-api (they live there to avoid cyclic dependencies).
122pub use camel_api::CamelError;
123pub use camel_api::{RouteAction, RouteController, RouteStatus};
camel_core/lib.rs

camel_core/
lib.rs
