Golem Configure Durability Rust

Configuring Agent Durability (Rust)

Durable Agents (Default)

By default, all Golem agents are durable:

• State persists across invocations, failures, and restarts
• Every side effect is recorded in an oplog (operation log)
• On failure, the agent is transparently recovered by replaying the oplog
• No special code needed — durability is automatic

A standard durable agent:

use golem_rust::{agent_definition, agent_implementation};

#[agent_definition]
pub trait CounterAgent {
    fn new(name: String) -> Self;
    fn increment(&mut self) -> u32;
    fn get_count(&self) -> u32;
}

struct CounterAgentImpl {
    name: String,
    count: u32,
}

#[agent_implementation]
impl CounterAgent for CounterAgentImpl {
    fn new(name: String) -> Self {
        Self { name, count: 0 }
    }

    fn increment(&mut self) -> u32 {
        self.count += 1;
        self.count
    }

    fn get_count(&self) -> u32 {
        self.count
    }
}