title: Server. Default Agent Executor

A2A Node SDK - v0.1.0 / Modules / Server / DefaultAgentExecutor

Class: DefaultAgentExecutor

Server.DefaultAgentExecutor

Default implementation of the AgentExecutor interface

This class provides a basic implementation of the AgentExecutor interface that manages task lifecycle, publishes events, and handles errors. It uses a TaskManager for task persistence and a TaskEventManager for event publishing.

Example

// Create dependencies
const taskStore = new InMemoryTaskStore();
const taskManager = new TaskManager(taskStore);
const taskEventManager = new TaskEventManager();
 
// Create the executor
const executor = new DefaultAgentExecutor(taskManager, taskEventManager);
 
// Execute a task
await executor.execute(
  createRequestContext(task, 'agent-123'),
  new EventQueue()
);

Implements

• AgentExecutor

Table of contents

Constructors

• constructor

Methods

• cancel
• execute

Constructors

constructor

• new DefaultAgentExecutor(taskManager, taskEventManager): DefaultAgentExecutor

Creates a new DefaultAgentExecutor

Parameters

Returns

DefaultAgentExecutor

Methods

cancel

▸ cancel(context, eventQueue): Promise<void>

Cancel an ongoing task execution

Parameters

Returns

Promise<void>

Implementation of

AgentExecutor.cancel

execute

▸ execute(context, eventQueue): Promise<void>

Executes a task on behalf of an agent

This method handles the execution of a task, including updating its status, publishing events, and handling errors. It transitions the task from its current state to ‘working’ and then to ‘completed’ if successful.

Parameters

Returns

Promise<void>

Promise that resolves when execution is complete

Throws

Various task-related errors if execution fails

Implementation of

AgentExecutor.execute