Class RemoteA2AAgent

java.lang.Object

com.google.adk.agents.BaseAgent

com.google.adk.a2a.agent.RemoteA2AAgent

public class RemoteA2AAgent
extends BaseAgent

Agent that communicates with a remote A2A agent via an A2A client.

The remote agent can be specified directly by providing an AgentCard to the builder, or it can be resolved automatically using the provided A2A client.

Key responsibilities of this agent include:

• Agent card resolution and validation
• Converting ADK session history events into A2A requests (Message)
• Handling streaming and non-streaming responses from the A2A client
• Buffering and aggregating streamed response chunks into ADK Events
• Converting A2A client responses back into ADK format

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	RemoteA2AAgent.AgentCardResolutionError	Exception thrown when the agent card cannot be resolved.
static class	RemoteA2AAgent.Builder	Builder for RemoteA2AAgent.
static class	RemoteA2AAgent.TypeError	Exception thrown when a type error occurs.

Method Summary

Modifier and Type	Method	Description
static RemoteA2AAgent.Builder	builder()
protected io.reactivex.rxjava3.core.Flowable<Event>	runAsyncImpl(InvocationContext invocationContext)	Agent-specific asynchronous logic.
protected io.reactivex.rxjava3.core.Flowable<Event>	runLiveImpl(InvocationContext invocationContext)	Agent-specific synchronous logic.

Methods inherited from class BaseAgent

afterAgentCallback, beforeAgentCallback, canonicalAfterAgentCallbacks, canonicalBeforeAgentCallbacks, close, description, findAgent, findSubAgent, fromConfig, name, parentAgent, parentAgent, rootAgent, runAsync, runLive, subAgents

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

builder

public static RemoteA2AAgent.Builder builder()

runAsyncImpl

protected io.reactivex.rxjava3.core.Flowable<Event> runAsyncImpl(InvocationContext invocationContext)

Description copied from class: BaseAgent

Agent-specific asynchronous logic.

Specified by:

runAsyncImpl in class BaseAgent

Parameters:

invocationContext - Current invocation context.

Returns:

stream of agent-generated events.

runLiveImpl

protected io.reactivex.rxjava3.core.Flowable<Event> runLiveImpl(InvocationContext invocationContext)

Description copied from class: BaseAgent

Agent-specific synchronous logic.

Specified by:

runLiveImpl in class BaseAgent

Parameters:

invocationContext - Current invocation context.

Returns:

stream of agent-generated events.