Is streaming working by default in ADK's A2A sample? #79

iamthanhn · 2025-05-21T08:07:35Z

iamthanhn
May 21, 2025

Hi, I'm someone who is not very familiar with Python and streaming, so I’d like to ask a basic question.

Currently, I’m using ADK to build an agent, and I'm integrating A2A into my ADK setup.

I’m a bit confused about whether the sample message/stream example actually uses streaming. From what I observe, it seems to wait until the entire response is complete before returning anything.

Do I have to explicitly configure streaming_mode for it to actually stream? For example, I saw this:

class A2ARunConfig(RunConfig):
    """Custom override of ADK RunConfig to smuggle extra data through the event loop."""

    model_config = ConfigDict(
        arbitrary_types_allowed=True,
    )
    current_task_updater: TaskUpdater
    streaming_mode: StreamingMode.SSE # 👉 Does this line enable streaming with A2A? Why is it missing in the example?

Does this line enable streaming with A2A? Why is it missing in the example?

Since my knowledge is limited, I’m not sure when or why I should use this. Any clarification or simple explanation would be greatly appreciated!

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Is streaming working by default in ADK's A2A sample? #79

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Is streaming working by default in ADK's A2A sample? #79

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iamthanhn May 21, 2025

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iamthanhn
May 21, 2025