Unit 10 · React safely to live events

Resume only the task that owns the event

You let input-required and terminal events resume only their identity-scoped owning continuation. Recorded envelopes make that boundary testable without a live server.

10 focused minutesNot started

Worked example

See the idea in context

AxEventRuntime.Target target = new AxEventRuntime.Target(
    "reindex-flow", invokeFlow)
    .mapInput((event, continuation) -> Map.of("taskId",
        continuation == null ? castMap(event.data()).get("taskId")
            : continuation.metadata.get("taskId")))
    .waitFor("mcp.task", "taskKey", Map.of("taskId", taskId));
AxEventRuntime runtime = new AxEventRuntime(List.of(
    new AxEventRoute("task-start", "wake",
        Map.of("types", List.of("app.task.started")),
        "reindex-flow", false, "strict", 0),
    new AxEventRoute("task-resume", "resume",
        Map.of("types", List.of("mcp.task.status")),
        "reindex-flow", false, "strict", 0)))
    .registerTarget(target);
runtime.start();

Run itIn your own project

// Gradle (build.gradle):
implementation 'dev.axllm:ax:22.0.4'
// Maven (pom.xml):
<dependency>
  <groupId>dev.axllm</groupId>
  <artifactId>ax</artifactId>
  <version>22.0.4</version>
</dependency>

import dev.axllm.ax.Ax;

var llm = Ax.ai("openai", Map.of("apiKey", System.getenv("OPENAI_API_KEY")));
var classify = Ax.ax("review:string -> sentiment:class \"positive, negative, neutral\"");

Set OPENAI_APIKEY in your environment before running provider-backed code.

In the ax repo

From a clone of the ax repo:

npm run example -- java src/examples/java/mcp/ResourceWakeAgentExample.java

Active practice

Show that you can use it

Answer 2 in a row to learn this · attempt 1

Keep exploring

See the idea in context

Show that you can use it

Source-backed follow-up