Parallel Execution

Use Parallel for independent work that is safe to run concurrently.

import org.paramixel.api.action.Parallel;
import org.paramixel.api.action.Step;

Action spec = Parallel.builder("browser matrix")
        .parallelism(3)
        .child(Step.of("chrome", ctx -> runChrome()))
        .child(Step.of("firefox", ctx -> runFirefox()))
        .child(Step.of("webkit", ctx -> runWebkit()))
        .build();

Runner parallelism

paramixel.parallelism controls runner-wide parallel capacity. Parallel.builder(...).parallelism(n) controls a specific parallel action's child concurrency.

Best practices

• Share immutable data only.
• Keep external resources isolated per child.
• Avoid relying on completion order.
• Use @Paramixel.Priority only for discovery admission order, not as a synchronization mechanism.
• Keep cleanup in after actions or CleanUp utilities.