35. Multi-Threaded Parallel Execution & Cross-Browser Matrices

Thread Safety in Playwright Java

Playwright objects (Page, Locator, Context) are not thread-safe. Rule: Never share a single Page or BrowserContext across concurrent threads. Each parallel thread must have its own BrowserContext and Page.

public class ThreadLocalDriver {
    private static ThreadLocal<Page> pageThread = new ThreadLocal<>();
public static Page getPage() {
        return pageThread.get();
    }
public static void setPage(Page page) {
        pageThread.set(page);
    }
public static void removePage() {
        pageThread.remove();
    }
}