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Playwright

BrowserExecutionEngine represents a browser execution engine that can be used to perform actions on the browser in response to a user action. PlaywrightBrowserExecutionEngine is an implementation of a BrowserExecutionEngine that uses Playwright Java API for performing browser actions. BrowserUseTool executes browser actions using BrowserExecutionEngine, that can be useful for Browser-Use Agents. You can control your browser using natural language, something like:

  • open page 'https://docs.langchain4j.dev/', and summary the page text

Maven Dependency​

<dependency>
    <groupId>dev.langchain4j</groupId>
    <artifactId>langchain4j-community-browser-execution-engine-playwright</artifactId>
    <version>${latest version here}</version>
</dependency>
<dependency>
    <groupId>dev.langchain4j</groupId>
    <artifactId>langchain4j-community-tool-browser-use</artifactId>
    <version>${latest version here}</version>
</dependency>

APIs​

  • BrowserExecutionEngine
  • PlaywrightBrowserExecutionEngine
  • BrowserUseTool

Examples​

        Playwright playwright = Playwright.create();
        BrowserType.LaunchOptions options = new BrowserType.LaunchOptions()
                .setHeadless(false)
                .setChannel("chrome")
                .setChromiumSandbox(true)
                .setSlowMo(500);
        Browser browser = playwright.chromium().launch(options);

        Assistant assistant = AiServices.builder(Assistant.class)
                .chatModel(model)
                .tools(BrowserUseTool.from(PlaywrightBrowserExecutionEngine.builder().browser(browser).build()))
                .chatMemory(MessageWindowChatMemory.withMaxMessages(10))
                .build();

        String question = "open page 'https://docs.langchain4j.dev/', and summary the page text";
        System.out.println(assistant.chat(question));