Pax Exam 如何启动多个容器

Question

对于我正在进行的项目，我们有必要编写 PaxExam 集成测试，这些测试在多个 Karaf 容器上运行。

我们的想法是找到一种方法来扩展/配置 PaxExam 以启动一个 Karaf 容器（或更多）并在那里部署一系列捆绑包，然后启动测试 Karaf 容器，该容器随后将测试功能。

我们需要这个来验证性能测试和其他事情。

有人知道吗？这在 PaxExam 中真的可能吗？

Answer 1

在找到这篇有趣的文章后，我自己写了答案。

特别是查看使用 Karaf Shell 和 Karaf 中的分布式集成测试

部分

http://planet.jboss.org/post/advanced_integration_testing_with_pax_exam_karaf

这基本上是文章所说的：

首先你必须改变测试探针头，允许动态包

@ProbeBuilder
public TestProbeBuilder probeConfiguration(TestProbeBuilder probe) {
    probe.setHeader(Constants.DYNAMICIMPORT_PACKAGE, "*;status=provisional");
    return probe;
}

在此之后，本文建议使用以下能够在 Karaf shell 中执行命令的代码

@Inject 
CommandProcessor commandProcessor;

protected String executeCommands(final String ...commands) {
    String response;
    final ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
    final PrintStream printStream = new PrintStream(byteArrayOutputStream);
    final CommandSession commandSession = commandProcessor.createSession(System.in, printStream, System.err);
    FutureTask<string> commandFuture = new FutureTask<string>(
            new Callable<string>() {
                public String call() {
                    try {
                        for(String command:commands) {
                         System.err.println(command);
                         commandSession.execute(command);
                        }
                    } catch (Exception e) {
                        e.printStackTrace(System.err);
                    }
                    return byteArrayOutputStream.toString();
                }
            });

    try {
        executor.submit(commandFuture);
        response =  commandFuture.get(COMMAND_TIMEOUT, TimeUnit.MILLISECONDS);
    } catch (Exception e) {
        e.printStackTrace(System.err);
        response = "SHELL COMMAND TIMED OUT: ";
    }

    return response;
}

然后，剩下的就很简单了，你必须实现一个能够启动 Karaf 子实例的层

public void createInstances() {
    //Install broker feature that is provided by FuseESB
    executeCommands("admin:create --feature broker brokerChildInstance");
    //Install producer feature that provided by imaginary feature repo.
    executeCommands("admin:create --featureURL mvn:imaginary/repo/1.0/xml/features --feature producer producerChildInstance");
    //Install producer feature that provided by imaginary feature repo.
    executeCommands("admin:create --featureURL mvn:imaginary/repo/1.0/xml/features --feature consumer consumerChildInstance");

    //start child instances
    executeCommands("admin:start brokerChildInstance");
    executeCommands("admin:start producerChildInstance");
    executeCommands("admin:start consumerChildInstance");

    //You will need to destroy the child instances once you are done.
    //Using @After seems the right place to do that.
}