Apache Felix File从deploy文件夹安装jar [英] Apache Felix File Install jar from deploy folder

问题描述

我正在尝试将Apache Felix File Install与Felix的嵌入式版本一起使用.基本思想很简单，我有一个jar应用程序文件，可以使用标准java -jar app.jar启动该应用程序，该应用程序将启动Apache Felix框架，然后查看hot deploy文件夹，以安装，更新和删除/在运行时从该文件夹中放置/更新/删除.

I am trying to use Apache Felix File Install with an embedded version of Felix. The basic idea is simple, I have a jar application file that can be launched using standard java -jar app.jar and the application will startup Apache Felix framework and then look in a hot deploy folder installing, updating and removing the OSGi bundles that are in/placed/updated/removed from that folder at runtime.

我目前已经设法创建了启动嵌入式Felix的功能，并且如果我通过BundleContext.installBundle()指定了捆绑包，则可以部署捆绑包，但是我无法从热文件夹中动态获取jar捆绑包.

I currently have managed to create the ability to startup the embedded Felix and I can deploy bundles if I specify them via BundleContext.installBundle() but I cant get the jar bundles to be dynamically harvested from the hot folder.

这是我目前拥有的:

public static void main(String[] args) throws Exception {

    System.setProperty("felix.fileinstall.noInitialDelay", "true");
    System.setProperty("felix.fileinstall.poll", "1000");
    System.setProperty("felix.fileinstall.dir", "./hot-deploy");

    System.out.println("Building OSGi Framework");

    FrameworkFactory frameworkFactory = ServiceLoader.load(FrameworkFactory.class).iterator().next();
    Map<String, String> config = new HashMap<>();

    // make sure the cache is cleaned
    config.put(Constants.FRAMEWORK_STORAGE_CLEAN, Constants.FRAMEWORK_STORAGE_CLEAN_ONFIRSTINIT);

    // more properties available at: http://felix.apache.org/documentation/subprojects/apache-felix-service-component-runtime.html
    config.put("ds.showtrace", "true");
    config.put("ds.showerrors", "true");

    Framework framework = frameworkFactory.newFramework(config);
    framework.start();

    // declarative services dependency is necessary, otherwise they won't be picked up!
    loadScrBundle(framework);

    BundleContext context = framework.getBundleContext();
    List<Bundle> installedBundles = new LinkedList<>();

    //installedBundles.add(context.installBundle("file:./Sandbox/osgiTest/module-a/target/module-a-1.0-SNAPSHOT.jar"));

    for (Bundle bundle : installedBundles) {
        if (bundle.getHeaders().get(Constants.FRAGMENT_HOST) == null) {
            bundle.start();
        }
    }

    try {
        framework.waitForStop(0);
    } finally {
        System.exit(0);
    }

}

private static void loadScrBundle(Framework framework) throws URISyntaxException, BundleException {
    URL url = Activator.class.getClassLoader().getResource("org/apache/felix/scr/ScrService.class");
    if (url == null) {
        throw new RuntimeException("Could not find the class org.apache.felix.scr.ScrService");
    }
    String jarPath = url.toURI().getSchemeSpecificPart().replaceAll("!.*", "");
    System.out.println("Found declarative services implementation: " + jarPath);
    framework.getBundleContext().installBundle(jarPath).start();
}

推荐答案

事实证明，felix.fileinstall本身是一个捆绑软件，必须在主机应用程序中启动才能查看目录.从最初的实施到开始工作，只需安装并启动fileinstall捆绑包:

Turns out that felix.fileinstall itself is a bundle that must be started in the host application before it can watch a directory. All that is required from my initial implementation to work is to install and start the fileinstall bundle:

installedBundles.add(context.installBundle("file:path/to/fileinstall.jar"));

这篇关于Apache Felix File从deploy文件夹安装jar的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！