如何在 Tapestry 中使用 OSGi 服务

Question

我的 Tapestry Web 应用程序为某些数据集提供了完整的 CRUD 功能。 到目前为止，我一直在使用模拟来开发和测试它。

但是，我现在需要用 OSGi 服务（使用 Felix 运行）替换该模拟。

我的主要问题/问题是：

1. 我是否需要将 OSGi 服务注入到我的 Tapestry 应用程序中，如果需要，该怎么做？
2. 假设它是注入的，有没有关于如何使用它的实践？我应该调用这些方法或类似的任何特殊方式吗？
3. 在调用我需要的方法后，我是否需要对它做一些事情，还是自动完成？
4. 我需要担心HttpService吗（我看了一些关于它的抱怨，但不太明白）

为了给你提供一些背景信息，这就是我现在的做法

public class MyPage {
    ...
    @Inject
    private MyDao dao;
    ...
    @Property
    private List<Entry> entries;
    ...
    void onPrepareForRender() {
        ...
        this.entries = this.dao.getAll()
        ...
    }
    ...
}

我想要将MyDao dao 替换为提供相同功能的OSGi 服务，这样我就可以在onPrepareForRender 方法中使用它。

我可以放心地假设与服务关联的 OSGi 包已经在运行。

应用程序的其余部分作为 OSGi 应用程序制作。 我在 pom.xml 中添加/更改了一些东西（maven-bundle-plugin，按照http://www.javabeat.net/2011/11/writing-an-osgi-web-application/ 中的说明添加了一些清单条目）。

但是还是不行。

顺便说一句，我正在尝试将我的 WAR 转换为 WAB。

提前谢谢你:)

编辑：从 WAR 转换和部署到 WAB 时出现问题

当我将我的网络应用程序打包为 war 时，一切正常。但是，当我将其打包为 bundle 并尝试将其部署到 GlassFish 中时，我收到以下错误消息：

部署时出错：没有安装容器 能够处理这个应用程序管理战争。请参阅 server.log 了解更多详情。

当我转到 server.log 时，它是这样写的：

[#|2013-08-27T17:11:57.600+0200|INFO|glassfish3.1.2|org.glassfish.admingui|_ThreadID=28;_ThreadName=Thread-2;|uploadFileName=admin-war-2.01-SNAPSHOT.jar|#]

[#|2013-08-27T17:11:57.920+0200|WARNING|glassfish3.1.2|javax.enterprise.system.tools.deployment.com.sun.enterprise.deploy.shared|_ThreadID=29;_ThreadName=Thread-2;|DPL8031: Ignoring WEB-INF/ because the containing archive C:\glassfish3\glassfish\domains\domain1\applications\admin-war recorded it as a pre-existing stale file|#]

[#|2013-08-27T17:11:57.939+0200|WARNING|glassfish3.1.2|javax.enterprise.system.tools.deployment.com.sun.enterprise.deploy.shared|_ThreadID=33;_ThreadName=Thread-2;|DPL8031: Ignoring WEB-INF/ because the containing archive C:\glassfish3\glassfish\domains\domain1\applications\admin-war recorded it as a pre-existing stale file|#]

[#|2013-08-27T17:11:57.972+0200|WARNING|glassfish3.1.2|javax.enterprise.system.tools.deployment.com.sun.enterprise.deploy.shared|_ThreadID=29;_ThreadName=Thread-2;|DPL8031: Ignoring WEB-INF/ because the containing archive C:\glassfish3\glassfish\domains\domain1\applications\admin-war recorded it as a pre-existing stale file|#]

[#|2013-08-27T17:11:57.973+0200|WARNING|glassfish3.1.2|javax.enterprise.system.tools.deployment.com.sun.enterprise.deploy.shared|_ThreadID=29;_ThreadName=Thread-2;|DPL8031: Ignoring WEB-INF/ because the containing archive C:\glassfish3\glassfish\domains\domain1\applications\admin-war recorded it as a pre-existing stale file|#]

[#|2013-08-27T17:11:57.974+0200|WARNING|glassfish3.1.2|javax.enterprise.system.tools.deployment.com.sun.enterprise.deploy.shared|_ThreadID=29;_ThreadName=Thread-2;|DPL8031: Ignoring WEB-INF/ because the containing archive C:\glassfish3\glassfish\domains\domain1\applications\admin-war recorded it as a pre-existing stale file|#]

[#|2013-08-27T17:11:57.990+0200|WARNING|glassfish3.1.2|javax.enterprise.system.tools.deployment.com.sun.enterprise.deploy.shared|_ThreadID=29;_ThreadName=Thread-2;|DPL8031: Ignoring WEB-INF/ because the containing archive C:\glassfish3\glassfish\domains\domain1\applications\admin-war recorded it as a pre-existing stale file|#]

[#|2013-08-27T17:11:57.991+0200|WARNING|glassfish3.1.2|javax.enterprise.system.tools.deployment.com.sun.enterprise.deploy.shared|_ThreadID=29;_ThreadName=Thread-2;|DPL8031: Ignoring WEB-INF/ because the containing archive C:\glassfish3\glassfish\domains\domain1\applications\admin-war recorded it as a pre-existing stale file|#]

[#|2013-08-27T17:11:58.006+0200|WARNING|glassfish3.1.2|javax.enterprise.system.tools.deployment.com.sun.enterprise.deploy.shared|_ThreadID=29;_ThreadName=Thread-2;|DPL8031: Ignoring WEB-INF/ because the containing archive C:\glassfish3\glassfish\domains\domain1\applications\admin-war recorded it as a pre-existing stale file|#]

[#|2013-08-27T17:11:58.008+0200|WARNING|glassfish3.1.2|javax.enterprise.system.tools.deployment.com.sun.enterprise.deploy.shared|_ThreadID=29;_ThreadName=Thread-2;|DPL8031: Ignoring WEB-INF/ because the containing archive C:\glassfish3\glassfish\domains\domain1\applications\admin-war recorded it as a pre-existing stale file|#]

[#|2013-08-27T17:11:58.008+0200|WARNING|glassfish3.1.2|javax.enterprise.system.tools.deployment.com.sun.enterprise.deploy.shared|_ThreadID=29;_ThreadName=Thread-2;|DPL8031: Ignoring WEB-INF/ because the containing archive C:\glassfish3\glassfish\domains\domain1\applications\admin-war recorded it as a pre-existing stale file|#]

[#|2013-08-27T17:11:58.024+0200|WARNING|glassfish3.1.2|javax.enterprise.system.tools.deployment.com.sun.enterprise.deploy.shared|_ThreadID=29;_ThreadName=Thread-2;|DPL8031: Ignoring WEB-INF/ because the containing archive C:\glassfish3\glassfish\domains\domain1\applications\admin-war recorded it as a pre-existing stale file|#]

[#|2013-08-27T17:11:58.025+0200|WARNING|glassfish3.1.2|javax.enterprise.system.tools.deployment.com.sun.enterprise.deploy.shared|_ThreadID=29;_ThreadName=Thread-2;|DPL8031: Ignoring WEB-INF/ because the containing archive C:\glassfish3\glassfish\domains\domain1\applications\admin-war recorded it as a pre-existing stale file|#]

[#|2013-08-27T17:11:58.026+0200|SEVERE|glassfish3.1.2|javax.enterprise.system.core.com.sun.enterprise.v3.server|_ThreadID=29;_ThreadName=Thread-2;|Module type not recognized for module C:\glassfish3\glassfish\domains\domain1\applications\admin-war|#]

[#|2013-08-27T17:11:58.026+0200|SEVERE|glassfish3.1.2|javax.enterprise.system.core.com.sun.enterprise.v3.server|_ThreadID=29;_ThreadName=Thread-2;|There is no installed container capable of handling this application admin-war|#]

[#|2013-08-27T17:11:58.087+0200|INFO|glassfish3.1.2|org.glassfish.admingui|_ThreadID=28;_ThreadName=Thread-2;|Exception Occurred :Error occurred during deployment: There is no installed container capable of handling this application admin-war. Please see server.log for more details.|#]

Answer 1

我对 OSGI 不太熟悉，但您需要在 AppModule 中使用 build* 方法来提供 DAO。在下面的示例中，我假设 OsgiBundle 是一种访问 OSGI 服务的方式，但我不知道实际的 OSGI 类是什么。

例如：

public class MyAppModule {
    public void contributeApplicationDefaults(MappedConfiguration<String, String> config) {
        config.add("osgi.path", "path/to/osgi.xml");
    }

    public OsgiBundle buildOsgiBundle(@Symbol("osgi.path") String osgiPath) {
        // lookup the OSGI bundle somehow
    }

    public MyDao buildMyDao(OsgiBundle osgiBundle) {
        return osgiBundle.getService(MyDao.class);
    }   

    public SomeOtherDao buildSomeOtherDao(OsgiBundle osgiBundle) {
        return osgiBundle.getService(SomeOtherDao.class);
    }   
}

如果您想要更深入的集成（即自动将所有 OSGI 服务发布为 Tapestry IOC 服务），请查看 TapestrySpringFilter，它将所有 Spring bean 发布为 Tapestry IOC 服务。