在使用 Gradle 和 BND 构建的 OSGi 环境中配置 pax-logging

发布于 2025-01-10 15:37:09 字数 2592 浏览 0 评论 0原文

我正在尝试通过 Pax Logging 让 Log4J2 工作，但在线文档重点关注 Log4J (v1)。我的项目是 Java，Gradle 以及针对 Equinox 环境的 OSGi 捆绑包的 BND 插件。

我正在使用 Gradle 6.8.3

我有一个 OSGi 包的 build.gradle 文件，该文件旨在使用以下方式向其他包公开日志记录功能：

implementation 'org.ops4j.pax.logging:pax-logging-api:2.1.0'
implementation 'org.ops4j.pax.logging:pax-logging-log4j2:2.1.0'

在我的 BND 文件中，我包含以下导入：

Import-Package: org.apache.logging.log4j;version="2.17.1";provider=paxlogging, org.apache.commons.logging;version="[1.1.1,2)";provider=paxlogging, org.apache.logging.log4j.core;version="2.17.1";provider=paxlogging

由于我的项目定义了文件附加程序，它不构成 Log4J2 API 的一部分，而是 Log4J2 Core，因此我从同一个包中导出以下内容，以使 Log4J2 Core 类能够在依赖于日志记录包的其他包中具有可见性

Export-Package: com.mycompany.loggingbundle, org.apache.logging.log4j, org.apache.logging.log4j.message, org.apache.logging.log4j.util, org.apache.logging.log4j.core;version="2.17.1", org.apache.logging.log4j.core.appender;version="2.17.1", org.apache.logging.log4j.core.filter;version="2.17.1", org.apache.logging.log4j.core.impl;version="2.17.1", org.apache.logging.log4j.spi;version="2.17.1"

：编译、构建和安装都很好。

在运行时，我遇到一个问题：

org.osgi.framework.BundleException: Could not resolve module: com.mycompany.otherbundle [1306]
  Unresolved requirement: Require-Bundle: com.mycompany.loggingbundle
    -> Bundle-SymbolicName: com.mycompany.loggingbundle; bundle-version="<hidden>"; singleton:="true"
       com.mycompany.loggingbundle [1311]
         Unresolved requirement: Import-Package: org.apache.logging.log4j.core; provider="paxlogging"; version="2.17.1"

    at org.eclipse.osgi.container.Module.start(Module.java:434)
    at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.incStartLevel(ModuleContainer.java:1582)
    at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.incStartLevel(ModuleContainer.java:1561)
    at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.doContainerStartLevel(ModuleContainer.java:1533)
    at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.dispatchEvent(ModuleContainer.java:1476)
    at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.dispatchEvent(ModuleContainer.java:1)
    at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
    at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:340)

希望一些 OSGi 专家知道我出了什么问题，因为使用 Pax Logging 的全部原因是为了避免创建 Log4J2 片段的需要，并为多捆绑环境提供更简单的配置。也许需要考虑一系列系统性的事情来解决这个问题？

原文

I am trying to get Log4J2 working via Pax Logging but online docs focus on Log4J (v1). My project is Java, Gradle with BND plugin for OSGi bundles aimed at the Equinox environment.

I am using Gradle 6.8.3

I have my build.gradle file for an OSGi bundle that aims to expose logging functionality to other bundles using:

implementation 'org.ops4j.pax.logging:pax-logging-api:2.1.0'
implementation 'org.ops4j.pax.logging:pax-logging-log4j2:2.1.0'

In my BND file, I include the following imports:

Import-Package: org.apache.logging.log4j;version="2.17.1";provider=paxlogging, org.apache.commons.logging;version="[1.1.1,2)";provider=paxlogging, org.apache.logging.log4j.core;version="2.17.1";provider=paxlogging

Since my project has file appenders defined, which don't form part of the Log4J2 API, but Log4J2 Core, I therefore export the following from the same bundle to enable Log4J2 Core classes to have visibility in other bundles that depend on the logging bundle:

Export-Package: com.mycompany.loggingbundle, org.apache.logging.log4j, org.apache.logging.log4j.message, org.apache.logging.log4j.util, org.apache.logging.log4j.core;version="2.17.1", org.apache.logging.log4j.core.appender;version="2.17.1", org.apache.logging.log4j.core.filter;version="2.17.1", org.apache.logging.log4j.core.impl;version="2.17.1", org.apache.logging.log4j.spi;version="2.17.1"

Everything compiles, builds and install fine.

At runtime, I have an issue:

org.osgi.framework.BundleException: Could not resolve module: com.mycompany.otherbundle [1306]
  Unresolved requirement: Require-Bundle: com.mycompany.loggingbundle
    -> Bundle-SymbolicName: com.mycompany.loggingbundle; bundle-version="<hidden>"; singleton:="true"
       com.mycompany.loggingbundle [1311]
         Unresolved requirement: Import-Package: org.apache.logging.log4j.core; provider="paxlogging"; version="2.17.1"

    at org.eclipse.osgi.container.Module.start(Module.java:434)
    at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.incStartLevel(ModuleContainer.java:1582)
    at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.incStartLevel(ModuleContainer.java:1561)
    at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.doContainerStartLevel(ModuleContainer.java:1533)
    at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.dispatchEvent(ModuleContainer.java:1476)
    at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.dispatchEvent(ModuleContainer.java:1)
    at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
    at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:340)

Hopefully some OSGi expert knows what I've got wrong because the whole reason to use Pax Logging was to avoid the need to create Log4J2 fragments and have an easier configuration for a multi-bundled environment. Perhaps there is a systematic series of things to look at to resolve this?

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