我有两个 IntelliJ 插件。PluginTwo 依赖于 PluginOne,所以 Two 在 One 之后启动。两个插件都依赖于第三个核心模块。
结构:
我想通过 PluginTwo 中的 Context-Class 访问 Dummy-Class。Context 类是 Core-Module 的一部分,并使用 PicoContainer 提供对 Dummy-Class 的访问。PluginOne 在启动时使用 PicoContainer 创建一个上下文。现在我想通过 PicoContainer 从 PluginTwo 访问 Dummy-Class。
我得到了这个错误:
2018-09-28 14:25:19,208 [ 12588] ERROR - roject.impl.ProjectManagerImpl - PluginTwoProjectComponent@94a5de2
java.lang.LinkageError: loader constraint violation: loader (instance of com/intellij/ide/plugins/cl/PluginClassLoader) previously initiated loading for a different type with name "Context"
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
at java.lang.ClassLoader.defineClass(ClassLoader.java:642)
at com.intellij.util.lang.UrlClassLoader._defineClass(UrlClassLoader.java:276)
at com.intellij.util.lang.UrlClassLoader.defineClass(UrlClassLoader.java:272)
at com.intellij.util.lang.UrlClassLoader._findClass(UrlClassLoader.java:241)
at com.intellij.ide.plugins.cl.PluginClassLoader.a(PluginClassLoader.java:142)
at com.intellij.ide.plugins.cl.PluginClassLoader.a(PluginClassLoader.java:74)
at com.intellij.ide.plugins.cl.PluginClassLoader.loadClass(PluginClassLoader.java:61)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at PluginTwoProjectComponent.projectOpened(PluginTwoProjectComponent.java:16)
...
PicoContainer 在 Context-Class 中创建:
private static Context instance;
private final MutablePicoContainer picoContainer;
public static synchronized Context getInstance() {
if (instance == null) {
instance = new Context();
}
return instance;
}
public Context() {
picoContainer = new DefaultPicoContainer();
picoContainer.addComponent(DummyClass.class);
}
public <T> T getComponent(Class<T> clazz) {
return picoContainer.getComponent(clazz);
}
PluginOneProjectComponent 获取 Context 的一个实例
public class PluginOneProjectComponent implements ProjectComponent {
private static Context context;
private Project project;
public PluginOneProjectComponent(Project project) {
this.project = project;
}
@Override
public void projectOpened() {
System.out.println("PluginOneProjectComponent started with project " + project.getName());
context = Context.getInstance();
DummyClass dummy = context.getComponent(DummyClass.class);
System.out.println("DummyText from PluginOne " + dummy.getText());
System.out.println("DummyNumber from PluginOne " + dummy.getNumber());
}
public static Context getContext() {
return context;
}
}
从 PluginTwo 我想使用 PluginOne 的 Context 来访问 DummyClass。但这不起作用。
public class PluginTwoProjectComponent implements ProjectComponent {
Project project;
public PluginTwoProjectComponent(Project project) {
this.project = project;
}
@Override
public void projectOpened() {
System.out.println("PluginTwoProjectComponent started with project " + project.getName());
Context context = PluginOneProjectComponent.getContext();
DummyClass dummy = context.getComponent(DummyClass.class);
System.out.println("DummyText from Plugin Two" + dummy.getText());
System.out.println("DummyNumber from Plugin Two" + dummy.getNumber());
}
}
所以只有输出。
PluginOneProjectComponent started with project HelloWorld
DummyText from PluginOne Some Text
DummyNumber from PluginOne 42
PluginTwoProjectComponent started with project HelloWorld
当我在调试器的上下文中调用 getComponent(DummyClass.class) 时,我只会得到 null 作为结果。
有人能帮我吗?有没有更好的方法从 PluginOne 访问我的 Context-Class?
我把这个小项目中的错误复现出来分享给大家。我只需要 PluginOne 的 PicoContainer 就可以在 PluginTwo 中使用它。完整的源代码在这里:https ://github.com/jafey/intellij-plugin-picocontainer-poc