Vertx上实现IOC的问题

问题由来：

想在Vertx中实现IOC容器，已定义@Inject,@Component注解

第二种方式:

public static void secondIOC () throws Exception {
    Class<?> controllerClass = Class.forName("com.andaren.interfaces.testInject.HandlerControllerTest");
    Object controllerObj = searchInjectClass(controllerClass);
    controllerClass.getDeclaredMethods()[0].invoke(controllerObj);
}
/**
 * IOC尝试：
 *  第二个版本：
 *      遍历每个需要注入的field，生成对应域的对象
 * @param clazz
 * @return
 * @throws Exception
 */
public static Object searchInjectClass (Class<?> clazz) throws Exception {
    // analysis field
    Field[] fields = clazz.getDeclaredFields();
    // generate the field instance
    Object clazzInstance = clazz.newInstance();
    // go through all fields
    for (Field f : fields) {
        Inject injectedField = f.getAnnotation(Inject.class);
        if (injectedField != null) {
            Class<?> fieldType = f.getType();
            Object fieldObj = searchInjectClass(fieldType);
            f.setAccessible(true);
            f.set(clazzInstance, fieldObj);
            continue;
        } else {
            continue;
        }
    }
    return clazzInstance;
}

第一种方式

/**
 * IOC简单尝试
 *  第一个版本：
 *      private 反射可以跨过域访问控制权限给域赋值
 *
 * @throws Exception
 */
public static void simpleFindMethod () throws Exception {
    Class<?> getServiceClass = Class.forName("com.andaren.interfaces.testInject.GetService");
    Object getServiceObject = getServiceClass.newInstance();
    Field[] fields = getServiceClass.getDeclaredFields();
    for (Field f : fields) {
        Inject inject = f.getAnnotation(Inject.class);
        if (inject != null) {
            System.out.println("Find the inject field");
            AService service = new AService();
            f.setAccessible(true);
            f.set(getServiceObject, service);
        }
    }
    Method m = getServiceClass.getDeclaredMethods()[0];
    m.invoke(getServiceObject, null);
    System.out.println("over");
}

将第二种方法，在main中循环一百次，
代码如下：

        Long startTime = System.currentTimeMillis();
        for (int i = 0; i < 100 ; i++) {
//            AService aService = new AService();
//            GetService getService = new GetService();
//            getService.setaService(aService);
//            HandlerControllerTest test = new HandlerControllerTest();
//            test.setGetService(getService);
//            test.testInject();
            secondIOC();
        }
        Long endTime = System.currentTimeMillis();
        System.out.println("Cost Time ：" + (endTime - startTime));
        System.exit(0);

run main方法第三次的时候抛出异常：

Connected to the target VM, address: '127.0.0.1:64127', transport: 'socket'
Exception in thread "main" java.lang.IllegalArgumentException: wrong number of arguments
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.andaren.interfaces.handler.DispatherHandler.secondIOC(DispatherHandler.java:413)
at com.andaren.interfaces.handler.DispatherHandler.main(DispatherHandler.java:402)
Disconnected from the target VM, address: '127.0.0.1:64127', transport: 'socket'


Process finished with exit code 1

很奇怪，前两次都能统计到时间在20ms之内，第三次总是报参数异常…

为什么呢？

待解决.

有时报这个异常

ERROR: JDWP Unable to get JNI 1.2 environment, jvm->GetEnv() return code = -2
JDWP exit error AGENT_ERROR_NO_JNI_ENV(183):  [util.c:840]

越来越奇怪