@Test
public void testIndependentSpaceLog4j() {
    LoggerRepository repo1 = new Hierarchy(new RootLogger((Level) Level.DEBUG));
    URL url1 = LogbackTest.class.getResource("/com/alipay/sofa/rpc/log/log4j/log-conf.xml");
    OptionConverter.selectAndConfigure(url1, null, repo1);
    Logger logger1 = repo1.getLogger("com.foo.Bar");
    Assert.assertNotNull(logger1);

    //log4j logger 2

    LoggerRepository repo2 = new Hierarchy(new RootLogger((Level) Level.DEBUG));
    URL url2 = LogbackTest.class.getResource("/com/alipay/sofa/rpc/log/log4j/log4j_b.xml");
    OptionConverter.selectAndConfigure(url2, null, repo2);
    Logger logger2 = repo1.getLogger("com.foo.Bar2");
    Assert.assertNotNull(logger2);

    Assert.assertNotSame(logger1, logger2);
}
 

@Test
public void testLocalProperties() throws NoSuchFieldException, IllegalAccessException {

    LoggerRepository repo2 = new Hierarchy(new RootLogger((Level) Level.DEBUG));
    URL url2 = LogbackTest.class.getResource("/com/alipay/sofa/rpc/log/log4j/log4j_b.xml");
    DOMConfigurator domConfigurator = new DOMConfigurator();

    Field field = DOMConfigurator.class.getDeclaredField("props");
    field.setAccessible(true);
    Properties props = new Properties();
    field.set(domConfigurator, props);
    props.put("hello", "defaultb");

    domConfigurator.doConfigure(url2, repo2);

    Logger logger2 = repo2.getLogger("com.foo.Bar3");
    Assert.assertTrue(logger2.getAllAppenders().hasMoreElements());

}
 

private void removeCachedLoggers() {
  ((Hierarchy) LogManager.getLoggerRepository()).clear();
}