org.apache.log4j.NDC#clear ( )源码实例Demo

/**
   * Tests CDATA element within NDC content.  See bug 37560.
   */
 public void testNDCWithCDATA() throws Exception {
     Logger logger = Logger.getLogger("com.example.bar");
     Level level = Level.INFO;
     String ndcMessage ="<envelope><faultstring><![CDATA[The EffectiveDate]]></faultstring><envelope>";
     NDC.push(ndcMessage);
     LoggingEvent event =
       new LoggingEvent(
         "com.example.bar", logger, level, "Hello, World", null);
     Layout layout = createLayout();
     String result = layout.format(event);
     NDC.clear();
     Element parsedResult = parse(result);
     NodeList ndcs = parsedResult.getElementsByTagName("log4j:NDC");
     assertEquals(1, ndcs.getLength());
     StringBuffer buf = new StringBuffer();
     for(Node child = ndcs.item(0).getFirstChild();
             child != null;
             child = child.getNextSibling()) {
         buf.append(child.getNodeValue());
     }
     assertEquals(ndcMessage, buf.toString());
}
 

/**
   * Clear MDC and NDC before test.
   */
public void setUp() {
    NDC.clear();
    if (MDC.getContext() != null) {
      MDC.getContext().clear();
    }
}
 

@Override
public final T call() throws Exception {
  NDC.inherit(ndcStack);
  try {
    return callInternal();
  } finally {
    NDC.clear();
  }
}
 

@Override
public final void run() {
  NDC.inherit(ndcStack);
  try {
    runInternal();
  } finally {
    NDC.clear();
  }
}
 

@BeforeEach
@AfterEach
void tearDown() {
    MDC.clear();
    NDC.clear();
}
 

public static void clear() {
	NDC.clear();
}