Java NDC類代碼示例

import org.apache.log4j.NDC; //導入依賴的package包/類
@Test
public void testNDC() throws Exception
{
    initialize("TestJsonLayout/default.properties");

    NDC.push("frist");  // misspelling intentional
    NDC.push("second");

    logger.debug(TEST_MESSAGE);

    NDC.clear();

    captureLoggingOutput();
    assertCommonElements(TEST_MESSAGE);
    DomAsserts.assertEquals("ndc", "frist second", dom, "/data/ndc");
}
 

import org.apache.log4j.NDC; //導入依賴的package包/類
@Override
public final void run()
{
	try
	{
		NDC.inherit(loggingContext);
		CurrentUser.setUserState(callingThreadsAuthentication);
		CurrentInstitution.set(callingThreadsInstitution);
		doRun();
	}
	finally
	{
		CurrentInstitution.remove();
		CurrentUser.setUserState(null);
		NDC.remove();
	}
}
 

import org.apache.log4j.NDC; //導入依賴的package包/類
private int ndcPush() {
	int count = 0;
	try {
		UserContext user = getUser();
		if (user != null) {
			NDC.push("uid:" + user.getTrueExternalUserId()); count++;
			if (user.getCurrentAuthority() != null) {
				NDC.push("role:" + user.getCurrentAuthority().getRole()); count++;
				Long sessionId = user.getCurrentAcademicSessionId();
				if (sessionId != null) {
					NDC.push("sid:" + sessionId); count++;
				}
			}
		}
	} catch (Exception e) {}
	return count;
}
 

import org.apache.log4j.NDC; //導入依賴的package包/類
void bubbleSort() {
   LOG.info( "Entered the sort method.");

   for(int i = intArray.length -1; i >= 0  ; i--) {
     NDC.push("i=" + i);
     OUTER.debug("in outer loop.");
     for(int j = 0; j < i; j++) {
NDC.push("j=" + j);
// It is poor practice to ship code with log staments in tight loops.
// We do it anyway in this example.
INNER.debug( "in inner loop.");
        if(intArray[j] > intArray[j+1])
   swap(j, j+1);
NDC.pop();
     }
     NDC.pop();
   }
 }
 

import org.apache.log4j.NDC; //導入依賴的package包/類
/**
   * 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());
}
 

import org.apache.log4j.NDC; //導入依賴的package包/類
/**
 *  The pattern on the server side: %5p %x %X{key1}%X{key4} [%t] %c{1} - %m%n 
 *  meaning that we are testing NDC, MDC and localization functionality across 
 *  the wire.  
*/
public void test4() throws Exception {
  socketAppender = new SocketAppender("localhost", PORT);
  socketAppender.setLocationInfo(true);
  rootLogger.addAppender(socketAppender);

  NDC.push("some");
  common("T4", "key4", "MDC-TEST4");
  NDC.pop();
  delay(1);
  //
  //  These tests check MDC operation which
  //    requires JDK 1.2 or later
  if(!System.getProperty("java.version").startsWith("1.1.")) {
  
      ControlFilter cf = new ControlFilter(new String[]{PAT4, EXCEPTION1, 
				           EXCEPTION2, EXCEPTION3, EXCEPTION4, EXCEPTION5});
      Transformer.transform(
        TEMP, FILTERED,
        new Filter[] { cf, new LineNumberFilter(), 
            new JunitTestRunnerFilter(),
            new SunReflectFilter() });

      assertTrue(Compare.compare(FILTERED, "witness/socketServer.4"));
  }
}
 

import org.apache.log4j.NDC; //導入依賴的package包/類
/**
 * The pattern on the server side: %5p %x %X{hostID}${key7} [%t] %c{1} - %m%n 
 *
 * This test checks whether server side MDC works.
 */
public void test8() throws Exception {
  socketAppender = new SocketAppender("localhost", PORT);
  socketAppender.setLocationInfo(true);
  rootLogger.addAppender(socketAppender);

  NDC.push("some8");
  common("T8", "key8", "MDC-TEST8");
  NDC.pop();
  delay(2);
  //
  //  These tests check MDC operation which
  //    requires JDK 1.2 or later
  if(!System.getProperty("java.version").startsWith("1.1.")) {
      ControlFilter cf = new ControlFilter(new String[]{PAT8, EXCEPTION1, 
				           EXCEPTION2, EXCEPTION3, EXCEPTION4, EXCEPTION5});
  
      Transformer.transform(
        TEMP, FILTERED,
        new Filter[] { cf, new LineNumberFilter(), 
            new JunitTestRunnerFilter(),
            new SunReflectFilter() });
      assertTrue(Compare.compare(FILTERED, "witness/socketServer.8"));
  }
}
 

import org.apache.log4j.NDC; //導入依賴的package包/類
protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException
{
    count_++;
    String ndcName = getClass().getName();
    ndcName = ndcName.substring(ndcName.lastIndexOf('.')+1);
    NDC.push(ndcName);
    NDC.push("call-" + count_);
    logger_.info("begin onService");
    try
    {
        onService(req, resp);
    }
    catch (Exception exc)
    {
        lastException = exc;
        resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
    }
    finally
    {
        logger_.info("end onService");
        NDC.pop();
        NDC.pop();
    }
}
 

import org.apache.log4j.NDC; //導入依賴的package包/類
public void run() {
    NDC.push("main");

    try {
        log.info("starting up daemon");
        isStarted = true;
        //noinspection InfiniteLoopStatement
        while (!ss.isClosed()) {
            try {
                final Socket socket = ss.accept();
                socket.setSoTimeout(60000);
                socket.setTcpNoDelay(true);
                log.info("received connection, running");
                executor.execute(new DaemonWorker(socket));
            } catch (IOException e) {
                log.warn("server socket error", e);
            }
        }
    } finally {
        NDC.pop();
    }
}
 

import org.apache.log4j.NDC; //導入依賴的package包/類
public UserDomainObject verifyUser(String login, String password) {
    NDC.push("verifyUser");
    try {
        UserDomainObject result = null;

        boolean userAuthenticates = externalizedImcmsAuthAndMapper.authenticate(login, password);
        UserDomainObject user = externalizedImcmsAuthAndMapper.getUser(login);
        if (null == user) {
            mainLog.info("->User '" + login + "' failed to log in: User not found.");
        } else if (!user.isActive()) {
            logUserDeactivated(user);
        } else if (!userAuthenticates) {
            mainLog.info("->User '" + login + "' failed to log in: Wrong password.");
        } else {
            result = user;
            logUserLoggedIn(user);
        }
        return result;
    } finally {
        NDC.pop();
    }
}
 

import org.apache.log4j.NDC; //導入依賴的package包/類
/**
 * @return {@code true} if the object contains just the date, false otherwise.
 */
private boolean isDateOnly(EventDateTime source) {
    
    NDC.push("isDateOnly");
    
    try {

        if (source.getDate() != null && source.getDateTime() == null) {
            return true;
        }

        if (source.getDate() == null && source.getDateTime() != null) {
            return false;
        }
        
        logger.error("source: " + source);
        logger.error("date:   " + source.getDate());
        logger.error("time:   " + source.getDateTime());
        
        throw new IllegalArgumentException("API must have changed, both Date and DateTime are returned, need to revise the code");

    } finally {
        NDC.pop();
    }
}
 

import org.apache.log4j.NDC; //導入依賴的package包/類
@Override
public void networkFault(OneWireNetworkEvent e, String message) {
    
    NDC.push("networkFault");
    
    try {
        
        // This is an event pertinent to everyone
        
        consume(new DataSample<Double>(
                System.currentTimeMillis(), type + getAddress(), type + getAddress(),
                null, new OneWireIOException(message)));

    } finally {
        NDC.pop();
    }
}
 

import org.apache.log4j.NDC; //導入依賴的package包/類
/**
 * Make sure the signal given to {@link #consume(DataSample)} is sane.
 * 
 * @param signal Signal to check.
 */
private void check(DataSample<Double> signal) {
    
    NDC.push("check");

    try {

        if (signal == null) {
            throw new IllegalArgumentException("signal can't be null");
        }

        if (signal.isError()) {
            
            logger.error("Should not have propagated all the way here", signal.error);
            throw new IllegalArgumentException("Error signal should have been handled by zone controller");
        }
        
        if (signal.sample < 0.0) {
            
            throw new IllegalArgumentException("Signal must be non-negative, received " + signal.sample);
        }
        
    } finally {
        NDC.pop();
    }
}
 

import org.apache.log4j.NDC; //導入依賴的package包/類
/**
 * {@inheritDoc}
 */
public void consume(DataSample<ProcessControllerStatus> signal) {
    
    // Let them consume the common process controller signal components
    super.consume(signal);
    
    // And now let's take care of PID specific components
    
    NDC.push("consume.pid");
    
    try {
        
        // This is a bit dangerous, but let's see how exactly dangerous 
        PidControllerStatus pidStatus = (PidControllerStatus) signal.sample; 
        
        long timestamp = signal.timestamp;
        String sourceName = signal.sourceName;
        
        consume(timestamp, sourceName + ".p", pidStatus.p);
        consume(timestamp, sourceName + ".i", pidStatus.i);
        consume(timestamp, sourceName + ".d", pidStatus.d);
        
    } finally {
        NDC.pop();
    }
}
 

import org.apache.log4j.NDC; //導入依賴的package包/類
/**
 * Load the configuration already present in the jar file.
 * 
 * With some luck, all objects instantiated here will be garbage collected
 * pretty soon and won't matter.
 * 
 * If this bothers you, remove the method invocation and recompile.
 * 
 * @see #CF_EMBEDDED
 */
private void loadSampleConfiguration() {

    NDC.push("loadSampleConfiguration");
    
    try {
        
        // We don't need it for anything other than loading a sample,
        // hence local scope.
        ApplicationContext applicationContext = new ClassPathXmlApplicationContext(new String[] { CF_EMBEDDED });

        // This class is the root of the instantiation hierarchy -
        // if it can be instantiated, then everything else is fine
        @SuppressWarnings("unused")
        DamperController dc = (DamperController) applicationContext.getBean("damper_controller-sample1");

    } catch (NoSuchBeanDefinitionException ex) {

        logger.debug("Oh, they found and deleted the sample configuration! Good.");
        
    } finally {
        NDC.pop();
    }
}