Java Logger類代碼示例

import org.jboss.logging.Logger; //導入依賴的package包/類
@Produces
@Singleton
private ApiClient apiClient(Tracer tracer) {

    String host = config.getValue(APIGATEWAY_URL, String.class);
    String port = config.getValue(APIGATEWAY_PORT, String.class);

    log.infof("API gateway expected at %s:%s", host, port);

    return HystrixFeign.builder()
            .client(new TracingClient(new ApacheHttpClient(HttpClientBuilder.create().build()), tracer))
            .logger(new feign.Logger.ErrorLogger()).logLevel(feign.Logger.Level.BASIC)
            .encoder(new JacksonEncoder())
            .decoder(new JacksonDecoder())
            .target(ApiClient.class, String.format("http://%s:%s", host, port),
                    (LRA lra) -> rx.Observable.empty());

}
 

import org.jboss.logging.Logger; //導入依賴的package包/類
/**
 * <p>
 * Provide a hook for lazy configuration of this <code>Digester</code>
 * instance.  The default implementation does nothing, but subclasses
 * can override as needed.
 * </p>
 *
 * <p>
 * <strong>Note</strong> This method may be called more than once.
 * Once only initialization code should be placed in {@link #initialize}
 * or the code should take responsibility by checking and setting the 
 * {@link #configured} flag.
 * </p>
 */
protected void configure() {

    // Do not configure more than once
    if (configured) {
        return;
    }

    log = Logger.getLogger("org.apache.commons.digester.Digester");
    saxLog = Logger.getLogger("org.apache.commons.digester.Digester.sax");

    // Perform lazy configuration as needed
    initialize(); // call hook method for subclasses that want to be initialized once only
    // Nothing else required by default

    // Set the configuration flag to avoid repeating
    configured = true;

}
 

import org.jboss.logging.Logger; //導入依賴的package包/類
public InputSource resolveEntity(String publicId, String systemId)
        throws SAXException {
    for (int i = 0; i < Constants.CACHED_DTD_PUBLIC_IDS.length; i++) {
        String cachedDtdPublicId = Constants.CACHED_DTD_PUBLIC_IDS[i];
        if (cachedDtdPublicId.equals(publicId)) {
            String resourcePath = Constants.CACHED_DTD_RESOURCE_PATHS[i];
            InputStream input = this.getClass().getResourceAsStream(
                    resourcePath);
            if (input == null) {
                throw new SAXException(Localizer.getMessage(
                        "jsp.error.internal.filenotfound", resourcePath));
            }
            InputSource isrc = new InputSource(input);
            return isrc;
        }
    }
    Logger log = Logger.getLogger(MyEntityResolver.class);
    if (log.isDebugEnabled())
        log.debug("Resolve entity failed" + publicId + " " + systemId);
    log.error(Localizer.getMessage("jsp.error.parse.xml.invalidPublicId",
            publicId));
    return null;
}
 

import org.jboss.logging.Logger; //導入依賴的package包/類
@Test
public void testNothing() {
    Logger gouda = Logger.getLogger( "cheese.gouda" );

    gouda.info( "gouda info" );
    gouda.debug( "gouda debug");

    assertTrue( gouda.isTraceEnabled() );
    assertTrue( gouda.isDebugEnabled() );
    assertTrue( gouda.isInfoEnabled() );

    Logger cheddar = Logger.getLogger( "cheese.cheddar" );

    cheddar.info( "cheddar info" );
    cheddar.debug( "cheddar debug" );

    assertFalse( cheddar.isTraceEnabled() );
    assertFalse( cheddar.isDebugEnabled() );
    assertFalse( cheddar.isInfoEnabled() );
}
 

import org.jboss.logging.Logger; //導入依賴的package包/類
@Test
public void doLogging() throws FileNotFoundException {
    String message = "testing: " + UUID.randomUUID().toString();
    Logger logger = Logger.getLogger("br.org.sistemafieg.cliente");
    logger.info(message);
    assertTrue("File not found: " + logFile, new File(logFile).exists());

    BufferedReader reader = new BufferedReader(new FileReader(logFile));
    List<String> lines = reader.lines().collect(Collectors.toList());

    boolean found = false;

    for (String line : lines) {
        if (line.contains(message)) {
            found = true;
            break;
        }
    }

    assertTrue("Expected message " + message, found);


}
 

import org.jboss.logging.Logger; //導入依賴的package包/類
@Test
public void testNothing() {
    Logger gouda = Logger.getLogger( "cheese.gouda" );

    gouda.info( "gouda info" );
    gouda.debug( "gouda debug");

    assertFalse( gouda.isTraceEnabled() );
    assertFalse( gouda.isDebugEnabled() );
    assertTrue( gouda.isInfoEnabled() );

    Logger cheddar = Logger.getLogger( "cheese.cheddar" );

    cheddar.info( "cheddar info" );
    cheddar.debug( "cheddar debug" );

    assertFalse( cheddar.isTraceEnabled() );
    assertFalse( cheddar.isDebugEnabled() );
    assertTrue( cheddar.isInfoEnabled() );
}
 

import org.jboss.logging.Logger; //導入依賴的package包/類
@Override
public Object getLevel() {
    if (this.logger.isEnabled(Logger.Level.TRACE)) {
        return "TRACE";
    }
    if (this.logger.isEnabled(Logger.Level.DEBUG)) {
        return "DEBUG";
    }
    if (this.logger.isEnabled(Logger.Level.INFO)) {
        return "INFO";
    }
    if (this.logger.isEnabled(Logger.Level.WARN)) {
        return "WARN";
    }
    if (this.logger.isEnabled(Logger.Level.ERROR)) {
        return "ERROR";
    }

    return "UNKNOWN";
}
 

import org.jboss.logging.Logger; //導入依賴的package包/類
public static void messageChunkSent() {
   messageChunkCount++;

   try {
      if (messageChunkCount == 10) {
         liveServer.fail(true);

         System.err.println("activating");
         if (!backupServer.waitForActivation(1, TimeUnit.MINUTES)) {
            Logger.getLogger(LargeMessageOverReplicationTest.class).warn("Can't failover server");
         }
      }
   } catch (Exception e) {
      e.printStackTrace();
   }
}
 

import org.jboss.logging.Logger; //導入依賴的package包/類
public static void main(String[] args) throws IOException {

        // 2. Specify the alternate log manager as a system property
        System.setProperty("java.util.logging.manager", "org.jboss.logmanager.LogManager");
        
        // 3. Configure Programmtically
        String logLevel = "TRACE";
        String logFile = "target/jboss-logging-programmtically.log";
        PropertyConfigurator configurator = new PropertyConfigurator();
        configurator.configure(createLogManagerConfig(logLevel, logFile));
        
        // 4. Initialize a Logger
        Logger logger = Logger.getLogger(JBossLoggingExample.class);
        
        // 5. logging the message
        logger.trace("TRACE Message");
        logger.debug("DEBUG Message");
        logger.info("INFO Message");
        logger.warn("WARN Message");
        logger.error("Error Message");
        logger.fatal("FATAL Message");
        
    }
 

import org.jboss.logging.Logger; //導入依賴的package包/類
@Test
public void testConstructedInterfaceName() throws Exception
{
   W3CEndpointReferenceBuilder builder = new W3CEndpointReferenceBuilder(); 
   builder = builder.address(URL);
   builder = builder.serviceName(SERVICE_QNAME);
   builder = builder.endpointName(PORT_QNAME);
   builder = builder.interfaceName(PORT_TYPE_QNAME);
   builder = builder.wsdlDocumentLocation(WSDL_URL);
   Element element = DOMUtils.parse(XML_REF_PARAM1);
   builder = builder.referenceParameter(element);
   element = DOMUtils.parse(XML_REF_PARAM2);
   builder = builder.referenceParameter(element);
   W3CEndpointReference epr = builder.build();
   DOMResult dr = new DOMResult(); 
   epr.writeTo(dr);
   Node endpointReferenceElement = dr.getNode();
   Logger.getLogger(this.getClass()).info(DOMUtils.node2String(endpointReferenceElement));
   assertMetaData(endpointReferenceElement);
   assertRefParam(endpointReferenceElement, PARAM1_QNAME, "Hello");
   assertRefParam(endpointReferenceElement, PARAM2_QNAME, "World");
}
 

import org.jboss.logging.Logger; //導入依賴的package包/類
/**
 * Return the Logger with which this Container is associated.  If there is
 * no associated Logger, return the Logger associated with our parent
 * Container (if any); otherwise return <code>null</code>.
 */
public Logger getLogger() {

    if (logger != null)
        return (logger);
    logger = Logger.getLogger(logName());
    return (logger);

}
 

import org.jboss.logging.Logger; //導入依賴的package包/類
public void warning(SAXParseException ex) throws SAXException {
    Logger log = Logger.getLogger(MyErrorHandler.class);
    if (log.isDebugEnabled())
        log.debug("ParserUtils: warning ", ex);
    // We ignore warnings
}
 

import org.jboss.logging.Logger; //導入依賴的package包/類
private void handleCustomLog(HttpServerExchange exchange, Throwable t, Logger.Level level, Logger.Level stackTraceLevel, String category) {
    BasicLogger logger = UndertowLogger.REQUEST_LOGGER;
    if (!category.isEmpty()) {
        logger = Logger.getLogger(category);
    }
    boolean stackTrace = true;
    if (stackTraceLevel.ordinal() > level.ordinal()) {
        if (!logger.isEnabled(stackTraceLevel)) {
            stackTrace = false;
        }
    }
    if (stackTrace) {
        logger.logf(level, t, "Exception handling request to %s", exchange.getRequestURI());
    } else {
        logger.logf(level, "Exception handling request to %s: %s", exchange.getRequestURI(), t.getMessage());
    }
}
 

import org.jboss.logging.Logger; //導入依賴的package包/類
public static Response onException(Exception e, Logger log) {
    if (e instanceof IllegalArgumentException) {
        return badRequest(e.getMessage());
    }
    if (null != e.getCause() && e.getCause() instanceof IllegalArgumentException) {
        return badRequest(e.getCause().getMessage());
    }
    if (null != log) {
        log.debug(e.getMessage(), e);
    }
    return internalError(e.getMessage());
}
 

import org.jboss.logging.Logger; //導入依賴的package包/類
@Test
public void testCustomCategory() {
    Logger logger = Logger.getLogger("custom.category");

    logger.info("gouda info");
    logger.debug("gouda debug");
    logger.trace("gouda trace");

    assertFalse(logger.isTraceEnabled());
    assertTrue(logger.isDebugEnabled());
    assertTrue(logger.isInfoEnabled());
}