Java Logger.error方法代碼示例

import org.slf4j.Logger; //導入方法依賴的package包/類
/**
 * Convert the string representation of an OFInstructionMeter to
 * an OFInstructionMeter. The instruction will be set within the
 * OFFlowMod.Builder provided. Notice nothing is returned, but the
 * side effect is the addition of an instruction in the OFFlowMod.Builder.
 * @param fmb; The FMB in which to append the new instruction
 * @param instStr; The string to parse the instruction from
 * @param log
 */
public static void meterFromString(OFFlowMod.Builder fmb, String inst, Logger log) {
	if (inst == null || inst.isEmpty()) {
		return;
	}

	if (fmb.getVersion().compareTo(OFVersion.OF_13) < 0) {
		log.error("Goto Meter Instruction not supported in OpenFlow 1.0, 1.1, or 1.2");
		return;
	}

	OFInstructionMeter.Builder ib = OFFactories.getFactory(fmb.getVersion()).instructions().buildMeter();

	if (inst.startsWith("0x")) {
		ib.setMeterId(Long.valueOf(inst.replaceFirst("0x", ""), 16));
	} else {
		ib.setMeterId(Long.valueOf(inst));
	}		

	log.debug("Appending (Goto)Meter instruction: {}", ib.build());
	appendInstruction(fmb, ib.build());
	log.debug("All instructions after append: {}", fmb.getInstructions());
}
 

import org.slf4j.Logger; //導入方法依賴的package包/類
/**
 * Validates that the system is not using the horribly buggy Sun JAXP implementation.
 */
public static void validateNonSunJAXP() {
    Logger log = getLogger();
    String builderFactoryClass = DocumentBuilderFactory.newInstance().getClass().getName();
    log.debug("VM using JAXP parser {}", builderFactoryClass);

    if (builderFactoryClass.startsWith("com.sun")) {
        String errorMsg = "\n\n\nOpenSAML requires an xml parser that supports JAXP 1.3 and DOM3.\n"
                + "The JVM is currently configured to use the Sun XML parser, which is known\n"
                + "to be buggy and can not be used with OpenSAML.  Please endorse a functional\n"
                + "JAXP library(ies) such as Xerces and Xalan.  For instructions on how to endorse\n"
                + "a new parser see http://java.sun.com/j2se/1.5.0/docs/guide/standards/index.html\n\n\n";

        log.error(errorMsg);
        throw new Error(errorMsg);
    }
}
 

import org.slf4j.Logger; //導入方法依賴的package包/類
public ClassDetails(SourceType javaClassFile, String jarFileName, String packageName, boolean isUserDefined) {
	Logger LOGGER = LogFactory.INSTANCE.getLogger(ClassDetails.class);
	LOGGER.debug("Extracting methods from " + cName);

	try {
		this.javaDoc=getJavaDoc(javaClassFile);			
		intialize(javaClassFile, jarFileName, packageName, isUserDefined);
		for (IJavaElement iJavaElement : javaClassFile.getChildren()) {
			if (iJavaElement instanceof SourceMethod) {
				addMethodsToClass((IMethod) iJavaElement);
			}
		}
	} catch (JavaModelException e) {
		LOGGER.error("Error occurred while fetching methods from class" + cName);
	}
}
 

import org.slf4j.Logger; //導入方法依賴的package包/類
/**
 * Compute the Message Authentication Code (MAC) value over the supplied input.
 * 
 * It is up to the caller to ensure that the specified algorithm ID is consistent with the type of signing key
 * supplied.
 * 
 * @param signingKey the key with which to compute the MAC
 * @param jcaAlgorithmID the Java JCA algorithm ID to use
 * @param input the input over which to compute the MAC
 * @return the computed MAC value
 * @throws SecurityException thrown if the MAC computation results in an error
 */
public static byte[] signMAC(Key signingKey, String jcaAlgorithmID, byte[] input) throws SecurityException {
    Logger log = getLogger();
    log.debug("Computing MAC over input using key of type {} and JCA algorithm ID {}", signingKey.getAlgorithm(),
            jcaAlgorithmID);

    try {
        Mac mac = Mac.getInstance(jcaAlgorithmID);
        mac.init(signingKey);
        mac.update(input);
        byte[] rawMAC = mac.doFinal();
        log.debug("Computed MAC: {}", new String(Hex.encode(rawMAC)));
        return rawMAC;
    } catch (GeneralSecurityException e) {
        log.error("Error during MAC generation", e);
        throw new SecurityException("Error during MAC generation", e);
    }
}
 

import org.slf4j.Logger; //導入方法依賴的package包/類
/**
 * Signs a single XMLObject.
 * 
 * @param signature the signature to computer the signature on
 * @throws SignatureException thrown if there is an error computing the signature
 */
public static void signObject(Signature signature) throws SignatureException {
    Logger log = getLogger();
    try {
        XMLSignature xmlSignature = ((SignatureImpl) signature).getXMLSignature();

        if (xmlSignature == null) {
            log.error("Unable to compute signature, Signature XMLObject does not have the XMLSignature "
                    + "created during marshalling.");
            throw new SignatureException("XMLObject does not have an XMLSignature instance, unable to compute signature");
        }
        log.debug("Computing signature over XMLSignature object");
        xmlSignature.sign(SecurityHelper.extractSigningKey(signature.getSigningCredential()));
    } catch (XMLSecurityException e) {
        log.error("An error occured computing the digital signature", e);
        throw new SignatureException("Signature computation error", e);
    }
}
 

import org.slf4j.Logger; //導入方法依賴的package包/類
@Test
public void test_logging() {
	Logger logger = LoggerFactory.getLogger(LoggingTest.class);
	logger.info("info logging");
	try {
		new MyClient().getTheThings();
	} catch(Exception e) {
		logger.error("error logging with stack", e);
	}
}
 

import org.slf4j.Logger; //導入方法依賴的package包/類
public static void doLog(String s, LogLevel logLevel, Logger logger) {
    switch (logLevel) {
        case ERROR: {
            logger.error(s);
            break;
        }

        case WARN: {
            logger.warn(s);
            break;
        }

        case INFO: {
            logger.info(s);
            break;
        }

        case DEBUG: {
            logger.debug(s);
            break;
        }

        case TRACE: {
            logger.trace(s);
            break;
        }

        default: {
            logger.error(s);
            break;
        }
    }
}
 

import org.slf4j.Logger; //導入方法依賴的package包/類
/**
 * builds a user exception or returns the wrapped one. If the error is a system error, the error message is logged
 * to the given {@link Logger}.
 *
 * @param logger the logger to write to
 * @return user exception
 */
public UserException build(final Logger logger) {
  if (uex != null) {
    return uex;
  }

  boolean isSystemError = errorType == DrillPBError.ErrorType.SYSTEM;

  // make sure system errors use the root error message and display the root cause class name
  if (isSystemError) {
    message = ErrorHelper.getRootMessage(cause);
  }

  final UserException newException = new UserException(this);

  // since we just created a new exception, we should log it for later reference. If this is a system error, this is
  // an issue that the Drill admin should pay attention to and we should log as ERROR. However, if this is a user
  // mistake or data read issue, the system admin should not be concerned about these and thus we'll log this
  // as an INFO message.
  if (isSystemError) {
    logger.error(newException.getMessage(), newException);
  } else {
    logger.info("User Error Occurred", newException);
  }

  return newException;
}
 

import org.slf4j.Logger; //導入方法依賴的package包/類
private void setBandwidth(PhysicalPortCommandBuilder builder, Enum<?> attr) {
    Logger log = LoggerFactory.getLogger(VMEthernetPortBuilderFactory.class);
    String speed = renderer.getValue(attr);
    if (speed != null) {
        try {
            long bandwidth = Long.parseLong(speed);
            builder.setBandwidth(bandwidth);
        } catch (NumberFormatException e) {
            log.error("cannot parse speed:[" + speed + "]", e);
        }
    }
}
 

import org.slf4j.Logger; //導入方法依賴的package包/類
private void setBandwidth(PhysicalPortCommandBuilder builder, Enum<?> attr) {
    Logger log = LoggerFactory.getLogger(PhysicalPortBuilderFactory.class);
    String speed = renderer.getValue(attr);
    if (speed == null) {
        return;
    }
    try {
        long bandwidth = Long.parseLong(speed);
        builder.setBandwidth(bandwidth);
    } catch (NumberFormatException e) {
        log.error("cannot parse speed:[" + speed + "]", e);
    }
}
 

import org.slf4j.Logger; //導入方法依賴的package包/類
/**
 * Unmarshall a Document from a Reader.
 * 
 * @param parserPool the ParserPool instance to use
 * @param reader the Reader to unmarshall
 * @return the unmarshalled XMLObject
 * @throws XMLParserException if there is a problem parsing the input data
 * @throws UnmarshallingException if there is a problem unmarshalling the parsed DOM
 */
public static XMLObject unmarshallFromReader(ParserPool parserPool, Reader reader)
        throws XMLParserException, UnmarshallingException {
    Logger log = getLogger();
    log.debug("Parsing Reader into DOM document");
    

    Document messageDoc = parserPool.parse(reader);
    Element messageElem = messageDoc.getDocumentElement();

    if (log.isTraceEnabled()) {
        log.trace("Resultant DOM message was:");
        log.trace(XMLHelper.nodeToString(messageElem));
    }

    log.debug("Unmarshalling DOM parsed from Reader");
    Unmarshaller unmarshaller = Configuration.getUnmarshallerFactory().getUnmarshaller(messageElem);
    if (unmarshaller == null) {
        log.error("Unable to unmarshall Reader, no unmarshaller registered for element "
                + XMLHelper.getNodeQName(messageElem));
        throw new UnmarshallingException(
                "Unable to unmarshall Reader, no unmarshaller registered for element "
                        + XMLHelper.getNodeQName(messageElem));
    }

    XMLObject message = unmarshaller.unmarshall(messageElem);

    log.debug("Reader succesfully unmarshalled");
    return message;
}
 

import org.slf4j.Logger; //導入方法依賴的package包/類
/**
 * Convert the byte array representation of an IP address into a string.  Supports IPv4 and IPv6 addresses.
 * Supports optional subnet mask stored within the same byte array.  If the latter is present, 
 * output will be: "ipAddr/mask".
 * 
 * @param address IP address in byte array form (in network byte order)
 * @return IP address as a string, or null if can not be processed
 */
public static String addressToString(byte[] address) {
    Logger log = getLogger();
    if (isIPv4(address)) {
        return ipv4ToString(address);
    } else if (isIPv6(address)) {
        return ipv6ToString(address);
    } else {
        log.error("IP address byte array was an invalid length: {}", address.length);
        return null;
    }
}
 

import org.slf4j.Logger; //導入方法依賴的package包/類
public static void callShell(final String shellString, final Logger log) {
    Process process = null;
    try {
        String[] cmdArray = splitShellString(shellString);
        process = Runtime.getRuntime().exec(cmdArray);
        process.waitFor();
        log.info("CallShell: <{}> OK", shellString);
    } catch (Throwable e) {
        log.error("CallShell: readLine IOException, {}", shellString, e);
    } finally {
        if (null != process)
            process.destroy();
    }
}
 

import org.slf4j.Logger; //導入方法依賴的package包/類
public static void error(Logger logger,String format,Supplier<Object> supplier){
    if(logger.isErrorEnabled()){
        logger.error(format,supplier.get());
    }
}
 

import org.slf4j.Logger; //導入方法依賴的package包/類
/**
 * Convert the byte array representation of an IPv6 address into a string.
 * Supports optional subnet mask stored within the same byte array.  If the latter is present, 
 * output will be: "ipAddr/mask".
 * 
 * @param address IP address in byte array form (in network byte order)
 * @return IP address as a string, or null if can not be processed
 */
private static String ipv6ToString(byte[] address) {
    Logger log = getLogger();
    // This code was modeled after similar code in Sun's sun.security.x509.IPAddressName,
    // used by sun.security.x509.X509CertImpl.
    StringBuilder builder = new StringBuilder();
    byte[] ip = new byte[16];
    System.arraycopy(address, 0, ip, 0, 16);
    try {
        builder.append(InetAddress.getByAddress(ip).getHostAddress());
    } catch (UnknownHostException e) {
        // Thrown if address is illegal length.
        // Can't happen, we know that address is the right length.
        log.error("Unknown host exception processing IP address byte array: {}", e.getMessage());
        return null;
    }
    
    if(hasMask(address)) {
        log.error("IPv6 subnet masks are currently unsupported");
        return null;
        /*
        byte[] mask = new byte[16];
        for(int i = 16; i < 32; i++) {
            mask[i - 16] = address[i];
        }
        
        // TODO need to process bitmask array
        // to determine and validate subnet mask
        BitArray bitarray = new BitArray(128, mask);
        int j;
        for (j = 0; j < 128 && bitarray.get(j); j++);
        builder.append("/");
        builder.append(j).toString();
        for (; j < 128; j++) {
            if (bitarray.get(j)) {
                log.error("Invalid IPv6 subdomain: set bit " + j + " not contiguous");
                return null;
            }
        }
        */
    }
    return builder.toString();
}