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@jainnancy
Last active Aug 20, 2018
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Adapter Design Pattern
package com.knoldus
import org.apache.log4j.BasicConfigurator
object Client extends App {
BasicConfigurator.configure()
val logger : LoggerHelper = LoggerAdapter.getLogger(this.getClass.getName)
logger.info("Log Contains IP address: 127.0.0.1")
logger.debug("UserName: jainnancy trying to sign in")
logger.error("Password: abxyz is wrong ")
}
package com.knoldus
object LoggerAdapter extends LoggerHelper {
var scrambledLogger : ScrambledLogger = _
override def info(msg : String) = scrambledLogger.scrambledInfo(msg)
override def debug(msg : String) = scrambledLogger.scrambledDebug(msg)
override def error(msg : String) = scrambledLogger.scrambledError(msg)
def getLogger(s : String) : LoggerHelper =
{
scrambledLogger = new ScrambledLogger(s)
LoggerAdapter
}
}
package com.knoldus
import org.apache.log4j.BasicConfigurator
trait LoggerHelper {
def info(msg : String)
def debug(msg : String)
def error(msg : String)
}
package com.knoldus
import org.apache.log4j.Logger
class ScrambledLogger(name : String)
{
private val regex = "\\b\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\b"
private val password = "Password: "
private val userName = "UserName: "
private val logger = Logger.getLogger(name)
def scrambledInfo(message : String) = logger.info(scramble(message))
def scrambledDebug(message : String) = logger.debug(scramble(message))
def scrambledError(message : String) = logger.error(scramble(message))
private def scramble(message : String) = scrambleUsername(scrambleIp((scramblePassword(message))))
private def scrambleUsername(message : String) = {
if(message.contains(userName)) {
val index = message.indexOf(userName) + userName.length()
val textStartedPassword = message.substring(index)
message.substring(0, index) + "X" + textStartedPassword.substring(textStartedPassword.indexOf(" "))
}
else {
message
}
}
private def scrambleIp(message : String) = message.replaceAll(regex, "XXX.XXX.XXX.XXX")
private def scramblePassword(message : String) = {
if(message.contains(password)) {
val index = message.indexOf(password) + password.length()
val textStartedPassword = message.substring(index)
message.substring(0, index) + "X" + textStartedPassword.substring(textStartedPassword.indexOf(" "))
}
else {
message
}
}
}
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