Log

pom.xml

@@ -20,6 +20,32 @@
             <artifactId>commons-text</artifactId>
             <version>1.4</version>
         </dependency>
+        <dependency>
+            <groupId>org.apache.logging.log4j</groupId>
+            <artifactId>log4j-api</artifactId>
+            <version>2.11.1</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.logging.log4j</groupId>
+            <artifactId>log4j-core</artifactId>
+            <version>2.11.1</version>
+        </dependency>
+
     </dependencies>
 
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.8.0</version>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+
 </project>

src/main/java/ch/hearc/ig/odi/stringcalculatortdd/StringCalculator.java

@@ -1,13 +1,17 @@
 package ch.hearc.ig.odi.stringcalculatortdd;
 
 import org.apache.commons.lang3.StringUtils;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 
 import java.util.ArrayList;
 import java.util.List;
-import java.util.regex.Pattern;
 
 public class StringCalculator {
 
+    private static final Logger LOGGER = LogManager.getLogger(StringCalculator.class);
+
+
     public StringCalculator() {
     }
 
@@ -19,6 +23,7 @@ public int add(final String numbers) {
         //if it begins by '//' then it's a personalize delimiter(s)
         if (numbers.startsWith("//")) {
             delimiter = this.extractDelimiter(numbers);
+            LOGGER.info("Un délimiteur personnalisé est détecté :" );
             //"cut" the beginning of the string so that the personalize delimiter is removed
             numbersUpdated = numbers.substring(numbers.indexOf("\n") + 1);
         }
@@ -36,9 +41,12 @@ private int add(final String numbersWithoutDelimiter, final String delimiter) {
             //test if the numbers array is not empty
             if (!(number.trim().length() == 0)) {
                 Integer numberInt = Integer.parseInt(number);
-                if (numberInt < 0)
+                if (numberInt < 0) {
+                    LOGGER.fatal("Exception des nombres négatifs est survenue !");
                     negativeNumbers.add(numberInt);
+                }
                 else if (numberInt <= 1000)
+                    LOGGER.warn("Un chiffre plus grand que 1'000 est utilisé");
                     returnValue += numberInt;
             }
         }

src/ressources/log4j2.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Configuration>
+    <Appenders>
+        <Console name="Console" target="SYSTEM_OUT">
+            <PatternLayout pattern="%d{HH:mm:ss} [%t] %-5level %c{10} - %msg%n"/>
+            <LevelRangeFilter minLevel="Info" maxLevel="Info" onMatch="ACCEPT" onMismatch="DENY"/>
+        </Console>
+        <File name="FileFatal" fileName="log/fatal.log">
+            <PatternLayout pattern="%d{HH:mm:ss} [%t] %-5level %c{10} - %msg%n"/>
+            <LevelRangeFilter minLevel="Fatal" maxLevel="Fatal" onMatch="ACCEPT" onMismatch="DENY"/>
+        </File>
+        <File name="FileWarning" fileName="log/warning.log">
+            <PatternLayout pattern="%d{HH:mm:ss} [%t] %-5level %c{10} - %msg%n"/>
+            <LevelRangeFilter minLevel="Warn" maxLevel="Warn" onMatch="ACCEPT" onMismatch="DENY"/>
+        </File>
+    </Appenders>
+    <Loggers>
+        <Root level="ALL">
+            <AppenderRef ref="Console"/>
+            <AppenderRef ref="FileFatal"/>
+            <AppenderRef ref="FileWarning"/>
+        </Root>
+    </Loggers>
+</Configuration>