Lesson10: Add logging

.gitignore

@@ -6,3 +6,4 @@ log
 *.patch
 
 
+/src/main/java/META-INF/MANIFEST.MF

pom.xml

@@ -1,4 +1,4 @@
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+ <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
     <modelVersion>4.0.0</modelVersion>
 
@@ -15,6 +15,10 @@
         <java.version>1.8</java.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+
+        <!-- Logging -->
+        <logback.version>1.2.3</logback.version>
+        <slf4j.version>1.7.28</slf4j.version>
     </properties>
 
     <build>
@@ -34,6 +38,28 @@
     </build>
 
     <dependencies>
+        <!-- Logging with SLF4J & LogBack -->
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-api</artifactId>
+            <version>${slf4j.version}</version>
+            <scope>compile</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>jcl-over-slf4j</artifactId>
+            <version>${slf4j.version}</version>
+            <scope>runtime</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>ch.qos.logback</groupId>
+            <artifactId>logback-classic</artifactId>
+            <version>${logback.version}</version>
+            <scope>runtime</scope>
+        </dependency>
+
         <!--Web-->
         <dependency>
             <groupId>javax.servlet</groupId>

src/main/java/ru/javawebinar/topjava/web/UserServlet.java

@@ -1,16 +1,22 @@
 package ru.javawebinar.topjava.web;
 
+import org.slf4j.Logger;
+
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;
 
+import static org.slf4j.LoggerFactory.getLogger;
+
 public class UserServlet extends HttpServlet {
+    private static final Logger LOG = getLogger(UserServlet.class);
 
     @Override
     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+        LOG.debug("redirect to userList");
         response.sendRedirect("/users.jsp");
-     //   request.getRequestDispatcher("/users.jsp").forward(request, response);
+        //   request.getRequestDispatcher("/users.jsp").forward(request, response);
     }
 }

src/main/resources/logback.xml

@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration scan="true" scanPeriod="30 seconds">
+
+    <!-- To enable JMX Management -->
+    <jmxConfigurator/>
+
+    <appender name="file" class="ch.qos.logback.core.FileAppender">
+        <file>${TOPJAVA_ROOT}/log/topjava.log</file>
+
+        <encoder>
+            <charset>UTF-8</charset>
+            <pattern>%date %-5level %logger{0} [%file:%line] %msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <appender name="console" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <charset>UTF-8</charset>
+            <pattern>%-5level %logger{0} [%file:%line] %msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <logger name="ru.javawebinar.topjava" level="debug"/>
+
+    <root level="info">
+        <appender-ref ref="file"/>
+        <appender-ref ref="console"/>
+    </root>
+</configuration>