Added some minor logging functionality using log4j

pom.xml

@@ -23,6 +23,16 @@
             <artifactId>tomlj</artifactId>
             <version>1.0.0</version>
         </dependency>
+        <dependency>
+            <groupId>org.apache.logging.log4j</groupId>
+            <artifactId>log4j-api</artifactId>
+            <version>2.17.2</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.logging.log4j</groupId>
+            <artifactId>log4j-core</artifactId>
+            <version>2.17.2</version>
+        </dependency>
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>

src/main/java/tech/bitgoblin/App.java

@@ -23,7 +23,7 @@ public class App {
     Transcoder t = new Transcoder(c);
     Timer timer = new Timer();
     timer.scheduleAtFixedRate(new RunTranscoderTask(t), 2500, ((long) c.getInt("transcoder.interval") * msToMinutes));
-    System.out.printf("Starting transcoder, running in %d minute intervals.%n", c.getInt("transcoder.interval"));
+    Logger.logger.info(String.format("Starting transcoder, running in %d minute intervals.", c.getInt("transcoder.interval")));
   }
 
 }

src/main/java/tech/bitgoblin/Logger.java

@@ -0,0 +1,9 @@
+package tech.bitgoblin;
+
+import org.apache.logging.log4j.LogManager;
+
+public class Logger {
+
+  public static org.apache.logging.log4j.Logger logger = LogManager.getLogger();
+
+}

src/main/java/tech/bitgoblin/config/Config.java

@@ -8,6 +8,7 @@ import java.util.Objects;
 
 import org.tomlj.Toml;
 import org.tomlj.TomlParseResult;
+import tech.bitgoblin.Logger;
 import tech.bitgoblin.io.IOUtils;
 
 public class Config {
@@ -21,7 +22,7 @@ public class Config {
     try {
       this.parseConfig();
     } catch (IOException e) {
-      System.out.println("Unable to read config file; please check that " + this.configPath + " is available.");
+      Logger.logger.info("Unable to read config file; please check that " + this.configPath + " is available.");
       System.exit(1);
     }
   }

src/main/java/tech/bitgoblin/transcoder/Repository.java

@@ -1,5 +1,6 @@
 package tech.bitgoblin.transcoder;
 
+import tech.bitgoblin.Logger;
 import tech.bitgoblin.io.IOUtils;
 
 import java.io.File;
@@ -33,7 +34,7 @@ public class Repository {
 
   // searches this ingest directory for video files
   public File[] searchIngest() {
-    System.out.println("Searching for files to transcode in " + this.ingestPath);
+    Logger.logger.info("Searching for files to transcode in " + this.ingestPath);
     File repo = new File(this.ingestPath);
     return repo.listFiles();
   }

src/main/java/tech/bitgoblin/transcoder/Transcoder.java

@@ -10,6 +10,7 @@ import java.nio.file.Paths;
 import java.nio.file.StandardCopyOption;
 import java.util.Timer;
 
+import tech.bitgoblin.Logger;
 import tech.bitgoblin.config.Config;
 import tech.bitgoblin.io.IOUtils;
 
@@ -46,12 +47,12 @@ public class Transcoder {
 
     // check if the ingest directory is empty
     if (sourceFiles.length == 0) {
-      System.out.println("There is nothing to transcode in ingest.");
+      Logger.logger.info("There is nothing to transcode in ingest.");
       return;
     }
 
     // transcode
-    System.out.println("Transcoding video files ingest...");
+    Logger.logger.info("Transcoding video files ingest...");
     for (File f : sourceFiles) {
       String filePath = f.toString().substring(0, f.toString().lastIndexOf("."));
       String filename = Paths.get(filePath).getFileName().toString();
@@ -73,16 +74,16 @@ public class Transcoder {
       try {
         Process process = pb.start();
         int ret = process.waitFor();
-        System.out.printf("Program exited with code: %d\n", ret);
+        Logger.logger.info("Program exited with code: %d", ret);
-        System.out.println();
+        Logger.logger.info("");
       } catch (IOException | InterruptedException e) {
         throw new RuntimeException(e);
       }
     }
 
     // end output
-    System.out.println("------------ End of transcoding ------------");
+    Logger.logger.info("------------ End of transcoding ------------");
-    System.out.println();
+    Logger.logger.info("");
   }
 
 }

src/main/resources/log4j2.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Configuration status="info" name="Dragoon" packages="">
+    <Appenders>
+        <File name="DragoonLog" fileName="logs/dragoon.log">
+            <PatternLayout>
+                <Pattern>%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n</Pattern>
+            </PatternLayout>
+        </File>
+    </Appenders>
+    <Loggers>
+        <Root level="info">
+            <AppenderRef ref="DragoonLog"/>
+        </Root>
+    </Loggers>
+</Configuration>