Redirect Syste.out/System.err to logger

Brokkonaut · Jul 2, 2020 · c14ae96 · c14ae96
1 parent 290fc4e
commit c14ae96
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Showing 3 changed files with 17 additions and 1 deletion.
diff --git a/pom.xml b/pom.xml
@@ -29,6 +29,11 @@
             <artifactId>log4j-jul</artifactId>
             <version>${log4j.version}</version>
         </dependency>
+        <dependency>
+            <groupId>org.apache.logging.log4j</groupId>
+            <artifactId>log4j-iostreams</artifactId>
+            <version>${log4j.version}</version>
+        </dependency>
         <dependency>
             <groupId>org.yaml</groupId>
             <artifactId>snakeyaml</artifactId>

diff --git a/src/main/java/de/cubeside/globalserver/GlobalServer.java b/src/main/java/de/cubeside/globalserver/GlobalServer.java
@@ -19,6 +19,7 @@
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.io.OutputStreamWriter;
+import java.io.PrintStream;
 import java.nio.charset.Charset;
 import java.util.ArrayList;
 import java.util.Collection;
@@ -28,15 +29,21 @@
 import java.util.List;
 import java.util.Objects;
 import java.util.UUID;
+import org.apache.logging.log4j.Level;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
+import org.apache.logging.log4j.io.IoBuilder;
 import org.yaml.snakeyaml.TypeDescription;
 import org.yaml.snakeyaml.Yaml;
 import org.yaml.snakeyaml.constructor.Constructor;
 
 public class GlobalServer {
     static {
         System.setProperty("java.util.logging.manager", "org.apache.logging.log4j.jul.LogManager");
+        PrintStream logger = IoBuilder.forLogger("System.out").setLevel(Level.INFO).buildPrintStream();
+        PrintStream errorLogger = IoBuilder.forLogger("System.err").setLevel(Level.ERROR).buildPrintStream();
+        System.setOut(logger);
+        System.setErr(errorLogger);
     }
     public final static Logger LOGGER = LogManager.getLogger("Server");
 

diff --git a/src/main/java/de/cubeside/globalserver/JLineAppender.java b/src/main/java/de/cubeside/globalserver/JLineAppender.java
@@ -1,5 +1,6 @@
 package de.cubeside.globalserver;
 
+import java.io.PrintStream;
 import java.io.Serializable;
 import org.apache.logging.log4j.core.Appender;
 import org.apache.logging.log4j.core.Core;
@@ -15,8 +16,11 @@
 
 @Plugin(name = "JLineAppender", category = Core.CATEGORY_NAME, elementType = Appender.ELEMENT_TYPE)
 public class JLineAppender extends AbstractAppender {
+    private PrintStream realSystemOut;
+
     protected JLineAppender(String name, Filter filter, Layout<? extends Serializable> layout) {
         super(name, filter, layout, true, Property.EMPTY_ARRAY);
+        realSystemOut = System.out;
     }
 
     @PluginFactory
@@ -31,7 +35,7 @@ public void append(LogEvent event) {
         if (console != null) {
             console.appendOutput(message);
         } else {
-            System.out.print(message);
+            realSystemOut.print(message);
         }
     }
 }