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Use Log4j IOStreams to redirect System.out/err to logger

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Log4j2 provides an optimized implementation of PrintStream that
redirects its output to a logger. Use it instead of a custom
implementation for minor performance improvements and some fixes.

With the old implementation, each call to System.print()
results in a separate line, even though it should not result in
a line break. Log4j's implementation handles it correctly.
This commit is contained in:
Minecrell 2017-09-18 12:07:47 +02:00
parent 1eadde1ee5
commit 10893fea38
1 changed files with 51 additions and 0 deletions
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Spigot-Server-Patches/0238-Use-Log4j-IOStreams-to-redirect-System.out-err-to-lo.patch Normal file
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@ -0,0 +1,51 @@
From a7ced92f0d09b6e25e5c66dc24db2da45f3341f7 Mon Sep 17 00:00:00 2001
From: Minecrell <dev@minecrell.net>
Date: Mon, 18 Sep 2017 12:00:03 +0200
Subject: [PATCH] Use Log4j IOStreams to redirect System.out/err to logger
Log4j2 provides an optimized implementation of PrintStream that
redirects its output to a logger. Use it instead of a custom
implementation for minor performance improvements and some fixes.
With the old implementation, each call to System.print()
results in a separate line, even though it should not result in
a line break. Log4j's implementation handles it correctly.
diff --git a/pom.xml b/pom.xml
index 98972114d..aff997468 100644
--- a/pom.xml
+++ b/pom.xml
@@ -97,6 +97,13 @@
<scope>runtime</scope>
</dependency>
+ <!-- Paper - Add additional Log4J dependencies -->
+ <dependency>
+ <groupId>org.apache.logging.log4j</groupId>
+ <artifactId>log4j-iostreams</artifactId>
+ <version>2.8.1</version>
+ </dependency>
+
<!-- testing -->
<dependency>
<groupId>junit</groupId>
diff --git a/src/main/java/net/minecraft/server/DedicatedServer.java b/src/main/java/net/minecraft/server/DedicatedServer.java
index b3f1aa999..854455711 100644
--- a/src/main/java/net/minecraft/server/DedicatedServer.java
+++ b/src/main/java/net/minecraft/server/DedicatedServer.java
@@ -129,8 +129,10 @@ public class DedicatedServer extends MinecraftServer implements IMinecraftServer
*/
// Paper end
- System.setOut(new PrintStream(new LoggerOutputStream(logger, Level.INFO), true));
- System.setErr(new PrintStream(new LoggerOutputStream(logger, Level.WARN), true));
+ // Paper start - Use Log4j IOStreams
+ System.setOut(org.apache.logging.log4j.io.IoBuilder.forLogger(logger).setLevel(Level.INFO).buildPrintStream());
+ System.setErr(org.apache.logging.log4j.io.IoBuilder.forLogger(logger).setLevel(Level.WARN).buildPrintStream());
+ // Paper end
// CraftBukkit end
thread.setDaemon(true);
--
2.14.1