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Add configurable output stream to AnsiLog to avoid hardcoded System.out #3128

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Merged
hengyunabc merged 2 commits into from
Jan 9, 2026
+42 −15
Merged

Add configurable output stream to AnsiLog to avoid hardcoded System.out #3128

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d22886c
Initial plan
Copilot Jan 9, 2026
ab7659f
Add configurable output stream to AnsiLog
Copilot Jan 9, 2026
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57 changes: 42 additions & 15 deletions common/src/main/java/com/taobao/arthas/common/AnsiLog.java
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
package com.taobao.arthas.common;

import java.io.PrintStream;
import java.util.logging.Level;
import java.util.regex.Matcher;

Expand All @@ -23,6 +24,11 @@ public abstract class AnsiLog {

static boolean enableColor;

/**
* Output stream for log messages, defaults to System.out.
*/
private static volatile PrintStream out = System.out;

public static java.util.logging.Level LEVEL = java.util.logging.Level.CONFIG;

private static final String RESET = "\033[0m";
Expand Down Expand Up @@ -77,6 +83,27 @@ public static boolean enableColor() {
return enableColor;
}

/**
* 设置日志输出流
*
* @param printStream 输出流，传入 null 时使用 System.out
* @return 之前的输出流
*/
public static PrintStream out(PrintStream printStream) {
PrintStream old = out;
out = printStream == null ? System.out : printStream;
return old;
}

/**
* 获取当前日志输出流
*
* @return 当前输出流
*/
public static PrintStream out() {
return out;
}

/**
* set logger Level
*
Expand Down Expand Up @@ -170,9 +197,9 @@ private static String colorStr(String msg, int colorCode) {
public static void trace(String msg) {
if (canLog(Level.FINEST)) {
if (enableColor) {
System.out.println(TRACE_COLOR_PREFIX + msg);
out.println(TRACE_COLOR_PREFIX + msg);
} else {
System.out.println(TRACE_PREFIX + msg);
out.println(TRACE_PREFIX + msg);
}
}
}
Expand All @@ -185,16 +212,16 @@ public static void trace(String format, Object... arguments) {

public static void trace(Throwable t) {
if (canLog(Level.FINEST)) {
t.printStackTrace(System.out);
t.printStackTrace(out);
}
}

public static void debug(String msg) {
if (canLog(Level.FINER)) {
if (enableColor) {
System.out.println(DEBUG_COLOR_PREFIX + msg);
out.println(DEBUG_COLOR_PREFIX + msg);
} else {
System.out.println(DEBUG_PREFIX + msg);
out.println(DEBUG_PREFIX + msg);
}
}
}
Expand All @@ -207,16 +234,16 @@ public static void debug(String format, Object... arguments) {

public static void debug(Throwable t) {
if (canLog(Level.FINER)) {
t.printStackTrace(System.out);
t.printStackTrace(out);
}
}

public static void info(String msg) {
if (canLog(Level.CONFIG)) {
if (enableColor) {
System.out.println(INFO_COLOR_PREFIX + msg);
out.println(INFO_COLOR_PREFIX + msg);
} else {
System.out.println(INFO_PREFIX + msg);
out.println(INFO_PREFIX + msg);
}
}
}
Expand All @@ -229,16 +256,16 @@ public static void info(String format, Object... arguments) {

public static void info(Throwable t) {
if (canLog(Level.CONFIG)) {
t.printStackTrace(System.out);
t.printStackTrace(out);
}
}

public static void warn(String msg) {
if (canLog(Level.WARNING)) {
if (enableColor) {
System.out.println(WARN_COLOR_PREFIX + msg);
out.println(WARN_COLOR_PREFIX + msg);
} else {
System.out.println(WARN_PREFIX + msg);
out.println(WARN_PREFIX + msg);
}
}
}
Expand All @@ -251,16 +278,16 @@ public static void warn(String format, Object... arguments) {

public static void warn(Throwable t) {
if (canLog(Level.WARNING)) {
t.printStackTrace(System.out);
t.printStackTrace(out);
}
}

public static void error(String msg) {
if (canLog(Level.SEVERE)) {
if (enableColor) {
System.out.println(ERROR_COLOR_PREFIX + msg);
out.println(ERROR_COLOR_PREFIX + msg);
} else {
System.out.println(ERROR_PREFIX + msg);
out.println(ERROR_PREFIX + msg);
}
}
}
Expand All @@ -273,7 +300,7 @@ public static void error(String format, Object... arguments) {

public static void error(Throwable t) {
if (canLog(Level.SEVERE)) {
t.printStackTrace(System.out);
t.printStackTrace(out);
}
}

Expand Down
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