org.eclipse.jetty.util.log.StdErrLog Maven / Gradle / Ivy
//
// ========================================================================
// Copyright (c) 1995-2016 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.util.log;
import java.io.PrintStream;
import java.security.AccessControlException;
import java.util.Properties;
import org.eclipse.jetty.util.DateCache;
/**
* StdErr Logging. This implementation of the Logging facade sends all logs to StdErr with minimal formatting.
*
* If the system property "org.eclipse.jetty.LEVEL" is set to one of the following (ALL, DEBUG, INFO, WARN), then set
* the eclipse jetty root level logger level to that specified level. (Default level is INFO)
*
* If the system property "org.eclipse.jetty.util.log.SOURCE" is set, then the source method/file of a log is logged.
* For named debuggers, the system property name+".SOURCE" is checked, eg "org.eclipse.jetty.util.log.stderr.SOURCE".
* If it is not not set, then "org.eclipse.jetty.util.log.SOURCE" is used as the default.
*
* If the system property "org.eclipse.jetty.util.log.stderr.LONG" is set, then the full, unabbreviated name of the logger is
* used for logging.
*/
public class StdErrLog extends AbstractLogger
{
private static final String EOL = System.getProperty("line.separator");
private static DateCache _dateCache;
private static final Properties __props = new Properties();
private final static boolean __source = Boolean.parseBoolean(Log.__props.getProperty("org.eclipse.jetty.util.log.SOURCE",
Log.__props.getProperty("org.eclipse.jetty.util.log.stderr.SOURCE","false")));
private final static boolean __long = Boolean.parseBoolean(Log.__props.getProperty("org.eclipse.jetty.util.log.stderr.LONG","false"));
static
{
__props.putAll(Log.__props);
String deprecatedProperties[] =
{ "DEBUG", "org.eclipse.jetty.util.log.DEBUG", "org.eclipse.jetty.util.log.stderr.DEBUG" };
// Toss a message to users about deprecated system properties
for (String deprecatedProp : deprecatedProperties)
{
if (System.getProperty(deprecatedProp) != null)
{
System.err.printf("System Property [%s] has been deprecated! (Use org.eclipse.jetty.LEVEL=DEBUG instead)%n",deprecatedProp);
}
}
try
{
_dateCache = new DateCache("yyyy-MM-dd HH:mm:ss");
}
catch (Exception x)
{
x.printStackTrace(System.err);
}
}
public static final int LEVEL_ALL = 0;
public static final int LEVEL_DEBUG = 1;
public static final int LEVEL_INFO = 2;
public static final int LEVEL_WARN = 3;
private int _level = LEVEL_INFO;
// Level that this Logger was configured as (remembered in special case of .setDebugEnabled())
private int _configuredLevel;
private PrintStream _stderr = null;
private boolean _source = __source;
// Print the long form names, otherwise use abbreviated
private boolean _printLongNames = __long;
// The full log name, as provided by the system.
private final String _name;
// The abbreviated log name (used by default, unless _long is specified)
private final String _abbrevname;
private boolean _hideStacks = false;
public StdErrLog()
{
this(null);
}
public StdErrLog(String name)
{
this(name,__props);
}
public StdErrLog(String name, Properties props)
{
if (props!=null && props!=__props)
__props.putAll(props);
this._name = name == null?"":name;
this._abbrevname = condensePackageString(this._name);
this._level = getLoggingLevel(props,this._name);
this._configuredLevel = this._level;
try
{
_source = Boolean.parseBoolean(props.getProperty(_name + ".SOURCE",Boolean.toString(_source)));
}
catch (AccessControlException ace)
{
_source = __source;
}
}
/**
* Get the Logging Level for the provided log name. Using the FQCN first, then each package segment from longest to
* shortest.
*
* @param props
* the properties to check
* @param name
* the name to get log for
* @return the logging level
*/
public static int getLoggingLevel(Properties props, final String name)
{
// Calculate the level this named logger should operate under.
// Checking with FQCN first, then each package segment from longest to shortest.
String nameSegment = name;
while ((nameSegment != null) && (nameSegment.length() > 0))
{
String levelStr = props.getProperty(nameSegment + ".LEVEL");
// System.err.printf("[StdErrLog.CONFIG] Checking for property [%s.LEVEL] = %s%n",nameSegment,levelStr);
int level = getLevelId(nameSegment + ".LEVEL",levelStr);
if (level != (-1))
{
return level;
}
// Trim and try again.
int idx = nameSegment.lastIndexOf('.');
if (idx >= 0)
{
nameSegment = nameSegment.substring(0,idx);
}
else
{
nameSegment = null;
}
}
// Default Logging Level
return getLevelId("log.LEVEL",props.getProperty("log.LEVEL","INFO"));
}
protected static int getLevelId(String levelSegment, String levelName)
{
if (levelName == null)
{
return -1;
}
String levelStr = levelName.trim();
if ("ALL".equalsIgnoreCase(levelStr))
{
return LEVEL_ALL;
}
else if ("DEBUG".equalsIgnoreCase(levelStr))
{
return LEVEL_DEBUG;
}
else if ("INFO".equalsIgnoreCase(levelStr))
{
return LEVEL_INFO;
}
else if ("WARN".equalsIgnoreCase(levelStr))
{
return LEVEL_WARN;
}
System.err.println("Unknown StdErrLog level [" + levelSegment + "]=[" + levelStr + "], expecting only [ALL, DEBUG, INFO, WARN] as values.");
return -1;
}
/**
* Condenses a classname by stripping down the package name to just the first character of each package name
* segment.Configured
*
*
*
* Examples:
* "org.eclipse.jetty.test.FooTest" = "oejt.FooTest"
* "org.eclipse.jetty.server.logging.LogTest" = "orjsl.LogTest"
*
*
* @param classname
* the fully qualified class name
* @return the condensed name
*/
protected static String condensePackageString(String classname)
{
String parts[] = classname.split("\\.");
StringBuilder dense = new StringBuilder();
for (int i = 0; i < (parts.length - 1); i++)
{
dense.append(parts[i].charAt(0));
}
if (dense.length() > 0)
{
dense.append('.');
}
dense.append(parts[parts.length - 1]);
return dense.toString();
}
public String getName()
{
return _name;
}
public void setPrintLongNames(boolean printLongNames)
{
this._printLongNames = printLongNames;
}
public boolean isPrintLongNames()
{
return this._printLongNames;
}
public boolean isHideStacks()
{
return _hideStacks;
}
public void setHideStacks(boolean hideStacks)
{
_hideStacks = hideStacks;
}
/* ------------------------------------------------------------ */
/**
* Is the source of a log, logged
*
* @return true if the class, method, file and line number of a log is logged.
*/
public boolean isSource()
{
return _source;
}
/* ------------------------------------------------------------ */
/**
* Set if a log source is logged.
*
* @param source
* true if the class, method, file and line number of a log is logged.
*/
public void setSource(boolean source)
{
_source = source;
}
public void warn(String msg, Object... args)
{
if (_level <= LEVEL_WARN)
{
StringBuilder buffer = new StringBuilder(64);
format(buffer,":WARN:",msg,args);
(_stderr==null?System.err:_stderr).println(buffer);
}
}
public void warn(Throwable thrown)
{
warn("",thrown);
}
public void warn(String msg, Throwable thrown)
{
if (_level <= LEVEL_WARN)
{
StringBuilder buffer = new StringBuilder(64);
format(buffer,":WARN:",msg,thrown);
(_stderr==null?System.err:_stderr).println(buffer);
}
}
public void info(String msg, Object... args)
{
if (_level <= LEVEL_INFO)
{
StringBuilder buffer = new StringBuilder(64);
format(buffer,":INFO:",msg,args);
(_stderr==null?System.err:_stderr).println(buffer);
}
}
public void info(Throwable thrown)
{
info("",thrown);
}
public void info(String msg, Throwable thrown)
{
if (_level <= LEVEL_INFO)
{
StringBuilder buffer = new StringBuilder(64);
format(buffer,":INFO:",msg,thrown);
(_stderr==null?System.err:_stderr).println(buffer);
}
}
public boolean isDebugEnabled()
{
return (_level <= LEVEL_DEBUG);
}
/**
* Legacy interface where a programmatic configuration of the logger level
* is done as a wholesale approach.
*/
public void setDebugEnabled(boolean enabled)
{
if (enabled)
{
this._level = LEVEL_DEBUG;
for (Logger log : Log.getLoggers().values())
{
if (log.getName().startsWith(getName()) && log instanceof StdErrLog)
((StdErrLog)log).setLevel(LEVEL_DEBUG);
}
}
else
{
this._level = this._configuredLevel;
for (Logger log : Log.getLoggers().values())
{
if (log.getName().startsWith(getName()) && log instanceof StdErrLog)
((StdErrLog)log).setLevel(((StdErrLog)log)._configuredLevel);
}
}
}
public int getLevel()
{
return _level;
}
/**
* Set the level for this logger.
*
* Available values ({@link StdErrLog#LEVEL_ALL}, {@link StdErrLog#LEVEL_DEBUG}, {@link StdErrLog#LEVEL_INFO},
* {@link StdErrLog#LEVEL_WARN})
*
* @param level
* the level to set the logger to
*/
public void setLevel(int level)
{
this._level = level;
}
public void setStdErrStream(PrintStream stream)
{
this._stderr = stream==System.err?null:stream;
}
public void debug(String msg, Object... args)
{
if (_level <= LEVEL_DEBUG)
{
StringBuilder buffer = new StringBuilder(64);
format(buffer,":DBUG:",msg,args);
(_stderr==null?System.err:_stderr).println(buffer);
}
}
public void debug(Throwable thrown)
{
debug("",thrown);
}
public void debug(String msg, Throwable thrown)
{
if (_level <= LEVEL_DEBUG)
{
StringBuilder buffer = new StringBuilder(64);
format(buffer,":DBUG:",msg,thrown);
(_stderr==null?System.err:_stderr).println(buffer);
}
}
private void format(StringBuilder buffer, String level, String msg, Object... args)
{
String d = _dateCache.now();
int ms = _dateCache.lastMs();
tag(buffer,d,ms,level);
format(buffer,msg,args);
}
private void format(StringBuilder buffer, String level, String msg, Throwable thrown)
{
format(buffer,level,msg);
if (isHideStacks())
{
format(buffer,String.valueOf(thrown));
}
else
{
format(buffer,thrown);
}
}
private void tag(StringBuilder buffer, String d, int ms, String tag)
{
buffer.setLength(0);
buffer.append(d);
if (ms > 99)
{
buffer.append('.');
}
else if (ms > 9)
{
buffer.append(".0");
}
else
{
buffer.append(".00");
}
buffer.append(ms).append(tag);
if (_printLongNames)
{
buffer.append(_name);
}
else
{
buffer.append(_abbrevname);
}
buffer.append(':');
if (_source)
{
Throwable source = new Throwable();
StackTraceElement[] frames = source.getStackTrace();
for (int i = 0; i < frames.length; i++)
{
final StackTraceElement frame = frames[i];
String clazz = frame.getClassName();
if (clazz.equals(StdErrLog.class.getName()) || clazz.equals(Log.class.getName()))
{
continue;
}
if (!_printLongNames && clazz.startsWith("org.eclipse.jetty."))
{
buffer.append(condensePackageString(clazz));
}
else
{
buffer.append(clazz);
}
buffer.append('#').append(frame.getMethodName());
if (frame.getFileName() != null)
{
buffer.append('(').append(frame.getFileName()).append(':').append(frame.getLineNumber()).append(')');
}
buffer.append(':');
break;
}
}
}
private void format(StringBuilder builder, String msg, Object... args)
{
if (msg == null)
{
msg = "";
for (int i = 0; i < args.length; i++)
{
msg += "{} ";
}
}
String braces = "{}";
int start = 0;
for (Object arg : args)
{
int bracesIndex = msg.indexOf(braces,start);
if (bracesIndex < 0)
{
escape(builder,msg.substring(start));
builder.append(" ");
builder.append(arg);
start = msg.length();
}
else
{
escape(builder,msg.substring(start,bracesIndex));
builder.append(String.valueOf(arg));
start = bracesIndex + braces.length();
}
}
escape(builder,msg.substring(start));
}
private void escape(StringBuilder builder, String string)
{
for (int i = 0; i < string.length(); ++i)
{
char c = string.charAt(i);
if (Character.isISOControl(c))
{
if (c == '\n')
{
builder.append('|');
}
else if (c == '\r')
{
builder.append('<');
}
else
{
builder.append('?');
}
}
else
{
builder.append(c);
}
}
}
private void format(StringBuilder buffer, Throwable thrown)
{
if (thrown == null)
{
buffer.append("null");
}
else
{
buffer.append(EOL);
format(buffer,thrown.toString());
StackTraceElement[] elements = thrown.getStackTrace();
for (int i = 0; elements != null && i < elements.length; i++)
{
buffer.append(EOL).append("\tat ");
format(buffer,elements[i].toString());
}
Throwable cause = thrown.getCause();
if (cause != null && cause != thrown)
{
buffer.append(EOL).append("Caused by: ");
format(buffer,cause);
}
}
}
/**
* Create a Child Logger of this Logger.
*/
protected Logger newLogger(String fullname)
{
StdErrLog logger = new StdErrLog(fullname);
// Preserve configuration for new loggers configuration
logger.setPrintLongNames(_printLongNames);
// Let Level come from configured Properties instead - sel.setLevel(_level);
logger.setSource(_source);
logger._stderr = this._stderr;
// Force the child to have any programmatic configuration
if (_level!=_configuredLevel)
logger._level=_level;
return logger;
}
@Override
public String toString()
{
StringBuilder s = new StringBuilder();
s.append("StdErrLog:");
s.append(_name);
s.append(":LEVEL=");
switch (_level)
{
case LEVEL_ALL:
s.append("ALL");
break;
case LEVEL_DEBUG:
s.append("DEBUG");
break;
case LEVEL_INFO:
s.append("INFO");
break;
case LEVEL_WARN:
s.append("WARN");
break;
default:
s.append("?");
break;
}
return s.toString();
}
public static void setProperties(Properties props)
{
__props.clear();
__props.putAll(props);
}
public void ignore(Throwable ignored)
{
if (_level <= LEVEL_ALL)
{
StringBuilder buffer = new StringBuilder(64);
format(buffer,":IGNORED:","",ignored);
(_stderr==null?System.err:_stderr).println(buffer);
}
}
}