com.ajaxjs.util.logger

类 FileHandler

java.lang.Object

java.util.logging.Handler

com.ajaxjs.util.logger.FileHandler

public class FileHandler
extends Handler

Implementation of Handler that appends log messages to a file named {prefix}{date}{suffix} in a configured directory.

The following configuration properties are available:

• directory - The directory where to create the log file. If the path is not absolute, it is relative to the current working directory of the application. The Apache Tomcat configuration files usually specify an absolute path for this property, ${catalina.base}/logs Default value: logs
• rotatable - If true, the log file will be rotated on the first write past midnight and the filename will be {prefix}{date}{suffix}, where date is yyyy-MM-dd. If false, the file will not be rotated and the filename will be {prefix}{suffix}. Default value: true
• prefix - The leading part of the log file name. Default value: juli.
• suffix - The trailing part of the log file name. Default value: .log
• bufferSize - Configures buffering. The value of 0 uses system default buffering (typically an 8K buffer will be used). A value of <0 forces a writer flush upon each log write. A value >0 uses a BufferedOutputStream with the defined value but note that the system default buffering will also be applied. Default value: -1
• encoding - Character set used by the log file. Default value: empty string, which means to use the system default character set.
• level - The level threshold for this Handler. See the java.util.logging.Level class for the possible levels. Default value: ALL
• filter - The java.util.logging.Filter implementation class name for this Handler. Default value: unset
• formatter - The java.util.logging.Formatter implementation class name for this Handler. Default value: java.util.logging.SimpleFormatter
• maxDays - The maximum number of days to keep the log files. If the specified value is <=0 then the log files will be kept on the file system forever, otherwise they will be kept the specified maximum days. Default value: -1.

字段概要

字段

限定符和类型	字段和说明
static int	DEFAULT_MAX_DAYS
static String	LOG_PATH
protected ReadWriteLock	writerLock Lock used to control access to the writer.

构造器概要

构造器

构造器和说明
FileHandler()
FileHandler(String directory, String prefix, String suffix)
FileHandler(String directory, String prefix, String suffix, int maxDays)

方法概要

限定符和类型	方法和说明
void	close() Close the currently open log file (if any).
protected void	closeWriter()
void	flush() Flush the writer.
protected void	open() Open the new log file for the date specified by date.
protected void	openWriter()
void	publish(LogRecord record) Format and publish a LogRecord.

从类继承的方法 java.util.logging.Handler

getEncoding, getErrorManager, getFilter, getFormatter, getLevel, isLoggable, reportError, setEncoding, setErrorManager, setFilter, setFormatter, setLevel

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

DEFAULT_MAX_DAYS

public static final int DEFAULT_MAX_DAYS

另请参阅:

常量字段值

writerLock

protected ReadWriteLock writerLock

Lock used to control access to the writer.

LOG_PATH

public static String LOG_PATH

构造器详细资料

FileHandler

public FileHandler()

FileHandler

public FileHandler(String directory,
                   String prefix,
                   String suffix)

FileHandler

public FileHandler(String directory,
                   String prefix,
                   String suffix,
                   int maxDays)

方法详细资料

publish

public void publish(LogRecord record)

Format and publish a LogRecord.

指定者:

publish 在类中 Handler

参数:

record - description of the log event

close

public void close()

Close the currently open log file (if any).

指定者:

close 在类中 Handler

closeWriter

protected void closeWriter()

flush

public void flush()

Flush the writer.

指定者:

flush 在类中 Handler

open

protected void open()

Open the new log file for the date specified by date.

openWriter

protected void openWriter()