com.gigaspaces.logger
Class RollingFileHandler

java.lang.Object
  java.util.logging.Handler
      java.util.logging.StreamHandler
          com.gigaspaces.logger.RollingFileHandler

Direct Known Subclasses:

AuditHandler

public class RollingFileHandler
extends StreamHandler

Rolling based logging Handler.

Rollover:

Rollover is based on two policies, whichever policy is triggered first:

File size rolling policy (default 2MB)

Time based rolling policy (default is daily)

Properties:

formatter:

The default log output formatting is given by GSSimpleFormatter.

Configuration: com.gigaspaces.logger.RollingFileHandler.formatter = com.gigaspaces.logger.GSSimpleFormatter

filename-pattern:

The file name pattern can be configured to include a placeholder for properties to resolve, such as homedir, host, pid and date. Each placeholder is identified by a set of curly brackets {..}. It may also be a placeholder for a custom defined property.

Configuration: com.gigaspaces.logger.RollingFileHandler.filename-pattern = {homedir}/logs/{date,yyyy-MM-dd~HH.mm}-gigaspaces-{service}-{host}-{pid}.log

A place holder value is that of an overriding system property. If no override was specified, and the property is one of the predefined properties (i.e. homedir, host, pid, date), its value is evaluated by the handler implementation. If the place holder is of a custom property, and no value is defined, the propety is left as is. If any error occurs, it is reported and the property is replaced by an empty string. Example override by system property:

-Dcom.gigaspaces.logger.RollingFileHandler.filename-pattern.date=yyyy-MM-dd

append:

The append property specifies if output should be appended to an existing file. Default is set to false. Thus, if a file already exists by this name, a unique incrementing index to resolve the conflict will be concatenated. It will be added at the end of the filename replacing ".log" with "__{unique}.log" or at the end of the filename if the pattern doesn't end with ".log".

Configuration: com.gigaspaces.logger.RollingFileHandler.append = false

size-rolling-policy:

The file size rolling policy can be configured to roll the file when a size limit is reached. It specifies an approximate maximum amount to write (in bytes) to any one file. If this is zero, then there is no limit. If the property is omitted, then a default of 2MB is assumed.

Configuration: com.gigaspaces.logger.RollingFileHandler.size-rolling-policy = 2000000

time-rolling-policy:

The time based rolling policy can be configured to roll the file at an occurring schedule. The time policy can be set to either one of: daily, weekly, monthly or yearly. If the property is omitted, then the default pattern of "daily" is assumed; meaning daily rollover (at midnight). For example, if "monthly" is configured, the file will rollover at the beginning of each month.

Configuration: com.gigaspaces.logger.RollingFileHandler.time-rolling-policy = daily

backup-policy:

A backup-policy can be configured to backup files. By default a NullBackupPolicy is configured, which does nothing. It can be replaced by a DeleteBackupPolicy to keep a backup of files for a specified period. The BackupPolicy interface allows custom implementations to be plugged-in.

Configuration:
com.gigaspaces.logger.RollingFileHandler.backup-policy = com.gigaspaces.logger.DeleteBackupPolicy
com.gigaspaces.logger.DeleteBackupPolicy.period = 30
com.gigaspaces.logger.DeleteBackupPolicy.backup = 10

debug-level:

The debug level (configured to one of logging Levels) is the level in which debug messages are displayed to the "standard" output stream. By default the level is configured to "CONFIG" which displays the log file name.

Configuration: com.gigaspaces.logger.RollingFileHandler.debug-level = CONFIG

system property overrides

Any of the logger properties can be configured by a system property override, as specified by:

-Dcom.gigaspaces.logger.RollingFileHandler.[property-name]=[property-value]

For example:

-Dcom.gigaspaces.logger.RollingFileHandler.debug-level=OFF

Since:

7.0

Author:

Moran Avigdor

See Also:

RollingFileHandlerConfigurer

Field Summary

protected static String	APPEND_PROP
protected static String	BACKUP_POLICY_PROP
protected static String	DATE_PATTERN_DEFAULT
protected static String	DATE_PROP
protected static String	DEBUG_LEVEL
protected static String	DEBUG_LEVEL_DEFAULT
protected static String	FILE_APPEND_DEFAULT
protected static String	FILENAME_PATTERN_DEFAULT
protected static String	FILENAME_PATTERN_PROP
protected String	FILENAME_PATTTERN_PLACEHOLDER_PREFIX Resolves to the full class name of this handler and the ".filename-pattern" property at the end.
protected static String	FORMATTER_PROP
protected String	HANDLER_PROP_PREFIX Resolves to the full class name of this handler and a '.' at the end.
protected static String	HOMEDIR_PROP
protected static String	HOST_PROP
protected static String	LEVEL_PROP
protected static String	PID_PROP
protected static String	SERVICE_PROP
protected static int	SIZE_ROLLING_POLICY_DEFAULT
protected static String	SIZE_ROLLING_POLICY_PROP
protected static String	TIME_ROLLING_POLICY_DEFAULT
protected static String	TIME_ROLLING_POLICY_PROP

Constructor Summary

RollingFileHandler()
Construct a default RollingFileHandler.

Method Summary

protected void	configure() Configures this logger using the properties provided by the LogManager.getProperty(String) method.
static File[]	filesCreated()
static boolean	isMonitoringCreatedFiles()
static void	monitorCreatedFiles()
void	publish(LogRecord record) Applies the policies before writing to the stream; re-configures the stream if policy is triggered.

Methods inherited from class java.util.logging.StreamHandler

close, flush, isLoggable, setEncoding, setOutputStream

Methods inherited from class java.util.logging.Handler

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

Methods inherited from class java.lang.Object

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

Field Detail

HANDLER_PROP_PREFIX

protected final String HANDLER_PROP_PREFIX

Resolves to the full class name of this handler and a '.' at the end. Serves as the prefix for handler properties in logging configuration file and as the prefix for system property overrides.

 logging configuration file:
 com.gigaspaces.logger.RollingFileHandler.[property-name]=[property-value]
 
 System property:
 -Dcom.gigaspaces.logger.RollingFileHandler.[property-name]=[property-value]
 

LEVEL_PROP

protected static final String LEVEL_PROP

See Also:

Constant Field Values

FORMATTER_PROP

protected static final String FORMATTER_PROP

See Also:

Constant Field Values

FILENAME_PATTERN_PROP

protected static final String FILENAME_PATTERN_PROP

See Also:

Constant Field Values

SIZE_ROLLING_POLICY_PROP

protected static final String SIZE_ROLLING_POLICY_PROP

See Also:

Constant Field Values

TIME_ROLLING_POLICY_PROP

protected static final String TIME_ROLLING_POLICY_PROP

See Also:

Constant Field Values

BACKUP_POLICY_PROP

protected static final String BACKUP_POLICY_PROP

See Also:

Constant Field Values

APPEND_PROP

protected static final String APPEND_PROP

See Also:

Constant Field Values

DEBUG_LEVEL

protected static final String DEBUG_LEVEL

See Also:

Constant Field Values

FILENAME_PATTTERN_PLACEHOLDER_PREFIX

protected final String FILENAME_PATTTERN_PLACEHOLDER_PREFIX

Resolves to the full class name of this handler and the ".filename-pattern" property at the end. Serves as the prefix for filename-pattern place holder system property overrides.

 -Dcom.gigaspaces.logger.RollingFileHandler.filename-pattern.[placeholder-name]=[placeholder-value]
 

HOMEDIR_PROP

protected static final String HOMEDIR_PROP

See Also:

Constant Field Values

HOST_PROP

protected static final String HOST_PROP

See Also:

Constant Field Values

PID_PROP

protected static final String PID_PROP

See Also:

Constant Field Values

SERVICE_PROP

protected static final String SERVICE_PROP

See Also:

Constant Field Values

DATE_PROP

protected static final String DATE_PROP

See Also:

Constant Field Values

DATE_PATTERN_DEFAULT

protected static final String DATE_PATTERN_DEFAULT

See Also:

Constant Field Values

FILENAME_PATTERN_DEFAULT

protected static final String FILENAME_PATTERN_DEFAULT

See Also:

Constant Field Values

SIZE_ROLLING_POLICY_DEFAULT

protected static final int SIZE_ROLLING_POLICY_DEFAULT

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Constant Field Values

TIME_ROLLING_POLICY_DEFAULT

protected static final String TIME_ROLLING_POLICY_DEFAULT

See Also:

Constant Field Values

FILE_APPEND_DEFAULT

protected static final String FILE_APPEND_DEFAULT

See Also:

Constant Field Values

DEBUG_LEVEL_DEFAULT

protected static final String DEBUG_LEVEL_DEFAULT

See Also:

Constant Field Values

Constructor Detail

RollingFileHandler

public RollingFileHandler()

Construct a default RollingFileHandler. This will be configured entirely from LogManager properties (or their default values).

Method Detail

monitorCreatedFiles

public static void monitorCreatedFiles()

isMonitoringCreatedFiles

public static boolean isMonitoringCreatedFiles()

filesCreated

public static File[] filesCreated()

configure

protected void configure()

Configures this logger using the properties provided by the LogManager.getProperty(String) method. More specifically, configures the default ".level", ".formatter", ".filename-pattern", ".size-rolling-policy", ".time-rolling-policy", and ".append" properties.

The configure method is called only once at construction, but before any output stream is open.

A user may wish to extend this handler and provide additional configurations or overrides, before the output stream's file-name is generated. For example, a user may implement a process ID extension that assigns the appropriate system property with it's value, that will be used as the replacement for the default process ID extractor, which relies on ManagementFactory.getRuntimeMXBean().getName().

publish

public void publish(LogRecord record)

Applies the policies before writing to the stream; re-configures the stream if policy is triggered.

Overrides:

publish in class StreamHandler

See Also:

StreamHandler.publish(java.util.logging.LogRecord)