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h1. Logging systems

Petals ESB uses two distinct logging systems. Most of the container apart form the registry uses the logger provided by the JDK, while the registry uses Apache log4j.

The Petals ESB logger configuration is splitted into two default files:
* $PETALS_HOME/conf/loggers.properties: the JDK logger configuration. This default location can be overriden using the Java properties "java.util.logging.config.file" to set on the java command line in the startup script or in the environement varaible JAVA_OPTS.
* $PETALS_HOME/conf/log4j.properties: the log4j logger configuration.
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{panel:title=Petals logging Documentations}{children:all=true}{panel}
{panel:title=Contributors}{contributors:order=name|mode=list}{panel}
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{section}

h1. Petals Logging specificities


h2. Level 'MONIT'

Petals defines a specific level: MONIT, that can be used by a log parser to monitor the exchanges in Petals ESB.

The level MONIT is inserted between levels CONFIG and FINE:
* SEVERE (highest value)
* WARNING
* INFO
* CONFIG
* *MONIT*
* FINE
* FINER
* FINEST (lowest value)

Moreover standard information of each log level, a MONIT level trace is accompanied by following information:
* a trace code identifying the nature of the MONIT trace. See below the list of trace code.
* a process instance identifier identifying the process instance,
* a process loop identifier identifying the loop instance in which the service provider is invoked,
* a process branch identifier identifying the branch instance in which the service provider is invoked,
* specific information to the trace code
* a text message explaining the event
* if the extended mode is enabled: the reference where the message content is stored. The content stored is defined accordingly to the trace code.

|| Trace code \\ || Description || Specific information \\ || Message content stored \\ ||
| MON-001 | A service associated to an internal endpoint receives an incoming request. \\ | * the invoked interface name, or empty if not defined,
* the invoked service name, or empty if not defined,
* the invoked endpoint name,
* the invoked operation name,
* the consumer endpoint name | * request XML payload
* message properties
* attachments |
| MON-002 | An endpoint invokes a service provider \\ | * the interface name to invoke, or empty if not defined,
* the service name to invoke, or empty if not defined,
* the endpoint name to invoke, or empty if not defined,
* the operation to invoke, or empty if not defined | * request XML payload
* message properties
* attachments |
| MON-003 | A service provider returns a reply to the caller \\ | * the consumer endpoint \\ | * reply XML payload, or fault or error,
* message properties
* attachments |
| MON-004 | A service consumer receives a reply from a service provider \\ | \- \\ | * reply XML payload, or fault or error,
* message properties
* attachments |
| MON-005 | A binding component receives an incoming request from outside \\ | * specific information defined at the component level to identify the outside client,
* specific information defined at the component level to identify the consume service unit | * message content stored defined at the component level |
| MON-006 | A binding component invokes an external service provider \\ | * specific information defined at the component level to identify the external service provider | * message content stored defined at the component level |
| MON-007 | A binding component receives a reply from an external service provider | \- \\ | * message content stored defined at the component level |
| MON-008 | A binding component returns a reply to an external service consumer \\ | \- \\ | * message content stored defined at the component level |

h2. Default levels

The default root logger level is WARNING. It means that all classes log only SEVERE and WARNING information.

The default Petals root logger level is INFO. That's why all Petals components will log only SEVERE, WARNING and INFO information.


You can enable logging and specify a specific level for each module (container, component, cdk...). Here is how you would set debugging from Petals. You would need to ensure the Handler's level is also set to collect this threshold, so FINEST or ALL should be set.
{code}
##Petals level
Petals.level = FINEST

#Handler Configuration
java.util.logging.ConsoleHandler.level = FINEST
{code}

Example of configuration to debug (Level FINEST) petals-bc-soap component:
{code}
##Petals level
Petals.level = INFO #Log level for all petals services
Petals.Container.Components.petals-bc-soap.level = FINEST #Log level for petals-bc-soap component

#Handler Configuration
java.util.logging.ConsoleHandler.level = FINEST
{code}

h2. Petals formatters

Petals provides two formatters: PetalsSimpleFormatter and PetalsExtendedFormatter.

PetalsSimpleFormatter uses the following pattern:
{panel:borderStyle=solid}{+}YYYY/MM/DD+ +HH:MM:SS,FFF+ +LOG LEVEL+ +LOGGER NAME+ : ?\[LOG MESSAGE\]
\[EXTRA DATA KEY\] = '\[EXTRA DATA VALUE\]'
\[JAVA EXCEPTION\]{panel}


PetalsExtendedFormatter is used to log message content (payload XML of SOAP or JBI Message), attachment names and properties.

The pattern of PetalsExtendedFormatter inherits from the pattern of PetalsSimpleFormatter.

*Example of logging output with PetalsSimpleFormatter:*
{panel:borderStyle=solid}
2011/03/16 14:04:20,829 MONIT \[Petals.Container.Components.petals-bc-soap\] : External request received
client = '192.168.1.95'
processBranchId = '0'
processInstanceId = 'petals:uid:e871ffb0-4fcd-11e0-b428-00123feb3632'
processLoopId = '0'
requestedUrl = 'http://192.168.1.95:8080/petals/services/LoggerDemoService/'
traceCode = 'MON005'
{panel}

*Example of logging output with PetalsExtendedFormatter:*
{panel:borderStyle=solid}
2011/03/16 15:57:33,798 MONIT \[Petals.Container.Components.petals-bc-soap\] : External request received
attachmentNames = ''
client = '192.168.1.95'
processBranchId = '0'
processInstanceId = 'petals:uid:b95be910-4fdd-11e0-b678-00123feb3632'
processLoopId = '0'
requestedUrl = 'http://192.168.1.95:8080/petals/services/LoggerDemoService/'
soapEnvelope = '<?xml version='1.0' encoding='utf-8'?><soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:log="http://petals.ow2.org/bpel/LoggerDemo/"><soapenv:Body>
<log:LoggerDemoRequest>
<log:input>test</log:input>
</log:LoggerDemoRequest>
</soapenv:Body></soapenv:Envelope>'
traceCode = 'MON005'
{panel}

{builder-infopanel:The performance of Petals ESB is reduced when the PetalsExtendendFormatter is activate.}
{info:title=Default behavior}One or both previous formatters are always used during execution, unless default handler formatters in ../conf/logger.properties are changed
{info}
If following formatter is applied for both handlers:

*java.util.logging.FileHandler.formatter = org.ow2.petals.commons.logger.PetalsSimpleFormatter*
*java.util.logging.ConsoleHandler.formatter = org.ow2.petals.commons.logger.PetalsSimpleFormatter*

All logs are processed by the PetalsSimpleFormatter whether we are in _FINEST{_}_, SEVERE, CONFIG ... MONIT_, but

Following informations are +common{+}{+}s+ to both formatters:
* Timestamp
* Logger level
* Logger component name
* Log message
* Process branch identifier
* Process instance identifier
* Process loop identifier
* Trace code

We can found more informations about previous concepts in glossary [Glossary|http://doc.petalslink.com/display/glossary/Petals+ESB+specific+vocabulary]

we can recover following additional informations:
* Requested URL
* Soap envelope content
* Attachment names
* Client IP adress
&nbsp;
&nbsp;
{tip:title=Multiple formatter utilizations}We can also use both formatter for different purposes
&nbsp;
* If you don't want too much information in Petals console, we can keep the *"Simple"* formatter with following property:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; java.util.logging.ConsoleHandler.formatter = org.ow2.petals.commons.logger.PetalsSimpleFormatter

* If you want more detailled informations accessible at all times prefer the *"Extended"* formatter in Petals log file with following property:
java.util.logging.FileHandler.formatter = org.ow2.petals.commons.logger.PetalsExtendedFormatter
{tip}
&nbsp;
&nbsp;
{warning:title=Environment variable}
Take in account if the following variable is define or not:

_\-Djava.util.logging.config.file=$PETALS_HOME/conf/loggers.properties"_

Because, if the previous argument on your Petals process is setted to another logging file, the loggers.properties under /conf +will not be take in account+.

This setting can create a real problem, you do not necessarily understand where it comes directly
{warning}


h1. Appendix

h2. Default loggers.properties

The default *loggers.properties* is :
{noformat}# PETALS: PETALS Services Platform
# Copyright (C) 2005 EBM WebSourcing
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
# USA.
#
# Initial developer(s): EBM WebSourcing


handlers=java.util.logging.FileHandler, java.util.logging.ConsoleHandler

java.util.logging.FileHandler.level = FINEST
java.util.logging.FileHandler.pattern = ${petals.home}/logs/petals.log
java.util.logging.FileHandler.formatter = org.ow2.petals.commons.logger.PetalsSimpleFormatter
java.util.logging.FileHandler.append = true

java.util.logging.ConsoleHandler.level = FINEST

##Petals level
Petals.level = FINEST

#Petals.PetalsAdminService.level = FINEST
#Petals.AutoLoaderService.level = FINEST
#Petals.ConfigurationService.level = FINEST

#Petals.Container.level = FINEST
#Petals.Container.ContainerService.level = FINEST
#Petals.Container.Components.level = FINEST

#Petals.Container.Lifecycle.level = FINEST
#Petals.Container.Lifecycle.ComponentLifeCycle.level = FINEST
#Petals.Container.Lifecycle.Installer.level = FINEST
#Petals.Container.Lifecycle.ServiceAssemblyLifeCycle.level = FINEST
#Petals.Container.Lifecycle.SharedLibraryLifeCycle.level = FINEST

#Petals.Communication.level = FINEST
#Petals.Communication.TopologyService.level = FINEST
#Petals.Communication.JNDIAgentService.level = FINEST
#Petals.Communication.JNDIService.level = FINEST
#Petals.Communication.JMXService.level = FINEST
#Petals.Communication.RMIConnector.level = FINEST
#Petals.Communication.RemoteCheckerClient.level = FINEST

#Petals.Tools.WebServiceManager.level = FINEST

#Petals.System.level = FINEST
#Petals.System.PersistenceService.level = FINEST
#Petals.System.LoaderManagerService.level = FINEST
#Petals.System.SystemStateService.level = FINEST
#Petals.System.RepositoryService.level = FINEST
#Petals.System.Artifact.FractalArtifactRepositoryService.level = FINEST

#Petals.JBI-Management.level = FINEST
#Petals.JBI-Management.AdminService.level = FINEST
#Petals.JBI-Management.SystemRecoveryService.level = FINEST
#Petals.JBI-Management.InstallationService.level = FINEST
#Petals.JBI-Management.ComponentInstallationService.level = FINEST
#Petals.JBI-Management.DeploymentService.level = FINEST
#Petals.JBI-Management.AtomicDeploymentService.level = FINEST
#Petals.JBI-Management.TransactionManager.level = FINEST

#Petals.JBI-Messaging.level = FINEST
#Petals.JBI-Messaging.RouterMonitorService.level = FINEST
#Petals.JBI-Messaging.RouterService.level = FINEST
#Petals.JBI-Messaging.FlowControllerModule.level = FINEST
#Petals.JBI-Messaging.FlowFilterModule.level = FINEST
#Petals.JBI-Messaging.PriorityOrdererModule.level = FINEST
#Petals.JBI-Messaging.TransportResolverModule.level = FINEST
#Petals.JBI-Messaging.AuthorizationModule.level = FINEST
#Petals.JBI-Messaging.EndpointResolverModule.level = FINEST
#Petals.JBI-Messaging.JAASAuthenticationModule.level = FINEST
#Petals.JBI-Messaging.PriorityOrdererModule.level = FINEST
#Petals.JBI-Messaging.EndpointRegistry.level = FINEST
#Petals.JBI-Messaging.JMXExchangeCheckerClient.level = FINEST

#Petals.JBI-Component.ComponentContext.level = FINEST

#Petals.Transporter.level = FINEST
#Petals.Transporter.LocalTransporter.level = FINEST
#Petals.Transporter.NioTransporter.level = FINEST
#Petals.Transporter.NioTransportProtocol.NioSelectorAgent.level = FINEST
#Petals.Transporter.NioTransportProtocol.NioServerAgent.level = FINEST
#Petals.Transporter.NioTransportProtocol.NioClientObjectPool.level = FINEST

#Petals.WS.level = FINEST
#Petals.WS.ArtifactRepositoryService.level = FINEST
#Petals.WS.DeploymentService.level = FINEST
#Petals.WS.DragonConnectionService.level = FINEST
#Petals.WS.EndpointService.level = FINEST
#Petals.WS.InformationService.level = FINEST
#Petals.WS.InstallationService.level = FINEST
#Petals.WS.JBIArtefactsService.level = FINEST
#Petals.WS.RuntimeService.level = FINEST
#Petals.WS.ServiceAssemblyStateService.level = FINEST
#Petals.WS.TopologyService.level = FINEST
{noformat}



[^loggers.properties]&nbsp;


h3. Default log4j.properties

The default *log4j.properties* is :
{noformat}# Set the options for the Console appender.
# Console's layout is a PatternLayout, using the conversion pattern
# %d: current date in ISO8601 format
# %p: priority of the logging event
# %c: category name
# %m: the message
log4j.appender.Console=org.apache.log4j.ConsoleAppender
log4j.appender.Console.layout=org.apache.log4j.PatternLayout
log4j.appender.Console.layout.ConversionPattern=%d %-5p %c{3} %m\n

# Root logger set to INFO using the Console appender defined above.
log4j.rootLogger=fatal,Console

######################
# Logger definitions #
######################

# CXF logger #
#log4j.logger.org.apache.cxf=fatal,Console
#log4j.additivity.org.apache.cxf=true

# Hibernate logger #
log4j.logger.org.hibernate=fatal,Console
log4j.additivity.org.hibernate=true

# Registry logger #
log4j.logger.org.ow2.petals.registry=fatal,Console
log4j.additivity.org.ow2.petals.registry=true{noformat}


[^log4j.properties]&nbsp;
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