org.xmlBlaster.util.checkpoint
Class Checkpoint

java.lang.Object
  org.xmlBlaster.util.checkpoint.Checkpoint

All Implemented Interfaces:

CheckpointMBean, I_AdminPlugin, I_AdminService, I_AdminUsage, I_Checkpoint, I_Plugin

public class Checkpoint

extends java.lang.Object

implements I_Checkpoint

Plugin to trace the message flow into log files.

Currently there are 3 checkpoints defined inside the xmlBlaster core (see I_Checkpoint.java).
You can add a client property (e.g. "wfguid") to your PublishQos and register this here with filterClientPropertyKey="wfguid". When such a marked message passes one of the checkpoints a logging entry will be written to a log file (as configured in logging.properties). See logging.properties for examples on how to control which checkpoints are logged and if the complete message shall be dumped.

Is adjustable during runtime using JMX (jconsole)

Needs to be loaded in xmlBlasterPlugins.xml at run level 1:

  <plugin create='true' id='Checkpoint' className='org.xmlBlaster.util.checkpoint.Checkpoint'>
  <action do='LOAD' onStartupRunlevel='1' sequence='1'
  onFail='resource.configuration.pluginFailed'/>
  <action do='STOP' onShutdownRunlevel='0' sequence='1'/>
  <attribute id='filterClientPropertyKey'>wfguid</attribute>
  <attribute id='xmlStyle'>true</attribute>
  <attribute id='showAllMessages'>false</attribute>
  <attribute id='showAllClientProperties'>false</attribute>
  </plugin>
 

If showAllMessages is set to true all messages are logged and the filter is ignored.

A typical log entry looks like this:

 Oct 20, 2007 7:14:29 PM org.xmlBlaster.util.checkpoint.Checkpoint passingBy
  INFO: <cp>publish.ack</cp> <topicId>Hello</topicId> <wfguid>234345667777</wfguid> <sender>client/Publisher/1</sender>
 

or if you set xmlStyle to false like this:

 Oct 20, 2007 7:26:46 PM org.xmlBlaster.util.checkpoint.Checkpoint passingBy
  INFO: [cp=update.ack] [topicId=Hello] [wfguid=234345667777] [sender=client/Publisher/1] [destination=client/Subscribe/1]
 

You can extend this class and change the output style by overwriting the method append()

Author:

Marcel Ruff

See Also:

The admin.checkpoint requirement

Field Summary

protected ContextNode	contextNode
protected java.lang.String	filterClientPropertyKey If given will be used to filter which messages are logged
protected java.lang.String[]	filterKeys Is parsed from comma separated list of filterClientPropertyKey
protected java.util.logging.Logger[]	loggers
protected java.lang.Object	mbeanHandle My JMX registration
protected boolean	showAllClientProperties
protected boolean	showAllMessages If false show only messages marked by filterClientPropertyKey=wfguid
protected boolean	xmlStyle

Fields inherited from interface org.xmlBlaster.util.checkpoint.I_Checkpoint

CP_CONNECTION_PUBLISH_ACK, CP_NAMES, CP_PUBLISH_ACK, CP_UPDATE_ACK, CP_UPDATE_QUEUE_ADD

Constructor Summary

Checkpoint()

Method Summary

void	activate() Activate this service
protected void	append(java.lang.StringBuffer buf, java.lang.String key, java.lang.String value) Format the key/value output.
void	deActivate() Deactivate the service to standby.
java.lang.String	getCheckpointList() A comma separated list of checkpoints used
java.lang.String	getFilter()
java.lang.String	getType() The unique name of the plugin (together with the version).
java.lang.String	getUsageUrl()
java.lang.String	getVersion() The version of the plugin
void	init(Global glob, PluginInfo pluginInfo) This method is called by the PluginManager.
boolean	isActive() Access the current state
boolean	isShowAllClientProperties()
boolean	isShowAllMessages()
boolean	isShutdown() Check status
boolean	isXmlStyle()
void	passingBy(int checkpoint, MsgUnit msgUnit, SessionName destination, java.lang.String[] context) A message is passing a checkpoint.
void	setFilter(java.lang.String filterClientPropertyKey) A key (or a key-list) of a ClientProperty, only those messages containing such a ClientProperty are logged
void	setShowAllClientProperties(boolean showAllClientProperties)
void	setShowAllMessages(boolean showAllMessages)
void	setUsageUrl(java.lang.String url)
void	setXmlStyle(boolean xmlStyle)
void	shutdown() Cleans up the resource.
java.lang.String	usage()

Methods inherited from class java.lang.Object

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

Field Detail

loggers

protected java.util.logging.Logger[] loggers

mbeanHandle

protected java.lang.Object mbeanHandle

My JMX registration

contextNode

protected ContextNode contextNode

filterClientPropertyKey

protected java.lang.String filterClientPropertyKey

If given will be used to filter which messages are logged

filterKeys

protected java.lang.String[] filterKeys

Is parsed from comma separated list of filterClientPropertyKey

showAllClientProperties

protected boolean showAllClientProperties

showAllMessages

protected boolean showAllMessages

If false show only messages marked by filterClientPropertyKey=wfguid

xmlStyle

protected boolean xmlStyle

Constructor Detail

Checkpoint

public Checkpoint()

Method Detail

passingBy

public void passingBy(int checkpoint,
                      MsgUnit msgUnit,
                      SessionName destination,
                      java.lang.String[] context)

Description copied from interface: I_Checkpoint

A message is passing a checkpoint. Note: This method may never throw any exceptions

Specified by:

passingBy in interface I_Checkpoint

Parameters:

checkpoint - The checkpoint, e.g. CP_PUBLISH_ACK

destination - Can be null

msgUnit - The message processed

context - Additional key values like { "subscriptionId", "__suvbId:2349", "comment", "blabla" }

append

protected void append(java.lang.StringBuffer buf,
                      java.lang.String key,
                      java.lang.String value)

Format the key/value output. Default is xml style

Parameters:

buf -

key -

value -

init

public void init(Global glob,
                 PluginInfo pluginInfo)
          throws XmlBlasterException

Description copied from interface: I_Plugin

This method is called by the PluginManager.

Example how options are evaluated:

   // An entry in xmlBlaster.properties (in one line):
   MimeSubscribePlugin[ContentLenFilter][1.0]=\
                 org.xmlBlaster.engine.mime.demo.ContentLenFilter,\
                 DEFAULT_MAX_LEN=200,DEFAULT_MIN_LEN=20

  // Access it like this:
  java.util.Properties props = pluginInfo.getParameters();
  String maxLen = (String)props.get("DEFAULT_MAX_LEN");
  String throwLen = (String)props.get("THROW_EXCEPTION_FOR_LEN");
 

Specified by:

init in interface I_Plugin

Throws:

XmlBlasterException

getType

public java.lang.String getType()

Description copied from interface: I_AdminPlugin

The unique name of the plugin (together with the version).

Specified by:

getType in interface I_Plugin

getVersion

public java.lang.String getVersion()

Description copied from interface: I_AdminPlugin

The version of the plugin

Specified by:

getVersion in interface I_Plugin

shutdown

public void shutdown()
              throws XmlBlasterException

Description copied from interface: I_Plugin

Cleans up the resource.

Specified by:

shutdown in interface I_Plugin

Throws:

XmlBlasterException - if an exception occurs. The exception is handled by the RunLevelManager depending on how the plugin has been configured with the action:

<action do='STOP' onShutdownRunlevel='2' sequence='5' onFail='resource.configuration.pluginFailed'> If onFail is defined to something, the RunLevelManager will stop.

getCheckpointList

public java.lang.String getCheckpointList()

Description copied from interface: CheckpointMBean

A comma separated list of checkpoints used

Specified by:

getCheckpointList in interface CheckpointMBean

Returns:

"publish.ack,update.ack,update.queue.add"

activate

public void activate()
              throws java.lang.Exception

Description copied from interface: I_AdminService

Activate this service

Specified by:

activate in interface I_AdminService

Throws:

java.lang.Exception

deActivate

public void deActivate()

Description copied from interface: I_AdminService

Deactivate the service to standby. A call to activate() fires the service up again

Specified by:

deActivate in interface I_AdminService

isActive

public boolean isActive()

Description copied from interface: I_AdminService

Access the current state

Specified by:

isActive in interface I_AdminService

Returns:

true if active

isShutdown

public boolean isShutdown()

Description copied from interface: I_AdminPlugin

Check status

Specified by:

isShutdown in interface I_AdminPlugin

Returns:

true if down

getUsageUrl

public java.lang.String getUsageUrl()

Specified by:

getUsageUrl in interface I_AdminUsage

Returns:

A link on javadoc for JMX usage

setUsageUrl

public void setUsageUrl(java.lang.String url)

Specified by:

setUsageUrl in interface I_AdminUsage

usage

public java.lang.String usage()

Specified by:

usage in interface I_AdminUsage

Returns:

a human readable usage help string

isShowAllClientProperties

public boolean isShowAllClientProperties()

Specified by:

isShowAllClientProperties in interface CheckpointMBean

Returns:

the showAllClientProperties

setShowAllClientProperties

public void setShowAllClientProperties(boolean showAllClientProperties)

Specified by:

setShowAllClientProperties in interface CheckpointMBean

Parameters:

showAllClientProperties - the showAllClientProperties to set

isShowAllMessages

public boolean isShowAllMessages()

Specified by:

isShowAllMessages in interface CheckpointMBean

Returns:

If set to true the getFilter() is ignored

setShowAllMessages

public void setShowAllMessages(boolean showAllMessages)

Specified by:

setShowAllMessages in interface CheckpointMBean

Parameters:

showAllMessages - If set to true the getFilter() is ignored

getFilter

public java.lang.String getFilter()

Specified by:

getFilter in interface CheckpointMBean

Returns:

the filterClientPropertyKey

setFilter

public void setFilter(java.lang.String filterClientPropertyKey)

A key (or a key-list) of a ClientProperty, only those messages containing such a ClientProperty are logged

Specified by:

setFilter in interface CheckpointMBean

Parameters:

filterClientPropertyKey - A client property key like "wfguid" or a comma separated list of keys like "transId,wfguid,guid"

isXmlStyle

public boolean isXmlStyle()

Specified by:

isXmlStyle in interface CheckpointMBean

Returns:

the xmlStyle

setXmlStyle

public void setXmlStyle(boolean xmlStyle)

Specified by:

setXmlStyle in interface CheckpointMBean

Parameters:

xmlStyle - the xmlStyle to set