atg.service.perfmonitor
Class PerformanceMonitor

java.lang.Object
  atg.nucleus.logging.VariableArgumentApplicationLoggingImpl
      atg.nucleus.GenericService
          atg.nucleus.TimedOperationService
              atg.nucleus.servlet.ServletService
                  atg.nucleus.servlet.HttpServletService
                      atg.servlet.DynamoServlet
                          atg.service.perfmonitor.PerformanceMonitor

All Implemented Interfaces:

NameContextBindingListener, NameContextElement, NameResolver, AdminableService, ApplicationLogging, atg.nucleus.logging.ApplicationLoggingSender, atg.nucleus.logging.TraceApplicationLogging, VariableArgumentApplicationLogging, ComponentNameResolver, Service, ServiceListener, ParameterServlet, java.util.EventListener, javax.servlet.Servlet

public class PerformanceMonitor
extends DynamoServlet

The Performance Monitor servlet is responsible for gathering two types of performance data from different operations which occur in the server.

The first type of data which it gathers are the current execution stacks of all running threads. This allows users to see what operations a thread is currently doing.

The second type of data which is gathered is the time based performance data for an operation. This data is count, average, min, max, and total execution time for each operation. This also keeps track of parameters on the operations. These parameters are the objects which these operations are working on. The above stats are also kept for each parameter.

In order to use the performance monitor in your code, all you need to do is import atg.service.perfmonitor.* and add the following code snippets to your code. private final String RENDER_JHTML = "Render JHTML page"; private final String EXECUTE_SQL = "Execute SQL Query"; private String mPageName = "page.jhtml"; private String mSQLQuery = "select * from table"; PerformanceMonitor.startOperation(RENDER_JHTML, mPageName); ... source code to start render PerformanceMonitor.startOperation(EXECUTE_SQL, mSQLQuery); ... source code to read from table 1 in database PerformanceMonitor.startOperation(); ... source code to read from database PerformanceMonitor.endOperation(); ... more source code to read from table 1 in database PerformanceMonitor.endOperation(); ... more source code to finish render PerformanceMonitor.endOperation();

Field Summary

static java.lang.String	CLASS_VERSION
static int	DISABLED DISABLED mode turns the performance monitor off
static int	MEMORY MEMORY mode runs the performance monitor with stack tracking, operation timestamping, and memory tracking on
static int	NORMAL NORMAL mode runs the performance monitor with only stack tracking on
static int	TIME TIME mode runs the performance monitor with stack tracking and operation timestamping on

Fields inherited from class atg.servlet.DynamoServlet

mAllowCleanupRequest, mParameters

Fields inherited from class atg.nucleus.servlet.ServletService

SERVLET_INFO_KEY

Fields inherited from class atg.nucleus.GenericService

SERVICE_INFO_KEY

Fields inherited from interface atg.nucleus.logging.TraceApplicationLogging

DEFAULT_LOG_TRACE_STATUS

Fields inherited from interface atg.nucleus.logging.ApplicationLogging

DEFAULT_LOG_DEBUG_STATUS, DEFAULT_LOG_ERROR_STATUS, DEFAULT_LOG_INFO_STATUS, DEFAULT_LOG_WARNING_STATUS

Constructor Summary

PerformanceMonitor()
Constructs a null Template.

Method Summary

static void	cancelOperation(java.lang.String pOpName) Cancels an operation
static void	cancelOperation(java.lang.String pOpName, java.lang.String pParameter) Cancels an operation and supplies a parameter
protected void	cancelOperationInternal(java.lang.String pOpName, java.lang.String pParameter) The cancelOperation which does the work for the performance monitor.
protected void	cleanMemoryPerformanceData() This method resets the memory data from the PerformanceData objects in the mPerformanceHash table.
protected void	cleanPerformanceStructure() This method cleans out the mPerformanceHash table so that there are no PerformanceHashTables in it and no PerformanceData objects within that table.
protected void	cleanStackStructure() This method cleans out the mThreadStackHash table so that there are no Stack objects in it and no PerformanceStackData objects within that object.
protected void	cleanThreadStack(java.lang.Thread pThread) This method cleans out the Stack in the mThreadStackHash table for the given thread so there are no PerformanceStackData objects within that object.
void	doStartService() This is called after a Service has been created, placed into the naming hierarchy, and initialized with its configured property values.
void	doStopService() This is called when a Service is required to shut down.
static void	endOperation() Marks the end of the most recent operation in the code for which monitoring has been started, but not yet ended.
static void	endOperation(java.lang.String pOpName) Marks the end of an operation in the code
static void	endOperation(java.lang.String pOpName, java.lang.String pParameter) Marks the end of an operation in the code and supplies a parameter
static void	endOperation(java.lang.String pOpName, java.lang.String pParameter, ApplicationLogging pLogger) Marks the end of an operation in the code and supplies a parameter.
protected void	endOperationInternal(java.lang.String pOpName, java.lang.String pParameter) The endOperation which does the work for the performance monitor.
java.lang.Thread[]	getExcludedThreads() Returns property excludedThreads
java.lang.String[]	getExcludeServers() Returns property excludeServers
boolean	getIncludeNestedOperations() Returns property includeNestedOperations
int	getInitialPerformanceDataPoolSize() Returns property initialPerformanceDataPoolSize
int	getInitialStackDataPoolSize() Returns property initialStackDataPoolSize
int	getInitialStackPoolSize() Returns property initialStackPoolSize
int	getMode() Returns property mode
java.util.Hashtable	getPerformanceHash() Returns property performanceHash
static PerformanceMonitor	getPerformanceMonitor() Returns the global PerformanceMonitor object
java.util.Hashtable	getThreadStackHash() Returns property threadStackHash
boolean	getVerbose() Returns property verbose
boolean	handleReset(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse res) This method handles the reset data button on the performance monitor page.
static boolean	isEnabled() Returns whether the perf monitor is enabled or not
protected boolean	isExcludedThread(java.lang.Thread pThread) This method determines if the given thread is in the excludedThreads list.
void	resetPerformanceData() Resets all the time performance data back to 0
protected void	setExcludedThreads(java.lang.Thread[] pExcludedThreads) Sets property excludedThreads
void	setExcludeServers(java.lang.String[] pExcludeServers) Sets property excludeServers
void	setIncludeNestedOperations(boolean pIncludeNestedOperations) Sets property includeNestedOperations
void	setInitialPerformanceDataPoolSize(int pInitialPerformanceDataPoolSize) Sets property initialPerformanceDataPoolSize
void	setInitialStackDataPoolSize(int pInitialStackDataPoolSize) Sets property initialStackDataPoolSize
void	setInitialStackPoolSize(int pInitialStackPoolSize) Sets property initialStackPoolSize
void	setMode(int pMode) Sets property mode
protected void	setupExcludeServers() This method takes the mExcludeServers list and adds all the threads from that component to the mExcludedThreads list.
void	setVerbose(boolean pVerbose) Sets property verbose
static void	startOperation(java.lang.String pOpName) Marks the beginning of an operation in the code
static void	startOperation(java.lang.String pOpName, java.lang.String pParameter) Marks the beginning of an operation in the code and supplies a parameter
protected void	startOperationInternal(java.lang.String pOpName, java.lang.String pParameter) The startOperation which does the work for the performance monitor.

Methods inherited from class atg.servlet.DynamoServlet

doDelete, doGet, doPost, doPut, getParameter, getParameters, getServletContext, service, service, service, setParameter

Methods inherited from class atg.nucleus.servlet.ServletService

destroy, getServletConfig, getServletInfo, init, setServletInfo

Methods inherited from class atg.nucleus.TimedOperationService

getAverageRequestHandlingTime, getHandledRequestCount, getRequestStartTime, getTotalRequestHandlingTime, isKeepingStatistics, notifyHandledRequest, resetStatistics, setKeepingStatistics

Methods inherited from class atg.nucleus.GenericService

addLogListener, createAdminServlet, getAbsoluteName, getAdminServlet, getLoggingForVlogging, getLogListenerCount, getLogListeners, getName, getNameContext, getNucleus, getRoot, getServiceConfiguration, getServiceInfo, isLoggingDebug, isLoggingError, isLoggingInfo, isLoggingTrace, isLoggingWarning, isRunning, logDebug, logDebug, logDebug, logError, logError, logError, logInfo, logInfo, logInfo, logTrace, logTrace, logTrace, logWarning, logWarning, logWarning, nameContextElementBound, nameContextElementUnbound, removeLogListener, reResolveThis, resolveName, resolveName, resolveName, resolveName, sendLogEvent, setLoggingDebug, setLoggingError, setLoggingInfo, setLoggingTrace, setLoggingWarning, setNucleus, setServiceInfo, startService, stopService

Methods inherited from class atg.nucleus.logging.VariableArgumentApplicationLoggingImpl

vlogDebug, vlogDebug, vlogDebug, vlogDebug, vlogError, vlogError, vlogError, vlogError, vlogInfo, vlogInfo, vlogInfo, vlogInfo, vlogTrace, vlogTrace, vlogTrace, vlogTrace, vlogWarning, vlogWarning, vlogWarning, vlogWarning

Methods inherited from class java.lang.Object

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

Field Detail

CLASS_VERSION

public static java.lang.String CLASS_VERSION

DISABLED

public static final int DISABLED

DISABLED mode turns the performance monitor off

See Also:

Constant Field Values

NORMAL

public static final int NORMAL

NORMAL mode runs the performance monitor with only stack tracking on

See Also:

Constant Field Values

TIME

public static final int TIME

TIME mode runs the performance monitor with stack tracking and operation timestamping on

See Also:

Constant Field Values

MEMORY

public static final int MEMORY

MEMORY mode runs the performance monitor with stack tracking, operation timestamping, and memory tracking on

See Also:

Constant Field Values

Constructor Detail

PerformanceMonitor

public PerformanceMonitor()

Constructs a null Template.

Method Detail

resetPerformanceData

public void resetPerformanceData()

Resets all the time performance data back to 0

startOperationInternal

protected void startOperationInternal(java.lang.String pOpName,
                                      java.lang.String pParameter)

The startOperation which does the work for the performance monitor. When a new operation is started, the current thread is used as a key and a Stack is allocated to be used for storing the PerformanceStackData objects for this thread. The stack is stored in the mThreadStackHash hashtable.

Starting an operation entails allocating a new Stack object if it does not exist and then pushing a PerformanceStackData object populated with the supplied data onto the stack and setting the start time.

Parameters:

pOpName - the name of the operation

pParameter - the object or name of object which this operation is working on

endOperationInternal

protected void endOperationInternal(java.lang.String pOpName,
                                    java.lang.String pParameter)
                             throws PerfStackMismatchException

The endOperation which does the work for the performance monitor. The Stack is retrieved from the mThreadStackHash table and the top operation in the stack is popped off. If this is TIME mode then the execution time is determined and stats calculated and added to the mPerformanceHash table.

Ending an operation entails getting the PerformanceStackData object from the top of the stack, comparing it for stack mismatch, getting the execution time for the operation and setting some stats based on that information.

Parameters:

pOpName - the name of the operation; if null, then no stack mismatch check takes place.

pParameter - the object or name of object which this operation is working on

Throws:

PerfStackMismatchException - if the arguments do not match the operation in the top of the stack

cancelOperationInternal

protected void cancelOperationInternal(java.lang.String pOpName,
                                       java.lang.String pParameter)
                                throws PerfStackMismatchException

The cancelOperation which does the work for the performance monitor. This method exists for the case when operations do not complete successfully and the developer does not want this instance of performance data to be used in calculating stats.

Parameters:

pOpName - the name of the operation

pParameter - the object or name of object which this operation is working on

Throws:

PerfStackMismatchException - if the arguments do not match the operation in the top of the stack

cleanThreadStack

protected void cleanThreadStack(java.lang.Thread pThread)

This method cleans out the Stack in the mThreadStackHash table for the given thread so there are no PerformanceStackData objects within that object. The PerformanceStackData objects are returned to their pools and the Stack object is removed from the table.

cleanStackStructure

protected void cleanStackStructure()

This method cleans out the mThreadStackHash table so that there are no Stack objects in it and no PerformanceStackData objects within that object. The PerformanceStackData objects are returned to their pools.

cleanPerformanceStructure

protected void cleanPerformanceStructure()

This method cleans out the mPerformanceHash table so that there are no PerformanceHashTables in it and no PerformanceData objects within that table. The PerformanceData objects are returned to their pools.

cleanMemoryPerformanceData

protected void cleanMemoryPerformanceData()

This method resets the memory data from the PerformanceData objects in the mPerformanceHash table.

setupExcludeServers

protected void setupExcludeServers()

This method takes the mExcludeServers list and adds all the threads from that component to the mExcludedThreads list.

isExcludedThread

protected boolean isExcludedThread(java.lang.Thread pThread)

This method determines if the given thread is in the excludedThreads list. If so, the thread will not be used to record performance data.

Parameters:

pThread - the thread to search for in the excludedThreads list

setMode

public void setMode(int pMode)

Sets property mode

getMode

public int getMode()

Returns property mode

setVerbose

public void setVerbose(boolean pVerbose)

Sets property verbose

getVerbose

public boolean getVerbose()

Returns property verbose

setIncludeNestedOperations

public void setIncludeNestedOperations(boolean pIncludeNestedOperations)

Sets property includeNestedOperations

getIncludeNestedOperations

public boolean getIncludeNestedOperations()

Returns property includeNestedOperations

setExcludeServers

public void setExcludeServers(java.lang.String[] pExcludeServers)

Sets property excludeServers

getExcludeServers

public java.lang.String[] getExcludeServers()

Returns property excludeServers

setExcludedThreads

protected void setExcludedThreads(java.lang.Thread[] pExcludedThreads)

Sets property excludedThreads

getExcludedThreads

public java.lang.Thread[] getExcludedThreads()

Returns property excludedThreads

setInitialStackDataPoolSize

public void setInitialStackDataPoolSize(int pInitialStackDataPoolSize)

Sets property initialStackDataPoolSize

getInitialStackDataPoolSize

public int getInitialStackDataPoolSize()

Returns property initialStackDataPoolSize

setInitialPerformanceDataPoolSize

public void setInitialPerformanceDataPoolSize(int pInitialPerformanceDataPoolSize)

Sets property initialPerformanceDataPoolSize

getInitialPerformanceDataPoolSize

public int getInitialPerformanceDataPoolSize()

Returns property initialPerformanceDataPoolSize

setInitialStackPoolSize

public void setInitialStackPoolSize(int pInitialStackPoolSize)

Sets property initialStackPoolSize

getInitialStackPoolSize

public int getInitialStackPoolSize()

Returns property initialStackPoolSize

getThreadStackHash

public java.util.Hashtable getThreadStackHash()

Returns property threadStackHash

getPerformanceHash

public java.util.Hashtable getPerformanceHash()

Returns property performanceHash

getPerformanceMonitor

public static final PerformanceMonitor getPerformanceMonitor()

Returns the global PerformanceMonitor object

startOperation

public static final void startOperation(java.lang.String pOpName)

Marks the beginning of an operation in the code

Parameters:

pOpName - the name of the operation which begins in the code

startOperation

public static final void startOperation(java.lang.String pOpName,
                                        java.lang.String pParameter)

Marks the beginning of an operation in the code and supplies a parameter

Parameters:

pOpName - the name of the operation which begins in the code

pParameter - the object or name of the object which the operation is executing on

endOperation

public static final void endOperation()

Marks the end of the most recent operation in the code for which monitoring has been started, but not yet ended.

endOperation

public static final void endOperation(java.lang.String pOpName)
                               throws PerfStackMismatchException

Marks the end of an operation in the code

Parameters:

pOpName - the name of the operation which has completed in the code

Throws:

PerfStackMismatchException - if this call is called out of order in relation to the other endOperation calls.

endOperation

public static final void endOperation(java.lang.String pOpName,
                                      java.lang.String pParameter)
                               throws PerfStackMismatchException

Marks the end of an operation in the code and supplies a parameter

Parameters:

pOpName - the name of the operation which has completed in the code

pParameter - the object or name of the object which the operation has completed executing on

Throws:

PerfStackMismatchException - if this call is called out of order in relation to the other endOperation calls.

endOperation

public static final void endOperation(java.lang.String pOpName,
                                      java.lang.String pParameter,
                                      ApplicationLogging pLogger)

Marks the end of an operation in the code and supplies a parameter. This version does not throw a PerfStackException, but instead takes an ApplicationLogging to log an error if one occurs. You can pass null here to avoid all error checking.

Parameters:

pOpName - the name of the operation which has completed in the code

pParameter - the object or name of the object which the operation has completed executing on

Throws:

PerfStackMismatchException - if this call is called out of order in relation to the other endOperation calls.

cancelOperation

public static final void cancelOperation(java.lang.String pOpName)
                                  throws PerfStackMismatchException

Cancels an operation

Parameters:

pOpName - the name of the operation which is to be cancelled

Throws:

PerfStackMismatchException - if this call is called out of order in relation to the other endOperation calls.

cancelOperation

public static final void cancelOperation(java.lang.String pOpName,
                                         java.lang.String pParameter)
                                  throws PerfStackMismatchException

Cancels an operation and supplies a parameter

Parameters:

pOpName - the name of the operation which is to be cancelled

pParameter - the object or name of the object which the operation is to be cancelled on

Throws:

PerfStackMismatchException - if this call is called out of order in relation to the other endOperation calls.

isEnabled

public static final boolean isEnabled()

Returns whether the perf monitor is enabled or not

Returns:

whether the performance monitor is enabled or not

doStartService

public void doStartService()
                    throws ServiceException

Description copied from class: GenericService

This is called after a Service has been created, placed into the naming hierarchy, and initialized with its configured property values. The Service should override this method to start any processes it requires.

Overrides:

doStartService in class GenericService

Throws:

ServiceException - if the Service had a problem starting up

doStopService

public void doStopService()
                   throws ServiceException

Description copied from class: GenericService

This is called when a Service is required to shut down. The Service should respond by stopping any processes that it has started.

Overrides:

doStopService in class GenericService

Throws:

ServiceException - if the Service had a problem shutting down

handleReset

public boolean handleReset(javax.servlet.http.HttpServletRequest req,
                           javax.servlet.http.HttpServletResponse res)

This method handles the reset data button on the performance monitor page.

Parameters:

req - the request to be processed

res - the response object for this request