org.springframework.aop.interceptor

Class JamonPerformanceMonitorInterceptor

java.lang.Object

org.springframework.aop.interceptor.AbstractTraceInterceptor

org.springframework.aop.interceptor.AbstractMonitoringInterceptor

org.springframework.aop.interceptor.JamonPerformanceMonitorInterceptor

All Implemented Interfaces:

java.io.Serializable

public class JamonPerformanceMonitorInterceptor
extends AbstractMonitoringInterceptor

Performance monitor interceptor that uses JAMon library to perform the performance measurement on the intercepted method and output the stats. In addition, it tracks/counts exceptions thrown by the intercepted method. The stack traces can be viewed in the JAMon web application.

This code is inspired by Thierry Templier's blog.

Since:

1.1.3

Author:

Dmitriy Kopylenko, Juergen Hoeller, Rob Harrop, Steve Souza

See Also:

com.jamonapi.MonitorFactory, PerformanceMonitorInterceptor, Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
private boolean	trackAllInvocations

Fields inherited from class org.springframework.aop.interceptor.AbstractTraceInterceptor

defaultLogger

Constructor Summary

Constructors

Constructor and Description
JamonPerformanceMonitorInterceptor() Create a new JamonPerformanceMonitorInterceptor with a static logger.
JamonPerformanceMonitorInterceptor(boolean useDynamicLogger) Create a new JamonPerformanceMonitorInterceptor with a dynamic or static logger, according to the given flag.
JamonPerformanceMonitorInterceptor(boolean useDynamicLogger, boolean trackAllInvocations) Create a new JamonPerformanceMonitorInterceptor with a dynamic or static logger, according to the given flag.

Method Summary

Modifier and Type	Method and Description
protected java.lang.Object	invokeUnderTrace(MethodInvocation invocation, Log logger) Wraps the invocation with a JAMon Monitor and writes the current performance statistics to the log (if enabled).
protected boolean	isInterceptorEnabled(MethodInvocation invocation, Log logger) Always applies the interceptor if the "trackAllInvocations" flag has been set; else just kicks in if the log is enabled.
void	setTrackAllInvocations(boolean trackAllInvocations) Set whether to track all invocations that go through this interceptor, or just invocations with trace logging enabled.
protected void	trackException(MonKey key, java.lang.Throwable ex) Count the thrown exception and put the stack trace in the details portion of the key.

Methods inherited from class org.springframework.aop.interceptor.AbstractMonitoringInterceptor

createInvocationTraceName, getPrefix, getSuffix, setLogTargetClassInvocation, setPrefix, setSuffix

Methods inherited from class org.springframework.aop.interceptor.AbstractTraceInterceptor

getClassForLogging, getLoggerForInvocation, invoke, isLogEnabled, setHideProxyClassNames, setLoggerName, setUseDynamicLogger

Methods inherited from class java.lang.Object

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

Field Detail

trackAllInvocations

private boolean trackAllInvocations

Constructor Detail

JamonPerformanceMonitorInterceptor

public JamonPerformanceMonitorInterceptor()

Create a new JamonPerformanceMonitorInterceptor with a static logger.

JamonPerformanceMonitorInterceptor

public JamonPerformanceMonitorInterceptor(boolean useDynamicLogger)

Create a new JamonPerformanceMonitorInterceptor with a dynamic or static logger, according to the given flag.

Parameters:

useDynamicLogger - whether to use a dynamic logger or a static logger

See Also:

AbstractTraceInterceptor.setUseDynamicLogger(boolean)

JamonPerformanceMonitorInterceptor

public JamonPerformanceMonitorInterceptor(boolean useDynamicLogger,
                                          boolean trackAllInvocations)

Create a new JamonPerformanceMonitorInterceptor with a dynamic or static logger, according to the given flag.

Parameters:

useDynamicLogger - whether to use a dynamic logger or a static logger

trackAllInvocations - whether to track all invocations that go through this interceptor, or just invocations with trace logging enabled

See Also:

AbstractTraceInterceptor.setUseDynamicLogger(boolean)

Method Detail

setTrackAllInvocations

public void setTrackAllInvocations(boolean trackAllInvocations)

Set whether to track all invocations that go through this interceptor, or just invocations with trace logging enabled.

Default is "false": Only invocations with trace logging enabled will be monitored. Specify "true" to let JAMon track all invocations, gathering statistics even when trace logging is disabled.

isInterceptorEnabled

protected boolean isInterceptorEnabled(MethodInvocation invocation,
                                       Log logger)

Always applies the interceptor if the "trackAllInvocations" flag has been set; else just kicks in if the log is enabled.

Overrides:

isInterceptorEnabled in class AbstractTraceInterceptor

Parameters:

invocation - the MethodInvocation being traced

logger - the Log instance to check

See Also:

setTrackAllInvocations(boolean), AbstractTraceInterceptor.isLogEnabled(Log)

invokeUnderTrace

protected java.lang.Object invokeUnderTrace(MethodInvocation invocation,
                                            Log logger)
                                     throws java.lang.Throwable

Wraps the invocation with a JAMon Monitor and writes the current performance statistics to the log (if enabled).

Specified by:

invokeUnderTrace in class AbstractTraceInterceptor

logger - the Log to write trace messages to

Returns:

the result of the call to MethodInvocation.proceed()

Throws:

java.lang.Throwable - if the call to MethodInvocation.proceed() encountered any errors

See Also:

com.jamonapi.MonitorFactory#start, com.jamonapi.Monitor#stop

trackException

protected void trackException(MonKey key,
                              java.lang.Throwable ex)

Count the thrown exception and put the stack trace in the details portion of the key. This will allow the stack trace to be viewed in the JAMon web application.