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## org.springframework.aop.interceptor
Class SimpleTraceInterceptor

    java.lang.Object
      org.springframework.aop.interceptor.AbstractTraceInterceptor
          org.springframework.aop.interceptor.SimpleTraceInterceptor

All Implemented Interfaces:
  Serializable, Advice, Interceptor, MethodInterceptor

Direct Known Subclasses:
  DebugInterceptor

    public class SimpleTraceInterceptor

extends AbstractTraceInterceptor

Simple AOP Alliance `MethodInterceptor` that can be introduced in a chain to display verbose trace information about intercepted method invocations, with method entry and method exit info.

Consider using `CustomizableTraceInterceptor` for more advanced needs.

Since:
  1.2
Author:
  Dmitriy Kopylenko, Juergen Hoeller
See Also:
  `CustomizableTraceInterceptor`, Serialized Form

Field Summary

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

Constructor Summary
`SimpleTraceInterceptor()` Create a new SimpleTraceInterceptor with a static logger.
`SimpleTraceInterceptor(boolean useDynamicLogger)` Create a new SimpleTraceInterceptor with dynamic or static logger, according to the given flag.

Method Summary
`protected String` | `getInvocationDescription(MethodInvocation invocation)` Return a description for the given method invocation.
`protected Object` | `invokeUnderTrace(MethodInvocation invocation, Log logger)` Subclasses must override this method to perform any tracing around the supplied `MethodInvocation`.

Methods inherited from class org.springframework.aop.interceptor.AbstractTraceInterceptor
`getClassForLogging, getLoggerForInvocation, invoke, isInterceptorEnabled, isLogEnabled, setHideProxyClassNames, setLoggerName, setUseDynamicLogger`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### SimpleTraceInterceptor

    public SimpleTraceInterceptor()

  Create a new SimpleTraceInterceptor with a static logger.

### SimpleTraceInterceptor

    public SimpleTraceInterceptor(boolean useDynamicLogger)

  Create a new SimpleTraceInterceptor with 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)`

Method Detail

### invokeUnderTrace

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

  Description copied from class: `AbstractTraceInterceptor`
  Subclasses must override this method to perform any tracing around the supplied `MethodInvocation`. Subclasses are responsible for ensuring that the `MethodInvocation` actually executes by calling `MethodInvocation.proceed()`.

  By default, the passed-in `Log` instance will have log level "trace" enabled. Subclasses do not have to check for this again, unless they overwrite the `isInterceptorEnabled` method to modify the default behavior.

  Specified by:
    `invokeUnderTrace` in class `AbstractTraceInterceptor`
    `logger` - the `Log` to write trace messages to
  Returns:
    the result of the call to `MethodInvocation.proceed()`
  Throws:
    `Throwable` - if the call to `MethodInvocation.proceed()` encountered any errors
  See Also:
    `AbstractTraceInterceptor.isInterceptorEnabled(org.aopalliance.intercept.MethodInvocation, org.apache.commons.logging.Log)`, `AbstractTraceInterceptor.isLogEnabled(org.apache.commons.logging.Log)`

### getInvocationDescription

    protected String getInvocationDescription(MethodInvocation invocation)

  Return a description for the given method invocation.

  Parameters:
    `invocation` - the invocation to describe
  Returns:
    the description

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