AOP and Spring

Logging aspects and Spring.

Add this to your applicationContext.xml file.

service,logic,integration loggingAdvice

This will cause the three beans, service, logic and integration to be logged. This will cause the "bean" loggingAdvice to be exposed in the JMX console with the name TestLogging This will expose the property enabled to the JMX console, set that to true and the aop starts to log.

Below is the complete Logging advice class.

package com.aja; import org.springframework.aop.AfterReturningAdvice; import org.springframework.aop.MethodBeforeAdvice; import org.springframework.aop.ThrowsAdvice; import com.ericsson.sdp.media.eup.charging.error.ErrorHandler; import java.lang.reflect.Method; /** * Logging interceptor. */ public class LoggingAdvice implements MethodBeforeAdvice, AfterReturningAdvice, ThrowsAdvice { private boolean enabled = true; /** * Transcodeeates a new instance of LoggingAdvice. */ public LoggingAdvice() { } /* (non-Javadoc) * @see org.springframework.aop.MethodBeforeAdvice#before(java.lang.reflect.Method, java.lang.Object[], java.lang.Object) */ public void before(Method method, Object[] args, Object target) throws Throwable { if (!enabled) { return; } StringBuffer builder = new StringBuffer(); builder.append("enter ").append(method.getName()).append("("); for (int i = 0; args == null?false:(i < args.length); i++) { builder.append(args[i]); if (i < (args.length - 1)) { builder.append(", "); } } builder.append(")"); ErrorHandler.handleDebug(builder.toString()); } /* (non-Javadoc) * @see org.springframework.aop.AfterReturningAdvice#afterReturning(java.lang.Object, java.lang.reflect.Method, java.lang.Object[], java.lang.Object) */ public void afterReturning(Object returnValue, Method method, Object[] args, Object target) throws Throwable { if (!enabled) { return; } ErrorHandler.handleDebug(RETURN + method.getName()); } /** * @param method * @param args * @param target * @param exc */ public void afterThrowing(Method method, Object[] args, Object target, Throwable exc) { if (!enabled) { return; } ErrorHandler.handleDebug("return " + method.getName() + exc.getMessage()); } /** * @return the enabled */ public boolean isEnabled() { return enabled; } /** * @param enabled the enabled to set */ public void setEnabled(boolean enabled) { this.enabled = enabled; } }