org.support.project.aop.Intercepter Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of common Show documentation
Show all versions of common Show documentation
Common Library for support-project.org application
package org.support.project.aop;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;
import org.support.project.common.log.Log;
import org.support.project.common.log.LogFactory;
import org.support.project.ormapping.dao.AbstractDao;
import org.support.project.ormapping.transaction.Transaction;
import javassist.util.proxy.MethodHandler;
public class Intercepter implements InvocationHandler, MethodHandler {
/** ログ */
private static Log logger = LogFactory.getLog(Intercepter.class);
private Object target;
private Class intf;
public Intercepter(Class intf, final Object target) {
this.target = target;
this.intf = intf;
}
/**
* インタフェースの実行
*/
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
try {
Aspect aspect = intf.getAnnotation(Aspect.class);
if (aspect != null) {
// クラスにAspectが登録されていればそれを実行(そしてリターン)
Class adviceClass = aspect.advice();
Advice advice = adviceClass.newInstance();
Object ret = advice.invoke(target, method, args);
return ret;
}
aspect = method.getAnnotation(Aspect.class);
if (aspect != null) {
// メソッドにAspectが登録されていればそれを実行(そしてリターン)
Class adviceClass = aspect.advice();
Advice advice = adviceClass.newInstance();
Object ret = advice.invoke(target, method, args);
return ret;
}
Method intfMethod = getAnnotationMethod(method.getName(), method.getParameterTypes());
if (intfMethod != null) {
aspect = intfMethod.getAnnotation(Aspect.class);
if (aspect != null) {
Class adviceClass = aspect.advice();
Advice advice = adviceClass.newInstance();
Object ret = advice.invoke(target, method, args);
return ret;
}
}
// 何も登録されていない場合、通常処理
if (logger.isTraceEnabled()) {
logger.trace("[BEGIN] " + target.getClass() + " : " + method.getName());
}
// 実際のコードを呼び出し
Object ret = method.invoke(target, args);
if (logger.isTraceEnabled()) {
logger.trace("[END] " + target.getClass() + " : " + method.getName());
}
return ret;
} catch (Throwable e) {
if (logger.isDebugEnabled()) {
logger.debug("[ERROR] " + target.getClass() + " : " + method.getName() + " : " + e.getMessage());
}
throw e;
}
}
private Method getAnnotationMethod(String name, Class[] parameterTypes) {
Method m;
m = getMethod(intf, name, parameterTypes);
if (m != null) {
Aspect aspect = m.getAnnotation(Aspect.class);
if (aspect != null) {
return m;
}
}
m = getMethod(target.getClass(), name, parameterTypes);
if (m != null) {
Aspect aspect = m.getAnnotation(Aspect.class);
if (aspect != null) {
return m;
}
}
return null;
}
/**
* 実行するメソッドの検索
*
* @param clazz
* メソッドを検索するクラス
* @param methodName
* メソッド名
* @param parameterTypes
* メソッドの引数の型
* @return メソッド
*/
private Method getMethod(Class clazz, String methodName, Class[] parameterTypes) {
Method[] methods = clazz.getDeclaredMethods();
// boolean exist = false;
List list = new ArrayList();
for (Method method : methods) {
if (method.getName().equals(methodName)) {
list.add(method);
}
}
if (!list.isEmpty()) {
if (list.size() == 1) {
return list.get(0);
} else {
// Privateメソッドを取得する場合、getDeclaredMethodメソッドを使用します。
Method method;
try {
method = clazz.getDeclaredMethod(methodName, parameterTypes);
} catch (NoSuchMethodException | SecurityException e) {
// throw new SystemException(e);
return null;
}
return method;
}
} else {
// 親クラスに定義されていないか再帰的に検索
if (clazz.getSuperclass() != null) {
return getMethod(clazz.getSuperclass(), methodName, parameterTypes);
} else {
// throw new SystemException(new NoSuchMethodException("methodName"));
return null;
}
}
}
/**
* クラスの実行
*/
@Override
public Object invoke(Object proxy, Method method, Method proceed, Object[] args) throws Throwable {
try {
Aspect aspect = intf.getAnnotation(Aspect.class);
if (aspect != null) {
// クラスにAspectが登録されていればそれを実行(そしてリターン)
Class adviceClass = aspect.advice();
Advice advice = adviceClass.newInstance();
Object ret = advice.invoke(target, proceed, args);
return ret;
}
// proceedはContainerで取得してProxyでくるんだMethodなので、アノテーションが設定されることは無い
// aspect = proceed.getAnnotation(Aspect.class);
// if (aspect != null) {
// Class adviceClass = aspect.advice();
// Advice advice = adviceClass.newInstance();
// Object ret = advice.invoke(target, proceed, args);
// return ret;
// }
aspect = method.getAnnotation(Aspect.class);
if (aspect != null) {
Class adviceClass = aspect.advice();
Advice advice = adviceClass.newInstance();
Object ret = advice.invoke(target, proceed, args);
return ret;
}
// 何も登録されていないが、クラスがAbstractDaoを継承している場合
if (target instanceof AbstractDao) {
// NewTransactionが設定されていない場合、デフォルトでトランザクションを引き継ぐ
Advice advice = new Transaction();
Object ret = advice.invoke(target, proceed, args);
return ret;
}
// 何も登録されていない場合、通常処理
if (logger.isTraceEnabled()) {
logger.trace("[BEGIN] " + proxy.getClass() + " : " + method.getName());
}
// 実際のコードを呼び出し
Object ret = proceed.invoke(proxy, args);
// Object ret = method.invoke(proxy, args);
if (logger.isTraceEnabled()) {
logger.trace("[END] " + proxy.getClass() + " : " + method.getName());
}
return ret;
} catch (Throwable e) {
if (e instanceof InvocationTargetException) {
InvocationTargetException invocationTargetException = (InvocationTargetException) e;
Throwable throwable = invocationTargetException.getTargetException();
if (logger.isInfoEnabled()) {
StringBuilder builder = new StringBuilder();
builder.append("error. [object]").append(proxy.getClass().toString()).append("[proceed]").append(proceed.getName());
if (args != null) {
int count = 0;
for (Object param : args) {
builder.append("[param").append(count++).append("]").append(param);
}
}
builder.append("\n[throwable.getMessage()] ").append(throwable.getMessage());
logger.info(builder.toString());
}
throw throwable;
} else {
if (logger.isInfoEnabled()) {
logger.info("[ERROR] " + proxy.getClass() + " : " + method.getName() + " : " + e.getMessage());
if (e.getCause() != null) {
logger.info(" ", e.getCause());
}
}
}
throw e;
}
}
}
© 2015 - 2025 Weber Informatics LLC | Privacy Policy