org.smallmind.persistence.cache.aop.ORMBasedCachedWithAspect Maven / Gradle / Ivy
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package org.smallmind.persistence.cache.aop;
import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.concurrent.ConcurrentHashMap;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.smallmind.nutsnbolts.lang.UnknownSwitchCaseException;
import org.smallmind.nutsnbolts.util.SingleItemIterable;
import org.smallmind.persistence.Durable;
import org.smallmind.persistence.cache.VectorKey;
import org.smallmind.persistence.cache.VectoredDao;
import org.smallmind.persistence.orm.ORMDao;
@Aspect
public class ORMBasedCachedWithAspect {
private static final ConcurrentHashMap METHOD_MAP = new ConcurrentHashMap();
@Around(value = "(execution(* persist (org.smallmind.persistence.Durable+)) || execution(@Persist * * (org.smallmind.persistence.Durable+))) && @within(CachedWith) && this(ormDao)", argNames = "thisJoinPoint, ormDao")
public Object aroundPersistMethod (ProceedingJoinPoint thisJoinPoint, ORMDao ormDao)
throws Throwable {
CachedWith cachedWith;
VectoredDao vectoredDao;
if (((vectoredDao = ormDao.getVectoredDao()) == null) || ((cachedWith = ormDao.getClass().getAnnotation(CachedWith.class)) == null)) {
return thisJoinPoint.proceed();
} else {
Durable durable;
if ((durable = (Durable)thisJoinPoint.proceed()) == null) {
return thisJoinPoint.proceed();
} else {
for (Update update : cachedWith.updates()) {
if (executeFilter(update.filter(), ormDao, durable)) {
OnPersist onPersist = executeOnPersist(update.onPersist(), ormDao, durable);
Iterable finderIterable = executeFinder(update.finder(), ormDao, durable);
for (Durable indexingDurable : finderIterable) {
Operand operand = executeProxy(update.proxy(), ormDao, indexingDurable);
switch (onPersist) {
case INSERT:
vectoredDao.updateInVector(new VectorKey(VectorCalculator.getVectorArtifact(update.value(), operand.getDurable()), ormDao.getManagedClass(), Classifications.get(CachedWith.class, null, update.value())), indexingDurable);
break;
case REMOVE:
vectoredDao.removeFromVector(new VectorKey(VectorCalculator.getVectorArtifact(update.value(), operand.getDurable()), ormDao.getManagedClass(), Classifications.get(CachedWith.class, null, update.value())), indexingDurable);
break;
default:
throw new UnknownSwitchCaseException(onPersist.name());
}
}
}
}
for (Invalidate invalidate : cachedWith.invalidates()) {
if (executeFilter(invalidate.filter(), ormDao, durable)) {
Iterable finderIterable = executeFinder(invalidate.finder(), ormDao, durable);
for (Durable indexingDurable : finderIterable) {
Operand operand = executeProxy(invalidate.proxy(), ormDao, indexingDurable);
vectoredDao.deleteVector(new VectorKey(VectorCalculator.getVectorArtifact(invalidate.value(), operand.getDurable()), ormDao.getManagedClass(), Classifications.get(CachedWith.class, null, invalidate.value())));
}
}
}
return durable;
}
}
}
@Around(value = "(execution(void delete (..)) || execution(@Delete * * (..))) && @within(CachedWith) && args(durable) && this(ormDao)", argNames = "thisJoinPoint, ormDao, durable")
public void aroundDeleteMethod (ProceedingJoinPoint thisJoinPoint, ORMDao ormDao, Durable durable)
throws Throwable {
CachedWith cachedWith;
VectoredDao vectoredDao;
if (((vectoredDao = ormDao.getVectoredDao()) == null) || ((cachedWith = ormDao.getClass().getAnnotation(CachedWith.class)) == null) || (durable == null)) {
thisJoinPoint.proceed();
} else {
thisJoinPoint.proceed();
for (Update update : cachedWith.updates()) {
if (executeFilter(update.filter(), ormDao, durable)) {
Iterable finderIterable = executeFinder(update.finder(), ormDao, durable);
for (Durable indexingDurable : finderIterable) {
Operand operand = executeProxy(update.proxy(), ormDao, indexingDurable);
vectoredDao.removeFromVector(new VectorKey(VectorCalculator.getVectorArtifact(update.value(), operand.getDurable()), ormDao.getManagedClass(), Classifications.get(CachedWith.class, null, update.value())), indexingDurable);
}
}
}
for (Invalidate invalidate : cachedWith.invalidates()) {
if (executeFilter(invalidate.filter(), ormDao, durable)) {
Iterable finderIterable = executeFinder(invalidate.finder(), ormDao, durable);
for (Durable indexingDurable : finderIterable) {
Operand operand = executeProxy(invalidate.proxy(), ormDao, indexingDurable);
vectoredDao.deleteVector(new VectorKey(VectorCalculator.getVectorArtifact(invalidate.value(), operand.getDurable()), ormDao.getManagedClass(), Classifications.get(CachedWith.class, null, invalidate.value())));
}
}
}
}
}
private boolean executeFilter (String filterMethodName, ORMDao ormDao, Durable durable) {
Method filterMethod;
if (filterMethodName.length() > 0) {
if ((filterMethod = locateMethod(ormDao, filterMethodName, ormDao.getManagedClass())) == null) {
throw new CacheAutomationError("The filter Method(%s) referenced within @CachedWith does not exist", filterMethodName);
}
if (!(filterMethod.getReturnType().equals(boolean.class) || filterMethod.getReturnType().equals(Boolean.class))) {
throw new CacheAutomationError("A filter Method(%s) referenced by @CachedWith must return a value of type 'boolean'", filterMethodName);
}
try {
return (Boolean)filterMethod.invoke(ormDao, durable);
} catch (Exception exception) {
throw new CacheAutomationError(exception);
}
}
return true;
}
private OnPersist executeOnPersist (String onPersistMethodName, ORMDao ormDao, Durable durable) {
Method onPersistMethod;
if (onPersistMethodName.length() > 0) {
if ((onPersistMethod = locateMethod(ormDao, onPersistMethodName, ormDao.getManagedClass())) == null) {
throw new CacheAutomationError("The onPersist Method(%s) referenced within @CachedWith does not exist", onPersistMethodName);
}
if (!onPersistMethod.getReturnType().equals(OnPersist.class)) {
throw new CacheAutomationError("An onPersist Method(%s) referenced by @CachedWith must return a value of type 'OnPersist'", onPersistMethodName);
}
try {
return (OnPersist)onPersistMethod.invoke(ormDao, durable);
} catch (Exception exception) {
throw new CacheAutomationError(exception);
}
}
return OnPersist.INSERT;
}
private Operand executeProxy (Proxy proxy, ORMDao ormDao, Durable durable) {
Method proxyMethod;
Class expectedType;
if ((proxy.method() == null) || (proxy.method().length() == 0)) {
return new Operand(ormDao.getManagedClass(), durable);
}
if ((proxyMethod = locateMethod(ormDao, proxy.method(), ormDao.getManagedClass())) == null) {
throw new CacheAutomationError("The proxy method(%s) does not exist", proxy.method());
}
if (!(expectedType = proxy.with().equals(Durable.class) ? durable.getClass() : proxy.with()).isAssignableFrom(proxyMethod.getReturnType())) {
throw new CacheAutomationError("The proxy method(%s) must return a %s type", proxy.method(), expectedType);
}
try {
return new Operand(expectedType, (Durable)proxyMethod.invoke(ormDao, durable));
} catch (Exception exception) {
throw new CacheAutomationError(exception);
}
}
private Iterable executeFinder (Finder finder, ORMDao ormDao, Durable durable) {
Method finderMethod;
Type finderReturnType;
Class expectedType;
if ((finder.method() == null) || (finder.method().length() == 0)) {
return new SingleItemIterable<>(durable);
}
if ((finderMethod = locateMethod(ormDao, finder.method(), ormDao.getManagedClass())) == null) {
throw new CacheAutomationError("The finder method(%s) does not exist", finder.method());
}
if ((expectedType = (finder.with().equals(Durable.class) ? durable.getClass() : finder.with())).isAssignableFrom(finderMethod.getReturnType())) {
try {
return new SingleItemIterable<>((Durable)finderMethod.invoke(ormDao, durable));
} catch (Exception exception) {
throw new CacheAutomationError(exception);
}
} else if (!Iterable.class.isAssignableFrom(finderMethod.getReturnType())) {
if ((!((finderReturnType = finderMethod.getGenericReturnType()) instanceof ParameterizedType)) || (!expectedType.isAssignableFrom((Class)((ParameterizedType)finderReturnType).getActualTypeArguments()[0]))) {
throw new CacheAutomationError("The finder method(%s) must return an Iterable parameterized to %s >", finder.method(), expectedType.getSimpleName(), expectedType.getSimpleName());
}
try {
return (Iterable)finderMethod.invoke(ormDao, durable);
} catch (Exception exception) {
throw new CacheAutomationError(exception);
}
} else {
throw new CacheAutomationError("The finder method(%s) must return either a %s type, or an Iterable parameterized to %s >", finder.method(), expectedType.getSimpleName(), expectedType.getSimpleName(), expectedType.getSimpleName());
}
}
private Method locateMethod (ORMDao ormDao, String methodName, Class parameterType) {
Method aspectMethod;
MethodKey methodKey;
Class[] parameterTypes;
if ((aspectMethod = METHOD_MAP.get(methodKey = new MethodKey(ormDao.getClass(), methodName))) == null) {
for (Method method : ormDao.getClass().getMethods()) {
if (method.getName().equals(methodName) && ((parameterTypes = method.getParameterTypes()).length == 1) && (parameterTypes[0].isAssignableFrom(parameterType))) {
METHOD_MAP.put(methodKey, aspectMethod = method);
break;
}
}
}
return aspectMethod;
}
public class Operand {
private Class managedClass;
private Durable durable;
private Operand (Class managedClass, Durable durable) {
this.managedClass = managedClass;
this.durable = durable;
}
public Class getManagedClass () {
return managedClass;
}
public Durable getDurable () {
return durable;
}
}
public class MethodKey {
private Class methodClass;
private String methodName;
private MethodKey (Class methodClass, String methodName) {
this.methodClass = methodClass;
this.methodName = methodName;
}
public Class getMethodClass () {
return methodClass;
}
public String getMethodName () {
return methodName;
}
@Override
public int hashCode () {
return methodClass.hashCode() ^ methodName.hashCode();
}
@Override
public boolean equals (Object obj) {
return (obj instanceof MethodKey) && methodClass.equals(((MethodKey)obj).getMethodClass()) && methodName.equals(((MethodKey)obj).getMethodName());
}
}
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