org.flite.cach3.aop.L2InvalidateSingleCacheAdvice.java Source code

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/*
 * Copyright (c) 2011-2013 Flite, Inc
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package org.flite.cach3.aop;

import org.apache.commons.lang.*;
import org.aspectj.lang.*;
import org.aspectj.lang.annotation.*;
import org.flite.cach3.annotations.*;
import org.slf4j.*;
import org.springframework.core.*;
import org.springframework.core.annotation.*;

import java.lang.reflect.*;
import java.security.*;
import java.util.*;

@Aspect
@Order((Ordered.HIGHEST_PRECEDENCE / 2) - 10)
public class L2InvalidateSingleCacheAdvice extends L2CacheBase {
    private static final Logger LOG = LoggerFactory.getLogger(L2InvalidateSingleCacheAdvice.class);

    @Pointcut("@annotation(org.flite.cach3.annotations.L2InvalidateSingleCache)")
    public void invalidateSingle() {
    }

    // For Invalidate*Cache, an AfterReturning aspect is fine. We will only apply our caching
    // after the underlying method completes successfully, and we will have the same
    // access to the method params.

    // This is injected caching.  If anything goes wrong in the caching, LOG the crap outta it,
    // but do not let it surface up past the AOP injection itself.

    @AfterReturning(pointcut = "invalidateSingle()", returning = "retVal")
    public Object cacheInvalidateSingle(final JoinPoint jp, final Object retVal) throws Throwable {
        try {
            doInvalidate(jp, retVal);
        } catch (Throwable ex) {
            if (LOG.isDebugEnabled()) {
                LOG.warn("Caching on " + jp.toShortString() + " aborted due to an error.", ex);
            } else {
                LOG.warn("Caching on " + jp.toShortString() + " aborted due to an error: " + ex.getMessage());
            }
        }
        return retVal;
    }

    //    @Pointcut("@annotation(org.flite.cach3.annotations.groups.InvalidateSingleCaches)")
    //    public void invalidateSingles() {
    //    }
    //
    //    @AfterReturning(pointcut = "invalidateSingles()", returning = "retVal")
    //    public Object cacheInvalidateSingles(final JoinPoint jp, final Object retVal) throws Throwable {
    //        try {
    //            doInvalidate(jp, retVal);
    //        } catch (Throwable ex) {
    //    if (LOG.isDebugEnabled()) {
    //        LOG.warn("Caching on " + jp.toShortString() + " aborted due to an error.", ex);
    //    } else {
    //        LOG.warn("Caching on " + jp.toShortString() + " aborted due to an error: " + ex.getMessage());
    //    }
    //        }
    //        return retVal;
    //    }

    private void doInvalidate(final JoinPoint jp, final Object retVal) throws Throwable {
        if (isCacheDisabled()) {
            LOG.debug("Caching is disabled.");
            return;
        }

        final Method methodToCache = getMethodToCache(jp);
        List<L2InvalidateSingleCache> lAnnotations;

        //        if (methodToCache.getAnnotation(InvalidateSingleCache.class) != null) {
        lAnnotations = Arrays.asList(methodToCache.getAnnotation(L2InvalidateSingleCache.class));
        //        } else {
        //            lAnnotations = Arrays.asList(methodToCache.getAnnotation(InvalidateSingleCaches.class).value());
        //        }

        for (int i = 0; i < lAnnotations.size(); i++) {
            // This is injected caching.  If anything goes wrong in the caching, LOG the crap outta it,
            // but do not let it surface up past the AOP injection itself.
            try {
                final AnnotationInfo info = getAnnotationInfo(lAnnotations.get(i), methodToCache.getName());
                final String baseKey = CacheBase.getBaseKey(info.getAsString(AType.KEY_TEMPLATE),
                        info.getAsInteger(AType.KEY_INDEX, null), retVal, jp.getArgs(), methodToCache.toString(),
                        factory, methodStore);
                final String cacheKey = buildCacheKey(baseKey, info.getAsString(AType.NAMESPACE),
                        info.getAsString(AType.KEY_PREFIX));

                LOG.debug("Invalidating cache for key " + cacheKey);
                getCache().invalidateBulk(Arrays.asList(cacheKey));
            } catch (Throwable ex) {
                if (LOG.isDebugEnabled()) {
                    LOG.warn("Caching on " + jp.toShortString() + " aborted due to an error.", ex);
                } else {
                    LOG.warn("Caching on " + jp.toShortString() + " aborted due to an error: " + ex.getMessage());
                }
            }
        }
    }

    /*default*/ static AnnotationInfo getAnnotationInfo(final L2InvalidateSingleCache annotation,
            final String targetMethodName) {
        final AnnotationInfo result = new AnnotationInfo();

        if (annotation == null) {
            throw new InvalidParameterException(
                    String.format("No annotation of type [%s] found.", L2InvalidateSingleCache.class.getName()));
        }

        final String namespace = annotation.namespace();
        if (AnnotationConstants.DEFAULT_STRING.equals(namespace) || namespace == null || namespace.length() < 1) {
            throw new InvalidParameterException(
                    String.format("Namespace for annotation [%s] must be defined on [%s]",
                            L2InvalidateSingleCache.class.getName(), targetMethodName));
        }
        result.add(new AType.Namespace(namespace));

        final String keyPrefix = annotation.keyPrefix();
        if (!AnnotationConstants.DEFAULT_STRING.equals(keyPrefix)) {
            if (StringUtils.isBlank(keyPrefix)) {
                throw new InvalidParameterException(String.format(
                        "KeyPrefix for annotation [%s] must not be defined as an empty string on [%s]",
                        L2InvalidateSingleCache.class.getName(), targetMethodName));
            }
            result.add(new AType.KeyPrefix(keyPrefix));
        }

        final Integer keyIndex = annotation.keyIndex();
        if (keyIndex != AnnotationConstants.DEFAULT_KEY_INDEX && keyIndex < -1) {
            throw new InvalidParameterException(
                    String.format("KeyIndex for annotation [%s] must be -1 or greater on [%s]",
                            L2InvalidateSingleCache.class.getName(), targetMethodName));
        }
        final boolean keyIndexDefined = keyIndex >= -1;

        final String keyTemplate = annotation.keyTemplate();
        if (StringUtils.isBlank(keyTemplate)) {
            throw new InvalidParameterException(
                    String.format("KeyTemplate for annotation [%s] must not be defined as an empty string on [%s]",
                            L2InvalidateSingleCache.class.getName(), targetMethodName));
        }
        final boolean keyTemplateDefined = !AnnotationConstants.DEFAULT_STRING.equals(keyTemplate);

        if (keyIndexDefined == keyTemplateDefined) {
            throw new InvalidParameterException(String.format(
                    "Exactly one of [keyIndex,keyTemplate] must be defined for annotation [%s] on [%s]",
                    L2InvalidateSingleCache.class.getName(), targetMethodName));
        }

        if (keyIndexDefined) {
            result.add(new AType.KeyIndex(keyIndex));
        }

        if (keyTemplateDefined) {
            result.add(new AType.KeyTemplate(keyTemplate));
        }

        return result;
    }

}