com.glaf.shiro.redis.ShiroRedisCache.java Source code

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Here is the source code for com.glaf.shiro.redis.ShiroRedisCache.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.glaf.shiro.redis;

import java.util.Collection;
import java.util.Set;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.shiro.cache.Cache;
import org.apache.shiro.cache.CacheException;

import com.glaf.core.util.SerializerUtils;
import com.glaf.shiro.Cacheable;

@SuppressWarnings("unchecked")
public class ShiroRedisCache<K, V> implements Cache<K, V> {
    protected final static Log logger = LogFactory.getLog(ShiroRedisCache.class);
    private String name;
    private Cacheable cacheable;

    public ShiroRedisCache(String name, Cacheable cacheable) {
        this.name = name;
        this.cacheable = cacheable;
    }

    @Override
    public void clear() throws CacheException {
        logger.debug("redis");
        try {
            cacheable.remove(getByteName());
        } catch (Throwable t) {
            throw new CacheException(t);
        }
    }

    @Override
    public V get(K key) throws CacheException {
        logger.debug("?keyRedis? key [" + key + "]");
        try {
            if (key == null) {
                return null;
            } else {
                V value = (V) cacheable.getHashCache(getByteName(), getByteKey(key));
                return value;
            }
        } catch (Throwable t) {
            throw new CacheException(t);
        }

    }

    /**
     * byte[]key
     * 
     * @param key
     * @return
     */
    private byte[] getByteKey(K key) {
        if (key instanceof String) {
            String preKey = key.toString();
            return preKey.getBytes();
        } else {
            return SerializerUtils.serialize(key);
        }
    }

    private byte[] getByteName() {
        return name.getBytes();
    }

    public Cacheable getCacheable() {
        return cacheable;
    }

    public String getName() {
        return name;
    }

    @Override
    public Set<K> keys() {
        try {
            Set<K> keys = cacheable.getHashKeys(getByteName());
            return keys;
        } catch (Throwable t) {
            throw new CacheException(t);
        }
    }

    @Override
    public V put(K key, V value) throws CacheException {
        logger.debug("?key key [" + key + "]");
        try {
            cacheable.updateHashCache(getByteName(), getByteKey(key), SerializerUtils.serialize(value), null);
            return value;
        } catch (Throwable t) {
            throw new CacheException(t);
        }
    }

    @Override
    public V remove(K key) throws CacheException {
        logger.debug("redis key [" + key + "]");
        try {
            V previous = get(key);
            cacheable.deleteHashCache(getByteName(), getByteKey(key));
            return previous;
        } catch (Throwable t) {
            throw new CacheException(t);
        }
    }

    public void setCacheable(Cacheable cacheable) {
        this.cacheable = cacheable;
    }

    public void setName(String name) {
        this.name = name;
    }

    @Override
    public int size() {
        try {
            Long longSize = new Long(cacheable.getHashSize(getByteName()));
            return longSize.intValue();
        } catch (Throwable t) {
            throw new CacheException(t);
        }
    }

    @Override
    public Collection<V> values() {
        try {
            Collection<V> values = cacheable.getHashValues(getByteName());
            return values;
        } catch (Throwable t) {
            throw new CacheException(t);
        }
    }

}