public Object get(Object key) throws CacheException {
try {
return cache.getFromCache(toString(key), refreshPeriod, cron);
} catch (NeedsRefreshException e) {
cache.cancelUpdate(toString(key));
return null;
}
}
/** Clears out service methods cache by calling adminstrators flushAll */
protected void clearMethodCache() {
LOG.info("clearing spring method cache ...");
if (cacheAdminstrators != null) {
for (GeneralCacheAdministrator cache : cacheAdminstrators) {
cache.flushAll();
}
}
}
// 刷新所有缓存
public String flush() {
cacheManager.flushAll();
flushCache();
try {
ServletContext servletContext = ServletActionContext.getServletContext();
freemarkerManager.getConfiguration(servletContext).clearTemplateCache();
} catch (TemplateException e) {
e.printStackTrace();
}
return SUCCESS;
}
protected CacheManager(Configuration conf) {
Properties p = new Properties();
// use memory for caching
boolean cacheMemory = conf.getBoolean("cache.memory", false);
p.setProperty("cache.memory", Boolean.toString(cacheMemory));
// the persistence class used
String cachePersistenceClass =
conf.get("cache.persistence.class", "org.apache.nutch.cache.CustomDiskPersistenceListener");
p.setProperty("cache.persistence.class", cachePersistenceClass);
// where to store cache files (if file cache used)
String cachePath = conf.get("cache.path", ".");
p.setProperty("cache.path", cachePath);
// cacacity of cache (how many entries)
int cacheCapacity = conf.getInt("cache.capacity", 1000);
p.setProperty("cache.capacity", Integer.toString(cacheCapacity));
cacheadmin = new GeneralCacheAdministrator(p);
cache = cacheadmin.getCache();
}
public void destroy() throws CacheException {
cache.destroy();
}
public void clear() throws CacheException {
cache.flushAll();
}
public void remove(Object key) throws CacheException {
cache.flushEntry(toString(key));
}
public void put(Object key, Object value) throws CacheException {
cache.putInCache(toString(key), value);
}
public void setCacheCapacity(int cacheCapacity) {
cache.setCacheCapacity(cacheCapacity);
}