本文整理匯總了Java中com.google.appengine.api.memcache.MemcacheService.getIdentifiable方法的典型用法代碼示例。如果您正苦於以下問題：Java MemcacheService.getIdentifiable方法的具體用法？Java MemcacheService.getIdentifiable怎麽用？Java MemcacheService.getIdentifiable使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類com.google.appengine.api.memcache.MemcacheService的用法示例。
在下文中一共展示了MemcacheService.getIdentifiable方法的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Java代碼示例。
示例1: doGet
import com.google.appengine.api.memcache.MemcacheService; //導入方法依賴的package包/類
@Override
public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException,
ServletException {
String path = req.getRequestURI();
if (path.startsWith("/favicon.ico")) {
return; // ignore the request for favicon.ico
}
String key = "count-concurrent";
// Using the synchronous cache.
MemcacheService syncCache = MemcacheServiceFactory.getMemcacheService();
// Write this value to cache using getIdentifiable and putIfUntouched.
for (long delayMs = 1; delayMs < 1000; delayMs *= 2) {
IdentifiableValue oldValue = syncCache.getIdentifiable(key);
byte[] newValue = oldValue == null
? BigInteger.valueOf(0).toByteArray()
: increment((byte[]) oldValue.getValue()); // newValue depends on old value
resp.setContentType("text/plain");
resp.getWriter().print("Value is " + new BigInteger(newValue).intValue() + "\n");
if (oldValue == null) {
// Key doesn't exist. We can safely put it in cache.
syncCache.put(key, newValue);
break;
} else if (syncCache.putIfUntouched(key, oldValue, newValue)) {
// newValue has been successfully put into cache.
break;
} else {
// Some other client changed the value since oldValue was retrieved.
// Wait a while before trying again, waiting longer on successive loops.
try {
Thread.sleep(delayMs);
} catch (InterruptedException e) {
throw new ServletException("Error when sleeping", e);
}
}
}
}