异步方式调用同步方法
系统中同步方法很多，当串行时响应时间会比较长，有些调用可以异步来做，当需要结果时只要有就行。如果调用的方法本身就是异步的这个还好。但是因为很多方法都是同步实现的，所以急需要一种框架或者工具来实现同步方法的异步调用，我搜索了下没找到比较好的解决方案，不过也有一些可供参考的，这里总结下：
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1：NET Framework提供的异步调用同步方法
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http://msdn.microsoft.com/zh-cn/library/2e08f6yc(v=vs.80).aspx
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截取API使用方式如下：
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// Create the delegate.AsyncMethodCaller caller = new AsyncMethodCaller(ad.TestMethod); // Initiate the asychronous call.IAsyncResult result = caller.BeginInvoke(3000, out threadId, null, null);string returnValue = caller.EndInvoke(out threadId, result);?
ad.TestMethod ?就是需要异步调用的同步方法，可惜java没有这么简洁优美的语法。
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2：目前找到的实现异步调用的java框架 ?asyn4j
http://code.google.com/p/asyn4j/
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国人原创的，api还可以，还不支持future模式，但是支持也很简单。
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3：spring 3.0提供的任务调度
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http://static.springsource.org/spring/docs/3.0.5.RELEASE/reference/scheduling.html
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API使用例子：
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simplest case, the annotation may be applied to a void-returning method.@Asyncvoid doSomething() { // this will be executed asynchronously}Unlike the methods annotated with the @Scheduled annotation, these methods can expect arguments, because they will be invoked in the "normal" way by callers at runtime rather than from a scheduled task being managed by the container. For example, the following is a legitimate application of the @Async annotation.@Asyncvoid doSomething(String s) { // this will be executed asynchronously}Even methods that return a value can be invoked asynchronously. However, such methods are required to have a Future typed return value. This still provides the benefit of asynchronous execution so that the caller can perform other tasks prior to calling get() on that Future.@AsyncFuture<String> returnSomething(int i) { // this will be executed asynchronously}??