When building a back - end program , it is best to first retrieve the pids or only the attributes of an item 當(dāng)構(gòu)建一個后端程序時,最好是首先檢索pid或只是檢索條目的屬性。
After developing an egl program , for example , you can generate a java wrapper , an ejb session bean , and a back - end program 例如,當(dāng)您開發(fā)好一個egl程序后,可以生成一個java包裝程序、一個ejb會話bean和一個后端程序。
If you are building a back - end program that would augment parts belonging to an item , first retrieve the pids of the items that satisfy the query 如果您正在構(gòu)建后端程序,該程序需要增加屬于條目的部分,那么首先請檢索滿足查詢的條目的pid 。
In the interpreter , a front - end / back - end architecture is used to achieve a good degree of portability and extendibility , and a feedback - directed optimization framework is used to improve the interpreter ' s performance . also , the interpreter provides the host environment with a set of well - defined apis 該框架利用后端程序動態(tài)運(yùn)行信息,制導(dǎo)前端進(jìn)行優(yōu)化決策,在不降低系統(tǒng)可用性的前提下,選擇出最有效的優(yōu)化策略,從而使性能得到提高。