Although we have stressed the whole is greater than the sum of the individual, but how a single "individual" right to play a greater effect of the combination into the "whole" is not easy. Because these single framework developed by different teams, the framework and the framework of the impedance between the natural, between this framework and the framework of the "generation gap" requires additional configuration and coding to close.
Each frame has its own configuration file, the framework of the integration of disaster often brings configurations, such as the Spring and Struts integration, not only a Struts configuration file itself, not less, in Spring Action also needs to provide configuration information for each, and both need to comply with certain contract.
Framework and the framework with each other often occur between similar or duplicate functions, how to choose, how to use the often difficult for developers. Such as Spring AOP method itself provides a cache function to return the results, and Hibernate itself to provide two cache, whether both use it, or choose one from? The middle will often lead to much debate.
Framework integration problems have become increasingly prominent, we can find the open source community a large number of forums or discussion topics.
Currently there have been some attempts to solve the framework of the integration of open source projects, such as foreign AppFuse, domestic SpringSide, the integration of the framework to provide professional guidance. But there is no good solution to the actual needs of real development. The integrated framework in order to increase interoperability, network are spread too wide, leading to integration of the framework itself like a giant, daunting, and dexterity of the custom there, and reduce their utility, these integrated open source projects are often reduced to an instance of guiding.
Upgrade troubles
Active in the framework of the daily upgrade, feature-rich. Second, because of open source frameworks exist to some extent arbitrary, often leads to the actual use of the framework, we found lot of hidden Bug, it sometimes becomes inevitable upgrade to a frame. Open-source framework for formal specification than the Sun have a more flexible upgrade path, high and low version compatibility issues have become a common occurrence. Such as the famous Hibernate, the 3.0 version and 2.0 versions of the package names have undergone radical changes, just-released versions of Acegi and low very different, incompatible.
An integrated framework consists of a number of different team from the framework of the composition, integration framework in the framework of these combinations on high, the upgrade changes the underlying framework of the portfolio has caused a corresponding rise in the framework of the situation, the fragile stability of the integration framework is easily break.
The upgrade also has a direct combination of the framework development team brings the pressure of learning, in order to familiar with the framework of the new features and improvements in the development of spare time, they had to squeeze their spare time to learn continuously charge. Always a framework for learning the new features not yet been completed, another new version of the framework of another burst of cheers in the debut, allow developers to find all his efforts to just a horse ride a cow chasing the game.
3, the developer how to get out puzzle
Framework of explosive growth and the rapid pace of technological change, so just from traditional J2EE puzzle to get out of developers fall into a new dilemma. There are many personal experience of the developers a large fall in the line of grievances, and even many voices crying out, hope to return to JSP + JavaBean + JDBC to that era of innocence.
Framework of software development were also present to the world a fresh and happy, do not want to look forward to healthy individuals of the chaos into a holistic dispute. In the complicated puzzle out how the open source world and the plight of the ship to grasp the direction of their technology, is a meditative reverie every developers to do.
Focus on learning by analogy
Everyone's time is limited, for the periodic tight schedule anxious to work overtime and more so for the developers to make the developer could not "know the word all over the world to read the book to make world" learning-by-frame. Select good for themselves, for the project framework is particularly important focus of study. Not only master the technical details, but also to understand the framework of the principles and ideas, so that when in contact with the relevant framework, we can comprehend by analogy, identify what is true.
If you are in-depth understanding of the Struts MVC framework of principles and ideas, in contact with Tapestry, Spring MVC and other framework, you will find the difference between the two is metaphysical, rather than qualitative differences, even if the actual need for the framework really want to convert When you can easily smooth transition.
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