I have encountered a cyclic dependency issue while developing application using eclipse based plug-in development environment. Here I am going to explain the issue, which you might be also encountered during the plug-in development and which would have lead you to re-factorize your code to solve this issue. But here I am going to use extension-point using which I can invoke execute code from another plug-in and get results without adding interdependency between them.
Example:
I have eclipse plug-ins PluginA and PluginB, here PluginB is already dependent on PluginA. Now I have some class method in PluginB, and I would like to execute that method from one of the class in PluginA .
- If we add the dependency of PluginA on PluginB then it would result in cyclic dependency.
- Alternatively, what we can do is to re-factor the code in such a way that this method and relevant calsses moved to PluginA so that it would be available in both PluginA and PluginB, but this solution will be expensive in the well deployed system since it involves lot of testing efforts and it may break, if we missed out something during re-factoring, And there may more such logic should come out and again we need to re-factorize with same process.
- Here, I am going to discuss alternate and permanent solution which can be used for calling method of the class which belong to PluginB form some class of PluginA without adding dependency and avoiding the re-factorization of the code.
Visit http://technical-tejash.blogspot.com/2010/03/eclipse-avoid-cyclic-dependency-between.html for step by step guide about Using extension-point to avoid cyclic dependency between 2 plugins without refactoring code
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