The difference between IOs and Macros
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Integration objects are essentially a Java wrapper the encapsulates the macro state management. What I mean by that is, you can call setters and getters on the integration object and manage its state.
Macros on the other hand can only be run within the context of either a customization or the macros tab of the default connection. So in case you didn't already know, you can run macros automatically when the connection is established.
So, think of integration objects as an extension to a macro. They still use the .hma script during execution and they given greater flexibility for use in web services or they allow you to create a nice lightweight framework for use with JSF, Richfaces, Spring, Hibernate, and other exciting technologies.
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