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What is Handler Class in Salesforce?
What is the use of Handler Class and where it can be implemented?
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2 Replies
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Trigger handlers (not sure if what code you posted you want to keep) "enforce a logical sequence to the trigger code and in turn help to keep code tidy and more maintainable. Keeping trigger logic for each object in a single place avoids problems where multiple triggers are in contention with each other and makes it easier to debug."
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A handler is basically a message queue. You post a message to it, and it will eventually process it by calling its run method and passing the message to it. Since these run calls will always occur in the order of messages received on the same thread, it allows you to serialize events
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