Is good approach to create Singleton pattern for all class?

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I'm new to pattern approach.Is good approach to create Singleton pattern for all class?

Posted 26-Oct-14 5:36am

mn.sathish

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[no name] 26-Oct-14 11:50am

NO

Ravi Bhavnani 26-Oct-14 12:16pm

Would you want all the tools in your toolbox to be hammers? The answer to that question is the same as the answer to your question.

/ravi

Naser Hassan 26-Oct-14 16:46pm

It depends what you want to achieve with that class.
But before designing any class you need to keep one thing in mind that is SOLID principal .your first goal should be meeting SOLID then search for any pattern.
and whether all class should have singleton are not then Ravi has commented beautifully

mn.sathish 27-Oct-14 13:39pm

Thanks a lot to all

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CPallini · Accepted Answer · 2014-10-26T05:53:00

No, of course.
The Singleton design pattern has its uses.
From the very Wikipedia[^] page:

the singleton pattern is a design pattern that restricts the instantiation of a class to one object. This is useful when exactly one object is needed to coordinate actions across the system.

Rougly speaking, if you need multiple instances of a class, then the Singleton is useless.

Manas Bhardwaj · Accepted Answer · 2014-10-26T07:20:00

Solution 2

A big No. There is no one size fits all.

A Singleton candidate must satisfy three requirements:
1.) controls concurrent access to a shared resource.
2.) access to the resource will be requested from multiple, disparate parts of the system.
3.) there can be only one object.

Posted 26-Oct-14 7:20am

Manas Bhardwaj