How to use field in @Component class simultaneously?

Question

Following this code:

@Component
public class ClassC extends ClassA<T> implements ClassB {

    private String preferredDateTimeFormat = null;

My process is using this class after calling a request from client.

Per each request I want to keep the preferredDateTimeFormat value, what is actually being made that, the preferredDateTimeFormat variable is being used for all of my requests.

What can I do to solve it?

How to make `preferredDateTimeFormat` field to be different per each `ClassC` (a @Component) instance — roeygol, May 10 '17 at 13:24
Each instance of this `@Component` should have different value for `preferredDateTimeFormat` variable — roeygol, May 10 '17 at 13:26
You want to annotate your class with a scope (request). As Spring per default initializes singleton beans. — Martin Hansen, May 10 '17 at 13:26

fujy · Accepted Answer · 2017-05-10T20:23:03.553

1

Use @Scope on your class with value = request

like this

@Component
@Scope(value="request", proxyMode =ScopedProxyMode.TARGET_CLASS)
public class ClassC extends ClassA<T> implements ClassB {

  private String preferredDateTimeFormat = null;

You can find more information on Spring Bean Scopes here

edited May 10 '17 at 20:23

answered May 10 '17 at 13:26

fujy

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That one worked, could you please give me some short info about the purpose of - `@Scope(value="request", proxyMode =ScopedProxyMode.TARGET_CLASS)` ? – roeygol May 10 '17 at 14:58

score 0 · Answer 2 · answered May 10 '17 at 13:26

0

There are multiple ways.

You can define a Request Scope bean and place the preferredDateTimeFormat there.

OR

You can define ThreadLocal property and place the value there.

answered May 10 '17 at 13:26

StanislavL

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score 0 · Answer 3 · edited May 23 '17 at 12:10

0

I'm not entirely sure if you mean you want a ClassC instance per request or a new instance everytime it is used but you might want to look into the @Scope annotation with its values Prototype and Request.

See Spring Bean Scopes.

edited May 23 '17 at 12:10

Community

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answered May 10 '17 at 13:28

Christian Ziegler

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How to use field in @Component class simultaneously?

3 Answers3