Is just one thread handling all the behavior within a "call" scope? If so, you can use ThreadLocals to implement the scope, as long as you signal when a thread enters and leaves the scope:
callScope.enter();
try {
...do stuff;
} finally {
callScope.exit();
}
And in this example, you can use SimpleScope right out of the box.
If you are dispatching to multiple threads within the duration of a "call"
scope, then you'll need to have child threads inherit their parent's values.
But that question is orthogonal to designing a smaller lifespan of a longer
scope (such as RequestScope), and the example above should suffice.
2010/1/17 Willi Schönborn <[email protected]>
> On 17/01/2010 19:43, [email protected] wrote:
>
>>
>> On Jan 17, 6:10 am, Willi Schönborn<[email protected]>
>> wrote:
>>
>>
>>> we have a custom made framework here which has 4 scopes:
>>> - Application
>>> - HTTP Session
>>> - HTTP Request
>>> - Call
>>>
>>> Call is something that can happen multiple times during one request.
>>> I dont think there is really a need to understand the semantic, anyways
>>> the request is bound to a thread, so i can use a threadlocal to keep
>>> track
>>> of the current request, which itself has a reference to the current
>>> session.
>>> Any idea how i can keep track of the current call?
>>>
>>>
>> Take a look at CustomScopes:
>> http://code.google.com/p/google-guice/wiki/CustomScopes
>>
>>
> I know about custom scopes, what i need is a hint/idea/whatever how to
> implement
> a scope that does not rely on a threadlocal. All non-singleton scopes i
> know about, like
> the request scope, the session scope or the example implementatio of simple
> scope (see your link)
> are all based on a threadlocal which itself only works when you use
> threads. The problem is,
> my custom scope (@CallScoped) is shorter than a request, so i cant use a
> threadlocal.
>
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