DependentCache [1011310]

< > BotCompany Repo | #1011310 // DependentCache

JavaX fragment (include)

// f is a function or an instance of Cache (the dependee)
sclass DependentCache<A> extends Cache<A> {
  O depF, lastDep;
  
  *() {}
  *(O *maker, O *depF) {}
  
  A get() {
    if (hasLock(lock)) ret value; // Must be called from within maker
    {
      lock lock;
      O dep;
      if (depF instanceof Cache) dep = depF/Cache.changeCount;
      else {
        dep = callF(depF);
        if (dep instanceof Cache) dep = dep/Cache.changeCount;
      }
      if (neq(dep, lastDep)) {
        clear();
        lastDep = dep;
      }
    }
    ret super.get();
  }
}

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Snippet ID:

#1011310

Snippet name:

DependentCache

Eternal ID of this version:

#1011310/6

Text MD5:

d505bfb8dcf5b87142e3bb1b2a877729

Author:

stefan

Category:

javax

Type:

JavaX fragment (include)

Public (visible to everyone):

Yes

Archived (hidden from active list):

Created/modified:

2018-07-22 12:04:33

Source code size:

589 bytes / 25 lines

Pitched / IR pitched:

No / No

Views / Downloads:

501 / 2055

Version history:

5 change(s)

Referenced in:

[show references]

1	// f is a function or an instance of Cache (the dependee)
2	sclass DependentCache<A> extends Cache<A> {
3	O depF, lastDep;
4
5	*() {}
6	(O maker, O *depF) {}
7
8	A get() {
9	if (hasLock(lock)) ret value; // Must be called from within maker
10	{
11	lock lock;
12	O dep;
13	if (depF instanceof Cache) dep = depF/Cache.changeCount;
14	else {
15	dep = callF(depF);
16	if (dep instanceof Cache) dep = dep/Cache.changeCount;
17	}
18	if (neq(dep, lastDep)) {
19	clear();
20	lastDep = dep;
21	}
22	}
23	ret super.get();
24	}
25	}