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#354 Add maven model for feature toggle design pattern

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This commit is contained in:
Joseph McCarthy
2016-01-25 21:14:24 +00:00
parent cf10bd1d05
commit d7526fc7c0
86 changed files with 1165 additions and 270 deletions
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6
double-checked-locking/index.md
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@@ -10,14 +10,16 @@ tags:
- Idiom
---
**Intent:** Reduce the overhead of acquiring a lock by first testing the
## Intent
Reduce the overhead of acquiring a lock by first testing the
locking criterion (the "lock hint") without actually acquiring the lock. Only
if the locking criterion check indicates that locking is required does the
actual locking logic proceed.
![alt text](./etc/double_checked_locking_1.png "Double Checked Locking")
**Applicability:** Use the Double Checked Locking pattern when
## Applicability
Use the Double Checked Locking pattern when
* there is a concurrent access in object creation, e.g. singleton, where you want to create single instance of the same class and checking if it's null or not maybe not be enough when there are two or more threads that checks if instance is null or not.
* there is a concurrent access on a method where method's behaviour changes according to the some constraints and these constraint change within this method.