Typical double check
| class DoubleCheck { | |
| private SomeResource myResource; | |
| public SomeResource getResource() { | |
| if(myResource != null) { | |
| return myResource | |
| } | |
| synchronized(this) { | |
| if(myResource != null) { | |
| return myResource | |
| } | |
| myResource = new SomeResource(); | |
| return myResource | |
| } | |
| } | |
| } |
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