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Merge pull request #2735 from federicobond/synchronized-singleton

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Synchronize initialization of ContributionListing singleton
This commit is contained in:
Ben Fry
2014-08-04 20:35:37 -04:00
parent 0427c342cc 0b77d7d502
commit fb4cba43ed
1 changed files with 6 additions and 2 deletions
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8
app/src/processing/app/contrib/ContributionListing.java
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@@ -36,7 +36,7 @@ public class ContributionListing {
static final String LISTING_URL =
"http://download.processing.org/contributions.txt";
static ContributionListing singleInstance;
static volatile ContributionListing singleInstance;
File listingFile;
ArrayList<ContributionChangeListener> listeners;
@@ -64,7 +64,11 @@ public class ContributionListing {
static ContributionListing getInstance() {
if (singleInstance == null) {
singleInstance = new ContributionListing();
synchronized (ContributionListing.class) {
if (singleInstance == null) {
singleInstance = new ContributionListing();
}
}
}
return singleInstance;
}