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Use a WeakReference to cache class loaders

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Fixes #171
This commit is contained in:
Havoc Pennington 2014-06-23 09:11:32 -04:00
parent 08c4fe3950
commit 95b31ccd57
1 changed files with 5 additions and 4 deletions
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9
config/src/main/java/com/typesafe/config/impl/ConfigImpl.java
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@ -4,6 +4,7 @@
package com.typesafe.config.impl;
import java.io.File;
import java.lang.ref.WeakReference;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
@ -28,22 +29,22 @@ public class ConfigImpl {
private static class LoaderCache {
private Config currentSystemProperties;
private ClassLoader currentLoader;
private WeakReference<ClassLoader> currentLoader;
private Map<String, Config> cache;
LoaderCache() {
this.currentSystemProperties = null;
this.currentLoader = null;
this.currentLoader = new WeakReference<ClassLoader>(null);
this.cache = new HashMap<String, Config>();
}
// for now, caching as long as the loader remains the same,
// drop entire cache if it changes.
synchronized Config getOrElseUpdate(ClassLoader loader, String key, Callable<Config> updater) {
if (loader != currentLoader) {
if (loader != currentLoader.get()) {
// reset the cache if we start using a different loader
cache.clear();
currentLoader = loader;
currentLoader = new WeakReference<ClassLoader>(loader);
}
Config systemProperties = systemPropertiesAsConfig();