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Make event handling in ClassPathFileSystemWatcherTests thread-safe
See gh-30844
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@ -23,6 +23,7 @@ import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.concurrent.CopyOnWriteArrayList;
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import org.junit.jupiter.api.Test;
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import org.junit.jupiter.api.io.TempDir;
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@ -116,7 +117,7 @@ class ClassPathFileSystemWatcherTests {
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static class Listener implements ApplicationListener<ClassPathChangedEvent> {
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private List<ClassPathChangedEvent> events = new ArrayList<>();
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private List<ClassPathChangedEvent> events = new CopyOnWriteArrayList<>();
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@Override
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public void onApplicationEvent(ClassPathChangedEvent event) {
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