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overwrite settings atomically

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This commit is contained in:
Sebastian Stenzel
2019-06-18 14:45:43 +02:00
parent f53f2d2ca4
commit 367281fccb
1 changed files with 6 additions and 3 deletions
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9
main/commons/src/main/java/org/cryptomator/common/settings/SettingsProvider.java
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@@ -29,6 +29,7 @@ import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.NoSuchFileException;
import java.nio.file.Path;
import java.nio.file.StandardCopyOption;
import java.nio.file.StandardOpenOption;
import java.util.Optional;
import java.util.concurrent.Executors;
@@ -109,11 +110,13 @@ public class SettingsProvider implements Provider<Settings> {
LOG.debug("Attempting to save settings to {}", settingsPath);
try {
Files.createDirectories(settingsPath.getParent());
try (OutputStream out = Files.newOutputStream(settingsPath, StandardOpenOption.CREATE, StandardOpenOption.TRUNCATE_EXISTING); //
Writer writer = new OutputStreamWriter(out, StandardCharsets.UTF_8)) {
Path tmpPath = settingsPath.resolveSibling(settingsPath.getFileName().toString() + ".tmp");
try (OutputStream out = Files.newOutputStream(tmpPath, StandardOpenOption.CREATE_NEW); //
Writer writer = new OutputStreamWriter(out, StandardCharsets.UTF_8)) {
gson.toJson(settings, writer);
LOG.info("Settings saved to {}", settingsPath);
}
Files.move(tmpPath, settingsPath, StandardCopyOption.REPLACE_EXISTING);
LOG.info("Settings saved to {}", settingsPath);
} catch (IOException e) {
LOG.error("Failed to save settings.", e);
}