public void load(final File file) throws IOException {
checkNotNull(file);
if (file.exists()) {
Log.trace("Loading history from: ", file);
load(new FileReader(file));
}
}
public void purge() throws IOException {
Log.trace("Purging history");
clear();
if (!file.delete()) {
Log.warn("Failed to delete history file: ", file);
}
}
public void flush() throws IOException {
Log.trace("Flushing history");
if (!file.exists()) {
File dir = file.getParentFile();
if (!dir.exists() && !dir.mkdirs()) {
Log.warn("Failed to create directory: ", dir);
}
if (!file.createNewFile()) {
Log.warn("Failed to create file: ", file);
}
}
PrintStream out =
new PrintStream(new BufferedOutputStream(new FileOutputStream(file)), false, "UTF-8");
try {
for (Entry entry : this) {
out.println(entry.value());
}
} finally {
out.close();
}
}