/**
* load key/values form the file line is separated by the 'space'
*
* @throws DbusEventBufferMetaInfo.DbusEventBufferMetaInfoException
*/
public boolean loadMetaInfo() throws DbusEventBufferMetaInfo.DbusEventBufferMetaInfoException {
//
FileReader fr;
BufferedReader br = null;
_valid = false;
boolean debugEnabled = DbusEventBuffer.LOG.isDebugEnabled();
try {
fr = new FileReader(_file);
br = new BufferedReader(fr);
DbusEventBuffer.LOG.info("loading metaInfoFile " + _file);
_info.clear();
String line = br.readLine();
while (line != null) {
if (line.isEmpty() || line.charAt(0) == '#') continue;
// format is key' 'val
int idx = line.indexOf(KEY_VALUE_SEP);
if (idx < 0) {
DbusEventBuffer.LOG.warn("illegal line in metaInfoFile. line=" + line);
continue;
}
String key = line.substring(0, idx);
String val = line.substring(idx + 1);
_info.put(key, val);
if (debugEnabled) DbusEventBuffer.LOG.debug("\tkey=" + key + "; val=" + val);
line = br.readLine();
_valid = true;
}
} catch (IOException e) {
throw new DbusEventBufferMetaInfo.DbusEventBufferMetaInfoException(
this, "cannot read metaInfoFile: " + e.getLocalizedMessage());
} finally {
if (br != null)
try {
br.close();
} catch (IOException e) {
DbusEventBuffer.LOG.warn("faild to close " + _file);
}
}
int version = getInt("version");
if (version != META_INFO_VERSION)
throw new DbusEventBufferMetaInfo.DbusEventBufferMetaInfoException(
this, "metaInfoFile version doesn't match. Please remove the metafile and restart");
if (isMetaFileOlderThenMMappedFiles(getSessionId())) {
_valid = false; // not valid file - don't use
}
return _valid;
}
public void saveAndClose() throws IOException {
// update version
setVal("version", Integer.toString(META_INFO_VERSION));
if (_file.exists()) {
File renameTo = new File(_file.getAbsoluteFile() + "." + System.currentTimeMillis());
_file.renameTo(renameTo);
DbusEventBuffer.LOG.warn("metaInfoFile " + _file + " exists. it is renambed to " + renameTo);
}
FileWriter fw = new FileWriter(_file);
BufferedWriter bw = new BufferedWriter(fw);
for (Map.Entry<String, String> e : _info.entrySet()) {
bw.write(e.getKey() + KEY_VALUE_SEP + e.getValue());
bw.newLine();
}
bw.close();
}
