I have an XML file (in question) is used by process across multiple JVM. At one point of time, multiple process access the same file and writes to it. And i want the updated information to be read after each write. So basically 'FileLock' is a way to ensure to get exclusive lock on the File. But since it is XML, I tried to load using JAXB.
JAXBContext context = JAXBContext.newInstance(rootClass);
Unmarshaller um = context.createUnmarshaller();
Object obj = um.unmarshal(new FileInputStream(sourceXml));
with JAXB, for once I have to read the file using FileInputStream and get exclusive lock on the channel.
JAXBContext context = JAXBContext.newInstance(rootClass);
Marshaller m = context.createMarshaller();
m.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
m.setProperty(Marshaller.JAXB_ENCODING, "UTF-8");
m.marshal(rootObj, xmlFile);
But later to write it, the file is already locked by InputStream.
RandomAccessFile to simultaneously read/write is not an option for the XML file.
any ideas to get around this with single lock mechanism?
