/**
* Reads the GemFire JMX Agent's status from the status file (.agent.ser) in it's working
* directory.
*
* <p>
*
* @return a Status object containing the state persisted to the .agent.ser file in the working
* directory and representing the status of the Agent
* @throws IOException if the status file was unable to be read.
* @throws RuntimeException if the class of the object written to the .agent.ser file is not of
* type Status.
*/
protected Status readStatus() throws IOException {
FileInputStream fileIn = null;
ObjectInputStream objectIn = null;
try {
fileIn = new FileInputStream(new File(workingDirectory, statusFileName));
objectIn = new ObjectInputStream(fileIn);
this.status = (Status) objectIn.readObject();
return this.status;
} catch (ClassNotFoundException e) {
throw new RuntimeException(e);
} finally {
IOUtils.close(objectIn);
IOUtils.close(fileIn);
}
}
/**
* Sets the status of the GemFire JMX Agent by serializing a <code>Status</code> object to a
* status file in the Agent's working directory.
*
* <p>
*
* @param status the Status object representing the state of the Agent process to persist to disk.
* @return the written Status object.
* @throws IOException if the Status could not be successfully persisted to disk.
*/
public Status writeStatus(final Status status) throws IOException {
FileOutputStream fileOut = null;
ObjectOutputStream objectOut = null;
try {
fileOut = new FileOutputStream(new File(workingDirectory, statusFileName));
objectOut = new ObjectOutputStream(fileOut);
objectOut.writeObject(status);
objectOut.flush();
this.status = status;
return this.status;
} finally {
IOUtils.close(objectOut);
IOUtils.close(fileOut);
}
}
public static int readPid(final File pidFile) throws IOException {
BufferedReader reader = null;
try {
reader = new BufferedReader(new FileReader(pidFile));
return Integer.parseInt(reader.readLine());
} finally {
IOUtils.close(reader);
}
}