/** {@inheritDoc} */ protected void getNewMonitors(Map<String, Monitor> map) throws MonitorException { assert Thread.holdsLock(this); int used = prologue.getUsed(); long modificationTime = prologue.getModificationTimeStamp(); if ((used > lastUsed) || (lastModificationTime > modificationTime)) { lastUsed = used; lastModificationTime = modificationTime; Monitor monitor = getNextMonitorEntry(); while (monitor != null) { String name = monitor.getName(); // guard against duplicate entries if (!map.containsKey(name)) { map.put(name, monitor); /* * insertedMonitors is null when called from pollFor() * via buildMonitorMap(). Since we update insertedMonitors * at the end of buildMonitorMap(), it's ok to skip the * add here. */ if (insertedMonitors != null) { insertedMonitors.add(monitor); } } monitor = getNextMonitorEntry(); } } }
/** Method to dump debugging information */ private void dumpAll(Map map, int lvmid) { if (DEBUG) { Set keys = map.keySet(); System.err.println("Dump for " + lvmid); int j = 0; for (Iterator i = keys.iterator(); i.hasNext(); j++) { Monitor monitor = (Monitor) map.get(i.next()); System.err.println(j + "\t" + monitor.getName() + "=" + monitor.getValue()); } System.err.println("nextEntry = " + nextEntry + " pollForEntry = " + pollForEntry); System.err.println("Buffer info:"); System.err.println("buffer = " + buffer); } }
/** {@inheritDoc} */ protected void buildMonitorMap(Map<String, Monitor> map) throws MonitorException { assert Thread.holdsLock(this); // start at the beginning of the buffer buffer.rewind(); // create pseudo monitors buildPseudoMonitors(map); // position buffer to start of the data section buffer.position(prologue.getSize()); nextEntry = buffer.position(); perfDataItem = 0; int used = prologue.getUsed(); long modificationTime = prologue.getModificationTimeStamp(); Monitor m = getNextMonitorEntry(); while (m != null) { map.put(m.getName(), m); m = getNextMonitorEntry(); } /* * set the last modification data. These are set to the values * recorded before parsing the data structure. This allows the * the data structure to be modified while the Map is being built. * The Map may contain more entries than indicated based on the * time stamp, but this is handled by ignoring duplicate entries * when the Map is updated in getNewMonitors(). */ lastUsed = used; lastModificationTime = modificationTime; // synchronize with the target jvm synchWithTarget(map); // work around 1.4.2 counter inititization bugs kludge(map); insertedMonitors = new ArrayList<Monitor>(map.values()); }