Я пытаюсь периодически получать информацию о работоспособности сервера (я планирую использовать для нее задание cron) и сохраняю его в файле CSV. Проблема в том, что в приведенном ниже коде хранится только одна строка. Т.е. в CSV-файле хранится только последняя запись, а предыдущая запись удаляется. Согласно моему требованию, файл CSV должен содержать записи для каждого выполнения ниже java кода.
Нужна помощь, чтобы решить проблему. Я не должен использовать Maven или любые внешние банки для этого требования.
public class MachineHealthCheckReportGeneration {
private final String environmentname = "DEV";
private final String applicationname = "XYZ";
private final String username = System.getProperty("user.name"); // DO NOT CHANGE ANYTHING IN THIS THIS LINE
private final String csvfiledir = "D:\\logs\\monitoring\\server\\" + environmentname;
private Map<String, String> systeminformation = null;
/// DO NOT EDIT AFTER THIS LINE ///
private Map<String, String> getMachineHealthCehckReport() {
systeminformation = new HashMap<>();
OperatingSystemMXBean osbean = ManagementFactory.getPlatformMXBean(OperatingSystemMXBean.class);
systeminformation.put("Application", applicationname);
systeminformation.put("CaptureTime", Instant.now().toString());
try {
systeminformation.put("HostName", InetAddress.getLocalHost().getHostName());
} catch (UnknownHostException e) {
System.err.println("Failed to get Hostname...");
e.printStackTrace();
}
try {
systeminformation.put("IPAddress", InetAddress.getLocalHost().getHostAddress());
} catch (UnknownHostException e) {
System.err.println("Failed to get IP Address...");
e.printStackTrace();
}
systeminformation.put("CPUCount", Long.toString(osbean.getAvailableProcessors()));
systeminformation.put("SystemCPULoad", Double.toString(osbean.getSystemCpuLoad()));
systeminformation.put("ProcessCPULoad", Double.toString(osbean.getProcessCpuLoad()).substring(0, 4));
systeminformation.put("ProcessCPUTime", Long.toString(osbean.getProcessCpuTime() / (1000 * 1000)) + " ms");
systeminformation.put("FreePhysicalMemory",
Long.toString(osbean.getFreePhysicalMemorySize() / (1024 * 1024 * 1024)) + " GB");
systeminformation.put("TotalPhysicalMemory",
Long.toString(osbean.getTotalPhysicalMemorySize() / (1024 * 1024 * 1024)) + " GB");
systeminformation.put("CommittedVirtualMemory",
Long.toString(osbean.getCommittedVirtualMemorySize() / (1024 * 1024)) + " MB");
systeminformation.put("FreeSwapSpace",
Long.toString(osbean.getFreeSwapSpaceSize() / (1024 * 1024 * 1024)) + " GB");
systeminformation.put("TotalSwapSpace",
Long.toString(osbean.getTotalSwapSpaceSize() / (1024 * 1024 * 1024)) + " GB");
systeminformation.put("D:\\logs",
Long.toString(new File("D:\\logs").getFreeSpace() / (1024 * 1024 * 1024)) + " GB");
systeminformation.put("D:\\config",
Long.toString(new File("D:\\config").getFreeSpace() / (1024 * 1024 * 1024)) + " GB");
System.out.println(systeminformation);
return systeminformation;
}
protected boolean printMachineHealthCheckReport() {
String csvfileline = null;
boolean isreportprinted = false;
// create csv file directory and file if it does not exists
File directory = new File(String.valueOf(csvfiledir));
File file = new File(String.valueOf(csvfiledir + "/" + systeminformation.get("HostName") + ".csv"));
if (!directory.exists()) {
directory.mkdirs();
if (!file.exists()) {
try {
file.createNewFile();
} catch (IOException e) {
System.err.println("Failed to create file : " + file);
e.printStackTrace();
}
}
}
try {
FileWriter writer = new FileWriter(file);
// insert header if file is empty
if (file.length() == 0) {
writer.append(
"Application,CaptureTime,HostName,IPAddress,CPUCount,SystemCPULoad,ProcessCPULoad,ProcessCPUTime,FreePhysicalMemory,TotalPhysicalMemory,CommittedVirtualMemory,FreeSwapSapce,TotalSwapSpace");
}
csvfileline = "\r\n"+systeminformation.get("Application") + ",";
csvfileline = csvfileline + systeminformation.get("CaptureTime") + ",";
csvfileline = csvfileline + systeminformation.get("HostName") + ",";
csvfileline = csvfileline + systeminformation.get("IPAddress") + ",";
csvfileline = csvfileline + systeminformation.get("CPUCount") + ",";
csvfileline = csvfileline + systeminformation.get("SystemCPULoad") + ",";
csvfileline = csvfileline + systeminformation.get("ProcessCPULoad") + ",";
csvfileline = csvfileline + systeminformation.get("ProcessCPUTime") + ",";
csvfileline = csvfileline + systeminformation.get("FreePhysicalMemory") + ",";
csvfileline = csvfileline + systeminformation.get("TotalPhysicalMemory") + ",";
csvfileline = csvfileline + systeminformation.get("CommittedVirtualMemory") + ",";
csvfileline = csvfileline + systeminformation.get("FreeSwapSpace") + ",";
csvfileline = csvfileline + systeminformation.get("TotalSwapSpace");
System.out.println(csvfileline);
writer.append(csvfileline);
writer.flush();
writer.close();
isreportprinted = true;
} catch (IOException e) {
System.err.println("Error while writing sytem healthcheck report to csv file : "+file);
e.printStackTrace();
}
return isreportprinted;
}
public static void main(String[] args) {
MachineHealthCheckReportGeneration mm = new MachineHealthCheckReportGeneration();
System.out.println(mm.printMachineHealthCheckReport());
}
}