/**
* Gets java path via sigar from the current process.
*
* @return java path
*/
private String getJavaPath() {
final long pid = SigarHolder.getSigar().getPid();
try {
return SigarHolder.getSigar().getProcExe(pid).getName();
} catch (final SigarException e) {
throw new IllegalStateException(
"Failed to read java path via sigar from current process (" + pid + ")", e);
}
}
/**
* *********** Monitor implementation that collects operating system metrics using SIGAR.
*
* @author barakme
* @since 2.1.0
*/
public class ProcessMonitor implements Monitor {
private final Sigar sigar = SigarHolder.getSigar();
@Override
public Map<String, Number> getMonitorValues(
final UniversalServiceManagerBean usm, final ServiceConfiguration config)
throws MonitorException {
final List<Long> pids = usm.getServiceProcessesList();
if (pids.isEmpty()) {
return new HashMap<String, Number>();
} else if (pids.size() == 1) {
final MonitorData data = new MonitorData(sigar, pids.get(0));
final Map<String, Number> map = data.getDataMap();
return map;
} else {
// Collect data for all processes, add PID to key name, and return all in one map.
final Map<String, Number> allProcessesMap = new HashMap<String, Number>();
for (final Long pid : pids) {
final MonitorData data = new MonitorData(sigar, pid);
final Map<String, Number> map = data.getDataMap();
final Set<Entry<String, Number>> entries = map.entrySet();
final String postfix = "-" + pid;
for (final Entry<String, Number> entry : entries) {
allProcessesMap.put(entry.getKey() + postfix, entry.getValue());
}
}
return allProcessesMap;
}
}
}
/**
* Gets the java home folder through the process ID of this process.
*
* @return The path to the java folder
* @throws CLIException Reporting a failure to retrieve the java home directory
*/
private String getJavaHomeDirectory() throws CLIException {
try {
final Sigar sigar = SigarHolder.getSigar();
final long thisProcessPid = sigar.getPid();
// get the java path of the current running process.
final String javaFilePath = sigar.getProcExe(thisProcessPid).getName();
final File javaFile = new File(javaFilePath);
// Locate the java folder.
final File javaFolder = javaFile.getParentFile().getParentFile();
final String javaFolderPath = javaFolder.getAbsolutePath();
return javaFolderPath;
} catch (final SigarException e) {
throw new CLIException("Failed to set the JAVA_HOME environment variable.", e);
}
}