/**
* System command. Execute a command and insert the result.
*
* @param args
* @param help
* @param patterns
* @param low
* @param high
*/
public String system_internal(boolean allowFail, String args[]) throws Exception {
verifyCommand(
args,
"${"
+ (allowFail ? "system-allow-fail" : "system")
+ ";<command>[;<in>]}, execute a system command",
null,
2,
3);
String command = args[1];
String input = null;
if (args.length > 2) {
input = args[2];
}
Process process = Runtime.getRuntime().exec(command, null, domain.getBase());
if (input != null) {
process.getOutputStream().write(input.getBytes("UTF-8"));
}
process.getOutputStream().close();
String s = IO.collect(process.getInputStream(), "UTF-8");
int exitValue = process.waitFor();
if (exitValue != 0) return exitValue + "";
if (!allowFail && (exitValue != 0)) {
domain.error("System command " + command + " failed with " + exitValue);
}
return s.trim();
}
/**
* This is called when JPM runs in the background to start jobs
*
* @throws Exception
*/
public void daemon() throws Exception {
Runtime.getRuntime()
.addShutdownHook(
new Thread("Daemon shutdown") {
public void run() {
for (Service service : startedByDaemon) {
try {
reporter.error("Stopping " + service);
service.stop();
reporter.error("Stopped " + service);
} catch (Exception e) {
// Ignore
}
}
}
});
List<ServiceData> services = getServices();
Map<String, ServiceData> map = new HashMap<String, ServiceData>();
for (ServiceData d : services) {
map.put(d.name, d);
}
List<ServiceData> start = new ArrayList<ServiceData>();
Set<ServiceData> set = new HashSet<ServiceData>();
for (ServiceData sd : services) {
checkStartup(map, start, sd, set);
}
if (start.isEmpty()) reporter.warning("No services to start");
for (ServiceData sd : start) {
try {
Service service = getService(sd.name);
reporter.trace("Starting " + service);
String result = service.start();
if (result != null) reporter.error("Started error " + result);
else startedByDaemon.add(service);
reporter.trace("Started " + service);
} catch (Exception e) {
reporter.error("Cannot start daemon %s, due to %s", sd.name, e);
}
}
while (true) {
for (Service sd : startedByDaemon) {
try {
if (!sd.isRunning()) {
reporter.error("Starting due to failure " + sd);
String result = sd.start();
if (result != null) reporter.error("Started error " + result);
}
} catch (Exception e) {
reporter.error("Cannot start daemon %s, due to %s", sd, e);
}
}
Thread.sleep(10000);
}
}
