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package org.openslx.taskmanager.tasks;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import org.openslx.taskmanager.api.AbstractTask;
import com.google.gson.annotations.Expose;
import com.jcabi.ssh.SSH;
import com.jcabi.ssh.Shell;
public class RemoteReboot extends AbstractTask
{
@Expose
private Client[] clients;
@Expose
private boolean shutdown;
@Expose
private int minutes;
@Expose
private String locationId;
@Expose
private String locationName;
@Expose
private String sshkey;
@Expose
private int port;
private Output status = new Output();
@Override
protected boolean initTask()
{
this.setStatusObject( this.status );
status.clients = clients;
Date shutdownTime = new Date(System.currentTimeMillis()+minutes*60*1000);
SimpleDateFormat sdf = new SimpleDateFormat("HH:mm");
status.time = sdf.format(shutdownTime);
status.locationId = locationId;
status.locationName = locationName;
return true;
}
@Override
protected boolean execute()
{
if ( clients.length == 0 )
return true;
// try to connect to every client and start the reboot/shutdown process
ExecutorService tp = Executors.newFixedThreadPool( clients.length > 4 ? 4 : clients.length );
for (final Client client : clients) {
if ( client == null || client.clientip == null )
continue;
status.clientStatus.put(client.clientip, ClientStatus.CONNECTING);
tp.submit(new Runnable() {
public void run() {
try {
Shell shell = new SSH(client.clientip, port, "root", sshkey);
if (shutdown) {
new Shell.Empty(shell).exec("/sbin/shutdown +" + minutes);
status.clientStatus.put(client.clientip, minutes == 0 ? ClientStatus.SHUTDOWN : ClientStatus.SHUTDOWN_AT);
} else {
new Shell.Empty(shell).exec("/sbin/reboot");
status.clientStatus.put(client.clientip, ClientStatus.REBOOTING);
}
} catch (IOException e) {
status.clientStatus.put(client.clientip, ClientStatus.ERROR);
}
}
});
}
tp.shutdown();
try {
tp.awaitTermination( clients.length * 5, TimeUnit.SECONDS );
} catch ( InterruptedException e ) {
Thread.currentThread().interrupt();
return false;
}
// wait for rebooting clients to finish rebooting
List<String> rebootingClients = new ArrayList<>();
for (Entry<String, ClientStatus> entry : status.clientStatus.entrySet()) {
if (entry.getValue() == ClientStatus.REBOOTING) {
rebootingClients.add(entry.getKey());
}
}
if (rebootingClients.size() > 0) {
ExecutorService statusTP = Executors.newFixedThreadPool( rebootingClients.size() > 4 ? 4 : rebootingClients.size() );
for (final String ip : rebootingClients) {
statusTP.submit(new Runnable() {
public void run() {
while (!isOnline(ip)) {
try {
Thread.sleep(3000);
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
return;
}
}
status.clientStatus.put(ip, ClientStatus.ONLINE);
}
});
}
statusTP.shutdown();
try {
statusTP.awaitTermination( 180, TimeUnit.SECONDS );
} catch ( InterruptedException e ) {
Thread.currentThread().interrupt();
return false;
}
}
// change status of clients that got stuck because of timeouts
for (Map.Entry<String, ClientStatus> entry : status.clientStatus.entrySet()) {
ClientStatus value = entry.getValue();
if (value == ClientStatus.CONNECTING || value == ClientStatus.REBOOTING) {
entry.setValue(ClientStatus.ERROR);
}
}
return true;
}
private boolean isOnline(String address)
{
try ( Socket s = new Socket() ) {
s.connect( new InetSocketAddress( address, port ), 3000 );
return true;
} catch ( Exception ex ) {
}
return false;
}
/**
* Output - contains additional status data of this task
*/
@SuppressWarnings( "unused" )
static class Output
{
private Map<String, ClientStatus> clientStatus = new ConcurrentHashMap<>();
private Client[] clients;
private String time;
private String locationId;
private String locationName;
}
@SuppressWarnings( "unused" )
static class Client
{
@Expose
private String machineuuid;
@Expose
private String clientip;
}
static enum ClientStatus {
CONNECTING, REBOOTING, SHUTDOWN, SHUTDOWN_AT, ONLINE, ERROR;
}
}
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