delete and restore account restarts application automatically

added standard input to keepalive loop for issuing commands to daemon

Co-authored-by: duriancrepe <duriancrepe@protonmail.com>

common/src/main/java/bisq/common/persistence/PersistenceManager.java

@@ -108,6 +108,15 @@ public class PersistenceManager<T extends PersistableEnvelope> {
         flushAllDataToDisk(completeHandler, true);
     }
 
+    /**
+     * Resets the static members of PersistenceManager to restart the application.
+     */
+    public static void reset() {
+        ALL_PERSISTENCE_MANAGERS.clear();
+        flushAtShutdownCalled = false;
+        allServicesInitialized.set(false);
+    }
+
     // We require being called only once from the global shutdown routine. As the shutdown routine has a timeout
     // and error condition where we call the method as well beside the standard path and it could be that those
     // alternative code paths call our method after it was called already, so it is a valid but rare case.

common/src/main/java/bisq/common/setup/GracefulShutDownHandler.java

@@ -21,4 +21,5 @@ import bisq.common.handlers.ResultHandler;
 
 public interface GracefulShutDownHandler {
     void gracefulShutDown(ResultHandler resultHandler);
+    void gracefulShutDown(ResultHandler resultHandler, boolean systemExit);
 }

core/src/main/java/bisq/core/api/CoreAccountService.java

@@ -69,11 +69,15 @@ public class CoreAccountService {
     }
 
     public void addListener(AccountServiceListener listener) {
-        listeners.add(listener);
+        synchronized (listeners) {
+            listeners.add(listener);
+        }
     }
 
     public boolean removeListener(AccountServiceListener listener) {
-        return listeners.remove(listener);
+        synchronized (listeners) {
+            return listeners.remove(listener);
+        }
     }
 
     public boolean accountExists() {
@@ -99,7 +103,9 @@ public class CoreAccountService {
         if (!accountExists()) throw new IllegalStateException("Cannot open account if account does not exist");
         if (keyRing.unlockKeys(password, false)) {
             this.password = password;
-            for (AccountServiceListener listener : new ArrayList<AccountServiceListener>(listeners)) listener.onAccountOpened();
+            synchronized (listeners) {
+                for (AccountServiceListener listener : listeners) listener.onAccountOpened();
+            }
         } else {
             throw new IllegalStateException("keyRing.unlockKeys() returned false, that should never happen");
         }
@@ -110,13 +116,17 @@ public class CoreAccountService {
         String oldPassword = this.password;
         keyStorage.saveKeyRing(keyRing, oldPassword, password);
         this.password = password;
-        for (AccountServiceListener listener : new ArrayList<AccountServiceListener>(listeners)) listener.onPasswordChanged(oldPassword, password);
+        synchronized (listeners) {
+            for (AccountServiceListener listener : listeners) listener.onPasswordChanged(oldPassword, password);
+        }
     }
 
     public void closeAccount() {
         if (!isAccountOpen()) throw new IllegalStateException("Cannot close unopened account");
         keyRing.lockKeys(); // closed account means the keys are locked
-        for (AccountServiceListener listener : new ArrayList<AccountServiceListener>(listeners)) listener.onAccountClosed();
+        synchronized (listeners) {
+            for (AccountServiceListener listener : listeners) listener.onAccountClosed();
+        }
     }
 
     public void backupAccount(int bufferSize, Consumer<InputStream> consume, Consumer<Exception> error) {
@@ -147,13 +157,17 @@ public class CoreAccountService {
         if (accountExists()) throw new IllegalStateException("Cannot restore account if there is an existing account");
         File dataDir = new File(config.appDataDir.getPath());
         ZipUtils.unzipToDir(dataDir, inputStream, bufferSize);
-        for (AccountServiceListener listener : listeners) listener.onAccountRestored(onShutdown);
+        synchronized (listeners) {
+            for (AccountServiceListener listener : listeners) listener.onAccountRestored(onShutdown);
+        }
     }
 
     public void deleteAccount(Runnable onShutdown) {
         try {
             keyRing.lockKeys();
-            for (AccountServiceListener listener : listeners) listener.onAccountDeleted(onShutdown);
+            synchronized (listeners) {
+                for (AccountServiceListener listener : listeners) listener.onAccountDeleted(onShutdown);
+            }
             File dataDir = new File(config.appDataDir.getPath()); // TODO (woodser): deleting directory after gracefulShutdown() so services don't throw when they try to persist (e.g. XmrTxProofService), but gracefulShutdown() should honor read-only shutdown
             FileUtil.deleteDirectory(dataDir, null, false);
         } catch (Exception err) {

core/src/main/java/bisq/core/app/ConsoleInput.java

@@ -14,7 +14,7 @@
  * You should have received a copy of the GNU Affero General Public License
  * along with Haveno. If not, see <http://www.gnu.org/licenses/>.
  */
-package bisq.daemon.app;
+package bisq.core.app;
 
 import java.util.concurrent.*;
 

core/src/main/java/bisq/core/app/ConsoleInputReadTask.java

@@ -14,7 +14,7 @@
  * You should have received a copy of the GNU Affero General Public License
  * along with Haveno. If not, see <http://www.gnu.org/licenses/>.
  */
-package bisq.daemon.app;
+package bisq.core.app;
 
 import java.io.*;
 import java.util.concurrent.Callable;

core/src/main/java/bisq/core/app/HavenoExecutable.java

@@ -19,6 +19,7 @@ package bisq.core.app;
 
 import bisq.core.api.AccountServiceListener;
 import bisq.core.api.CoreAccountService;
+import bisq.core.api.CoreMoneroConnectionsService;
 import bisq.core.btc.setup.WalletsSetup;
 import bisq.core.btc.wallet.BtcWalletService;
 import bisq.core.btc.wallet.XmrWalletService;
@@ -48,7 +49,11 @@ import bisq.common.util.Utilities;
 
 import com.google.inject.Guice;
 import com.google.inject.Injector;
+
+import java.io.Console;
+
 import java.util.List;
+import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicInteger;
 
 import lombok.extern.slf4j.Slf4j;
@@ -60,6 +65,7 @@ public abstract class HavenoExecutable implements GracefulShutDownHandler, Haven
 
     public static final int EXIT_SUCCESS = 0;
     public static final int EXIT_FAILURE = 1;
+    public static final int EXIT_RESTART = 2;
 
     private final String fullName;
     private final String scriptName;
@@ -72,6 +78,9 @@ public abstract class HavenoExecutable implements GracefulShutDownHandler, Haven
     protected Config config;
     private boolean isShutdownInProgress;
     private boolean isReadOnly;
+    private Thread keepRunningThread;
+    private AtomicInteger keepRunningResult = new AtomicInteger(EXIT_SUCCESS);
+    private Runnable shutdownCompletedHandler;
 
     public HavenoExecutable(String fullName, String scriptName, String appName, String version) {
         this.fullName = fullName;
@@ -80,7 +89,7 @@ public abstract class HavenoExecutable implements GracefulShutDownHandler, Haven
         this.version = version;
     }
 
-    public void execute(String[] args) {
+    public int execute(String[] args) {
         try {
             config = new Config(appName, Utilities.getUserDataDir(), args);
             if (config.helpRequested) {
@@ -98,14 +107,14 @@ public abstract class HavenoExecutable implements GracefulShutDownHandler, Haven
             System.exit(EXIT_FAILURE);
         }
 
-        doExecute();
+        return doExecute();
     }
 
     ///////////////////////////////////////////////////////////////////////////////////////////
     // First synchronous execution tasks
     ///////////////////////////////////////////////////////////////////////////////////////////
 
-    protected void doExecute() {
+    protected int doExecute() {
         CommonSetup.setup(config, this);
         CoreSetup.setup(config);
 
@@ -113,6 +122,8 @@ public abstract class HavenoExecutable implements GracefulShutDownHandler, Haven
 
         // If application is JavaFX application we need to wait until it is initialized
         launchApplication();
+
+        return EXIT_SUCCESS;
     }
 
     protected abstract void configUserThread();
@@ -149,8 +160,8 @@ public abstract class HavenoExecutable implements GracefulShutDownHandler, Haven
 
         // Application needs to restart on delete and restore of account.
         accountService.addListener(new AccountServiceListener() {
-            @Override public void onAccountDeleted(Runnable onShutdown) { shutDownNoPersist(onShutdown); }
+            @Override public void onAccountDeleted(Runnable onShutdown) { shutDownNoPersist(onShutdown, true); }
-            @Override public void onAccountRestored(Runnable onShutdown) { shutDownNoPersist(onShutdown); }
+            @Override public void onAccountRestored(Runnable onShutdown) { shutDownNoPersist(onShutdown, true); }
         });
 
         // Attempt to login, subclasses should implement interactive login and or rpc login.
@@ -165,18 +176,27 @@ public abstract class HavenoExecutable implements GracefulShutDownHandler, Haven
     /**
      * Do not persist when shutting down after account restore and restarts since
      * that causes the current persistables to overwrite the restored or deleted state.
+     *
+     * If restart is specified, initiates an in-process asynchronous restart of the
+     * application by interrupting the keepRunningThread.
      */
-    protected void shutDownNoPersist(Runnable onShutdown) {
+    protected void shutDownNoPersist(Runnable onShutdown, boolean restart) {
         this.isReadOnly = true;
-        gracefulShutDown(() -> {
+        if (restart) {
-            log.info("Shutdown without persisting");
+            shutdownCompletedHandler = onShutdown;
-            if (onShutdown != null) onShutdown.run();
+            keepRunningResult.set(EXIT_RESTART);
-        });
+            keepRunningThread.interrupt();
+        } else {
+            gracefulShutDown(() -> {
+                log.info("Shutdown without persisting");
+                if (onShutdown != null) onShutdown.run();
+            });
+        }
     }
 
     /**
      * Attempt to login. TODO: supply a password in config or args
-     * 
+     *
      * @return true if account is opened successfully.
      */
     protected boolean loginAccount() {
@@ -258,16 +278,32 @@ public abstract class HavenoExecutable implements GracefulShutDownHandler, Haven
     // GracefulShutDownHandler implementation
     ///////////////////////////////////////////////////////////////////////////////////////////
 
-    // This might need to be overwritten in case the application is not using all modules
     @Override
     public void gracefulShutDown(ResultHandler resultHandler) {
+        gracefulShutDown(resultHandler, true);
+    }
+
+    // This might need to be overwritten in case the application is not using all modules
+    @Override
+    public void gracefulShutDown(ResultHandler onShutdown, boolean systemExit) {
         log.info("Start graceful shutDown");
         if (isShutdownInProgress) {
+            log.info("Ignoring call to gracefulShutDown, already in progress");
             return;
         }
 
         isShutdownInProgress = true;
 
+        ResultHandler resultHandler;
+        if (shutdownCompletedHandler != null) {
+            resultHandler = () -> {
+                shutdownCompletedHandler.run();
+                onShutdown.handleResult();
+            };
+        } else {
+            resultHandler = onShutdown;
+        }
+
         if (injector == null) {
             log.info("Shut down called before injector was created");
             resultHandler.handleResult();
@@ -281,7 +317,7 @@ public abstract class HavenoExecutable implements GracefulShutDownHandler, Haven
             injector.getInstance(XmrTxProofService.class).shutDown();
             injector.getInstance(AvoidStandbyModeService.class).shutDown();
             injector.getInstance(TradeManager.class).shutDown();
-            injector.getInstance(XmrWalletService.class).shutDown(); // TODO: why not shut down BtcWalletService, etc? shutdown CoreMoneroConnectionsService
+            injector.getInstance(XmrWalletService.class).shutDown(!isReadOnly); // TODO: why not shut down BtcWalletService, etc? shutdown CoreMoneroConnectionsService
             log.info("OpenOfferManager shutdown started");
             injector.getInstance(OpenOfferManager.class).shutDown(() -> {
                 log.info("OpenOfferManager shutdown completed");
@@ -296,36 +332,31 @@ public abstract class HavenoExecutable implements GracefulShutDownHandler, Haven
                     injector.getInstance(P2PService.class).shutDown(() -> {
                         log.info("P2PService shutdown completed");
                         module.close(injector);
-                        completeShutdown(resultHandler, EXIT_SUCCESS);
+                        completeShutdown(resultHandler, EXIT_SUCCESS, systemExit);
                     });
                 });
                 walletsSetup.shutDown();
-
             });
-
-            // Wait max 20 sec.
-            UserThread.runAfter(() -> {
-                log.warn("Graceful shut down not completed in 20 sec. We trigger our timeout handler.");
-                completeShutdown(resultHandler, EXIT_SUCCESS);
-            }, 20);
         } catch (Throwable t) {
             log.error("App shutdown failed with exception {}", t.toString());
             t.printStackTrace();
-            completeShutdown(resultHandler, EXIT_FAILURE);
+            completeShutdown(resultHandler, EXIT_FAILURE, systemExit);
         }
     }
 
-    private void completeShutdown(ResultHandler resultHandler, int exitCode) {
+    private void completeShutdown(ResultHandler resultHandler, int exitCode, boolean systemExit) {
         if (!isReadOnly) {
             // If user tried to downgrade we do not write the persistable data to avoid data corruption
             PersistenceManager.flushAllDataToDiskAtShutdown(() -> {
                 log.info("Graceful shutdown flushed persistence. Exiting now.");
                 resultHandler.handleResult();
-                UserThread.runAfter(() -> System.exit(exitCode), 1);
+                if (systemExit)
+                    UserThread.runAfter(() -> System.exit(exitCode), 1);
             });
         } else {
             resultHandler.handleResult();
-            UserThread.runAfter(() -> System.exit(exitCode), 1);
+            if (systemExit)
+                UserThread.runAfter(() -> System.exit(exitCode), 1);
         }
     }
 
@@ -341,4 +372,46 @@ public abstract class HavenoExecutable implements GracefulShutDownHandler, Haven
         if (doShutDown)
             gracefulShutDown(() -> log.info("gracefulShutDown complete"));
     }
+
+    /**
+     * Runs until a command interrupts the application and returns the desired command behavior.
+     * @return EXIT_SUCCESS to initiate a shutdown, EXIT_RESTART to initiate an in process restart.
+     */
+    protected int keepRunning() {
+        keepRunningThread = new Thread(() -> {
+            ConsoleInput reader = new ConsoleInput(Integer.MAX_VALUE, Integer.MAX_VALUE, TimeUnit.MILLISECONDS);
+            while (true) {
+                Console console = System.console();
+                try {
+                    if (console == null) {
+                        Thread.sleep(Long.MAX_VALUE);
+                    } else {
+                        var cmd = reader.readLine();
+                        if ("exit".equals(cmd)) {
+                            keepRunningResult.set(EXIT_SUCCESS);
+                            break;
+                        } else if ("restart".equals(cmd)) {
+                            keepRunningResult.set(EXIT_RESTART);
+                            break;
+                        } else if ("help".equals(cmd)) {
+                            System.out.println("Commands: restart, exit, help");
+                        } else {
+                            System.out.println("Unknown command, use: restart, exit, help");
+                        }
+                    }
+                } catch (InterruptedException e) {
+                    break;
+                }
+            }
+        });
+
+        keepRunningThread.start();
+        try {
+            keepRunningThread.join();
+        } catch (InterruptedException ie) {
+            System.out.println(ie);
+        }
+
+        return keepRunningResult.get();
+    }
 }

core/src/main/java/bisq/core/app/HavenoHeadlessAppMain.java

@@ -47,10 +47,10 @@ public class HavenoHeadlessAppMain extends HavenoExecutable {
     }
 
     @Override
-    protected void doExecute() {
+    protected int doExecute() {
         super.doExecute();
 
-        keepRunning();
+        return keepRunning();
     }
 
     ///////////////////////////////////////////////////////////////////////////////////////////
@@ -114,14 +114,4 @@ public class HavenoHeadlessAppMain extends HavenoExecutable {
         // In headless mode we don't have an async behaviour so we trigger the setup by calling onApplicationStarted
         onApplicationStarted();
     }
-
-    // TODO: implement interactive console which allows user to input commands; login, logoff, exit
-    private void keepRunning() {
-        while (true) {
-            try {
-                Thread.sleep(Long.MAX_VALUE);
-            } catch (InterruptedException ignore) {
-            }
-        }
-    }
 }

core/src/main/java/bisq/core/app/misc/ExecutableForAppWithP2p.java

@@ -97,7 +97,7 @@ public abstract class ExecutableForAppWithP2p extends HavenoExecutable {
                         });
                     });
                     injector.getInstance(WalletsSetup.class).shutDown();
-                    injector.getInstance(XmrWalletService.class).shutDown(); // TODO (woodser): this is not actually called, perhaps because WalletsSetup.class completes too quick so its listener calls System.exit(0)
+                    injector.getInstance(XmrWalletService.class).shutDown(true); // TODO (woodser): this is not actually called, perhaps because WalletsSetup.class completes too quick so its listener calls System.exit(0)
                     injector.getInstance(BtcWalletService.class).shutDown();
                 }));
                 // we wait max 5 sec.
@@ -187,16 +187,6 @@ public abstract class ExecutableForAppWithP2p extends HavenoExecutable {
         }, TimeUnit.HOURS.toSeconds(2));
     }
 
-    @SuppressWarnings("InfiniteLoopStatement")
-    protected void keepRunning() {
-        while (true) {
-            try {
-                Thread.sleep(Long.MAX_VALUE);
-            } catch (InterruptedException ignore) {
-            }
-        }
-    }
-
     protected void checkMemory(Config config, GracefulShutDownHandler gracefulShutDownHandler) {
         int maxMemory = config.maxMemory;
         UserThread.runPeriodically(() -> {

core/src/main/java/bisq/core/btc/setup/MoneroWalletRpcManager.java

@@ -113,13 +113,15 @@ public class MoneroWalletRpcManager {
   public void stopInstance(MoneroWalletRpc walletRpc) {
 
       // unregister port
+      int port = -1;
       synchronized (registeredPorts) {
           boolean found = false;
           for (Map.Entry<Integer, MoneroWalletRpc> entry : registeredPorts.entrySet()) {
               if (walletRpc == entry.getValue()) {
                   found = true;
                   try {
-                      unregisterPort(entry.getKey());
+                      port = entry.getKey();
+                      unregisterPort(port);
                   } catch (Exception e) {
                       throw new MoneroError(e);
                   }
@@ -130,6 +132,8 @@ public class MoneroWalletRpcManager {
       }
 
       // stop process
+      String pid = walletRpc.getProcess() == null ? null : String.valueOf(walletRpc.getProcess().pid());
+      log.info("Stopping MoneroWalletRpc port: {} pid: {}", port, pid);
       walletRpc.stopProcess();
   }
 

core/src/main/java/bisq/core/btc/setup/WalletConfig.java

@@ -252,7 +252,6 @@ public class WalletConfig extends AbstractIdleService {
 
     @Override
     protected void shutDown() throws Exception {
-        
     }
 
     public NetworkParameters params() {

core/src/main/java/bisq/core/btc/wallet/XmrWalletService.java

@@ -146,7 +146,7 @@ public class XmrWalletService {
                 @Override
                 public void onAccountClosed() {
                     log.info(getClass() + ".accountService.onAccountClosed()");
-                    closeAllWallets();
+                    closeAllWallets(true);
                 }
 
                 @Override
@@ -304,7 +304,7 @@ public class XmrWalletService {
 
     /**
      * Thaw the given outputs with a lock on the wallet.
-     * 
+     *
      * @param keyImages the key images to thaw
      */
     public void thawOutputs(Collection<String> keyImages) {
@@ -527,9 +527,9 @@ public class XmrWalletService {
         }
     }
 
-    public void shutDown() {
+    public void shutDown(boolean save) {
         this.isShutDown = true;
-        closeAllWallets();
+        closeAllWallets(save);
     }
 
     // ------------------------------ PRIVATE HELPERS -------------------------
@@ -746,7 +746,7 @@ public class XmrWalletService {
         if (!new File(path + ".address.txt").delete()) throw new RuntimeException("Failed to delete wallet file: " + path);
     }
 
-    private void closeAllWallets() {
+    private void closeAllWallets(boolean save) {
 
         // collect wallets to shutdown
         List<MoneroWallet> openWallets = new ArrayList<MoneroWallet>();

daemon/src/main/java/bisq/daemon/app/HavenoDaemonMain.java

@@ -17,6 +17,7 @@
 
 package bisq.daemon.app;
 
+import bisq.core.app.ConsoleInput;
 import bisq.core.app.HavenoHeadlessAppMain;
 import bisq.core.app.HavenoSetup;
 import bisq.core.api.AccountServiceListener;
@@ -26,6 +27,7 @@ import bisq.common.UserThread;
 import bisq.common.app.AppModule;
 import bisq.common.crypto.IncorrectPasswordException;
 import bisq.common.handlers.ResultHandler;
+import bisq.common.persistence.PersistenceManager;
 
 import com.google.common.util.concurrent.ThreadFactoryBuilder;
 
@@ -34,6 +36,7 @@ import java.util.concurrent.CancellationException;
 import java.util.concurrent.Executors;
 import java.util.concurrent.ThreadFactory;
 import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicBoolean;
 
 import lombok.extern.slf4j.Slf4j;
 
@@ -45,7 +48,28 @@ public class HavenoDaemonMain extends HavenoHeadlessAppMain implements HavenoSet
     private GrpcServer grpcServer;
 
     public static void main(String[] args) {
-        new HavenoDaemonMain().execute(args);
+        var keepRunning = true;
+        while (keepRunning) {
+            keepRunning = false;
+            var daemon = new HavenoDaemonMain();
+            var ret = daemon.execute(args);
+            if (ret == EXIT_SUCCESS) {
+                UserThread.execute(() -> daemon.gracefulShutDown(() -> {}));
+            } else if (ret == EXIT_RESTART) {
+                AtomicBoolean shuttingDown = new AtomicBoolean(true);
+                UserThread.execute(() -> daemon.gracefulShutDown(() -> shuttingDown.set(false), false));
+                keepRunning = true;
+                // wait for graceful shutdown
+                try {
+                    while (shuttingDown.get()) {
+                        Thread.sleep(1000);
+                    }
+                    PersistenceManager.reset();
+                } catch (InterruptedException e) {
+                    System.out.println("interrupted!");
+                }
+            }
+        }
     }
 
     /////////////////////////////////////////////////////////////////////////////////////
@@ -106,8 +130,8 @@ public class HavenoDaemonMain extends HavenoHeadlessAppMain implements HavenoSet
     }
 
     @Override
-    public void gracefulShutDown(ResultHandler resultHandler) {
+    public void gracefulShutDown(ResultHandler resultHandler, boolean exit) {
-        super.gracefulShutDown(resultHandler);
+        super.gracefulShutDown(resultHandler, exit);
         if (grpcServer != null) grpcServer.shutdown(); // could be null if application attempted to shutdown early
     }
 
@@ -120,7 +144,6 @@ public class HavenoDaemonMain extends HavenoHeadlessAppMain implements HavenoSet
 
         // Start rpc server in case login is coming in from rpc
         grpcServer = injector.getInstance(GrpcServer.class);
-        grpcServer.start();
 
         if (!opened) {
             // Nonblocking, we need to stop if the login occurred through rpc.
@@ -129,7 +152,6 @@ public class HavenoDaemonMain extends HavenoHeadlessAppMain implements HavenoSet
             Thread t = new Thread(() -> {
                 interactiveLogin(reader);
             });
-            t.start();
 
             // Handle asynchronous account opens.
             // Will need to also close and reopen account.
@@ -143,10 +165,14 @@ public class HavenoDaemonMain extends HavenoHeadlessAppMain implements HavenoSet
             };
             accountService.addListener(accountListener);
 
+            // start server after the listener is registered
+            grpcServer.start();
+
             try {
                 // Wait until interactive login or rpc. Check one more time if account is open to close race condition.
                 if (!accountService.isAccountOpen()) {
                     log.info("Interactive login required");
+                    t.start();
                     t.join();
                 }
             } catch (InterruptedException e) {
@@ -155,6 +181,8 @@ public class HavenoDaemonMain extends HavenoHeadlessAppMain implements HavenoSet
 
             accountService.removeListener(accountListener);
             opened = accountService.isAccountOpen();
+        } else {
+            grpcServer.start();
         }
 
         return opened;

seednode/src/main/java/bisq/seednode/SeedNodeMain.java

@@ -60,12 +60,12 @@ public class SeedNodeMain extends ExecutableForAppWithP2p {
     }
 
     @Override
-    protected void doExecute() {
+    protected int doExecute() {
         super.doExecute();
 
         checkMemory(config, this);
 
-        keepRunning();
+        return keepRunning();
     }
 
     @Override

statsnode/src/main/java/bisq/statistics/StatisticsMain.java

@@ -40,12 +40,12 @@ public class StatisticsMain extends ExecutableForAppWithP2p {
     }
 
     @Override
-    protected void doExecute() {
+    protected int doExecute() {
         super.doExecute();
 
         checkMemory(config, this);
 
-        keepRunning();
+        return keepRunning();
     }
 
     @Override