content: /**
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.activemq.util;
  
  import java.io.IOException;
  import java.sql.SQLException;
  import java.util.Map;
  import java.util.concurrent.TimeUnit;
  import java.util.concurrent.atomic.AtomicBoolean;
  
  import org.apache.activemq.broker.BrokerService;
  import org.apache.activemq.broker.SuppressReplyException;
  import org.apache.activemq.broker.region.Destination;
  import org.apache.activemq.broker.region.Queue;
  import org.apache.activemq.broker.region.RegionBroker;
  import org.apache.activemq.command.ActiveMQDestination;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * @org.apache.xbean.XBean
   */
   public class DefaultIOExceptionHandler implements IOExceptionHandler {
  
      private static final Logger LOG = LoggerFactory
              .getLogger(DefaultIOExceptionHandler.class);
      protected BrokerService broker;
      private boolean ignoreAllErrors = false;
      private boolean ignoreNoSpaceErrors = true;
      private boolean ignoreSQLExceptions = true;
      private boolean stopStartConnectors = false;
      private String noSpaceMessage = "space";
      private String sqlExceptionMessage = ""; // match all
      private long resumeCheckSleepPeriod = 5*1000;
      private final AtomicBoolean handlingException = new AtomicBoolean(false);
      private boolean systemExitOnShutdown = false;
  
      @Override
      public void handle(IOException exception) {
          if (!broker.isStarted() || ignoreAllErrors) {
              allowIOResumption();
              LOG.info("Ignoring IO exception, " + exception, exception);
              return;
          }
  
          if (ignoreNoSpaceErrors) {
              Throwable cause = exception;
              while (cause != null && cause instanceof IOException) {
                  String message = cause.getMessage();
                  if (message != null && message.contains(noSpaceMessage)) {
                      LOG.info("Ignoring no space left exception, " + exception, exception);
                      allowIOResumption();
                      return;
                  }
                  cause = cause.getCause();
              }
          }
  
          if (ignoreSQLExceptions) {
              Throwable cause = exception;
              while (cause != null) {
                  if (cause instanceof SQLException) {
                      String message = cause.getMessage();
  
                      if (message == null) {
                          message = "";
                      }
  
                      if (message.contains(sqlExceptionMessage)) {
                          LOG.info("Ignoring SQLException, " + exception, cause);
                          return;
                      }
                  }
                  cause = cause.getCause();
              }
          }
  
          if (stopStartConnectors) {
              if (handlingException.compareAndSet(false, true)) {
                  LOG.info("Initiating stop/restart of transports on " + broker + " due to IO exception, " + exception, exception);
  
                  new Thread("IOExceptionHandler: stop transports") {
                      @Override
                      public void run() {
                          try {
                              ServiceStopper stopper = new ServiceStopper();
                              broker.stopAllConnectors(stopper);
                              LOG.info("Successfully stopped transports on " + broker);
                          } catch (Exception e) {
                              LOG.warn("Failure occurred while stopping broker connectors", e);
                          } finally {
                              // resume again
                              new Thread("IOExceptionHandler: restart transports") {
                                  @Override
                                  public void run() {
                                      try {
                                          allowIOResumption();
                                          while (hasLockOwnership() && isPersistenceAdapterDown()) {
                                              LOG.info("waiting for broker persistence adapter checkpoint to succeed before restarting transports");
                                              TimeUnit.MILLISECONDS.sleep(resumeCheckSleepPeriod);
                                          }
                                          if (hasLockOwnership()) {
                                              Map<ActiveMQDestination, Destination> destinations = ((RegionBroker)broker.getRegionBroker()).getDestinationMap();
                                              for (Destination destination : destinations.values()) {
  
                                                  if (destination instanceof Queue) {
                                                      Queue queue = (Queue)destination;
                                                      if (queue.isResetNeeded()) {
                                                          queue.clearPendingMessages(0);
                                                      }
                                                  }
                                              }
                                              broker.startAllConnectors();
                                              LOG.info("Successfully restarted transports on " + broker);
                                          }
                                      } catch (Exception e) {
                                          LOG.warn("Stopping " + broker + " due to failure restarting transports", e);
                                          stopBroker(e);
                                      } finally {
                                          handlingException.compareAndSet(true, false);
                                      }
                                  }
  
                                  private boolean isPersistenceAdapterDown() {
                                      boolean checkpointSuccess = false;
                                      try {
                                          broker.getPersistenceAdapter().checkpoint(true);
                                          checkpointSuccess = true;
                                      } catch (Throwable ignored) {
                                      }
                                      return !checkpointSuccess;
                                  }
                              }.start();
  
  
                          }
                      }
                  }.start();
              }
  
              throw new SuppressReplyException("Stop/RestartTransportsInitiated", exception);
          }
  
          if (handlingException.compareAndSet(false, true)) {
              stopBroker(exception);
          }
  
          // we don't want to propagate the exception back to the client
          // They will see a delay till they see a disconnect via socket.close
          // at which point failover: can kick in.
          throw new SuppressReplyException("ShutdownBrokerInitiated", exception);
      }
  
      protected void allowIOResumption() {
          try {
              if (broker.getPersistenceAdapter() != null) {
                  broker.getPersistenceAdapter().allowIOResumption();
              }
          } catch (IOException e) {
              LOG.warn("Failed to allow IO resumption", e);
          }
      }
  
      private void stopBroker(Exception exception) {
          LOG.info("Stopping " + broker + " due to exception, " + exception, exception);
          new Thread("IOExceptionHandler: stopping " + broker) {
              @Override
              public void run() {
                  try {
                      if( broker.isRestartAllowed() ) {
                          broker.requestRestart();
                      }
                      broker.setSystemExitOnShutdown(isSystemExitOnShutdown());
                      broker.stop();
                  } catch (Exception e) {
                      LOG.warn("Failure occurred while stopping broker", e);
                  }
              }
          }.start();
      }
  
      protected boolean hasLockOwnership() throws IOException {
          return true;
      }
  
      @Override
      public void setBrokerService(BrokerService broker) {
          this.broker = broker;
      }
  
      public boolean isIgnoreAllErrors() {
          return ignoreAllErrors;
      }
  
      public void setIgnoreAllErrors(boolean ignoreAllErrors) {
          this.ignoreAllErrors = ignoreAllErrors;
      }
  
      public boolean isIgnoreNoSpaceErrors() {
          return ignoreNoSpaceErrors;
      }
  
      public void setIgnoreNoSpaceErrors(boolean ignoreNoSpaceErrors) {
          this.ignoreNoSpaceErrors = ignoreNoSpaceErrors;
      }
  
      public String getNoSpaceMessage() {
          return noSpaceMessage;
      }
  
      public void setNoSpaceMessage(String noSpaceMessage) {
          this.noSpaceMessage = noSpaceMessage;
      }
  
      public boolean isIgnoreSQLExceptions() {
          return ignoreSQLExceptions;
      }
  
      public void setIgnoreSQLExceptions(boolean ignoreSQLExceptions) {
          this.ignoreSQLExceptions = ignoreSQLExceptions;
      }
  
      public String getSqlExceptionMessage() {
          return sqlExceptionMessage;
      }
  
      public void setSqlExceptionMessage(String sqlExceptionMessage) {
          this.sqlExceptionMessage = sqlExceptionMessage;
      }
  
      public boolean isStopStartConnectors() {
          return stopStartConnectors;
      }
  
      public void setStopStartConnectors(boolean stopStartConnectors) {
          this.stopStartConnectors = stopStartConnectors;
      }
  
      public long getResumeCheckSleepPeriod() {
          return resumeCheckSleepPeriod;
      }
  
      public void setResumeCheckSleepPeriod(long resumeCheckSleepPeriod) {
          this.resumeCheckSleepPeriod = resumeCheckSleepPeriod;
      }
  
      public void setSystemExitOnShutdown(boolean systemExitOnShutdown) {
          this.systemExitOnShutdown = systemExitOnShutdown;
      }
  
      public boolean isSystemExitOnShutdown() {
          return systemExitOnShutdown;
      }
  }
  