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.plugin;
  
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.Date;
  import java.util.Properties;
  
  import javax.management.JMException;
  import javax.management.ObjectName;
  import javax.xml.XMLConstants;
  import jakarta.xml.bind.JAXBContext;
  import jakarta.xml.bind.JAXBElement;
  import jakarta.xml.bind.JAXBException;
  import jakarta.xml.bind.Unmarshaller;
  import javax.xml.parsers.DocumentBuilder;
  import javax.xml.parsers.DocumentBuilderFactory;
  import javax.xml.parsers.ParserConfigurationException;
  import javax.xml.transform.Source;
  import javax.xml.transform.stream.StreamSource;
  import javax.xml.validation.Schema;
  import javax.xml.validation.SchemaFactory;
  
  import org.apache.activemq.broker.Broker;
  import org.apache.activemq.broker.BrokerContext;
  import org.apache.activemq.broker.jmx.ManagementContext;
  import org.apache.activemq.plugin.jmx.RuntimeConfigurationView;
  import org.apache.activemq.schema.core.DtoBroker;
  import org.apache.activemq.spring.Utils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.core.io.Resource;
  import org.w3c.dom.Document;
  import org.w3c.dom.Node;
  import org.xml.sax.SAXException;
  
  public class RuntimeConfigurationBroker extends AbstractRuntimeConfigurationBroker {
  
      public static final Logger LOG = LoggerFactory.getLogger(RuntimeConfigurationBroker.class);
      public static final String objectNamePropsAppendage = ",service=RuntimeConfiguration,name=Plugin";
      PropertiesPlaceHolderUtil placeHolderUtil = null;
      private long checkPeriod;
      private long lastModified = -1;
      private Resource configToMonitor;
      private DtoBroker currentConfiguration;
      private Schema schema;
  
      public RuntimeConfigurationBroker(Broker next) {
          super(next);
      }
  
      @Override
      public void start() throws Exception {
          super.start();
          try {
              BrokerContext brokerContext = next.getBrokerService().getBrokerContext();
              if (brokerContext != null) {
                  configToMonitor = Utils.resourceFromString(brokerContext.getConfigurationUrl());
                  info("Configuration " + configToMonitor);
              } else {
                  LOG.error("Null BrokerContext; impossible to determine configuration url resource from broker, updates cannot be tracked");
              }
          } catch (Exception error) {
              LOG.error("failed to determine configuration url resource from broker, updates cannot be tracked", error);
          }
  
          currentConfiguration = loadConfiguration(configToMonitor);
          monitorModification(configToMonitor);
          registerMbean();
      }
  
      @Override
      protected void registerMbean() {
          if (getBrokerService().isUseJmx()) {
              ManagementContext managementContext = getBrokerService().getManagementContext();
              try {
                  objectName = new ObjectName(getBrokerService().getBrokerObjectName().toString() + objectNamePropsAppendage);
                  managementContext.registerMBean(new RuntimeConfigurationView(this), objectName);
              } catch (Exception ignored) {
                  LOG.debug("failed to register RuntimeConfigurationMBean", ignored);
              }
          }
      }
  
      @Override
      protected void unregisterMbean() {
          if (objectName != null) {
              try {
                  getBrokerService().getManagementContext().unregisterMBean(objectName);
              } catch (JMException ignored) {
              }
          }
      }
  
      public String updateNow() {
          LOG.info("Manual configuration update triggered");
          infoString = "";
          applyModifications(configToMonitor);
          String result = infoString;
          infoString = null;
          return result;
      }
  
      private void monitorModification(final Resource configToMonitor) {
          monitorTask = new Runnable() {
              @Override
              public void run() {
                  try {
                      if (configToMonitor.lastModified() > lastModified) {
                          applyModifications(configToMonitor);
                      }
                  } catch (Throwable e) {
                      LOG.error("Failed to determine lastModified time on configuration: " + configToMonitor, e);
                  }
              }
          };
          if (lastModified > 0 && checkPeriod > 0) {
              this.getBrokerService().getScheduler().executePeriodically(monitorTask, checkPeriod);
              info("Monitoring for updates (every " + checkPeriod + "millis) : " + configToMonitor + ", lastUpdate: " + new Date(lastModified));
          }
      }
  
  
  
      private void applyModifications(Resource configToMonitor) {
          DtoBroker changed = loadConfiguration(configToMonitor);
          if (changed != null && !currentConfiguration.equals(changed)) {
              LOG.info("change in " + configToMonitor + " at: " + new Date(lastModified));
              LOG.debug("current:" + filterPasswords(currentConfiguration));
              LOG.debug("new    :" + filterPasswords(changed));
              processSelectiveChanges(currentConfiguration, changed);
              currentConfiguration = changed;
          } else {
              info("No material change to configuration in " + configToMonitor + " at: " + new Date(lastModified));
          }
      }
  
      private void processSelectiveChanges(DtoBroker currentConfiguration, DtoBroker modifiedConfiguration) {
  
          for (Class upDatable : new Class[]{
                  DtoBroker.DestinationPolicy.class,
                  DtoBroker.NetworkConnectors.class,
                  DtoBroker.DestinationInterceptors.class,
                  DtoBroker.Plugins.class,
                  DtoBroker.Destinations.class}) {
              processChanges(currentConfiguration, modifiedConfiguration, upDatable);
          }
      }
  
      private void processChanges(DtoBroker currentConfiguration, DtoBroker modifiedConfiguration, Class upDatable) {
          ConfigurationProcessor processor = ProcessorFactory.createProcessor(this, upDatable);
          processor.processChanges(currentConfiguration, modifiedConfiguration);
      }
  
  
  
      private DtoBroker loadConfiguration(Resource configToMonitor) {
          DtoBroker jaxbConfig = null;
          if (configToMonitor != null) {
              try {
                  JAXBContext context = JAXBContext.newInstance(DtoBroker.class.getPackageName(), DtoBroker.class.getClassLoader());
                  Unmarshaller unMarshaller = context.createUnmarshaller();
                  unMarshaller.setSchema(getSchema());
  
                  // skip beans and pull out the broker node to validate
                  DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
                  dbf.setNamespaceAware(true);
                  dbf.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, Boolean.TRUE);
                  dbf.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);
  
                  DocumentBuilder db = dbf.newDocumentBuilder();
                  Document doc = db.parse(configToMonitor.getInputStream());
                  Node brokerRootNode = doc.getElementsByTagNameNS("*","broker").item(0);
  
                  if (brokerRootNode != null) {
  
                      JAXBElement<DtoBroker> brokerJAXBElement =
                              unMarshaller.unmarshal(brokerRootNode, DtoBroker.class);
                      jaxbConfig = brokerJAXBElement.getValue();
  
                      // if we can parse we can track mods
                      lastModified = configToMonitor.lastModified();
  
                      loadPropertiesPlaceHolderSupport(doc);
  
                  } else {
                      info("Failed to find 'broker' element by tag in: " + configToMonitor);
                  }
  
              } catch (IOException e) {
                  info("Failed to access: " + configToMonitor, e);
              } catch (JAXBException e) {
                  info("Failed to parse: " + configToMonitor, e);
              } catch (ParserConfigurationException e) {
                  info("Failed to document parse: " + configToMonitor, e);
              } catch (SAXException e) {
                  info("Failed to find broker element in: " + configToMonitor, e);
              } catch (Exception e) {
                  info("Unexpected exception during load of: " + configToMonitor, e);
              }
          }
          return jaxbConfig;
      }
  
      private void loadPropertiesPlaceHolderSupport(Document doc) {
          BrokerContext brokerContext = getBrokerService().getBrokerContext();
          if (brokerContext != null) {
              Properties initialProperties = new Properties(System.getProperties());
              placeHolderUtil = new PropertiesPlaceHolderUtil(initialProperties);
              placeHolderUtil.mergeProperties(doc, initialProperties, brokerContext);
          }
      }
  
      private Schema getSchema() throws SAXException, IOException {
          if (schema == null) {
              SchemaFactory schemaFactory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
              schemaFactory.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);
              schemaFactory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);
  
              ArrayList<StreamSource> schemas = new ArrayList<StreamSource>();
              schemas.add(new StreamSource(getClass().getResource("/activemq.xsd").toExternalForm()));
              if (getClass().getResource("/org/springframework/beans/factory/xml/spring-beans-3.0.xsd") != null) {
                  schemas.add(new StreamSource(getClass().getResource("/org/springframework/beans/factory/xml/spring-beans-3.0.xsd").toExternalForm()));
              } else {
                  schemas.add(new StreamSource(getClass().getResource("/org/springframework/beans/factory/xml/spring-beans.xsd").toExternalForm()));
              }
              schema = schemaFactory.newSchema(schemas.toArray(new Source[]{}));
          }
          return schema;
      }
  
      public long getLastModified() {
          return lastModified;
      }
  
      public Resource getConfigToMonitor() {
          return configToMonitor;
      }
  
      public long getCheckPeriod() {
          return checkPeriod;
      }
  
      public void setCheckPeriod(long checkPeriod) {
          this.checkPeriod = checkPeriod;
      }
  
  }
  