/**
    * This file Copyright (c) 2003-2012 Magnolia International
    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
    *
    *
    * This file is dual-licensed under both the Magnolia
    * Network Agreement and the GNU General Public License.
    * You may elect to use one or the other of these licenses.
    *
   * This file is distributed in the hope that it will be
   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
   * implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
   * Redistribution, except as permitted by whichever of the GPL
   * or MNA you select, is prohibited.
   *
   * 1. For the GPL license (GPL), you can redistribute and/or
   * modify this file under the terms of the GNU General
   * Public License, Version 3, as published by the Free Software
   * Foundation.  You should have received a copy of the GNU
   * General Public License, Version 3 along with this program;
   * if not, write to the Free Software Foundation, Inc., 51
   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * 2. For the Magnolia Network Agreement (MNA), this file
   * and the accompanying materials are made available under the
   * terms of the MNA which accompanies this distribution, and
   * is available at http://www.magnolia-cms.com/mna.html
   *
   * Any modifications to this file must keep this entire header
   * intact.
   *
   */
  package info.magnolia.module.exchangesimple;
  
  import info.magnolia.cms.core.Content;
  import info.magnolia.cms.core.HierarchyManager;
  import info.magnolia.cms.core.ItemType;
  import info.magnolia.cms.core.MetaData;
  import info.magnolia.cms.core.SystemProperty;
  import info.magnolia.cms.core.version.ContentVersion;
  import info.magnolia.cms.exchange.ExchangeException;
  import info.magnolia.cms.exchange.Subscriber;
  import info.magnolia.cms.exchange.Subscription;
  import info.magnolia.cms.exchange.Syndicator;
  import info.magnolia.cms.security.AccessDeniedException;
  import info.magnolia.cms.security.SecurityUtil;
  import info.magnolia.cms.security.User;
  import info.magnolia.cms.util.ContentUtil;
  import info.magnolia.cms.util.Rule;
  import info.magnolia.cms.util.RuleBasedContentFilter;
  import info.magnolia.context.MgnlContext;
  import info.magnolia.init.MagnoliaConfigurationProperties;
  import info.magnolia.logging.AuditLoggingUtil;
  import info.magnolia.module.exchangesimple.monitor.ActivationMonitor;
  import info.magnolia.objectfactory.Components;
  
  import java.io.File;
  import java.io.IOException;
  import java.io.UnsupportedEncodingException;
  import java.net.HttpURLConnection;
  import java.net.MalformedURLException;
  import java.net.URL;
  import java.net.URLConnection;
  import java.net.URLEncoder;
  import java.util.Calendar;
  import java.util.Iterator;
  import java.util.List;
  
  import javax.jcr.RepositoryException;
  import javax.jcr.Session;
  
  import org.apache.commons.lang.StringUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import EDU.oswego.cs.dl.util.concurrent.Sync;
  
  import com.google.inject.Inject;
  
  /**
   * Default implementation of {@link Syndicator}. Activates all the content to a subscriber configured on the server.
   * 
   * @author Sameer Charles
   * $Id: $
   */
  public abstract class BaseSyndicatorImpl implements Syndicator {
      private static final Logger log = LoggerFactory.getLogger(BaseSyndicatorImpl.class);
  
      /**
       * URI used for activation.
       */
      public static final String DEFAULT_HANDLER = ".magnolia/activation";
  
      public static final String PARENT_PATH = "mgnlExchangeParentPath";
  
      public static final String MAPPED_PARENT_PATH = "mgnlExchangeMappedParent";
  
      /**
      * Path to be activated or deactivated.
      */
     public static final String PATH = "mgnlExchangePath";
 
     public static final String NODE_UUID = "mgnlExchangeNodeUUID";
 
     /**
      * @deprecated since 4.5 - use logical workspace instead.
      */
     @Deprecated
     public static final String REPOSITORY_NAME = "mgnlExchangeRepositoryName";
 
     public static final String WORKSPACE_NAME = "mgnlExchangeWorkspaceName";
 
     public static final String VERSION_NAME = "mgnlExchangeVersionName";
 
     /**
      * Name of the resource containing reading sequence for importing the data in activation target.
      */
     public static final String RESOURCE_MAPPING_FILE = "mgnlExchangeResourceMappingFile";
 
     public static final String UTF8_STATUS = "mgnlUTF8Status";
 
     /**
      * Name of the element in the resource file describing siblings of activated node.
      * Siblings element will contain all siblings of the same node type which are "before"
      * this node.
      */
     public static final String SIBLINGS_ROOT_ELEMENT = "NodeSiblings";
 
     public static final String SIBLINGS_ELEMENT = "sibling";
 
     public static final String SIBLING_UUID = "siblingUUID";
 
     public static final String RESOURCE_MAPPING_FILE_ELEMENT = "File";
 
     public static final String RESOURCE_MAPPING_NAME_ATTRIBUTE = "name";
 
     public static final String RESOURCE_MAPPING_UUID_ATTRIBUTE = "contentUUID";
 
     public static final String RESOURCE_MAPPING_ID_ATTRIBUTE = "resourceId";
 
     public static final String RESOURCE_MAPPING_MD_ATTRIBUTE = "resourceMD";
 
     public static final String RESOURCE_MAPPING_ROOT_ELEMENT = "Resources";
 
     public static final String ACTION = "mgnlExchangeAction";
 
     public static final String ACTIVATE = "activate";
 
     public static final String DEACTIVATE = "deactivate";
 
     public static final String COMMIT = "commit";
 
     public static final String ROLLBACK = "rollback";
 
     public static final String CONTENT_FILTER_RULE = "mgnlExchangeFilterRule";
 
     public static final String ACTIVATION_SUCCESSFUL = "sa_success";
 
     public static final String ACTIVATION_HANDSHAKE = "sa_handshake";
 
     public static final String ACTIVATION_FAILED = "sa_failed";
 
     public static final String ACTIVATION_ATTRIBUTE_STATUS = "sa_attribute_status";
 
     public static final String ACTIVATION_ATTRIBUTE_MESSAGE = "sa_attribute_message";
 
     public static final String ACTIVATION_ATTRIBUTE_VERSION = "sa_attribute_version";
 
     public static final String ACTIVATION_AUTH = "X-magnolia-act-auth";
     public static final String ACTIVATION_AUTH_KEY = "X-magnolia-act-auth-init";
 
     protected ActivationMonitor activationMonitor;
 
     public BaseSyndicatorImpl() {
         this(Components.getComponent(ActivationMonitor.class));
     }
 
     @Inject
     public BaseSyndicatorImpl(ActivationMonitor activationMonitor) {
         this.activationMonitor = activationMonitor;
     }
 
     /**
      * Runs a given job in the thread pool.
      * 
      * @param job the job to run
      * @throws ExchangeException if the job could not be put in the pool
      */
     protected static void executeInPool(Runnable job) throws ExchangeException {
         try {
             ThreadPool.getInstance().execute(job);
         } catch (InterruptedException e) {
             // this is kind of a problem, we could not add the job to the pool
             // retrying might or might not work now that the interruption
             // status is cleared but there is not much we can do so throwing
             // an ExchangeException seems like the least bad choice
             String message = "could not execute job in pool";
             log.error(message, e);
             throw new ExchangeException(message, e);
         }
     }
 
     /**
      * Acquires a {@link Sync} ignoring any interruptions. Should any
      * interruption occur the interruption status will be set. Might
      * potentially block/wait forever.
      * 
      * @see Sync#acquire()
      * @param latch the latch on which to wait
      */
     protected static void acquireIgnoringInterruption(Sync latch) {
         try {
             latch.acquire();
         } catch (InterruptedException e) {
             // waken up externally - ignore try again
             acquireIgnoringInterruption(latch);
             // be a good citizen and set back the interruption status
             Thread.currentThread().interrupt();
         }
     }
 
     /**
      * @deprecated since 4.5 - should no longer be needed when operating with logical workspace names
      */
     @Deprecated
     protected String repositoryName;
 
     protected String workspaceName;
 
     protected String parent;
 
     protected Rule contentFilterRule;
 
     protected User user;
 
     private Calendar contentVersionDate;
 
     private MagnoliaConfigurationProperties properties;
 
     private ResourceCollector resourceCollector;
 
     /**
      * @param user
      * @param repositoryName repository ID
      * @param workspaceName workspace ID
      * @param rule content filter rule
      * @see info.magnolia.cms.exchange.Syndicator#init(info.magnolia.cms.security.User, String, String, info.magnolia.cms.util.Rule)
      */
     @Override
     public void init(User user, String repositoryName, String workspaceName, Rule rule) {
         this.user = user;
         this.contentFilterRule = rule;
         this.repositoryName = repositoryName;
         this.workspaceName = workspaceName;
     }
 
     /**
      * This will activate specifies page (sub pages) to all configured subscribers.
      * 
      * @param parent parent under which this page will be activated
      * @param content to be activated
      * @throws javax.jcr.RepositoryException
      * @throws info.magnolia.cms.exchange.ExchangeException
      */
     @Override
     public void activate(String parent, Content content) throws ExchangeException, RepositoryException {
         this.activate(parent, content, null);
     }
 
     /**
      * This will activate specified node to all configured subscribers.
      * 
      * @param parent parent under which this page will be activated
      * @param content to be activated
      * @param orderBefore List of UUID to be used by the implementation to order this node after activation
      * @throws javax.jcr.RepositoryException
      * @throws info.magnolia.cms.exchange.ExchangeException
      */
     @Override
     public void activate(String parent, Content content, List<String> orderBefore) throws ExchangeException, RepositoryException {
         this.activate(null, parent, content, orderBefore);
     }
 
     /**
      * This will activate specifies page (sub pages) to the specified subscriber.
      * 
      * @param subscriber
      * @param parent parent under which this page will be activated
      * @param content to be activated
      * @throws javax.jcr.RepositoryException
      * @throws info.magnolia.cms.exchange.ExchangeException
      */
     @Override
     public void activate(Subscriber subscriber, String parent, Content content) throws ExchangeException, RepositoryException {
         this.activate(subscriber, parent, content, null);
     }
 
     /**
      * This will activate specifies node to the specified subscriber.
      * 
      * @param subscriber
      * @param parent parent under which this page will be activated
      * @param content to be activated
      * @param orderBefore List of UUID to be used by the subscriber to order this node after activation
      * @throws javax.jcr.RepositoryException
      * @throws info.magnolia.cms.exchange.ExchangeException
      */
     @Override
     public void activate(Subscriber subscriber, String parent, Content content, List<String> orderBefore) throws ExchangeException, RepositoryException {
         this.parent = parent;
         String path = content.getHandle();
 
         if (content instanceof ContentVersion) {
             contentVersionDate = ((ContentVersion) content).getCreated();
         }
 
         ActivationContent activationContent = null;
         try {
             activationContent = resourceCollector.collect(content, orderBefore, parent, workspaceName, repositoryName, contentFilterRule);
             if (null == subscriber) {
                 this.activate(activationContent, path);
             } else {
                 this.activate(subscriber, activationContent, path);
             }
             if (Boolean.parseBoolean(activationContent.getproperty(ItemType.DELETED_NODE_MIXIN))) {
                 final HierarchyManager hm = content.getHierarchyManager();
                 final Session session = content.getJCRNode().getSession();
                 String uuid = content.getUUID();
                 if (StringUtils.isNotBlank(uuid)) {
                     if (content instanceof ContentVersion) {
                         // replace versioned content with the real node
                         content = hm.getContentByUUID(uuid);
                     }
                     Content parentContent = content.getParent();
                     content.delete();
                     parentContent.save();
                 } else {
                     log.warn("Content {}:{} was already removed.", new String[] { content.getWorkspace().getName(), path });
                 }
             } else {
                 this.updateActivationDetails(path);
             }
             log.info("Exchange: activation succeeded [{}]", path);
         } catch (Exception e) {
             if (log.isDebugEnabled()) {
                 log.error("Exchange: activation failed for path:" + (path != null ? path : "[null]"), e);
                 long timestamp = System.currentTimeMillis();
                 log.warn("moving files from failed activation to *.failed" + timestamp);
                 Iterator<File> keys = activationContent.getFiles().values().iterator();
                 while (keys.hasNext()) {
                     File f = keys.next();
                     f.renameTo(new File(f.getAbsolutePath() + ".failed" + timestamp));
                 }
                 activationContent.getFiles().clear();
 
             }
             throw new ExchangeException(e);
         } finally {
             log.debug("Cleaning temporary files");
             cleanTemporaryStore(activationContent);
         }
     }
 
     /**
      * @throws ExchangeException
      */
     public abstract void activate(ActivationContent activationContent, String nodePath) throws ExchangeException;
 
     /**
      * Send request of activation of activationContent to the subscriber. Subscriber might choose not to react if it is not subscribed to the URI under which activationContent exists.
      */
     public String activate(Subscriber subscriber, ActivationContent activationContent, String nodePath) throws ExchangeException {
         // FYI: this method is invoked from multiple threads at a same time (one for each subscriber, activationContent is assumed to be NOT shared between threads (cloned or by other means replicated) )
         log.debug("activate");
         if (null == subscriber) {
             throw new ExchangeException("Null Subscriber");
         }
         // Start measuring
         long start = System.currentTimeMillis();
 
         boolean success = true;
         for (File f : activationContent.getFiles().values()) {
             activationMonitor.addSizeOfActivatedContent(f.length());
         }
 
         String parentPath = null;
 
         // concurrency: from path and repo name are same for all subscribers
         Subscription subscription = subscriber.getMatchedSubscription(nodePath, this.repositoryName);
         if (null != subscription) {
             // its subscribed since we found the matching subscription
             parentPath = this.getMappedPath(this.parent, subscription);
             activationContent.setProperty(PARENT_PATH, parentPath);
         } else {
             log.debug("Exchange : subscriber [{}] is not subscribed to {}", subscriber.getName(), nodePath);
             return "not subscribed";
         }
         log.debug("Exchange : sending activation request to {} with user {}", subscriber.getName(), this.user.getName());
 
         URLConnection urlConnection = null;
         String versionName = null;
         try {
             urlConnection = prepareConnection(subscriber, getActivationURL(subscriber));
             versionName = transportActivatedData(activationContent, urlConnection, null);
 
             String status = urlConnection.getHeaderField(ACTIVATION_ATTRIBUTE_STATUS);
 
             if (StringUtils.equals(status, ACTIVATION_HANDSHAKE)) {
                 String handshakeKey = urlConnection.getHeaderField(ACTIVATION_AUTH);
                 // receive all pending data
                 urlConnection.getContent();
 
                 // transport the data again
                 urlConnection = prepareConnection(subscriber, getActivationURL(subscriber));
                 // and get the version & status again
                 versionName = transportActivatedData(activationContent, urlConnection, handshakeKey);
                 status = urlConnection.getHeaderField(ACTIVATION_ATTRIBUTE_STATUS);
             }
 
             // check if the activation failed
             if (StringUtils.equals(status, ACTIVATION_FAILED)) {
                 String message = urlConnection.getHeaderField(ACTIVATION_ATTRIBUTE_MESSAGE);
                 throw new ExchangeException("Message received from subscriber: " + message);
             }
             urlConnection.getContent();
             log.debug("Exchange : activation request sent to {}", subscriber.getName());
         } catch (ExchangeException e) {
             activationMonitor.logError(nodePath, user.getName(), workspaceName, subscriber.getName(), e, false);
             success = false;
             throw e;
         } catch (IOException e) {
             log.debug("Failed to transport following activated content {" + StringUtils.join(activationContent.getProperties().keySet().iterator(), ',') + "} due to " + e.getMessage(), e);
             String url = urlConnection == null ? null : urlConnection.getURL().toString();
             url = SecurityUtil.stripPasswordFromUrl(url);
             activationMonitor.logError(nodePath, user.getName(), workspaceName, subscriber.getName(), e, false);
             success = false;
             // hide pwd if present
             throw new ExchangeException("Not able to send the activation request [" + url + "]: " + e.getMessage(), e);
         } catch (Exception e) {
             activationMonitor.logError(nodePath, user.getName(), workspaceName, subscriber.getName(), e, false);
             success = false;
             throw new ExchangeException(e);
         } finally {
             long end = System.currentTimeMillis();
             activationMonitor.addActivationTime(end - start);
             activationMonitor.logActivation(nodePath, user.getName(), workspaceName, subscriber.getName(), false, success);
         }
         return versionName;
     }
 
     private String transportActivatedData(ActivationContent activationContent, URLConnection urlConnection, String handshakeKey) throws ExchangeException {
         String versionName;
         this.addActivationHeaders(urlConnection, activationContent, handshakeKey);
 
         Transporter.transport((HttpURLConnection) urlConnection, activationContent);
 
         versionName = urlConnection.getHeaderField(ACTIVATION_ATTRIBUTE_VERSION);
         return versionName;
     }
 
     /**
      * Cleans up temporary file store after activation.
      */
     protected void cleanTemporaryStore(ActivationContent activationContent) {
         if (activationContent == null) {
             log.debug("Clean temporary store - nothing to do");
             return;
         }
         if (log.isDebugEnabled()) {
             log.debug("Debugging is enabled. Keeping temporary files in store for debugging purposes. Clean the store manually once done with debugging.");
             return;
         }
 
         Iterator<String> keys = activationContent.getFiles().keySet().iterator();
         while (keys.hasNext()) {
             String key = keys.next();
             log.debug("Removing temporary file {}", key);
             activationContent.getFile(key).delete();
         }
     }
 
     public synchronized void deactivate(String path) throws ExchangeException, RepositoryException {
         final Content node = getHierarchyManager().getContent(path);
         deactivate(node);
     }
 
     /**
      * @param node to deactivate
      * @throws RepositoryException
      * @throws ExchangeException
      */
     @Override
     public synchronized void deactivate(Content node) throws ExchangeException, RepositoryException {
         String nodeUUID = node.getUUID();
         String path = node.getHandle();
         this.doDeactivate(nodeUUID, path);
         updateDeactivationDetails(nodeUUID);
     }
 
     /**
      * @param node , to deactivate
      * @param subscriber
      * @throws RepositoryException
      * @throws ExchangeException
      */
     @Override
     public synchronized void deactivate(Subscriber subscriber, Content node) throws ExchangeException, RepositoryException {
         String nodeUUID = node.getUUID();
         String path = node.getHandle();
         this.doDeactivate(subscriber, nodeUUID, path);
         updateDeactivationDetails(nodeUUID);
     }
 
     /**
      * @throws ExchangeException
      */
     public abstract void doDeactivate(String nodeUUID, String nodePath) throws ExchangeException;
 
     /**
      * Deactivate content from specified subscriber.
      * 
      * @param subscriber
      * @throws ExchangeException
      */
     public abstract String doDeactivate(Subscriber subscriber, String nodeUUID, String nodePath) throws ExchangeException;
 
     /**
      * Return URI set for deactivation.
      * 
      * @param subscriberInfo
      */
     protected String getDeactivationURL(Subscriber subscriberInfo) {
         return getActivationURL(subscriberInfo);
     }
 
     /**
      * Adds header fields describing deactivation request.
      * 
      * @param connection
      * @param handshakeKey
      * optional key to encrypt public key before sending it over
      */
     protected void addDeactivationHeaders(URLConnection connection, String nodeUUID, String handshakeKey) {
         connection.addRequestProperty(REPOSITORY_NAME, this.repositoryName);
         connection.addRequestProperty(WORKSPACE_NAME, this.workspaceName);
         // TODO: how can this ever be null?? We don't send path along anywhere, so there's no way to delete anything w/o uuid, which means we pbly do not support deactivation of content w/o UUID!!!
         String md5 = "";
         if (nodeUUID != null) {
             connection.addRequestProperty(NODE_UUID, nodeUUID);
             // send md5 of uuid ... it would be silly to send clear text along the encrypted message
             md5 = SecurityUtil.getMD5Hex(nodeUUID);
         }
         // send md5 of uuid ... it would be silly to send clear text along the encrypted message
         String pass = System.currentTimeMillis() + ";" + this.user.getName() + ";" + md5;
 
         // optional
         addHandshakeInfo(connection, handshakeKey);
 
         connection.setRequestProperty(ACTIVATION_AUTH, SecurityUtil.encrypt(pass));
         connection.addRequestProperty(ACTION, DEACTIVATE);
     }
 
     protected void addHandshakeInfo(URLConnection connection, String handshakeKey) {
         if (handshakeKey != null) {
             connection.setRequestProperty(ACTIVATION_AUTH_KEY, SecurityUtil.encrypt(SecurityUtil.getPublicKey(), handshakeKey));
         }
     }
 
     /**
      * Retrieves URL subscriber is listening on for (de)activation requests.
      */
     protected String getActivationURL(Subscriber subscriberInfo) {
         final String url = subscriberInfo.getURL();
         if (!url.endsWith("/")) {
             return url + "/" + DEFAULT_HANDLER;
         }
         return url + DEFAULT_HANDLER;
     }
 
     /**
      * Adds headers fields describing activation request.
      * 
      * @param handshakeKey
      * Optional key previously received from subscriber, used to encrypt activation public key for delivery to said subscriber. Or null when such key is not known or present.
      */
     protected void addActivationHeaders(URLConnection connection, ActivationContent activationContent, String handshakeKey) {
 
         String md5 = activationContent.getproperty(RESOURCE_MAPPING_MD_ATTRIBUTE);
         String pass = System.currentTimeMillis() + ";" + this.user.getName() + ";" + md5;
         activationContent.setProperty(ACTIVATION_AUTH, SecurityUtil.encrypt(pass));
         Iterator<String> headerKeys = activationContent.getProperties().keySet().iterator();
         while (headerKeys.hasNext()) {
             String key = headerKeys.next();
             if (RESOURCE_MAPPING_MD_ATTRIBUTE.equals(key)) {
                 // do not send md5 in plain string
                 continue;
             }
             String value = activationContent.getproperty(key);
             if (SystemProperty.getBooleanProperty(SystemProperty.MAGNOLIA_UTF8_ENABLED)) {
                 try {
                     value = URLEncoder.encode(value, "UTF-8");
                 } catch (UnsupportedEncodingException e) {
                     // do nothing
                 }
             }
             connection.setRequestProperty(key, value);
         }
         addHandshakeInfo(connection, handshakeKey);
     }
 
     /**
      * Updates current content activation meta data with the time stamp and user details of the activation.
      */
     protected void updateActivationDetails(String path) throws RepositoryException {
         // page activated already use system context to ensure meta data is activated even if activating user has no rights to the activated page children
         Content page = getSystemHierarchyManager().getContent(path);
         updateMetaData(page, ACTIVATE);
         page.save();
         AuditLoggingUtil.log(AuditLoggingUtil.ACTION_ACTIVATE, this.workspaceName, page.getItemType(), path);
     }
 
     /**
      * Updates current content activation meta data with the timestamp and user details of the deactivation.
      */
     protected void updateDeactivationDetails(String nodeUUID) throws RepositoryException {
         // page deactivated already use system context to ensure meta data is activated even if activating user has no rights to the activated page children
         Content page = getSystemHierarchyManager().getContentByUUID(nodeUUID);
         updateMetaData(page, DEACTIVATE);
         page.save();
         AuditLoggingUtil.log(AuditLoggingUtil.ACTION_DEACTIVATE, this.workspaceName, page.getItemType(), page.getHandle());
     }
 
     private HierarchyManager getHierarchyManager() {
         return MgnlContext.getHierarchyManager(this.workspaceName);
     }
 
     private HierarchyManager getSystemHierarchyManager() {
         return MgnlContext.getSystemContext().getHierarchyManager(this.workspaceName);
     }
 
     /**
      * @param node
      * @param type (activate / deactivate)
      */
     protected void updateMetaData(Content node, String type) throws AccessDeniedException {
         // update the passed node
         MetaData md = node.getMetaData();
         if (type.equals(ACTIVATE)) {
             md.setActivated();
         }
         else {
             md.setUnActivated();
         }
         md.setActivatorId(this.user.getName());
         md.setLastActivationActionDate();
 
         if (type.equals(ACTIVATE)) {
             if (md.getModificationDate() != null && md.getModificationDate().after(contentVersionDate)) {
                 try {
                     Thread.sleep(1);
                 } catch (InterruptedException e) {
                     e.printStackTrace();
                 }
                 md.setModificationDate();
             }
         }
 
         Iterator<Content> children;
         if (type.equals(ACTIVATE)) {
             // use syndicator rule based filter
             children = node.getChildren(new RuleBasedContentFilter(contentFilterRule)).iterator();
         }
         else {
             // all children
             children = node.getChildren(ContentUtil.EXCLUDE_META_DATA_CONTENT_FILTER).iterator();
         }
 
         while (children.hasNext()) {
             Content child = children.next();
             this.updateMetaData(child, type);
         }
 
     }
 
     /**
      * Gets target path to which the current path is mapped in given subscription. Provided path should be without trailing slash.
      */
     protected String getMappedPath(String path, Subscription subscription) {
         String toURI = subscription.getToURI();
         if (null != toURI) {
             String fromURI = subscription.getFromURI();
             // remove trailing slash if any
             fromURI = StringUtils.removeEnd(fromURI, "/");
             toURI = StringUtils.removeEnd(toURI, "/");
             // apply path transformation if any
             path = path.replaceFirst(fromURI, toURI);
             if (path.equals("")) {
                 path = "/";
             }
         }
         return path;
     }
 
     protected URLConnection prepareConnection(Subscriber subscriber, String urlString) throws ExchangeException {
 
         // String handle = getActivationURL(subscriber);
 
         try {
             URL url = new URL(urlString);
             URLConnection urlConnection = url.openConnection();
             urlConnection.setConnectTimeout(subscriber.getConnectTimeout());
             urlConnection.setReadTimeout(subscriber.getReadTimeout());
 
             return urlConnection;
         } catch (MalformedURLException e) {
             throw new ExchangeException("Incorrect URL for subscriber " + subscriber + "[" + SecurityUtil.stripPasswordFromUrl(urlString) + "]");
         } catch (IOException e) {
             throw new ExchangeException("Not able to send the activation request [" + SecurityUtil.stripPasswordFromUrl(urlString) + "]: " + e.getMessage());
         } catch (Exception e) {
             throw new ExchangeException(e);
         }
     }
 
     @Inject
     public void setResouceCollector(ResourceCollector resourceCollector) {
         this.resourceCollector = resourceCollector;
     }
 }