PHP ZPush::GetPingTracking方法代码示例

 /**
  * Checks if the currently known collections for changes for $lifetime seconds.
  * If the backend provides a ChangesSink the sink will be used.
  * If not every $interval seconds an exporter will be configured for each
  * folder to perform GetChangeCount().
  *
  * @param int       $lifetime       (opt) total lifetime to wait for changes / default 600s
  * @param int       $interval       (opt) time between blocking operations of sink or polling / default 30s
  * @param boolean   $onlyPingable   (opt) only check for folders which have the PingableFlag
  *
  * @access public
  * @return boolean              indicating if changes were found
  * @throws StatusException      with code SyncCollections::ERROR_NO_COLLECTIONS if no collections available
  *                              with code SyncCollections::ERROR_WRONG_HIERARCHY if there were errors getting changes
  */
 public function CheckForChanges($lifetime = 600, $interval = 30, $onlyPingable = false)
 {
     $classes = array();
     foreach ($this->collections as $folderid => $spa) {
         if ($onlyPingable && $spa->GetPingableFlag() !== true) {
             continue;
         }
         if (!isset($classes[$spa->GetContentClass()])) {
             $classes[$spa->GetContentClass()] = 0;
         }
         $classes[$spa->GetContentClass()] += 1;
     }
     if (empty($classes)) {
         $checkClasses = "policies only";
     } else {
         if (array_sum($classes) > 4) {
             $checkClasses = "";
             foreach ($classes as $class => $count) {
                 if ($count == 1) {
                     $checkClasses .= sprintf("%s ", $class);
                 } else {
                     $checkClasses .= sprintf("%s(%d) ", $class, $count);
                 }
             }
         } else {
             $checkClasses = implode(" ", array_keys($classes));
         }
     }
     $pingTracking = ZPush::GetPingTracking();
     $this->changes = array();
     $changesAvailable = false;
     ZPush::GetDeviceManager()->AnnounceProcessAsPush();
     ZPush::GetTopCollector()->AnnounceInformation(sprintf("lifetime %ds", $lifetime), true);
     ZLog::Write(LOGLEVEL_INFO, sprintf("SyncCollections->CheckForChanges(): Waiting for %s changes... (lifetime %d seconds)", empty($classes) ? 'policy' : 'store', $lifetime));
     // use changes sink where available
     $changesSink = false;
     $forceRealExport = 0;
     // do not create changessink if there are no folders
     if (!empty($classes) && ZPush::GetBackend()->HasChangesSink()) {
         $changesSink = true;
         // initialize all possible folders
         foreach ($this->collections as $folderid => $spa) {
             if ($onlyPingable && $spa->GetPingableFlag() !== true) {
                 continue;
             }
             // switch user store if this is a additional folder and initialize sink
             ZPush::GetBackend()->Setup(ZPush::GetAdditionalSyncFolderStore($folderid));
             if (!ZPush::GetBackend()->ChangesSinkInitialize($folderid)) {
                 throw new StatusException(sprintf("Error initializing ChangesSink for folder id '%s'", $folderid), self::ERROR_WRONG_HIERARCHY);
             }
         }
     }
     // wait for changes
     $started = time();
     $endat = time() + $lifetime;
     // always use policy key from the request if it was sent
     $policyKey = $this->GetReferencePolicyKey();
     if (Request::WasPolicyKeySent() && Request::GetPolicyKey() != 0) {
         ZLog::Write(LOGLEVEL_DEBUG, sprintf("refpolkey:'%s', sent polkey:'%s'", $policyKey, Request::GetPolicyKey()));
         $policyKey = Request::GetPolicyKey();
     }
     while (($now = time()) < $endat) {
         // how long are we waiting for changes
         $this->waitingTime = $now - $started;
         $nextInterval = $interval;
         // we should not block longer than the lifetime
         if ($endat - $now < $nextInterval) {
             $nextInterval = $endat - $now;
         }
         // Check if provisioning is necessary
         // if a PolicyKey was sent use it. If not, compare with the ReferencePolicyKey
         if (PROVISIONING === true && $policyKey !== false && ZPush::GetDeviceManager()->ProvisioningRequired($policyKey, true)) {
             // the hierarchysync forces provisioning
             throw new StatusException("SyncCollections->CheckForChanges(): PolicyKey changed. Provisioning required.", self::ERROR_WRONG_HIERARCHY);
         }
         // Check if a hierarchy sync is necessary
         if (ZPush::GetDeviceManager()->IsHierarchySyncRequired()) {
             throw new StatusException("SyncCollections->CheckForChanges(): HierarchySync required.", self::HIERARCHY_CHANGED);
         }
         // Check if there are newer requests
         // If so, this process should be terminated if more than 60 secs to go
         if ($pingTracking->DoForcePingTimeout()) {
             // do not update CPOs because another process has already read them!
             $this->saveData = false;
             // more than 60 secs to go?
//.........这里部分代码省略.........