Synchronization Management

You can manage a synchronization schedule for applications by using a UI application to request for sync jobs through the Sync Manager, and a service application to listen for the requests through the Sync Adapter. The service and UI applications must have the same package name.

The main features of the Tizen.Account.SyncManager namespace are:

Sync Adapter
- Setting Sync Adapter callbacks
  
  You can set the callback methods in your Sync Adapter service application that your client application can call to set up a sync operation.
Sync Manager
- Defining a sync job
  
  You can create a new sync job and add user data into it as either an account information instance or a data bundle.
- Requesting an on-demand sync job
  
  You can add an on-demand sync job for a one-time operation.
- Requesting a periodic sync job
  
  You can add a periodic sync job with a recurring cycle.
- Requesting a data change sync job
  
  You can add a data change sync job for receiving a notification whenever a specific database changes.
- Retrieving all registered sync jobs
  
  You can get a list of all registered sync jobs.
- Removing sync jobs
  
  You can remove registered sync jobs when they are no longer needed.

Prerequisites

To enable your application to use the synchronization management functionality:

To use the Tizen.Account.SyncManager namespace, the application has to request permission by adding the following privileges to the tizen-manifest.xml file:

<privileges>
   <privilege>http://tizen.org/privilege/account.read</privilege>
   <privilege>http://tizen.org/privilege/account.write</privilege>
   <privilege>http://tizen.org/privilege/alarm.set</privilege>
   <privilege>http://tizen.org/privilege/calendar.read</privilege>
   <privilege>http://tizen.org/privilege/contact.read</privilege>
</privileges>

To use the methods and properties of the Tizen.Account.SyncManager namespace, include it in your application:
```
using Tizen.Account.SyncManager;
```

Note
To use the features of the Tizen.Account.SyncManager namespace, the service application must first set the callbacks. A UI application cannot initialize or set callback methods through the Tizen.Account.SyncManager.SyncAdapter class. Instead, the UI application must call the methods of the Tizen.Account.SyncManager.SyncClient class to request sync operations from the service application.

Setting Sync Adapter Callbacks

To set callbacks in your Sync Adapter service application that your UI application can call to request sync operations:

Set up event handlers for starting and stopping data synchronization. When the StartSyncCallback() callback of the Tizen.Account.SyncManager.SyncAdapter class is invoked, the predefined data sync process is performed inside the callback method. The CancelSyncCallback() callback works in a similar way and cancels the data sync process.
```
static bool StartSyncCallback(SyncJobData data)
{
    /// Code for starting data synchronization

    return true;
}

static void CancelSyncCallback(SyncJobData data)
{
    /// Code for cancelling data synchronization
}
```
Register the event callbacks with the SetSyncEventCallbacks() method of the Tizen.Account.SyncManager.SyncAdapter class to receive notifications regarding the sync operation.

When a specific event is detected or a sync job is requested, the StartSyncCallback() or CancelSyncCallback() callbacks are invoked.
```
SyncAdapter obj = new SyncAdapter();
obj.SetSyncEventCallbacks(StartSyncCallback, CancelSyncCallback);
```
When the sync operations are no longer needed, unset the callbacks to free the Tizen.Account.SyncManager.SyncAdapter instance:
```
obj.UnsetSyncEventCallbacks();
```

Defining a Sync Job

To define a sync job, create a new Tizen.Account.SyncManager.SyncJobData instance:

SyncJobData request = new SyncJobData();
request.SyncJobName = "PeriodicSyncJob";

You can add user data to a sync job as an account information instance or as a data bundle:

To add account information to a sync job, create a new instance of the Tizen.Account.AccountManager.Account class, add your account information into it, and then add it into the sync job as the Account property of the Tizen.Account.SyncManager.SyncJobData instance. For more information about creating accounts, see Creating and Managing an Account.
```
using Tizen.Account.AccountManager;

AccountManager.Account account = AccountManager.Account.CreateAccount();
account.UserName = "Kim";
account.SyncState = AccountSyncState.Idle;
AccountService.AddAccount(account);

SyncJobData request = new SyncJobData();
request.Account = account;
```
To add a data bundle to a sync job, create a new instance of the Tizen.Applications.Bundle class, add your data into it, and add it as the UserData property of the Tizen.Account.SyncManager.SyncJobData instance.
```
using Tizen.Applications;

Applications.Bundle bundle = new Applications.Bundle();
bundle.AddItem("key", "value");

SyncJobData request = new SyncJobData();
request.UserData = bundle;
```

Requesting an On-demand Sync Job

To request a one-time sync job from the Sync Adapter service application, use the RequestOnDemandSyncJob() method of the Tizen.Account.SyncManager.SyncClient class:

SyncJobData request = new SyncJobData();
request.SyncJobName = "OnDemandSyncJob";
int id = SyncClient.RequestOnDemandSyncJob(request, SyncOption.NoRetry);

Requesting a Periodic Sync Job

To register a periodically-recurring sync operation with the Sync Adapter service application:

To set up a periodic sync job with a regular sync interval, use the AddPeriodicSyncJob() method of the Tizen.Account.SyncManager.SyncClient class, and give the sync interval as a value of the Tizen.Account.SyncManager.SyncPeriod enumeration. In the following example, the sync interval is set to 30 minutes:
```
SyncJobData request = new SyncJobData();
request.SyncJobName = "PeriodicSyncJob";
int id = SyncClient.AddPeriodicSyncJob(request, SyncPeriod.ThirtyMin, SyncOption.None);
```
You can also add additional parameters to the sync job using values of the Tizen.Account.SyncManager.SyncOption enumeration. The value NoRetry means that the application does not retry the sync job if it fails, and Expedited means that the sync job is handled as soon as possible.
```
id = SyncClient.AddPeriodicSyncJob(request, SyncPeriod.OneHour, SyncOption.NoRetry);
id = SyncClient.AddPeriodicSyncJob(request, SyncPeriod.OneDay, SyncOption.Expedited);
```

You can renew a previously registered periodic sync job with the AddPeriodicSyncJob() method by using the same Tizen.Account.SyncManager.SyncJobData instance with new parameters:

SyncJobData request = new SyncJobData();
request.SyncJobName = "PeriodicSyncJob";
int id = SyncClient.AddPeriodicSyncJob(request, SyncPeriod.ThirtyMin, SyncOption.None);
id = SyncClient.AddPeriodicSyncJob(request, SyncPeriod.TwoHours, SyncOption.Expedited);

Defining a Data Change Sync Job

To register a data change sync job with the Sync Adapter service application, to occur whenever corresponding data changes:

Add a data change sync job with the AddDataChangeSyncJob() method of the Tizen.Account.SyncManager.SyncClient class. This method adds the sync job only for the capability given as the value of the SyncJobName property of the Tizen.Account.SyncManager.SyncJobData instance. For example, to add a data change sync job for the calendar:
```
SyncJobData request = new SyncJobData();
request.SyncJobName = SyncJobData.CalendarCapability;
int id = SyncClient.AddDataChangeSyncJob(request, SyncOption.None);
```
You can also add additional parameters to the sync job using values of the Tizen.Account.SyncManager.SyncOption enumeration. The value NoRetry means that the application does not retry the sync job if it fails, and Expedited means that another sync job is handled as soon as possible.
```
SyncJobData request2 = new SyncJobData();
request2.SyncJobName = SyncJobData.ContactCapability;
SyncJobData request3 = new SyncJobData();
request3.SyncJobName = SyncJobData.ImageCapability;
int id2 = SyncClient.AddDataChangeSyncJob(request2, SyncOption.NoRetry);
int id3 = SyncClient.AddDataChangeSyncJob(request3, SyncOption.Expedited);
```

You can renew a previously registered data change sync job with the AddDataChangeSyncJob() method by using the same Tizen.Account.SyncManager.SyncJobData instance with new parameters:

SyncJobData request = new SyncJobData();
request.SyncJobName = SyncJobData.ContactCapability;
int id = SyncClient.AddDataChangeSyncJob(request, SyncOption.Expedited);
id = SyncClient.AddDataChangeSyncJob(request, SyncOption.None);

Retrieving All Registered Sync Jobs

To retrieve a list of all registered sync jobs, use the GetAllSyncJobs() method of the Tizen.Account.SyncManager.SyncClient class:

SyncJobData request = new SyncJobData()
{
    SyncJobName = "PeriodicSyncJob"
};
int periodicId = SyncClient.AddPeriodicSyncJob(request, SyncPeriod.ThreeHours, SyncOption.None);

SyncJobData request2 = new SyncJobData()
{
    SyncJobName = SyncJobData.MusicCapability
};
int dataChangeId = SyncClient.AddDataChangeSyncJob(request2, SyncOption.None);

IEnumerable<KeyValuePair<int, SyncJobData>> syncJobs = SyncClient.GetAllSyncJobs();
foreach (KeyValuePair<int, SyncJobData> item in syncJobs)
{
    if (item.Key == periodicId)
    {
        Console.WriteLine(item.Value.SyncJobName.ToString());
    }
    if (item.Key == datachangeId)
    {
        Console.WriteLine(item.Value.SyncJobName.ToString());
    }
}

Removing Sync Jobs

To remove registered sync jobs, use the RemoveSyncJob() method of the Tizen.Account.SyncManager.SyncClient class, using the id property of the job to be removed:

SyncJobData request = new SyncJobData();
request.SyncJobName = "PeriodicSyncJob";

SyncJobData request2 = new SyncJobData();
request2.SyncJobName = SyncJobData.ImageCapability;

int id = SyncClient.AddPeriodicSyncJob(request, SyncPeriod.OneHour, SyncOption.Expedited);
int id2 = SyncClient.AddDataChangeSyncJob(request2, SyncOption.None);

SyncClient.RemoveSyncJob(id);
SyncClient.RemoveSyncJob(id2);

Dependencies
- Tizen 4.0 and Higher

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