public BlockTransferManager(string resource, byte blockId, int version, CANClient client)
{
mResource = resource;
mBlockId = blockId;
mBlockVersion = version;
mClient = client;
Uri uri = new Uri(resource);
if (uri.Scheme != "file")
{
mResDownLoader = new ResumableResourceDownload(mResource);
}
// first get the device version
mState = BlockTransferState.AquiringDeviceVersion;
// subscribe to CAN frame events
mClient.RaiseFrameReceivedEvent += FrameReceivedEventHandler;
CNXLog.WarnFormat("Starting BlockTransferManager url {0}, Id {1}, ver {2}", resource, blockId, version);
SendBlockRequest();
// start time for cataloge and status reporting
mBlockQueryTimer = new System.Threading.Timer(OnTimedEvent, null, 0, (2 * 60 * 1000));
}
/// <summary>
/// Transferes the block regardless of device version.
/// </summary>
public void ForceTransfer()
{
if (mState == BlockTransferState.AquiringDeviceVersion || mState == BlockTransferState.None)
{
mState = BlockTransferState.AquiringDeviceVersion;
BlockStateMachine(BlockEvent.AquireFailed);
}
}
public StateChangedEventArgs(BlockTransferState state)
{
State = state;
}
private void BlockStateMachine(BlockEvent blockEvent)
{
BlockTransferState entryState = mState;
switch (entryState)
{
case BlockTransferState.None:
switch (blockEvent)
{
case BlockEvent.Timeout:
mState = BlockTransferState.AquiringDeviceVersion;
SendBlockRequest();
break;
case BlockEvent.AquireFailed:
mState = BlockTransferState.AquiringResource;
BeginFetchingResource();
break;
case BlockEvent.ServerVersion:
case BlockEvent.Frame:
if (Synchronised)
{
mState = BlockTransferState.DeviceSynchronised;
}
else
{
mState = BlockTransferState.AquiringResource;
BeginFetchingResource();
}
break;
case BlockEvent.AquireComplete:
case BlockEvent.SendFailed:
mState = BlockTransferState.SynchronisingBlock;
BeginSendingBlock();
break;
case BlockEvent.SendComplete:
mState = BlockTransferState.AquiringDeviceVersion;
SendBlockRequest();
break;
}
break;
case BlockTransferState.AquiringDeviceVersion:
switch (blockEvent)
{
case BlockEvent.Timeout:
mState = BlockTransferState.AquiringDeviceVersion;
SendBlockRequest();
break;
case BlockEvent.AquireFailed:
mState = BlockTransferState.AquiringResource;
BeginFetchingResource();
break;
case BlockEvent.ServerVersion:
case BlockEvent.Frame:
if (Synchronised)
{
mState = BlockTransferState.DeviceSynchronised;
}
else
{
mState = BlockTransferState.AquiringResource;
BeginFetchingResource();
}
break;
case BlockEvent.AquireComplete:
case BlockEvent.SendFailed:
mState = BlockTransferState.SynchronisingBlock;
BeginSendingBlock();
break;
case BlockEvent.SendComplete:
mState = BlockTransferState.AquiringDeviceVersion;
SendBlockRequest();
break;
}
break;
case BlockTransferState.AquiringResource:
switch (blockEvent)
{
case BlockEvent.Timeout:
case BlockEvent.ServerVersion:
case BlockEvent.Frame:
break;
case BlockEvent.AquireFailed:
mState = BlockTransferState.AquiringResourceFailed;
break;
case BlockEvent.AquireComplete:
case BlockEvent.SendFailed:
mState = BlockTransferState.SynchronisingBlock;
BeginSendingBlock();
break;
case BlockEvent.SendComplete:
mState = BlockTransferState.AquiringDeviceVersion;
SendBlockRequest();
break;
}
break;
case BlockTransferState.AquiringResourceFailed:
switch (blockEvent)
{
case BlockEvent.Timeout:
case BlockEvent.ServerVersion:
mState = BlockTransferState.AquiringResource;
BeginFetchingResource();
break;
case BlockEvent.AquireFailed:
break;
case BlockEvent.Frame:
if (Synchronised)
{
mState = BlockTransferState.DeviceSynchronised;
}
break;
case BlockEvent.AquireComplete:
case BlockEvent.SendFailed:
mState = BlockTransferState.SynchronisingBlock;
BeginSendingBlock();
break;
case BlockEvent.SendComplete:
mState = BlockTransferState.AquiringDeviceVersion;
SendBlockRequest();
break;
}
break;
case BlockTransferState.SynchronisingBlock:
switch (blockEvent)
{
case BlockEvent.Timeout:
break;
case BlockEvent.ServerVersion:
case BlockEvent.AquireFailed:
mState = BlockTransferState.AquiringResource;
BeginFetchingResource();
break;
case BlockEvent.Frame:
if (Synchronised)
{
mState = BlockTransferState.DeviceSynchronised;
}
break;
case BlockEvent.AquireComplete:
case BlockEvent.SendFailed:
mState = BlockTransferState.SynchronisingBlock;
BeginSendingBlock();
break;
case BlockEvent.SendComplete:
mState = BlockTransferState.AquiringDeviceVersion;
SendBlockRequest();
break;
}
break;
case BlockTransferState.DeviceSynchronised:
switch (blockEvent)
{
case BlockEvent.Timeout:
SendBlockRequest();
break;
case BlockEvent.ServerVersion:
case BlockEvent.Frame:
if (!Synchronised)
{
mState = BlockTransferState.AquiringResource;
BeginFetchingResource();
}
break;
case BlockEvent.AquireComplete:
case BlockEvent.SendComplete:
break;
}
break;
default:
mState = BlockTransferState.AquiringDeviceVersion;
break;
}
if (entryState != mState)
{
CNXLog.InfoFormat("Block {0} transfer from {1} to {2}", mBlockId, entryState, mState);
OnRaiseStateChangedEvent(new StateChangedEventArgs(mState));
}
}
