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(Unicode C) Async Task Chain (another example)Demonstrates using a task chain to run a sequence of FTP tasks asynchronously.
#include <C_CkGlobalW.h> #include <C_CkFtp2W.h> #include <C_CkTaskChainW.h> #include <C_CkTaskW.h> void ChilkatSample(void) { HCkGlobalW chilkatGlob; BOOL success; HCkFtp2W ftp; HCkTaskChainW taskChain; HCkTaskW task; const wchar_t *localFilename; const wchar_t *remoteFilename; int numTasks; int taskIdx; // All Chilkat classes can be unlocked at once at the beginning of a program // by calling UnlockBundle. It requires a Bundle unlock code. chilkatGlob = CkGlobalW_Create(); success = CkGlobalW_UnlockBundle(chilkatGlob,L"Anything for 30-day trial."); if (success != TRUE) { wprintf(L"%s\n",CkGlobalW_lastErrorText(chilkatGlob)); CkGlobalW_Dispose(chilkatGlob); return; } ftp = CkFtp2W_Create(); CkFtp2W_putHostname(ftp,L"ftp.someFtpServer.com"); CkFtp2W_putUsername(ftp,L"****"); CkFtp2W_putPassword(ftp,L"****"); // Connect and login to the FTP server. success = CkFtp2W_Connect(ftp); if (success != TRUE) { wprintf(L"%s\n",CkFtp2W_lastErrorText(ftp)); CkGlobalW_Dispose(chilkatGlob); CkFtp2W_Dispose(ftp); return; } taskChain = CkTaskChainW_Create(); // Create a task to change to the remote directory where the file will be uploaded. task = CkFtp2W_ChangeRemoteDirAsync(ftp,L"junk"); if (CkFtp2W_getLastMethodSuccess(ftp) == FALSE) { wprintf(L"%s\n",CkFtp2W_lastErrorText(ftp)); CkGlobalW_Dispose(chilkatGlob); CkFtp2W_Dispose(ftp); CkTaskChainW_Dispose(taskChain); return; } // Add this task to the task chain. success = CkTaskChainW_Append(taskChain,task); CkTaskW_Dispose(task); // Create a task to upload a file. localFilename = L"c:/temp/hamlet.xml"; remoteFilename = L"hamlet.xml"; task = CkFtp2W_PutFileAsync(ftp,localFilename,remoteFilename); if (CkFtp2W_getLastMethodSuccess(ftp) == FALSE) { wprintf(L"%s\n",CkFtp2W_lastErrorText(ftp)); CkGlobalW_Dispose(chilkatGlob); CkFtp2W_Dispose(ftp); CkTaskChainW_Dispose(taskChain); return; } // Add this task to the task chain. success = CkTaskChainW_Append(taskChain,task); CkTaskW_Dispose(task); // Start the task chain running in a background thread. // Each task is run one after the other (on the same background thread) until all tasks have completed. // The task chain will stop at the first task that fails. CkTaskChainW_putStopOnFailedTask(taskChain,TRUE); success = CkTaskChainW_Run(taskChain); if (!success) { wprintf(L"%s\n",CkTaskChainW_lastErrorText(taskChain)); CkGlobalW_Dispose(chilkatGlob); CkFtp2W_Dispose(ftp); CkTaskChainW_Dispose(taskChain); return; } // The application is now free to do anything else // while the FTP commands are being run... // For this example, we'll simply sleep and periodically // check to see if the taskchain if finished. while (CkTaskChainW_getFinished(taskChain) != TRUE) { // Sleep 100 ms. CkTaskChainW_SleepMs(taskChain,100); } // A finished task chain could be one that was canceled, aborted, or truly finished. // If the task chain "completed", then it ran to completion. A "completed" task will // have a StatusInt equal to 7. If the task finished, but was not completed, then it must've // been aborted or canceled: if (CkTaskChainW_getStatusInt(taskChain) != 7) { wprintf(L"Task did not complete.\n"); wprintf(L"task chain status: %s\n",CkTaskChainW_status(taskChain)); CkGlobalW_Dispose(chilkatGlob); CkFtp2W_Dispose(ftp); CkTaskChainW_Dispose(taskChain); return; } // If we got to this point, the ChangeRemoteDir and PutFile were successful. // We can visually verify by examining the LastErrorText that was recorded for each // of these method calls.. numTasks = CkTaskChainW_getNumTasks(taskChain); taskIdx = 0; while ((taskIdx < numTasks)) { task = CkTaskChainW_GetTask(taskChain,taskIdx); // Examine the status of this task, and the ResultErrorText // (the ResultErrorText is the ftp.LastErrorText captured for FTP method called by the task). // Everything should indicate success. wprintf(L"task status: %s\n",CkTaskW_status(task)); wprintf(L"task log: %s\n",CkTaskW_resultErrorText(task)); CkTaskW_Dispose(task); taskIdx = taskIdx + 1; } success = CkFtp2W_Disconnect(ftp); CkGlobalW_Dispose(chilkatGlob); CkFtp2W_Dispose(ftp); CkTaskChainW_Dispose(taskChain); } |
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