tencent cloud

// Create a TransferManager instance, which is used to call the advanced API later.
TransferManager createTransferManager() {
    // Create a COSClient client, which is the basic instance for accessing the COS service.
    // For the detailed code, see **Simple Operations** > **Creating COSClient instance** in this document.
    COSClient cosClient = createCOSClient();

    // Set the thread pool size. We recommend you set the size of your thread pool to 16 or 32 to maximize network resource utilization, provided your client and COS networks are sufficient (for example, uploading a file to a COS bucket from a CVM instance in the same region).
    // We recommend you use a smaller value to avoid timeout caused by slow network speed if you are transferring data over a public network with poor bandwidth quality.
    ExecutorService threadPool = Executors.newFixedThreadPool(32);

    // Pass a `threadpool`; otherwise, a single-thread pool will be generated in `TransferManager` by default.
    TransferManager transferManager = new TransferManager(cosClient, threadPool);

    // Set the configuration items of the advanced API.
    // Set the threshold and part size for multipart upload to 5 MB and 1 MB respectively.
    TransferManagerConfiguration transferManagerConfiguration = new TransferManagerConfiguration();
    transferManagerConfiguration.setMultipartUploadThreshold(5*1024*1024);
    transferManagerConfiguration.setMinimumUploadPartSize(1*1024*1024);
    transferManager.setConfiguration(transferManagerConfiguration);

    return transferManager;
}

void shutdownTransferManager(TransferManager transferManager) {
    // If the parameter is set to `true`, the COSClient instance in the TransferManager instance will also be shut down at the same time.
    // If the parameter is set to `false`, the COSClient instance in the TransferManager instance will not be shut down.
    transferManager.shutdownNow(true);
}