Example usage for com.amazonaws.services.s3.transfer.internal DownloadImpl getState

Introduction

In this page you can find the example usage for com.amazonaws.services.s3.transfer.internal DownloadImpl getState.

Prototype

public synchronized TransferState getState() 

Source Link

Document

Returns the current state of this transfer.

Usage

From source file:com.davidsoergel.s3napback.StreamingTransferManager.java

License:Apache License

private Download download(final GetObjectRequest getObjectRequest, final BufferedOutputStream os,
        final TransferStateChangeListener stateListener) {

    appendUserAgent(getObjectRequest, USER_AGENT);

    String description = "Downloading from " + getObjectRequest.getBucketName() + "/"
            + getObjectRequest.getKey();

    // Add our own transfer progress listener
    TransferProgressImpl transferProgress = new TransferProgressImpl();
    ProgressListenerChain listenerChain = new ProgressListenerChain(
            new TransferProgressUpdatingListener(transferProgress), getObjectRequest.getProgressListener());
    getObjectRequest.setProgressListener(listenerChain);

    final S3Object s3Object = s3.getObject(getObjectRequest);
    final DownloadImpl download = new DownloadImpl(description, transferProgress, listenerChain, s3Object,
            stateListener);/*from   ww w .ja  v a  2  s.c  o m*/

    // null is returned when constraints aren't met
    if (s3Object == null) {
        download.setState(Transfer.TransferState.Canceled);
        download.setMonitor(new DownloadMonitor(download, null));
        return download;
    }

    long contentLength = s3Object.getObjectMetadata().getContentLength();
    if (getObjectRequest.getRange() != null && getObjectRequest.getRange().length == 2) {
        long startingByte = getObjectRequest.getRange()[0];
        long lastByte = getObjectRequest.getRange()[1];
        contentLength = lastByte - startingByte;
    }
    transferProgress.setTotalBytesToTransfer(contentLength);

    Future<?> future = threadPool.submit(new Callable<Object>() {
        //@Override
        public Object call() throws Exception {
            try {
                download.setState(Transfer.TransferState.InProgress);
                StreamingServiceUtils.downloadObjectToStream(s3Object, os);
                download.setState(Transfer.TransferState.Completed);
                return true;
            } catch (Exception e) {
                // Downloads aren't allowed to move from canceled to failed
                if (download.getState() != Transfer.TransferState.Canceled) {
                    download.setState(Transfer.TransferState.Failed);
                }
                throw e;
            }
        }
    });
    download.setMonitor(new DownloadMonitor(download, future));

    return download;
}

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