Java Code Examples for com.amazonaws.AmazonClientException#isRetryable()

The following examples show how to use com.amazonaws.AmazonClientException#isRetryable() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: RestartingS3InputStream.java    From emodb with Apache License 2.0 5 votes vote down vote up 
/**
 * Re-opens the input stream, starting at the first unread byte.
 */
private void reopenS3InputStream()
        throws IOException {
    // First attempt to close the existing input stream
    try {
        closeS3InputStream();
    } catch (IOException ignore) {
        // Ignore this exception; we're re-opening because there was in issue with the existing stream
        // in the first place.
    }

    InputStream remainingIn = null;
    int attempt = 0;
    while (remainingIn == null) {
        try {
            S3Object s3Object = _s3.getObject(
                    new GetObjectRequest(_bucket, _key)
                            .withRange(_pos, _length - 1));  // Range is inclusive, hence length-1

            remainingIn = s3Object.getObjectContent();
        } catch (AmazonClientException e) {
            // Allow up to 3 retries
            attempt += 1;
            if (!e.isRetryable() || attempt == 4) {
                throw e;
            }
            // Back-off on each retry
            try {
                Thread.sleep(200 * attempt);
            } catch (InterruptedException interrupt) {
                throw Throwables.propagate(interrupt);
            }
        }
    }

    _in = remainingIn;
}