@Override
public LoadedInstanceConfig storeConfig(ConfigCollection config, long compareVersion)
throws Exception {
{
ObjectMetadata metadata = getConfigMetadata();
if (metadata != null) {
Date lastModified = metadata.getLastModified();
if (lastModified.getTime() != compareVersion) {
return null; // apparently there's no atomic way to do this with S3 so this will have to
// do
}
}
}
PropertyBasedInstanceConfig propertyBasedInstanceConfig =
new PropertyBasedInstanceConfig(config);
ByteArrayOutputStream out = new ByteArrayOutputStream();
propertyBasedInstanceConfig
.getProperties()
.store(out, "Auto-generated by Exhibitor " + hostname);
byte[] bytes = out.toByteArray();
ObjectMetadata metadata =
S3Utils.simpleUploadFile(s3Client, bytes, arguments.getBucket(), arguments.getKey());
return new LoadedInstanceConfig(
propertyBasedInstanceConfig, metadata.getLastModified().getTime());
}
private PartETag uploadChunk(
ByteBuffer bytes, InitiateMultipartUploadResult initResponse, int index) throws Exception {
byte[] md5 = S3Utils.md5(bytes);
UploadPartRequest request = new UploadPartRequest();
request.setBucketName(initResponse.getBucketName());
request.setKey(initResponse.getKey());
request.setUploadId(initResponse.getUploadId());
request.setPartNumber(index);
request.setPartSize(bytes.limit());
request.setMd5Digest(S3Utils.toBase64(md5));
request.setInputStream(new ByteBufferInputStream(bytes));
UploadPartResult response = s3Client.uploadPart(request);
PartETag partETag = response.getPartETag();
if (!response.getPartETag().getETag().equals(S3Utils.toHex(md5))) {
throw new Exception("Unable to match MD5 for part " + index);
}
return partETag;
}