@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());
}
@Override
public PseudoLock newPseudoLock() throws Exception {
return new S3PseudoLock(
s3Client,
arguments.getBucket(),
arguments.getLockArguments().getPrefix(),
arguments.getLockArguments().getTimeoutMs(),
arguments.getLockArguments().getPollingMs(),
arguments.getLockArguments().getSettlingMs());
}
private S3Object getConfigObject() throws Exception {
try {
S3Object object = s3Client.getObject(arguments.getBucket(), arguments.getKey());
if (object.getObjectMetadata().getContentLength() > 0) {
return object;
}
} catch (AmazonS3Exception e) {
if (!isNotFoundError(e)) {
throw e;
}
}
return null;
}
private ObjectMetadata getConfigMetadata() throws Exception {
try {
ObjectMetadata metadata =
s3Client.getObjectMetadata(arguments.getBucket(), arguments.getKey());
if (metadata.getContentLength() > 0) {
return metadata;
}
} catch (AmazonS3Exception e) {
if (!isNotFoundError(e)) {
throw e;
}
}
return null;
}