// We check that settings has been set in elasticsearch.yml integration test file
// as described in README
assertThat("Your settings in elasticsearch.yml are incorrects. Check README file.", bucketName, notNullValue());
AmazonS3 client = internalCluster().getInstance(AwsS3Service.class).client(region, accessKey, secretKey);
try {
ObjectListing prevListing = null;
//From http://docs.amazonwebservices.com/AmazonS3/latest/dev/DeletingMultipleObjectsUsingJava.html
//we can do at most 1K objects per delete
//We don't know the bucket name until first object listing
DeleteObjectsRequest multiObjectDeleteRequest = null;
ArrayList<DeleteObjectsRequest.KeyVersion> keys = new ArrayList<DeleteObjectsRequest.KeyVersion>();
while (true) {
ObjectListing list;
if (prevListing != null) {
list = client.listNextBatchOfObjects(prevListing);
} else {
list = client.listObjects(bucketName, basePath);
multiObjectDeleteRequest = new DeleteObjectsRequest(list.getBucketName());
}
for (S3ObjectSummary summary : list.getObjectSummaries()) {
keys.add(new DeleteObjectsRequest.KeyVersion(summary.getKey()));
//Every 500 objects batch the delete request
if (keys.size() > 500) {
multiObjectDeleteRequest.setKeys(keys);
client.deleteObjects(multiObjectDeleteRequest);
multiObjectDeleteRequest = new DeleteObjectsRequest(list.getBucketName());
keys.clear();
}
}
if (list.isTruncated()) {
prevListing = list;
} else {
break;
}
}