I am trying to get a file from a bucket in IBM cloud object storage. For this, first I am trying to read all the available files in a bucket.
private static List<String> listBuckets(AmazonS3 cosClient) {
final List<Bucket> bucketList = cosClient.listBuckets();
List<String> bucketNames = new ArrayList<String>();
for (final Bucket bucket : bucketList) {
bucketNames.add(bucket.getName());
}
return bucketNames;
}
public InputStream getCOSFile(AmazonS3 cosClient, String bucketName, String objectName){
List<String> bucketNames = listBuckets(cosClient);
if (bucketNames.contains(bucketName)){
LOGGER.info(bucketName+" exists");
getBucketContentsV2(cosClient, bucketName, 2);
}
Here, I get the message bucketName exists from within the if block. Also, the bucket does exist in my cloud account. But, getBucketContentsV2 gives me this error message: "The specified bucket does not exist. (Service: Amazon S3; Status Code: 404; Error Code: NoSuchBucket; Request ID: xxxxx)
Here's the method getBucketContentsV2, almost exactly as in the IBM cloud doc tutorials.
public static void getBucketContentsV2(AmazonS3 cosClient, String bucketName, int maxKeys) {
System.out.printf("Retrieving bucket contents (V2) from: %s\n", bucketName);
boolean moreResults = true;
String nextToken = "";
while (moreResults) {
ListObjectsV2Request request = new ListObjectsV2Request()
.withBucketName(bucketName)
.withMaxKeys(maxKeys)
.withContinuationToken(nextToken);
ListObjectsV2Result result = cosClient.listObjectsV2(request);
for(S3ObjectSummary objectSummary : result.getObjectSummaries()) {
System.out.printf("Item: %s (%s bytes)\n", objectSummary.getKey(), objectSummary.getSize());
}
if (result.isTruncated()) {
nextToken = result.getNextContinuationToken();
System.out.println("...More results in next batch!\n");
}
else {
nextToken = "";
moreResults = false;
}
}
System.out.println("...No more results!");
}
I also tried retrieving all files in a bucket with V1 code in the docs, and get the same NoSuchBucket error.
Here's the implementation of that method:
public static void listBuckets(AmazonS3 cosClient, String bucketName) {
System.out.printf("Retrieving bucket contents from: %s\n", bucketName);
ObjectListing objectListing = cosClient.listObjects(new ListObjectsRequest().withBucketName(bucketName));
for (S3ObjectSummary objectSummary : objectListing.getObjectSummaries()) {
System.out.printf("Item: %s (%s bytes)\n", objectSummary.getKey(), objectSummary.getSize());
}
System.out.println();
}
So I have tried this code to replicate the error. I was able to list objects in the bucket. My first guest would be a configuration error.
String bucketName = "<BUCKET_NAME>"; // eg my-unique-bucket-name
String newBucketName = "<NEW_BUCKET_NAME>"; // eg my-other-unique-bucket-name
String apiKey = "<API_KEY>"; // eg "W00YiRnLW4k3fTjMB-oiB-2ySfTrFBIQQWanc--P3byk"
String serviceInstanceId = "<SERVICE_INSTANCE_ID"; // eg "crn:v1:bluemix:public:cloud-object-storage:global:a/3bf0d9003abfb5d29761c3e97696b71c:d6f04d83-6c4f-4a62-a165-696756d63903::"
String endpointUrl = "https://s3.us-south.cloud-object-storage.appdomain.cloud"; // this could be any service endpoint
Probably the endpointUrl
is misconfigured. When you are getting the endpoint follow these steps:
Mine was like this: s3.eu-de.cloud-object-storage.appdomain.cloud
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