Google App engine Image transforming Issue from local tomcat server

Hi Team,

I am trying to transform images using BlobstoreServiceFactory.

The code is running perfectly on Google cloud app engine. But when I am running the code from local tomcat sever it's throwing the below.

I have set the service account json file in system environment variable. I can read the bucket content from eclipse but while transforming getting the below exception. Please help..

for (StorageObject object : bucketContents) {

// Error coming from this line:

BlobKey blobKey = blobstoreService.createGsBlobKey("/gs/" + bucket + "/" + object.getName());

Image blobImage = ImagesServiceFactory.makeImageFromBlob(blobKey);
Transform resize1 = ImagesServiceFactory.makeResize(width, height);
Image resizeImage1 = imagesService.applyTransform(resize1, blobImage);

}

//Exception Details:

com.google.apphosting.api.ApiProxy$CallNotFoundException: Can't make API call blobstore.CreateEncodedGoogleStorageKey in a thread that is neither the original request thread nor a thread created by ThreadManager.

These apis are meant to be called from App Engine or from the development environment. For Image transformation on your own Tomcat server, you might wish to use a java image transform library.

I am deploying my application on tomcat but getting the image object from google cloud storage bucket.

In that case which library I need to use in my application (in eclipse) java image transform library or Google Cloud App engine library ?

Since you are running your app on your machine you will want to use something like: https://stackoverflow.com/questions/5895829/resizing-image-in-java

Thanks lesv.. but before that I have to get the image from cloud bucket and for that I am using this method which is not giving the actual image.

public static List<StorageObject> listBucket(String bucketName) throws IOException, GeneralSecurityException {
		Storage client = StorageFactory.getService();
		System.out.print(bucketName);
		Storage.Objects.List listRequest = client.objects().list(bucketName);
		System.out.print("******* " + listRequest+ "**********");
		List<StorageObject> results = new ArrayList<StorageObject>();
		Objects objects;

		// Iterate through each page of results, and add them to our results
		// list.
		do {
			objects = listRequest.execute();
			// Add the items in this page of results to the list we'll return.
			results.addAll(objects.getItems());

			// Get the next page, in the next iteration of this loop.
			listRequest.setPageToken(objects.getNextPageToken());
		} while (null != objects.getNextPageToken());

		return results;
	}

Can please let me know how to get the actual image from cloud bucket if I am not using app engine library.

You might wish to use some older apis [docs] [example]

Lesv do we have any tutorial in java for object change notification. I am running my application on cloud app engine and need to add this feature as well. Please share some tutorial link so that I can check and implement.

Take a look at Object-Change-Notifications -- There is a python example. (of course, now there are pub/sub notifications)

As I remember, the key things about setting up object-change-notification is that you need to have the endpoint setup to respond to the requests before you create the request.

@lesv

@lesv : Do you have any example with source code (in JAVA). so that I can check.

On GAE standard, Flex, or somewhere else? I'll add it to the todo list for next Q.

@lesv

@lesv I am running my code on GAE . Do you have any update for this Enhancement in Java?

With Tomcat, it's probably GAE Flexible, as GAE Standard uses Jetty as it's servlet container. It's reasonable to have a sample, I'm still scheduling the Q, will know more later this week.

@lesv

@lesv any update on this ? do we have any sample..

Notice: this issue has been closed because it has been inactive for 652 days. You may reopen this issue if it has been closed in error.

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Google App engine Image transforming Issue from local tomcat server #702

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Google App engine Image transforming Issue from local tomcat server #702

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lesv commented on Jun 13, 2017

yasikmondal commented on Jun 13, 2017

lesv commented on Jun 13, 2017

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lesv commented on Jun 14, 2017

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