CODEWITHSUNDEEP
javaeclipsegoogle-app-enginegoogle-cloud-storage
Kosmo零
Kosmo零

Reputation: 4151

How to fix "java.lang.NoClassDefFoundError: com/google/api/client/http/HttpRequestInitializer" runtime error?

I only beginning to learn, how to use java with Goole App Engine Standard. I use Eclipse 4.6.3 for that. I created web project and coded some junk, then I decided to try list files at Google Cloud Storage. Here is my code:

public static ArrayList<String> getFilesInBucket(String bucket_name)
{
/*Line 235*/GcsService gcsService = GcsServiceFactory.createGcsService(RetryParams.getDefaultInstance());

    ListResult result = null;
    try { result = gcsService.list(bucket_name, ListOptions.DEFAULT); }
    catch (IOException e)
    {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    ArrayList<String> files = new ArrayList<String>();

    while (result.hasNext())
    {
        ListItem l = result.next();

        if (!l.isDirectory())
            files.add(l.getName());
    }

    return files;
}

This junk works locally, but after I deploy this it stops. I see errors in Google Console:

java.lang.NoClassDefFoundError: com/google/api/client/http/HttpRequestInitializer
at MyJunk.getFilesInBucket (ADServlet.java:235)

Every jar that is added to lib directory in src is also added into web-inf/lib. enter image description here

I also added this jars here: enter image description here

I even opened problems tab and quick fixed every "Eclipse warning: XXXXXXXXXXX.jar will not be exported or published." junk by this: enter image description here

(This is not my screen).

And yet my code fails at runtime on GAE Standard... What else I can do to solve this?

Upvotes: 2

Views: 2981

Answers (1)

Brian de Alwis
Brian de Alwis

Reputation: 2964

The Google Cloud libraries have a lot of dependencies. Rather than try to chase them down by hand, let your machine do it for you. Two suggestions:

  1. Use the Google Cloud Tools for Eclipse. Use Properties > Configure > Convert to App Engine Standard Project, and then Properties > Java Build Path > Libraries and select Add Library… > Google API Libraries and select Google Cloud Storage.
  2. Convert your project to Maven or Gradle and then add the documented dependencies.

Upvotes: 2

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