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Date: Sun, 7 Apr 2013 18:45:16 +0000 (UTC)
From: "Harsh J (JIRA)" <jira@apache.org>
To: yarn-issues@hadoop.apache.org
Message-ID: <JIRA.12641268.1365360267715.124960.1365360316109@arcas>
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Subject: [jira] [Created] (YARN-553) Have GetNewApplicationResponse generate
 a directly usable ApplicationSubmissionContext
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Harsh J created YARN-553:
----------------------------

             Summary: Have GetNewApplicationResponse generate a directly usable ApplicationSubmissionContext
                 Key: YARN-553
                 URL: https://issues.apache.org/jira/browse/YARN-553
             Project: Hadoop YARN
          Issue Type: Sub-task
          Components: client
    Affects Versions: 2.0.3-alpha
            Reporter: Harsh J
            Priority: Minor


Right now, we're doing multiple steps to create a relevant ApplicationSubmissionContext for a pre-received GetNewApplicationResponse.

{code}
    GetNewApplicationResponse newApp = yarnClient.getNewApplication();
    ApplicationId appId = newApp.getApplicationId();

    ApplicationSubmissionContext appContext = Records.newRecord(ApplicationSubmissionContext.class);

    appContext.setApplicationId(appId);
{code}

A simplified way may be to have the GetNewApplicationResponse itself provide a helper method that builds a usable ApplicationSubmissionContext for us. Something like:

{code}
GetNewApplicationResponse newApp = yarnClient.getNewApplication();
ApplicationSubmissionContext appContext = newApp.generateApplicationSubmissionContext();
{code}

[The above method can also take an arg for the container launch spec, or perhaps pre-load defaults like min-resource, etc. in the returned object, aside of just associating the application ID automatically.]

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