Package org.apache.hadoop.yarn.webapp

Class Controller

java.lang.Object
org.apache.hadoop.yarn.webapp.Controller
All Implemented Interfaces:
Params
Direct Known Subclasses:
HelloWorld.Hello, MyApp.MyController
@LimitedPrivate({"YARN","MapReduce"}) public abstract class Controller extends Object implements Params

  • Field Details

    • LOG

      public static final org.slf4j.Logger LOG

  • Constructor Details

  • Method Details

    • context

      public Controller.RequestContext context()

    • error

      public Throwable error()

    • status

      public int status()

    • setStatus

      public void setStatus(int status)

    • inDevMode

      public boolean inDevMode()

    • injector

      public com.google.inject.Injector injector()

    • getInstance

      public <T> T getInstance(Class<T> cls)

    • request

      public javax.servlet.http.HttpServletRequest request()

    • response

      public javax.servlet.http.HttpServletResponse response()

    • set

      public void set(String key, String value)

    • get

      public String get(String key, String defaultValue)

    • $

      public String $(String key)

    • setTitle

      public void setTitle(String title)

    • setTitle

      public void setTitle(String title, String url)

    • info

      public ResponseInfo info(String about)

    • cookies

      public Map<String,javax.servlet.http.Cookie> cookies()
      Get the cookies
      Returns:
      the cookies map

    • url

      public String url(String... parts)
      Create an url from url components
      Parameters:
      parts - components to join
      Returns:
      an url string

    • index

      public abstract void index()
      The default action.

    • echo

      public void echo()

    • render

      protected void render(Class<? extends View> cls)

    • renderJSON

      protected void renderJSON(Object object)
      Convenience method for REST APIs (without explicit views)
      Parameters:
      object - - the object as the response (in JSON)

    • renderJSON

      protected void renderJSON(Class<? extends ToJSON> cls)

    • renderText

      protected void renderText(String s)
      Convenience method for hello world :)
      Parameters:
      s - - the content to render as plain text

    • writer

      protected PrintWriter writer()