Package org.apache.hadoop.yarn.webapp

Class WebApps

java.lang.Object

org.apache.hadoop.yarn.webapp.WebApps

@LimitedPrivate({"YARN","MapReduce"})
public class WebApps
extends Object

Helpers to create an embedded webapp. Quick start:

   WebApp wa = WebApps.$for(myApp).start();

Starts a webapp with default routes binds to 0.0.0.0 (all network interfaces) on an ephemeral port, which can be obtained with:

   int port = wa.port();

With more options:

   WebApp wa = WebApps.$for(myApp).at(address, port).
                        with(configuration).
                        start(new WebApp() {
     @Override public void setup() {
       route("/foo/action", FooController.class);
       route("/foo/:id", FooController.class, "show");
     }
   });

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	WebApps.Builder<T>

Constructor Summary

Constructors

Constructor	Description
WebApps()

Method Summary

Modifier and Type	Method	Description
static <T> WebApps.Builder<T>	$for(String prefix)
static <T> WebApps.Builder<T>	$for(String prefix, Class<T> api, T app)	Create a new webapp builder.
static <T> WebApps.Builder<T>	$for(String prefix, Class<T> api, T app, String wsPrefix)	Create a new webapp builder.
static <T> WebApps.Builder<T>	$for(String prefix, T app)
static <T> WebApps.Builder<T>	$for(T app)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

WebApps

public WebApps()

Method Details

$for

public static <T> WebApps.Builder<T> $for(String prefix,
 Class<T> api,
 T app,
 String wsPrefix)

Create a new webapp builder.

Type Parameters:

T - application (holding the embedded webapp) type

Parameters:

prefix - of the webapp

api - the api class for the application

app - the application instance

wsPrefix - the prefix for the webservice api for this app

Returns:

a webapp builder

See Also:

• for a complete example

$for

public static <T> WebApps.Builder<T> $for(String prefix,
 Class<T> api,
 T app)

Create a new webapp builder.

Type Parameters:

T - application (holding the embedded webapp) type

Parameters:

prefix - of the webapp

api - the api class for the application

app - the application instance

Returns:

a webapp builder

See Also:

• for a complete example

$for

public static <T> WebApps.Builder<T> $for(String prefix,
 T app)

$for

public static <T> WebApps.Builder<T> $for(T app)

$for

public static <T> WebApps.Builder<T> $for(String prefix)