javax.jnlp

## Class ServiceManager

- java.lang.Object
- - javax.jnlp.ServiceManager

-     public final class ServiceManager
      extends java.lang.Object

  The `ServiceManager` provides static methods to lookup JNLP services. This class is final and cannot be instantiated.

  Requests are delegated to a `ServiceManagerStub` object. This object must be set by the JNLP Client on startup using the `setServiceManagerStub` method.

  Since:
    1.4.2
  See Also:
    `ServiceManagerStub`

- - ### Method Summary

    All Methods Static Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `static java.lang.String[]` | `getServiceNames()` Returns the names of all services implemented by the JNLP Client.
    `static java.lang.Object` | `lookup(java.lang.String name)` Asks the JNLP Client for a service with a given name.
    `static void` | `setServiceManagerStub(ServiceManagerStub stub)` Sets the object that all `lookup` and `getServiceNames` requests are delegated to.

    - ### Methods inherited from class java.lang.Object

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

- - ### Method Detail

    - #### lookup

          public static java.lang.Object lookup(java.lang.String name)
                                         throws UnavailableServiceException

      Asks the JNLP Client for a service with a given name. The lookup must be idempotent, that is return the same object for each invocation with the same name.
      Parameters:
        `name` - Name of service to lookup.
      Returns:
        An object implementing the service. `null` will never be returned. Instead an exception will be thrown.
      Throws:
        `UnavailableServiceException` - if the service is not available, or if `name` is null.

    - #### getServiceNames

          public static java.lang.String[] getServiceNames()

      Returns the names of all services implemented by the JNLP Client.

    - #### setServiceManagerStub

          public static void setServiceManagerStub(ServiceManagerStub stub)

      Sets the object that all `lookup` and `getServiceNames` requests are delegated to. The `setServiceManagerStub` call is ignored if the stub has already been set.

      This method should be called exactly once by the JNLP Client, and never be called by a launched application.

      Parameters:
        `stub` - The ServiceManagerStub object to delegate to

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