org.lsst.ccs.subsystem.demo.jni

Class DemoCallbackWithUserData

java.lang.Object

org.lsst.ccs.subsystem.demo.jni.DemoCallbackWithUserData

public class DemoCallbackWithUserData
extends Object

Demo of a jni interface to an asynchronous native service, that is able to preserve some user data between the call and the call back. This data will be used to select also the listener that will be called.

Author:

aubourg

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	DemoCallbackWithUserData.CallbackListener Callback listener called after completion of the native API function.
static class	DemoCallbackWithUserData.ReturnData

Constructor Summary

Constructors

Constructor and Description
DemoCallbackWithUserData()

Method Summary

Modifier and Type	Method and Description
void	callNative(long minDelay, long maxDelay, Object userData, DemoCallbackWithUserData.ReturnData returnData, DemoCallbackWithUserData.CallbackListener listener) Native call to the sample API.
DemoCallbackWithUserData.ReturnData	callSync(long minDelay, long maxDelay) Synchronous adapter to the external API
static void	main(String[] args)

Methods inherited from class java.lang.Object

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

Constructor Detail

DemoCallbackWithUserData

public DemoCallbackWithUserData()

Method Detail

callNative

public void callNative(long minDelay,
                       long maxDelay,
                       Object userData,
                       DemoCallbackWithUserData.ReturnData returnData,
                       DemoCallbackWithUserData.CallbackListener listener)

Native call to the sample API.

Parameters:

minDelay - min sleep time in ms

maxDelay - max sleep time in ms

userData - user data transmitted to the listener

returnData - value returned by external API (which happens to be twice the sleep time. Content will be filled at the time listener is called

listener - the java listener that will be called upon completion

callSync

public DemoCallbackWithUserData.ReturnData callSync(long minDelay,
                                                    long maxDelay)

Synchronous adapter to the external API

Parameters:

minDelay - min sleep delay

maxDelay - max sleep delay

Returns:

the data returned by the API, the function will wait until the API signals the operation is complete and will recover and return the result.

main

public static void main(String[] args)