[英]Networking in Android/Java - how do I callback to a API class after a call back from the server?
[英]How do I register a ColdFusion callback and call it from a Java class?
我需要注冊一個ColdFusion回調(使用Lucee),該回調將從Java類中執行,如下所示:
(我在下面的評論中列出了我如何調用回調的方法)
package com.bonnydoonmedia.io;
import org.java_websocket.client.WebSocketClient;
import org.java_websocket.drafts.Draft_10;
import org.java_websocket.handshake.ServerHandshake;
import java.net.URI;
/*
* author: Robert Munn
* date: 3/15/15
*
* WSClient.java
*
* Simple extension of WebSocketClient by Too Tall Nate
*
* based on example client at
*
* https://github.com/TooTallNate/Java-WebSocket
*
* License: Mozilla Public License 2.0
*
*/
public class WSClient extends WebSocketClient{
public WSClient( URI serverUri , Draft_10 draft ) {
super( serverUri, draft );
}
public WSClient( URI serverURI ) {
super( serverURI );
}
public void connect(){
super.connect();
}
public void send( String message ){
super.send( message );
}
@Override
public void onOpen( ServerHandshake handshakedata ) {
System.out.println( "opened connection" );
System.out.println( "ready state : " + super.getReadyState() );
/* INVOKE THE CALLBACK HERE LIKE:
callback({
"action": "onOpen",
"data": {}
});
*/
}
@Override
public void onMessage( String message ) {
System.out.println( "received: " + message );
/* INVOKE THE CALLBACK HERE LIKE:
callback({
"action": "onMessage",
"data": {
"message": message
}
});
*/
}
@Override
public void onClose( int code, String reason, boolean remote ) {
// The codecodes are documented in class org.java_websocket.framing.CloseFrame
System.out.println( "Connection closed by " + ( remote ? "remote peer" : "us" ) );
/* INVOKE THE CALLBACK HERE LIKE:
callback({
"action": "onClose",
"data": {
}
});
*/
}
@Override
public void onError( Exception ex ) {
ex.printStackTrace();
// if the error is fatal then onClose will be called additionally
/* INVOKE THE CALLBACK HERE LIKE:
callback({
"action": "onMessage",
"data": {
}
});
*/
}
}
在ColdFusion中創建“對象”看起來像這樣(這已經起作用了):
// create the websocket client
uriObject = createObject( "java", "java.net.URI" ).init("ws://local.websockets");
wsClient = CreateObject("java", "WSClient").init(uriObject);
現在,我需要注冊一個回調,並且我想這樣做是這樣的:
function void wsCallback (data) {
switch(data.action) {
case "onOpen":
break;
case "onClose":
break;
case "onMessage":
break;
case "onError":
break;
}
};
wsClient.setCallback(wsCallback);
問題是,我該怎么做最后一部分(在類中設置回調)?
由於它是一個抽象類,請嘗試使用CFCProxy 。 要使用它,請創建具有所需功能(例如“ onClose”等)的CFC。 然后在您的Java類中,導入coldfusion.cfc.CFCProxy
並創建該組件的實例。 然后調用適當的函數,即
CFCProxy yourInstance = new CFCProxy("c:/path/to/yourComponent.cfc");
yourInstance.invoke( "onClose", args );
CFCProxy類應該已經在核心類路徑中。 如果不確定在哪里可以找到它,請嘗試此技巧以找出包含該類的jar。 只需將createObject("java", "coldfusion.cfc.CFCProxy")
替換為“ testClass”。 我在Lucee 4.5 Express上嘗試過,它說它位於{luccee_root}/lib/ext/lucee.jar
。
注意:看起來Lucee還具有其他(更酷的)選項,可用於從java與CF引擎進行交互 。
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