在应用程序周围发送关闭消

时间:2017-10-13 07:31:52

标签: eclipse-rcp e4 application-shutdown

我有一个Eclipse E4应用程序,它与不同服务器有多个连接。现在,当打开MPart时,该部件将调用服务器来接收他的数据。此外,当MPart关闭时,客户端将关闭发送给服务器,以便客户端知道客户端不需要更新数据。

现在我需要找到一种方法让MParts知道客户端正在关闭。这样他们就不会向服务器发送任何消息。这将加速客户端的关闭。

当用户点击关闭按钮时,如何将关闭命令发送到Mpart?

1 个答案:

答案 0 :(得分:1)

使用事件代理向部件发送消息。

在关机代码中发送一个事件:

    function CSVToArray( strData, strDelimiter ){
        // Check to see if the delimiter is defined. If not,
        // then default to comma.
        strDelimiter = (strDelimiter || ",");

        // Create a regular expression to parse the CSV values.
        var objPattern = new RegExp(
            (
                // Delimiters.
                "(\\" + strDelimiter + "|\\r?\\n|\\r|^)" +

                // Quoted fields.
                "(?:\"([^\"]*(?:\"\"[^\"]*)*)\"|" +

                // Standard fields.
                "([^\"\\" + strDelimiter + "\\r\\n]*))"
            ),
            "gi"
            );


        // Create an array to hold our data. Give the array
        // a default empty first row.
        var arrData = [[]];

        // Create an array to hold our individual pattern
        // matching groups.
        var arrMatches = null;


        // Keep looping over the regular expression matches
        // until we can no longer find a match.
        while (arrMatches = objPattern.exec( strData )){

            // Get the delimiter that was found.
            var strMatchedDelimiter = arrMatches[ 1 ];

            // Check to see if the given delimiter has a length
            // (is not the start of string) and if it matches
            // field delimiter. If id does not, then we know
            // that this delimiter is a row delimiter.
            if (
                strMatchedDelimiter.length &&
                strMatchedDelimiter !== strDelimiter
                ){

                // Since we have reached a new row of data,
                // add an empty row to our data array.
                arrData.push( [] );

            }

            var strMatchedValue;

            // Now that we have our delimiter out of the way,
            // let's check to see which kind of value we
            // captured (quoted or unquoted).
            if (arrMatches[ 2 ]){

                // We found a quoted value. When we capture
                // this value, unescape any double quotes.
                strMatchedValue = arrMatches[ 2 ].replace(
                    new RegExp( "\"\"", "g" ),
                    "\""
                    );

            } else {

                // We found a non-quoted value.
                strMatchedValue = arrMatches[ 3 ];

            }


            // Now that we have our value string, let's add
            // it to the data array.
            arrData[ arrData.length - 1 ].push( strMatchedValue );
        }

        // Return the parsed data.
        return( arrData );
    }

@Inject IEventBroker eventBroker; eventBroker.send("my/topic/shutdown", data); 是您要与shudown事件关联的任何数据。

data只是该活动的唯一ID。

使用"my/topic/shutdown"方法同步发送事件,使用send异步发送。

每个部分都可以通过以下方式订阅活动:

post

@Inject @Optional public void shutdown(@EventTopic("my/topic/shutdown") Event event) { .... } Event

如果您希望保证在UI线程中运行该方法,也可以使用org.osgi.service.event.Event

要处理对应用程序“关闭”按钮的单击,您需要将@UIEventTopic的实现放入主窗口的Eclipse上下文中。您可以在生命周期类中执行此操作(如果有的话)。应用程序启动完成事件适用于此:

org.eclipse.e4.ui.workbench.modeling.IWindowCloseHandler