opcua monitors disconnection attempts several times?

[1198735966]

opcua monitors disconnection attempts several times?

[1198735966]

private class CustomSubscriptionListener implements UaSubscriptionManager.SubscriptionListener {


    public void onKeepAlive(UaSubscription subscription, DateTime publishTime) {
        UaSubscriptionManager.SubscriptionListener.super.onKeepAlive(subscription, publishTime);
        LogUtil.writelog("opcUa监听：onKeepAlive（连接存活中）", logName);
    }

    public void onStatusChanged(UaSubscription subscription, StatusCode status) {
        UaSubscriptionManager.SubscriptionListener.super.onStatusChanged(subscription, status);
        LogUtil.writelog("opcUa监听：onStatusChanged（连接状态改变）:" + status, logName);
    }

    public void onPublishFailure(UaException exception) {
        UaSubscriptionManager.SubscriptionListener.super.onPublishFailure(exception);
        boolean cancelled = opcLink.getSession().isCancelled();
        LogUtil.writelog("opcUa监听：onPublishFailure（连接断开）", logName);

// //连接断开记录
// OpcUaConfig.opcuaRecord();
}

    public void onNotificationDataLost(UaSubscription subscription) {
        UaSubscriptionManager.SubscriptionListener.super.onNotificationDataLost(subscription);
        LogUtil.writelog("opcUa监听：onNotificationDataLost（数据丢失）:" + subscription, logName);
    }

    /**
     * 重连时 尝试恢复之前的订阅失败时 会调用此方法
     *
     * @param uaSubscription 订阅
     * @param statusCode     状态
     */
    public void onSubscriptionTransferFailed(UaSubscription uaSubscription, StatusCode statusCode) {
        UaSubscriptionManager.SubscriptionListener.super.onSubscriptionTransferFailed(uaSubscription, statusCode);
        //在回调方法中重新订阅
        LogUtil.writelog("opcUa监听：正在重新启动订阅22", logName);
        // 获取OPC UA服务器  --参数true就是是否需要重复连接

// createSubscription(true);
// opcLink.getSubscriptionManager().clearSubscriptions();
// OpcuaClient.opcLink.getSubscriptionManager().removeSubscriptionListener(this);
// 重启
run();
}
}

//issues
opcua suddenly disconnects，Will trigger several onPublishFailure？Will trigger several onSubscriptionTransferFailed？

[kevinherron]

These are expected to fire multiple times (when appropriate):

• onPublishFailure will fire for each pending PublishRequest that failed
• onSubscriptionTransferFailed will fire after you reconnect for each subscription that could not be transferred to the new session

If you're just trying to get notified that a connection was lost or regained then use a SessionActivityListener instead.

[1198735966]

onPublishFailure, which only logs twice when you disconnect, why

[kevinherron]

Probably because there was only two outstanding PublishRequests that failed.

[1198735966]

It hasn't been reconnected since