java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory

Question

I am trying to send a notification using this class FCMHelper and im getting errors errors leading me to an error in httpclient this is my code ...

public void send() throws IOException{
    JsonObject notificationObject = new JsonObject();
    notificationObject.addProperty("data", "hello");
    notificationObject.addProperty("to", "dSvX_cWo5iY:A......QQT-bkb8x0VO");
    FireBase firebase = FireBase.getInstance();
    firebase.sendNotification("to", "condition", notificationObject);
}

i got this error

Caused by: java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory
    at org.glassfish.web.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1783)
    at org.glassfish.web.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1633)
    ... 58 more

what the problem here or if someone could give any other way to do it

.. thanks for your help

Answer 1

It seems "org/apache/commons/logging/LogFactory" is missed. Have you imported the library?