gov.nist.spectrumbrowser.common.SpectrumBrowserLoggingHandler.java Source code

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Here is the source code for gov.nist.spectrumbrowser.common.SpectrumBrowserLoggingHandler.java

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/*
* Conditions Of Use 
* 
* This software was developed by employees of the National Institute of
* Standards and Technology (NIST), and others. 
* This software has been contributed to the public domain. 
* Pursuant to title 15 Untied States Code Section 105, works of NIST
* employees are not subject to copyright protection in the United States
* and are considered to be in the public domain. 
* As a result, a formal license is not needed to use this software.
* 
* This software is provided "AS IS."  
* NIST MAKES NO WARRANTY OF ANY KIND, EXPRESS, IMPLIED
* OR STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTY OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT
* AND DATA ACCURACY.  NIST does not warrant or make any representations
* regarding the use of the software or the results thereof, including but
* not limited to the correctness, accuracy, reliability or usefulness of
* this software.
*/
package gov.nist.spectrumbrowser.common;

import java.util.logging.Handler;
import java.util.logging.LogRecord;

import com.google.gwt.http.client.Request;
import com.google.gwt.http.client.RequestBuilder;
import com.google.gwt.http.client.RequestCallback;
import com.google.gwt.http.client.Response;
import com.google.gwt.json.client.JSONArray;
import com.google.gwt.json.client.JSONObject;
import com.google.gwt.json.client.JSONString;
import com.google.gwt.json.client.JSONValue;
import com.google.gwt.user.client.Window;

public class SpectrumBrowserLoggingHandler extends Handler {

    String loggingServiceUrl;

    public void log(String message, String url) {
        try {
            //String url = baseUrl + "log";
            if (AbstractSpectrumBrowser.getSessionToken() == null) {
                return;
            }
            String loggingUrl = url + "/" + AbstractSpectrumBrowser.getSessionToken();
            RequestBuilder requestBuilder = new RequestBuilder(RequestBuilder.POST, loggingUrl);
            requestBuilder.setRequestData(message);
            requestBuilder.setCallback(new RequestCallback() {

                @Override
                public void onResponseReceived(Request request, Response response) {
                    // Ignore.
                }

                @Override
                public void onError(Request request, Throwable exception) {
                    // TODO Auto-generated method stub

                }
            });
            requestBuilder.send();
        } catch (Throwable ex) {
            Window.alert("ERROR logging to server : " + ex.getMessage());
        }

    }

    public SpectrumBrowserLoggingHandler(String url) {
        this.loggingServiceUrl = url + "/log";
    }

    @Override
    public void publish(LogRecord record) {
        String message = record.getMessage();
        JSONObject jsonObject = new JSONObject();
        JSONValue jsonValue = new JSONString(message);
        jsonObject.put("message", jsonValue);

        JSONArray jsonArray = new JSONArray();
        Throwable thrown = record.getThrown();
        int j = 0;
        String traceback = "";
        while (thrown != null) {
            thrown.fillInStackTrace();

            JSONObject exceptionObject = new JSONObject();
            exceptionObject.put("ExceptionMessage", new JSONString(thrown.getMessage()));
            StackTraceElement[] stackTrace = thrown.getStackTrace();
            String messageToLog = "";
            for (int i = 0; i < stackTrace.length; i++) {
                String ste = stackTrace[i].getMethodName() + ":" + stackTrace[i].getLineNumber();
                messageToLog += ste;
                messageToLog += "\n";
                traceback += stackTrace[i] + "\n";
            }
            exceptionObject.put("StackTrace", new JSONString(messageToLog));
            jsonArray.set(j, exceptionObject);
            j++;
            thrown = thrown.getCause();
        }

        jsonObject.put("ExceptionInfo", jsonArray);
        if (!traceback.equals("")) {
            jsonObject.put("Traceback", new JSONString(traceback));
        }

        this.log(jsonObject.toString(), loggingServiceUrl);
    }

    @Override
    public void flush() {

    }

    @Override
    public void close() {

    }

}