com.google.gwt.logging.server.JsonLogRecordServerUtil Maven / Gradle / Ivy
/*
* Copyright 2010 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.google.gwt.logging.server;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.logging.Level;
import java.util.logging.LogRecord;
import java.util.logging.Logger;
/**
* A set of functions to convert standard JSON strings into
* LogRecords. The corresponding functions to create the JSON
* strings are in JsonLogRecordClientUtil.java. This class should only be used
* in server side code since it imports org.json classes.
* TODO(unnurg) once there is a unified JSON GWT library, combine this with
* JsonLogRecordClientUtil.
*/
public class JsonLogRecordServerUtil {
private static Logger logger =
Logger.getLogger(JsonLogRecordServerUtil.class.getName());
public static LogRecord logRecordFromJson(String jsonString)
throws JSONException {
JSONObject lro = new JSONObject(jsonString);
String level = lro.getString("level");
String loggerName = lro.getString("loggerName");
String msg = lro.getString("msg");
long timestamp = Long.parseLong(lro.getString("timestamp"));
Throwable thrown =
throwableFromJson(lro.getString("thrown"));
LogRecord lr = new LogRecord(Level.parse(level), msg);
lr.setLoggerName(loggerName);
lr.setThrown(thrown);
lr.setMillis(timestamp);
return lr;
}
private static StackTraceElement stackTraceElementFromJson(
String jsonString) throws JSONException {
JSONObject ste = new JSONObject(jsonString);
String className = ste.getString("className");
String fileName = ste.getString("fileName");
String methodName = ste.getString("methodName");
int lineNumber = Integer.parseInt(ste.getString("lineNumber"));
return new StackTraceElement(className, methodName, fileName, lineNumber);
}
private static Throwable throwableFromJson(String jsonString)
throws JSONException {
if (jsonString.equals("{}")) {
return null;
}
JSONObject t = new JSONObject(jsonString);
String message = t.getString("message");
Throwable cause =
throwableFromJson(t.getString("cause"));
StackTraceElement[] stackTrace = null;
JSONArray st = t.getJSONArray("stackTrace");
if (st.length() > 0) {
stackTrace = new StackTraceElement[st.length()];
for (int i = 0; i < st.length(); i++) {
stackTrace[i] = stackTraceElementFromJson(st.getString(i));
}
}
Throwable thrown = new Throwable(message, cause);
thrown.setStackTrace(stackTrace);
return thrown;
}
}