com.controlj.addon.weather.util.Logging.java Source code

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Here is the source code for com.controlj.addon.weather.util.Logging.java

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/*
 * Copyright (c) 2011 Automated Logic Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package com.controlj.addon.weather.util;

import com.controlj.green.addonsupport.AddOnInfo;
import org.dom4j.Document;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.XMLWriter;

import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.reflect.Method;

public class Logging {
    public static final PrintWriter LOGGER = createLogger();
    public static boolean is41;

    public static void println(String msg) {
        LOGGER.println(msg);
    }

    public static void println(Throwable throwable) {
        throwable.printStackTrace(LOGGER);
    }

    public static void println(String msg, Throwable throwable) {
        LOGGER.println(msg);
        throwable.printStackTrace(LOGGER);
    }

    public static void logDocument(String sourceType, String reason, Document document) {
        PrintWriter logger = createLogger(sourceType);

        try {
            logger.print(toXMLString(reason, document));
        } catch (IOException e) {
            println("Error writing document to separate " + sourceType + " log (logDocument reason: " + reason
                    + ')', e);
        }
    }

    private static String toXMLString(String reason, Document document) throws IOException {
        StringWriter stringWriter = new StringWriter();
        PrintWriter pw = new PrintWriter(stringWriter);
        pw.println(reason);
        pw.flush();

        XMLWriter writer = new XMLWriter(stringWriter, OutputFormat.createPrettyPrint());
        writer.write(document);
        return stringWriter.toString();
    }

    private static PrintWriter createLogger() {
        try {
            // if we are running on a newer version of the add-on API (1.1 or later) then
            // we can get a logger...
            Method method = AddOnInfo.class.getDeclaredMethod("getDateStampLogger");
            AddOnInfo addOnInfo = AddOnInfo.getAddOnInfo();
            Writer writer = (Writer) method.invoke(addOnInfo);
            is41 = false;
            return new PrintWriter(writer);
        } catch (Throwable e) {
            is41 = true;
            // otherwise, just write to System.out (it's the best we can do)...
            return new PrintWriter(System.out);
        }
    }

    private static PrintWriter createLogger(String name) {
        try {
            // if we are running on a newer version of the add-on API (1.1 or later) then
            // we can get a logger...
            Method method = AddOnInfo.class.getDeclaredMethod("getDateStampLogger", String.class);
            AddOnInfo addOnInfo = AddOnInfo.getAddOnInfo();
            Writer writer = (Writer) method.invoke(addOnInfo, name);
            return new PrintWriter(writer);
        } catch (Throwable e) {
            // otherwise, just write to System.out (it's the best we can do)...
            return new PrintWriter(System.out);
        }
    }
}