/* *   This file is part of MobiMon. * *   MobiMon is free software; you can redistribute it and/or modify *   it under the terms of the GNU General Public License as published by *   the Free Software Foundation; either version 2 of the License, or *   (at your option) any later version. * *   MobiMon is distributed in the hope that it will be useful, *   but WITHOUT ANY WARRANTY; without even the implied warranty of *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the *   GNU General Public License for more details. *   You should have received a copy of the GNU General Public License *   along with MobiMon; if not, write to the Free Software *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA *//* * MobiMon.java * * Created on January 28, 2003, 9:39 PM */package mobimon.midlet;import javax.microedition.rms.*;import javax.microedition.midlet.*;import javax.microedition.lcdui.*;import javax.microedition.io.*;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;/** * * @author  jan * @version */public class MobiMon extends MIDlet implements CommandListener, Runnable {    private Command quit  = new Command("Exit", Command.EXIT, 2);    private Command ok = new Command("OK", Command.OK, 1);    private Command cancel = new Command("Cancel", Command.CANCEL, 1);    private Command change = new Command("New URL", Command.SCREEN, 2);    private Command info = new Command("Info", Command.SCREEN, 2);    private Command back = new Command("Back", Command.BACK, 1);    private Command prev = new Command("Prev.", Command.SCREEN, 1);    private Command next = new Command("Next", Command.SCREEN, 1);    private Command addShortcut = new Command    ("Add Shortcut", Command.SCREEN, 2);    private Command shortcuts = new Command("Shortcuts", Command.SCREEN, 2);    private Command delete = new Command("Delete", Command.SCREEN, 2);        private String url = null;        private volatile RecordStore database;    private final String dbName = "MMDB";        private Display display;    private TextBox urlTextBox;    private Form connectForm;    private Form errorInfo;    private Form actionParamForm = null;    private Form progressForm = null;    private Gauge progressGauge;    private Displayable buf = null;    private List shortcutList = null;        private String[] boolStr = { "off", "on" };        private String currentHost = null;    private String currentMBean = null;    private String currentAction = null;    private String currentDomain = null;        private Displayable[] mmScreen = new Displayable[4];    private short state = 0;    private String[] title = { "Nodes", "Domains", "Resources", "Actions" };        private boolean listExpected = true;    private boolean commError = false;    private boolean calledFromShortcut = false;        private int pageIndicator = 0;    private int lastPageRequested = 0;        private String currentRequest;        public MobiMon() {    }        public void startApp() {        if (display == null)            display = Display.getDisplay(this);        if (progressForm == null)            createProgressForm();        Alert welcome = new Alert        ("MobiMon 0.9", "Welcome to Mobile System Monitoring!",        null, AlertType.INFO);        welcome.setTimeout(5000);        url = readURLFromDB();        if (url == null) {            enterURLScreen(welcome);        } else {            connectScreen(welcome);        }    }        public void pauseApp() {    }        public void destroyApp(boolean unconditional) {        try {            if (database != null) close();        } catch (Exception e) {        }        notifyDestroyed();    }        /**     * Respond to commands, including exit     * @param c command to perform     * @param s Screen displayable object     */    public void commandAction(Command c, Displayable d) {        if (c == quit) {            destroyApp(false);        } else if (c == ok) {            handleOk(d);        } else if (c == cancel) {            handleCancel(d);        } else if (c == change) {            enterURLScreen(null);        } else if (c == back) {            handleBack(d);        } else if (c == info) {            handleInfo();        } else if (c == prev) {            handlePrev(d);        } else if (c == next) {            handleNext(d);        } else if (c == addShortcut) {            handleAddShortcut(d);        } else if (c == shortcuts) {            shortcutScreen(d);        } else if (c == delete) {            deleteShortcut(d);        }    }        private String readURLFromDB() {        String dburl = null;        try {            database = RecordStore.openRecordStore(dbName, true);            if (database.getNumRecords() > 0) {                byte[] barr = new byte[database.getRecordSize(1)];                barr = database.getRecord(1);                dburl = new String(barr);            }        } catch (Exception e) {            errorAlert(e);        }        return dburl;    }        private void enterURLScreen(Alert a) {        urlTextBox = new TextBox("URL for MobiMon",        url == null ? "http://" : url, 200, 0);        addCommandsAndDisplay(urlTextBox, a);    }        private void connectScreen(Alert a) {        connectForm = new Form("MobiMon URL");        StringItem si = new StringItem(null, "Select OK to connect to\n"        + url + "\nNew URL to enter a different URL"        + "\nShortcuts to access stored shortcuts");        connectForm.append(si);        addCommandsAndDisplay(connectForm, a);    }        private synchronized void writeURLToDB() {        if ((url == null) || (url.length() < 1)) return;        try {            if (database.getNumRecords() == 0) {                database.addRecord(url.getBytes(), 0,                url.getBytes().length);            } else {                database.setRecord(1, url.getBytes(), 0,                url.getBytes().length);            }        } catch (Exception e) {            errorAlert(e);        }    }        private void errorAlert(Exception e) {        StringBuffer b = new StringBuffer(e.getClass().getName());        b.append(": ").append(e.getMessage());        String s = b.toString();        if (s == null) s = "Exception occured";        errorInfo = new Form("Exception");        StringItem si = new StringItem(null, s);        errorInfo.append(si);        addCommandsAndDisplay(errorInfo, null);    }        /**     * <p>Close the database and remove it from persistant     * storage if it is empty</p>     *     * @throws <code>RecordStoreNotOpenException</code> is thrown when trying     *         to close a <code>RecordStore</code> that is not open     * @throws <code>RecordStoreException</code> is thrown when a general     *         exception occurs in a <code>RecordStore</code> operation     */    private void close() throws RecordStoreNotOpenException,    RecordStoreException {        if (database.getNumRecords() == 0) {            database.closeRecordStore();            database.deleteRecordStore(dbName);        } else {            database.closeRecordStore();        }    }        private String sendRequest(String requestStr) {        commError = false;        StringBuffer b = new StringBuffer();        String response = null;        HttpConnection c = null;        OutputStream os = null;        InputStream is = null;        TextBox t = null;        try {            display.setCurrent(progressForm);            long len = -1;            int ch = 0;            long count = 0;            long limit = Runtime.getRuntime().freeMemory() / 4;            c = (HttpConnection)Connector.open(url);            c.setRequestMethod(HttpConnection.POST);            c.setRequestProperty("Content-Type",            "application/x-www-form-urlencoded");            byte postmsg[] = requestStr.getBytes();            c.setRequestProperty("Content-Length",            String.valueOf(postmsg.length));            if (lastPageRequested != 0)                c.setRequestProperty("Page", String.valueOf(lastPageRequested));            os = c.openOutputStream();            os.write(postmsg);            updateProgressForm("Sending request...", 2);            is = c.openInputStream();                        len = ((HttpConnection)c).getLength();            updateProgressForm("Receiving response...", 4);            if (len != -1) {                for (int i = 0; i < len; i++) {                    if ((ch = is.read()) != -1) {                        b.append(/*(ch <= ' ') ? ' ' :*/ (char) ch);                        if (++count > limit) break;                    }                }            } else {                while (((ch = is.read()) != -1) && (count <= limit)) {                    b.append(/*(ch <= ' ') ? ' ' :*/ (char) ch);                    count++;                }            }            response = b.toString();            pageIndicator = c.getHeaderFieldInt("Page", 0);        } catch (IOException ex) {            commError = true;            if (c != null) {                try {                    response = c.getResponseMessage();                    if (response == null)                        response = "No Response message";                } catch (IOException e) {                    errorAlert(e);                }            } else {                response = "Could not open URL: " + ex.getMessage();            }        } catch (IllegalArgumentException ille) {            commError = true;            response = "Check the com.sun.midp.io.http.proxy setting";        } finally {            if (os != null) {                try {                    os.close();                } catch (Exception ce) {; }            }            if (is != null) {                try {                    is.close();                } catch (Exception ce) {; }            }            if (c != null) {                try {                    c.close();                } catch (Exception ce) {; }            }        }        updateProgressForm("Processing response...", 6);        return response;    }        private void addCommandsAndDisplay(Displayable d, Alert a) {        if (d == urlTextBox) {            d.addCommand(ok);            d.addCommand((state == 0) ? quit : cancel);        } else if (d == connectForm) {            d.addCommand(quit);            d.addCommand(ok);            d.addCommand(change);            d.addCommand(shortcuts);        } else if (d == errorInfo) {            d.addCommand(quit);        } else if (d == mmScreen[state]) {            d.addCommand(back);            if (d instanceof List) {                d.addCommand(ok);                if (state == 3) {                    d.addCommand(info);                    d.addCommand(addShortcut);                }            } else if (d instanceof MMCanvas) {                if (pageIndicator < 0) {                    d.addCommand(prev);                    if (pageIndicator < -2) d.addCommand(next);                } else if (pageIndicator > 0) {                    if (pageIndicator > 2) d.addCommand(prev);                    d.addCommand(next);                } else {                    if (lastPageRequested < 0) {                        d.addCommand(next);                        pageIndicator = lastPageRequested - 1;                    } else if (lastPageRequested > 0) {                        d.addCommand(prev);                        pageIndicator = lastPageRequested + 1;                    }                }            }        } else if ((d == actionParamForm) || (d == shortcutList)) {            d.addCommand(back);            d.addCommand(ok);            if (d == shortcutList) d.addCommand(delete);        }        d.setCommandListener(this);        if (a != null)            display.setCurrent(a, d);        else            display.setCurrent(d);    }        private void handleOk(Displayable d) {        if (d == urlTextBox) {            url = urlTextBox.getString().trim();            writeURLToDB();            connectScreen(null);        } else if (d == connectForm) {            listExpected = true;            handleRequest("nodes=y");        } else if (d == actionParamForm) {            requestParamsAction();        } else if (d == shortcutList) {