Source Code Cross Referenced for CallCenter.java in  » Ajax » dwr » org » getahead » dwrdemo » ticketcenter » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Ajax » dwr » org.getahead.dwrdemo.ticketcenter 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright 2005 Joe Walker
003:         *
004:         * Licensed under the Apache License, Version 2.0 (the "License");
005:         * you may not use this file except in compliance with the License.
006:         * You may obtain a copy of the License at
007:         *
008:         *     http://www.apache.org/licenses/LICENSE-2.0
009:         *
010:         * Unless required by applicable law or agreed to in writing, software
011:         * distributed under the License is distributed on an "AS IS" BASIS,
012:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013:         * See the License for the specific language governing permissions and
014:         * limitations under the License.
015:         */
016:        package org.getahead.dwrdemo.ticketcenter;
017:
018:        import java.util.ArrayList;
019:        import java.util.Collection;
020:        import java.util.Collections;
021:        import java.util.List;
022:        import java.util.Random;
023:        import java.util.concurrent.ScheduledThreadPoolExecutor;
024:        import java.util.concurrent.TimeUnit;
025:
026:        import jsx3.GI;
027:        import jsx3.app.Server;
028:        import jsx3.gui.Form;
029:        import jsx3.gui.LayoutGrid;
030:        import jsx3.gui.Matrix;
031:        import jsx3.gui.Select;
032:        import jsx3.gui.TextBox;
033:        import jsx3.xml.CdfDocument;
034:        import jsx3.xml.Record;
035:
036:        import org.apache.commons.logging.Log;
037:        import org.apache.commons.logging.LogFactory;
038:        import org.directwebremoting.ScriptSession;
039:        import org.directwebremoting.ServerContext;
040:        import org.directwebremoting.ServerContextFactory;
041:        import org.directwebremoting.WebContextFactory;
042:        import org.directwebremoting.proxy.browser.Window;
043:        import org.directwebremoting.util.SharedObjects;
044:        import org.getahead.dwrdemo.util.RandomData;
045:
046:        /**
047:         * @author Joe Walker [joe at getahead dot ltd dot uk]
048:         */
049:        public class CallCenter implements  Runnable {
050:            /**
051:             * Create a new publish thread and start it
052:             */
053:            public CallCenter() {
054:                // Start with some calls waiting
055:                addRandomKnownCall();
056:                addRandomUnknownCall();
057:                addRandomUnknownCall();
058:                addRandomUnknownCall();
059:
060:                ScheduledThreadPoolExecutor executor = SharedObjects
061:                        .getScheduledThreadPoolExecutor();
062:                executor.scheduleAtFixedRate(this , 2, 2, TimeUnit.SECONDS);
063:            }
064:
065:            /**
066:             * Called once every couple of seconds to take some random action
067:             */
068:            public void run() {
069:                try {
070:                    synchronized (calls) {
071:                        switch (random.nextInt(5)) {
072:                        case 0:
073:                        case 1:
074:                            addRandomUnknownCall();
075:                            break;
076:
077:                        case 2:
078:                            addRandomKnownCall();
079:                            break;
080:
081:                        case 3:
082:                            removeRandomCall();
083:                            break;
084:
085:                        default:
086:                            break;
087:                        }
088:
089:                        updateAll();
090:                    }
091:                } catch (Exception ex) {
092:                    log.warn("Random event failure", ex);
093:                }
094:            }
095:
096:            /**
097:             * Called when the page first loads to ensure we have an up-to-date screen
098:             */
099:            public void load() {
100:                ScriptSession session = WebContextFactory.get()
101:                        .getScriptSession();
102:                deselect(session);
103:
104:                update(Collections.singleton(session));
105:            }
106:
107:            /**
108:             * 
109:             */
110:            public void alertSupervisor(Call fromWeb) {
111:                // This is the ScriptSession of the agent that wishes to alert a supervisor
112:                ScriptSession session = WebContextFactory.get()
113:                        .getScriptSession();
114:                Window window = new Window(session);
115:
116:                // We store the ID of the call we are working on in the ScriptSession
117:                Object handlingId = session.getAttribute("handlingId");
118:                if (handlingId == null) {
119:                    window.alert("No call found");
120:                    return;
121:                }
122:
123:                synchronized (calls) {
124:                    // Check to see that the caller has not hung up since the last update
125:                    Call call = findCaller(handlingId);
126:                    if (call == null) {
127:                        window
128:                                .alert("That caller hung up, please select another");
129:                        return;
130:                    }
131:
132:                    // The user isn't handling this call any more
133:                    session.removeAttribute("handlingId");
134:
135:                    // Update the server details from those passed in
136:                    call.setName(fromWeb.getName());
137:                    call.setAddress(fromWeb.getAddress());
138:                    call.setNotes(fromWeb.getNotes());
139:                    call.setHandlerId(null);
140:                    call.setSupervisorAlert(true);
141:
142:                    // Update the screen of the current user
143:                    deselect(session);
144:
145:                    // Update everyone else's screen
146:                    updateAll();
147:                }
148:            }
149:
150:            /**
151:             * 
152:             */
153:            public void completeHandling(Call fromWeb) {
154:                ScriptSession session = WebContextFactory.get()
155:                        .getScriptSession();
156:                Window window = new Window(session);
157:
158:                Object handlingId = session.getAttribute("handlingId");
159:                if (handlingId == null) {
160:                    window.alert("No call found");
161:                    return;
162:                }
163:
164:                synchronized (calls) {
165:                    Call call = findCaller(handlingId);
166:                    if (call == null) {
167:                        window
168:                                .alert("That caller hung up, please select another");
169:                        return;
170:                    }
171:
172:                    session.removeAttribute("handlingId");
173:
174:                    calls.remove(call);
175:                    log.debug("Properly we should book a ticket for "
176:                            + fromWeb.getPhoneNumber());
177:
178:                    deselect(session);
179:                    updateAll();
180:                }
181:            }
182:
183:            /**
184:             * 
185:             */
186:            public void cancelHandling() {
187:                ScriptSession session = WebContextFactory.get()
188:                        .getScriptSession();
189:                Window window = new Window(session);
190:
191:                Object handlingId = session.getAttribute("handlingId");
192:                if (handlingId == null) {
193:                    window.alert("That caller hung up, please select another");
194:                    return;
195:                }
196:
197:                synchronized (calls) {
198:                    Call call = findCaller(handlingId);
199:                    if (call == null) {
200:                        log.debug("Cancel handling of call that hung up");
201:                        return;
202:                    }
203:
204:                    session.removeAttribute("handlingId");
205:                    call.setHandlerId(null);
206:
207:                    deselect(session);
208:                    updateAll();
209:                }
210:            }
211:
212:            /**
213:             * 
214:             */
215:            public void beginHandling(String id) {
216:                ScriptSession session = WebContextFactory.get()
217:                        .getScriptSession();
218:                Window window = new Window(session);
219:
220:                Object handlingId = session.getAttribute("handlingId");
221:                if (handlingId != null) {
222:                    window
223:                            .alert("Please finish handling the current call before selecting another");
224:                    return;
225:                }
226:
227:                synchronized (calls) {
228:                    Call call = findCaller(id);
229:                    if (call == null) {
230:                        log.debug("Caller not found: " + id);
231:                        window
232:                                .alert("That caller hung up, please select another");
233:                    } else {
234:                        if (call.getHandlerId() != null) {
235:                            window
236:                                    .alert("That call is being handled, please select another");
237:                            return;
238:                        }
239:
240:                        session.setAttribute("handlingId", id);
241:                        call.setHandlerId(session.getId());
242:
243:                        select(session, call);
244:                        updateAll();
245:                    }
246:                }
247:            }
248:
249:            /**
250:             * 
251:             */
252:            private Call findCaller(Object attribute) {
253:                try {
254:                    int id = Integer.parseInt(attribute.toString());
255:
256:                    // We could optimize this, but since there are less than 20 people
257:                    // in the queue ...
258:                    for (Call call : calls) {
259:                        if (call.getId() == id) {
260:                            return call;
261:                        }
262:                    }
263:
264:                    return null;
265:                } catch (NumberFormatException ex) {
266:                    log.warn("Illegal number format: " + attribute.toString(),
267:                            ex);
268:                    return null;
269:                }
270:            }
271:
272:            /**
273:             * 
274:             */
275:            protected void removeRandomCall() {
276:                if (calls.size() > 0) {
277:                    Call removed = null;
278:
279:                    synchronized (calls) {
280:                        int toDelete = random.nextInt(calls.size());
281:                        removed = calls.remove(toDelete);
282:
283:                        String sessionId = removed.getHandlerId();
284:                        if (sessionId != null) {
285:                            ScriptSession session = ServerContextFactory.get()
286:                                    .getScriptSessionById(sessionId);
287:
288:                            if (session != null) {
289:                                session.removeAttribute("handlingId");
290:
291:                                Window window = new Window(session);
292:                                window
293:                                        .alert("It appears that this caller has hung up. Please select another.");
294:                                deselect(session);
295:                            }
296:                        }
297:
298:                        updateAll();
299:                    }
300:
301:                    // log.info("Random Event: Caller hangs up: " + removed.getPhoneNumber());
302:                }
303:            }
304:
305:            /**
306:             * 
307:             */
308:            protected void addRandomKnownCall() {
309:                if (calls.size() < 10) {
310:                    Call call = new Call();
311:                    call.setId(getNextId());
312:                    call.setName(RandomData.getFullName());
313:                    String[] addressAndNumber = RandomData
314:                            .getAddressAndNumber();
315:                    call.setAddress(addressAndNumber[0]);
316:                    call.setPhoneNumber(addressAndNumber[1]);
317:
318:                    calls.add(call);
319:
320:                    // log.info("Random Event: New caller: " + call.getName());
321:                }
322:            }
323:
324:            /**
325:             * 
326:             */
327:            protected void addRandomUnknownCall() {
328:                if (calls.size() < 10) {
329:                    String phoneNumber = RandomData.getPhoneNumber(random
330:                            .nextInt(3) != 0);
331:                    Call call = new Call();
332:                    call.setPhoneNumber(phoneNumber);
333:                    call.setId(getNextId());
334:                    calls.add(call);
335:
336:                    // log.info("Random Event: New caller: " + call.getPhoneNumber());
337:                }
338:            }
339:
340:            /**
341:             *
342:             */
343:            protected void updateAll() {
344:                ServerContext serverContext = ServerContextFactory.get();
345:                String contextPath = serverContext.getContextPath();
346:                if (contextPath == null) {
347:                    return;
348:                }
349:
350:                Collection<ScriptSession> sessions = serverContext
351:                        .getScriptSessionsByPage(contextPath
352:                                + "/gi/ticketcenter.html");
353:
354:                update(sessions);
355:            }
356:
357:            /**
358:             * @param sessions
359:             */
360:            protected void update(Collection<ScriptSession> sessions) {
361:                // Populate a CDF document with data about our calls
362:                CdfDocument cdfdoc = new CdfDocument("jsxroot");
363:                for (Call call : calls) {
364:                    cdfdoc.appendRecord(new Record(call));
365:                }
366:
367:                // Put the CDF doc into the client side cache, and repaint the table
368:                Server tc = GI.getServer(sessions, "ticketcenter");
369:                tc.getCache().setDocument("callers", cdfdoc);
370:                tc.getJSXByName("listCallers", Matrix.class).repaint(null);
371:            }
372:
373:            /**
374:             * @param session
375:             * @param call
376:             */
377:            private void select(ScriptSession session, Call call) {
378:                Server ticketcenter = GI.getServer(session, "ticketcenter");
379:
380:                ticketcenter.getJSXByName("textPhone", TextBox.class).setValue(
381:                        call.getPhoneNumber());
382:                ticketcenter.getJSXByName("textName", TextBox.class).setValue(
383:                        call.getName());
384:                ticketcenter.getJSXByName("textNotes", TextBox.class).setValue(
385:                        call.getNotes());
386:                ticketcenter.getJSXByName("selectEvent", Select.class)
387:                        .setValue(null);
388:
389:                setFormEnabled(session, true);
390:            }
391:
392:            /**
393:             * Set the form to show no caller
394:             * @param session The user that we are clearing
395:             */
396:            private void deselect(ScriptSession session) {
397:                Server ticketcenter = GI.getServer(session, "ticketcenter");
398:
399:                ticketcenter.getJSXByName("textPhone", TextBox.class).setValue(
400:                        "");
401:                ticketcenter.getJSXByName("textName", TextBox.class).setValue(
402:                        "");
403:                ticketcenter.getJSXByName("textNotes", TextBox.class).setValue(
404:                        "");
405:                ticketcenter.getJSXByName("selectEvent", Select.class)
406:                        .setValue(null);
407:
408:                setFormEnabled(session, false);
409:            }
410:
411:            /**
412:             * Disable all the elements in the form
413:             * @param enabled True to enable the elements/false ...
414:             */
415:            private void setFormEnabled(ScriptSession session, boolean enabled) {
416:                int state = enabled ? Form.STATEENABLED : Form.STATEDISABLED;
417:
418:                Server ticketcenter = GI.getServer(session, "ticketcenter");
419:                for (String element : ELEMENTS) {
420:                    ticketcenter.getJSXByName(element, TextBox.class)
421:                            .setEnabled(state, true);
422:                }
423:
424:                LayoutGrid layoutForm = ticketcenter.getJSXByName("layoutForm",
425:                        LayoutGrid.class);
426:                layoutForm.setBackgroundColor(enabled ? "#FFF" : "#EEE", true);
427:            }
428:
429:            /**
430:             * The form fields that we enable and disable
431:             */
432:            private static final String[] ELEMENTS = new String[] {
433:                    "textPhone", "textName", "textAddress", "textPayment",
434:                    "textNotes", "selectEvent", "selectPaymentType",
435:                    "buttonBook", "buttonSupervisor", "buttonCancel" };
436:
437:            /**
438:             * Get the next unique ID in a thread safe way
439:             * @return a unique id
440:             */
441:            public static synchronized int getNextId() {
442:                return nextId++;
443:            }
444:
445:            /**
446:             * The next ID, to get around serialization issues
447:             */
448:            private static int nextId = 1;
449:
450:            /**
451:             * The set of people in our database
452:             */
453:            protected List<Call> calls = Collections
454:                    .synchronizedList(new ArrayList<Call>());
455:
456:            /**
457:             * Used to generate random data
458:             */
459:            protected Random random = new Random();
460:
461:            /**
462:             * The log stream
463:             */
464:            protected static final Log log = LogFactory
465:                    .getLog(CallCenter.class);
466:        }
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