Source Code Cross Referenced for AutoMIDletStateController.java in  » 6.0-JDK-Modules » j2me » com » sun » midp » automation » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Modules » j2me » com.sun.midp.automation 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         *
003:         *
004:         * Copyright  1990-2007 Sun Microsystems, Inc. All Rights Reserved.
005:         * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
006:         * 
007:         * This program is free software; you can redistribute it and/or
008:         * modify it under the terms of the GNU General Public License version
009:         * 2 only, as published by the Free Software Foundation.
010:         * 
011:         * This program is distributed in the hope that it will be useful, but
012:         * WITHOUT ANY WARRANTY; without even the implied warranty of
013:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014:         * General Public License version 2 for more details (a copy is
015:         * included at /legal/license.txt).
016:         * 
017:         * You should have received a copy of the GNU General Public License
018:         * version 2 along with this work; if not, write to the Free Software
019:         * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
020:         * 02110-1301 USA
021:         * 
022:         * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
023:         * Clara, CA 95054 or visit www.sun.com if you need additional
024:         * information or have any questions.
025:         */
026:
027:        package com.sun.midp.automation;
028:
029:        import java.util.*;
030:        import com.sun.midp.main.*;
031:        import com.sun.midp.events.*;
032:        import com.sun.midp.configurator.Constants;
033:        import com.sun.cldc.isolate.*;
034:
035:        /**
036:         * Class controlling states of the MIDlets
037:         */
038:        final class AutoMIDletStateController implements 
039:                MIDletProxyListListener {
040:
041:            /** MIDlet proxy list reference. */
042:            private MIDletProxyList midletProxyList;
043:
044:            /** List of AutoMIDletInfo for MIDlet's we are interested in */
045:            private AutoMIDletInfoList midletsInfo;
046:
047:            /** The one and only AutoMIDletStateController instance */
048:            private static AutoMIDletStateController stateController = null;
049:
050:            /**
051:             * Private constructor to prevent direct creation of instances.
052:             */
053:            private AutoMIDletStateController() {
054:                midletProxyList = MIDletProxyList.getMIDletProxyList();
055:                midletProxyList.addListener(this );
056:
057:                midletsInfo = AutoMIDletInfoList.getMIDletInfoList();
058:            }
059:
060:            /**
061:             * Starts MIDlet.
062:             *
063:             * @param midletDescriptor descriptor of MIDlet to start
064:             * @param args MIDlet's arguments
065:             * @throws throws RuntimeException if MIDlet couldn't be started
066:             * @return AutoMIDletImpl instance representing started MIDlet or
067:             *         null if there was a problem starting MIDlet
068:             */
069:            AutoMIDletImpl startMIDlet(
070:                    AutoMIDletDescriptorImpl midletDescriptor, String[] args) {
071:
072:                AutoMIDletImpl midlet = null;
073:
074:                synchronized (midletsInfo) {
075:                    AutoSuiteDescriptorImpl suite;
076:                    suite = (AutoSuiteDescriptorImpl) midletDescriptor
077:                            .getSuiteDescriptor();
078:
079:                    // what is needed to start MIDlet
080:                    int suiteID = suite.getSuiteID();
081:                    String midletClassName = midletDescriptor
082:                            .getMIDletClassName();
083:                    String midletName = midletDescriptor.getMIDletName();
084:
085:                    // MIDlet's arguments: only 3 are supported by now
086:                    String arg1 = null;
087:                    String arg2 = null;
088:                    String arg3 = null;
089:                    if (args != null) {
090:                        if (args.length > 0) {
091:                            arg1 = args[0];
092:                        }
093:
094:                        if (args.length > 1) {
095:                            arg2 = args[1];
096:                        }
097:
098:                        if (args.length > 2) {
099:                            arg3 = args[2];
100:                        }
101:                    }
102:
103:                    // create info for MIDlet to be started
104:                    AutoMIDletInfo info = midletsInfo.addToList(suiteID,
105:                            midletClassName);
106:
107:                    // initiate MIDlet starting
108:                    // IMPL_NOTE: add passing of memory quotas and VM profile name
109:                    Isolate isolate = AmsUtil.startMidletInNewIsolate(suiteID,
110:                            midletClassName, midletName, arg1, arg2, arg3);
111:
112:                    // wait for MIDlet to start
113:                    while (info.midletProxy == null && info.startError == false) {
114:                        try {
115:                            midletsInfo.wait();
116:                        } catch (InterruptedException e) {
117:                            // just ignore
118:                        }
119:                    }
120:
121:                    // By now, either MIDlet is running,
122:                    // either there was a problem starting it
123:                    if (info.startError) {
124:                        midletsInfo.removeFromList(info);
125:
126:                        String errorMsg = "";
127:                        switch (info.startErrorCode) {
128:                        case Constants.MIDLET_ISOLATE_CONSTRUCTOR_FAILED:
129:                            errorMsg = "MIDlet Isolate constructor failed";
130:                            break;
131:
132:                        case Constants.MIDLET_RESOURCE_LIMIT:
133:                            errorMsg = "Not enough resources to start the MIDlet";
134:                            break;
135:
136:                        case Constants.MIDLET_ISOLATE_RESOURCE_LIMIT:
137:                            errorMsg = "Maximum Isolate count is exceeded";
138:                            break;
139:
140:                        case Constants.MIDLET_OUT_OF_MEM_ERROR:
141:                            errorMsg = "Not enough memory to start the MIDlet";
142:                            break;
143:
144:                        case Constants.MIDLET_SUITE_NOT_FOUND:
145:                            errorMsg = "MIDlet suite is not found";
146:                            break;
147:
148:                        case Constants.MIDLET_SUITE_DISABLED:
149:                            errorMsg = "MIDlet suite is disabled";
150:                            break;
151:
152:                        case Constants.MIDLET_CLASS_NOT_FOUND:
153:                            errorMsg = "MIDlet class is not found";
154:                            break;
155:
156:                        case Constants.MIDLET_INSTANTIATION_EXCEPTION:
157:                            errorMsg = "MIDlet instantiation exception";
158:                            break;
159:
160:                        case Constants.MIDLET_ILLEGAL_ACCESS_EXCEPTION:
161:                            errorMsg = "MIDlet illegal access exception";
162:                            break;
163:
164:                        case Constants.MIDLET_CONSTRUCTOR_FAILED:
165:                            errorMsg = "MIDlet constructor failed";
166:                            break;
167:
168:                        default:
169:                            errorMsg = "Error starting MIDlet: "
170:                                    + info.startErrorCode;
171:                            break;
172:
173:                        }
174:
175:                        String details = info.startErrorDetails;
176:                        if (details != null) {
177:                            errorMsg += " (" + details + ")";
178:                        }
179:
180:                        throw new RuntimeException(errorMsg);
181:                    } else {
182:                        midlet = new AutoMIDletImpl(midletDescriptor);
183:                        info.midlet = midlet;
184:                        info.midletIsolate = isolate;
185:                    }
186:                }
187:
188:                return midlet;
189:            }
190:
191:            /**
192:             * Initiates switching MIDlet to specified state.
193:             *
194:             * @param midlet AutoMIDletImpl instance representing MIDlet to switch
195:             * @param state state to switch to
196:             */
197:            void switchTo(AutoMIDletImpl midlet, AutoMIDletLifeCycleState state) {
198:                MIDletProxy midletProxy = midletsInfo.findMIDletProxy(midlet);
199:
200:                if (midletProxy != null) {
201:                    if (state == AutoMIDletLifeCycleState.ACTIVE) {
202:                        midletProxy.activateMidlet();
203:                    } else if (state == AutoMIDletLifeCycleState.PAUSED) {
204:                        midletProxy.pauseMidlet();
205:                    } else if (state == AutoMIDletLifeCycleState.DESTROYED) {
206:                        midletProxy.destroyMidlet();
207:                    }
208:                }
209:            }
210:
211:            /**
212:             * Gets AutoMIDletStateController instance.
213:             *
214:             * @return AutoMIDletStateController instance
215:             */
216:            synchronized static AutoMIDletStateController getMIDletStateController() {
217:                if (stateController == null) {
218:                    stateController = new AutoMIDletStateController();
219:                }
220:
221:                return stateController;
222:            }
223:
224:            /**
225:             * Called when a MIDlet Isolate has exited.
226:             *
227:             * @param midletProxy The proxy of the MIDlet being added
228:             */
229:            void isolateExited(MIDletProxy midletProxy) {
230:                synchronized (midletsInfo) {
231:                    AutoMIDletInfo info = midletsInfo
232:                            .findMIDletInfo(midletProxy);
233:                    if (info != null) {
234:                        AutoMIDletImpl midlet = info.midlet;
235:                        if (midlet != null) {
236:                            midlet
237:                                    .stateChanged(AutoMIDletLifeCycleState.DESTROYED);
238:                        }
239:
240:                        // remove MIDlet info from our list as well
241:                        midletsInfo.removeFromList(info);
242:                    }
243:                }
244:            }
245:
246:            /**
247:             * Start notifier thread that will wait for the MIDlet's isolate to exit.
248:             *
249:             * @param proxy proxy of MIDlet
250:             */
251:            private void startNotificationThread(AutoMIDletInfo info) {
252:                IsolateExitNotifier notifier = new IsolateExitNotifier();
253:
254:                notifier.midletProxy = info.midletProxy;
255:                notifier.midletIsolate = info.midletIsolate;
256:                notifier.parent = this ;
257:
258:                new Thread(notifier).start();
259:            }
260:
261:            /**
262:             * MIDletProxyListListener interface implementation
263:             */
264:
265:            /**
266:             * Called when a MIDlet is added to the list.
267:             *
268:             * @param midletProxy The proxy of the MIDlet being added
269:             */
270:            public void midletAdded(MIDletProxy midletProxy) {
271:                synchronized (midletsInfo) {
272:                    AutoMIDletInfo info = midletsInfo
273:                            .findMIDletInfo(midletProxy);
274:                    if (info != null) {
275:                        info.midletProxy = midletProxy;
276:
277:                        // notify waiter that MIDlet has been created
278:                        midletsInfo.notify();
279:                    }
280:                }
281:            }
282:
283:            /**
284:             * Called when the state of a MIDlet in the list is updated.
285:             *
286:             * @param midletProxy The proxy of the MIDlet that was updated
287:             * @param fieldID code for which field of the proxy was updated
288:             */
289:            public void midletUpdated(MIDletProxy midletProxy, int fieldID) {
290:                AutoMIDletImpl midlet = midletsInfo.findMIDlet(midletProxy);
291:
292:                // notify AutoMIDletImpl about state change
293:                if (midlet != null
294:                        && fieldID == MIDletProxyListListener.MIDLET_STATE) {
295:
296:                    switch (midletProxy.getMidletState()) {
297:                    case MIDletProxy.MIDLET_ACTIVE:
298:                        midlet.stateChanged(AutoMIDletLifeCycleState.ACTIVE);
299:                        break;
300:
301:                    case MIDletProxy.MIDLET_PAUSED:
302:                        midlet.stateChanged(AutoMIDletLifeCycleState.PAUSED);
303:                        break;
304:
305:                    default:
306:                        break;
307:                    }
308:                }
309:            }
310:
311:            /**
312:             * Called when a MIDlet is removed from the list.
313:             *
314:             * @param midletProxy The proxy of the removed MIDlet
315:             */
316:            public void midletRemoved(MIDletProxy midletProxy) {
317:                synchronized (midletsInfo) {
318:                    AutoMIDletInfo info = midletsInfo
319:                            .findMIDletInfo(midletProxy);
320:                    if (info != null) {
321:                        startNotificationThread(info);
322:                    }
323:                }
324:            }
325:
326:            /**
327:             * Called when error occurred while starting a MIDlet object.
328:             *
329:             * @param externalAppID ID assigned by the external application manager
330:             * @param suiteID Suite ID of the MIDlet
331:             * @param className Class name of the MIDlet
332:             * @param errorCode start error code
333:             * @param errorDetails start error details
334:             */
335:            public void midletStartError(int externalAppID, int suiteID,
336:                    String className, int errorCode, String errorDetails) {
337:
338:                synchronized (midletsInfo) {
339:                    AutoMIDletInfo info = midletsInfo.findMIDletInfo(suiteID,
340:                            className);
341:
342:                    if (info != null) {
343:                        // set error flag and notify waiter
344:                        info.startError = true;
345:                        info.startErrorCode = errorCode;
346:                        info.startErrorDetails = errorDetails;
347:                        midletsInfo.notify();
348:                    }
349:                }
350:            }
351:
352:        }
353:
354:        /**
355:         * Waits for an isolate to terminate and then notifies the native app
356:         * manager.
357:         */
358:        final class IsolateExitNotifier implements  Runnable {
359:            /** MIDlet information. */
360:            MIDletProxy midletProxy;
361:
362:            /** Isolate of the MIDlet. */
363:            Isolate midletIsolate;
364:
365:            /** Parent to notify */
366:            AutoMIDletStateController parent;
367:
368:            /** Performs this classes function. */
369:            public void run() {
370:                midletIsolate.waitForExit();
371:                parent.isolateExited(midletProxy);
372:            }
373:        }
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