adi sembiring

Hello ....

I'm trying to create registration form using Spring MVC and Velocity as view. in the view there are inputs: username email password confirmpassword birthday -> format MM/dd/yyyy

when user submit the form, my controller validate the form input/command. if there some error, it will show back to the view and print the birth day in correct format.

but the date printed as not formated date. I try use $dateTool.format('MM/dd/yyyy', $registration.BirthDay) but the birthday value still not formated.

any help needed.

Thanks

Hi ...

I usually use WorkManager to implement parallel processing in websphere. and my case is:
I implement synchronize payment data from core banking to university, the sync process will occurred every 5 minutes untill completed. During the sync:
* I create Worker for each university, this worker used to sync data from core banking to univeristy
* get WorkManager usng JNDI, and ask the work manager run the UniversityWorker.

Do you have any idea, implementing this case in glassfish ?

Rob Prime wrote:

adi sembiring wrote:I need suggestion how to fix this problem and prevent my application being crash?

Always close resources that aren't needed anymore. Not just SQL connections but (Prepared)Statements, ResultSets, InputStreams, OutputStreams, Readers, Writers, etc. You usually do this in a finally block. You can use nested try-finally blocks if you have more than one resource. For instance:
Connection connection = ... try { PreparedStatement statement = ... try { statement.setInt(1, ...); ResultSet rs = statement.executeQuery(); try { while (rs.next()) { ... } } finally { // no longer needed, close() rs.close(); } } finally { // no longer needed, close() statement.close(); } } finally { // no longer needed, close() connection.close(); }It may look confusing, but this way ensures that all resources will always be closed, even if exceptions occur. The nesting prevents a) having to check against null, and b) because close() can also throw an exception, that failing to close one resource will lead to other resources not being closed.

Honestly I use Hibernate to make data access to the database.
SessionFactory sessionFactory = new AnnotationConfiguration().configure("mwlog-hibernate.cfg.xml").buildSessionFactory();
while the anotationconfiguration build session factory, it will make connection and add the connection pooling. should I close the session factory even though I get exception when the buildSessionFactory can not connect to the database host ?

I develop application run in Websphere work manager. work manager is used to run thread in the webpshere applications erver.

Every 5 minutes my thread try to get some data from MySQL database from the different host from the application server machine.

When the Host of MySql database turned off, The work manager always try to connect to MySQL database and I know my program will always get exception connection failure. this is the exception: com.mysql.jdbc.CommunicationsException:

Communications link failure due to underlying exception

But, over time my program get exception as follows:

java.sql.SQLException: The application requester cannot establish the connection. (Too many open files)

and this exception make my application server crash:

[8/2/10 9:07:21:613 ICT] 00000d54 prefs W Could not lock User prefs. Unix error code 24. [8/2/10 9:07:21:613 ICT] 00000d54 prefs W Couldn't flush user prefs: java.util.prefs.BackingStoreException: Couldn't get file lock.

I need suggestion how to fix this problem and prevent my application being crash?



WorkEnvironment:

Operation System AIX Application Server Webpshere 7.0

Hi ...., I wanna build ApplicationSetting to my application. the application setting can be stored in a file properties or in a database table. the content of applicatino setting is key and value. ex:

ftp.host = blade ftp.username = dummy ftp.pass = pass content.row_pagination = 20 content.title = How to train your dragon.


I have design my code bellow:
AppSettings Reader

interface IApplicationSettingReader { read(); } DatabaseApplicationSettingReader { dao appSettingDao; AppSettings read() { List<AppSettingEntity> listEntity = appSettingsDao.findAll(); Map<String, String> map = new HaspMap<String, String>(); foreach (AppSettingEntity entity : listEntity) { map.put(entity.getConfigName(), entity.getConfigValue()); } return new AppSettings(map); } } DatabaseApplicationSettingReader { dao appSettingDao; AppSettings read() { //read from some properties file return new AppSettings(map); } }

Application Setting Class

AppSettings { private static AppSettings instance; private Map map; Public AppSettings(Map map) { this.map = map; } public static AppSettings getInstance() { if (instance == null) { throw new RuntimeException("Object not configure yet"); } return instance; } public static configure(IApplicationSettingReader reader) { instance = reader.read(); } public String getFtpSetting(String param) { return map.get("ftp." + param); } public String getContentSetting(String param) { return map.get("content." + param); } }

Test

AppSettingsTest { IApplicationSettingReader reader; @Before public void setUp() throws Exception { reader = new DatabaseApplicationSettingReader(); } @Test public void getContentSetting_should_get_content_title() { AppSettings.configure(reader); Instance settings = AppSettings.getInstance(); String title = settings.getContentSetting("title"); assertNotNull(title); Sysout(title); } }

so, my questions are:
1. Give your opinion about my code, is there some thing wrong ?
2. I configure my application setting once, while the application start, I configure the application setting with appropriate reader (DbReader or PropertiesReader), I make it singleton. The problem is, While some user edit the database or file directly to database or file, I can't get the changed. now, I wanna implement like ApplicationSettingChangeListener. so if the data change, i will refresh reconfigure my application setting. do you have suggestion ?

I use http://illegalargumentexception.blogspot.com/2008/08/ant-automated-deployment-to-websphere.html as my reference. and http://illegalargumentexception.googlecode.com/svn/trunk/code/java/WebSphereAntFiles/ as my sample code to deployed.

this is my buil.properies is ?

#build properties mywebappear=D:/data/code/WebSphereAntFiles/scripts/test/mywebappEAR.ear #WAS6 install directory was_home=C:/IBM/WID7_WTE/runtimes/bi_v7 #server name (see cell/node/server; e.g. "server1") was_server=server1 #user + password; for use when security is enabled was_user=admin was_password=admin #stops scripts on problem was_failonerror=true #virtual host was_virtualhost=default_host #Absolute path to EAR file #was_ear=fooEAR.ear #Name of the enterprise application #was_appname=fooEAR

this is my console while I trying to build with ws_ant.bat

[wsDefaultBindings] mywebapp.war [wsDefaultBindings] <virtual-host> --> default_host [wsDefaultBindings] [wsDefaultBindings] ------------------------ [wsDefaultBindings] Saving EAR File to directory [wsDefaultBindings] Saved EAR File to directory Successfully test_wsStartServer: WAS_wsStartServer: depCheck: depCheck: [startServer] ADMU0116I: Tool information is being logged in file [startServer] C:\IBM\WID7_WTE\runtimes\bi_v7\profiles\qwps\logs\server1\startServer.log [startServer] ADMU0128I: Starting tool with the qwps profile [startServer] ADMU3100I: Reading configuration for server: server1 [startServer] ADMU3028I: Conflict detected on port 8880. Likely causes: a) An instance of [startServer] the server server1 is already running b) some other process is [startServer] using port 8880 [startServer] ADMU3027E: An instance of the server may already be running: server1 [startServer] ADMU0111E: Program exiting with error: [startServer] com.ibm.websphere.management.exception.AdminException: ADMU3027E: An [startServer] instance of the server may already be running: server1 [startServer] ADMU1211I: To obtain a full trace of the failure, use the -trace option. [startServer] ADMU0211I: Error details may be seen in the file: [startServer] C:/IBM/WID7_WTE/runtimes/bi_v7/profiles/qwps\logs\server1\startServer.log BUILD FAILED D:\data\code\WebSphereAntFiles\scripts\test\build.xml:68: The following error occurred while executing this line: D:\data\code\WebSphereAntFiles\scripts\was\wsStartServer.xml:49: Java returned: -1

Hi .. I'm trying to create mysql datasource in websphere. I have setup the data source and test the data source from the admin console. I used ConnectJDBCDataStoreHelper as datasource helper.

Now, I'm trying to access the datasource from desktop application using Hibernate. I've set the JNDI URL, ContextFactory and etc. And I have reference was 7 library in my project.

While I try to run, there are some error occurred. com.ibm.websphere.rsadapter.ConnectJDBCDataStoreHelper not found. I think i must include the jar file. but I don't get the file

Ulf Dittmer wrote:Welcome to JavaRanch.

MVC is a GUI concept; if you don't mean web apps, are you asking about Swing GUIs? Swing has the M-V-C separation to some degree built in. For example, if a JTable is a view, then its TableModel and TableComunModel constitute the model, and your event handlers -either attached to the JTable or some other Swing component- would be the controller.

Can you suggest me about book or web tutorial with an example application for creating CRUD application. So I can understand this concept ???

thanks

Is there any MVC framework in Java SEE.

if in Java EE we can use Spring or Struts, how about Java SE ??