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• iOS Support with Windows Azure Mobile Services – now with Push Notifications

  - by ScottGu

  A few weeks ago I posted about a number of improvements to Windows Azure Mobile Services. One of these was the addition of an Objective-C client SDK that allows iOS developers to easily use Mobile Services for data and authentication.  Today I'm excited to announce a number of improvement to our iOS SDK and, most significantly, our new support for Push Notifications via APNS (Apple Push Notification Services).  This makes it incredibly easy to fire push notifications to your iOS users from Windows Azure Mobile Service scripts. Push Notifications via APNS We've provided two complete tutorials that take you step-by-step through the provisioning and setup process to enable your Windows Azure Mobile Service application with APNS (Apple Push Notification Services), including all of the steps required to configure your application for push in the Apple iOS provisioning portal: Getting started with Push Notifications - iOS Push notifications to users by using Mobile Services - iOS Once you've configured your application in the Apple iOS provisioning portal and uploaded the APNS push certificate to the Apple provisioning portal, it's just a matter of uploading your APNS push certificate to Mobile Services using the Windows Azure admin portal: Clicking the “upload” within the “Push” tab of your Mobile Service allows you to browse your local file-system and locate/upload your exported certificate.  As part of this you can also select whether you want to use the sandbox (dev) or production (prod) Apple service: Now, the code to send a push notification to your clients from within a Windows Azure Mobile Service is as easy as the code below: push.apns.send(deviceToken, {      alert: 'Toast: A new Mobile Services task.',      sound: 'default' }); This will cause Windows Azure Mobile Services to connect to APNS (Apple Push Notification Service) and send a notification to the iOS device you specified via the deviceToken: Check out our reference documentation for full details on how to use the new Windows Azure Mobile Services apns object to send your push notifications. Feedback Scripts An important part of working with any PNS (Push Notification Service) is handling feedback for expired device tokens and channels. This typically happens when your application is uninstalled from a particular device and can no longer receive your notifications. With Windows Notification Services you get an instant response from the HTTP server.  Apple’s Notification Services works in a slightly different way and provides an additional endpoint you can connect to poll for a list of expired tokens. As with all of the capabilities we integrate with Mobile Services, our goal is to allow developers to focus more on building their app and less on building infrastructure to support their ideas. Therefore we knew we had to provide a simple way for developers to integrate feedback from APNS on a regular basis.  This week’s update now includes a new screen in the portal that allows you to optionally provide a script to process your APNS feedback – and it will be executed by Mobile Services on an ongoing basis: This script is invoked periodically while your service is active. To poll the feedback endpoint you can simply call the apns object's getFeedback method from within this script: push.apns.getFeedback({       success: function(results) {           // results is an array of objects with a deviceToken and time properties      } }); This returns you a list of invalid tokens that can now be removed from your database. iOS Client SDK improvements Over the last month we've continued to work with a number of iOS advisors to make improvements to our Objective-C SDK. The SDK is being developed under an open source license (Apache 2.0) and is available on github. Many of the improvements are behind the scenes to improve performance and memory usage. However, one of the biggest improvements to our iOS Client API is the addition of an even easier login method.  Below is the Objective-C code you can now write to invoke it: [client loginWithProvider:@"twitter"                     onController:self                        animated:YES                      completion:^(MSUser *user, NSError *error) {      // if no error, you are now logged in via twitter }]; This code will automatically present and dismiss our login view controller as a modal dialog on the specified controller.  This does all the hard work for you and makes login via Twitter, Google, Facebook and Microsoft Account identities just a single line of code. My colleague Josh just posted a short video demonstrating these new features which I'd recommend checking out: Summary The above features are all now live in production and are available to use immediately.  If you don’t already have a Windows Azure account, you can sign-up for a free trial and start using Mobile Services today. Visit the Windows Azure Mobile Developer Center to learn more about how to build apps with Mobile Services. Hope this helps, Scott P.S. In addition to blogging, I am also now using Twitter for quick updates and to share links. Follow me at: twitter.com/scottgu

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• www.domain redirecting to google?

  - by aayush

  Note: A while back i had no place to host my domain, then via namecheap i set it to forward my domain to google I bought webhosting again today and everything was working fine. I set up vhosts and set up www.domain as the server alias. Both worked. Then i tried to set up a alternate subdomain test.domain, but failed (I did it by creating a alternate vhost right below the current one) as it kept redirecting to google. As a test, i replaced the www with test in serveralias, it still redirected to google but now even www redirects to google. I am using cloudflare, and i am really confused how to go about this. I tried listing www as a cname and as a A record, still redirecting to google. I tried checking via proxies e.t.c, its universal and hence not a problem of my PC. Please help, i am really distressed by this. I am running a ubuntu 13.10 x32 stack with LAMP. Here is what my domain.com.conf file looks like <VirtualHost *:80> # The ServerName directive sets the request scheme, hostname and port that # the server uses to identify itself. This is used when creating # redirection URLs. In the context of virtual hosts, the ServerName # specifies what hostname must appear in the request's Host: header to # match this virtual host. For the default virtual host (this file) this # value is not decisive as it is used as a last resort host regardless. # However, you must set it for any further virtual host explicitly. ServerName domain.com ServerAlias www.domain.com ServerAdmin webmaster@localhost DocumentRoot /var/www/domain.com/public_html # Available loglevels: trace8, ..., trace1, debug, info, notice, warn, # error, crit, alert, emerg. # It is also possible to configure the loglevel for particular # modules, e.g. #LogLevel info ssl:warn ErrorLog ${APACHE_LOG_DIR}/error.log CustomLog ${APACHE_LOG_DIR}/access.log combined # For most configuration files from conf-available/, which are # enabled or disabled at a global level, it is possible to # include a line for only one particular virtual host. For example the # following line enables the CGI configuration for this host only # after it has been globally disabled with "a2disconf". #Include conf-available/serve-cgi-bin.conf </VirtualHost> There is a valid index.php file at the end of the documentroot aswell. The website in question is aayushagra.com Edit: On cloudflare i tried removing the www entirely, and it still sent me to google Edit: Zone file ;; Domain: aayushagra.com ;; Exported: 2013-11-03 07:37:52 ;; ;; This file is intended for use for informational and archival ;; purposes ONLY and MUST be edited before use on a production ;; DNS server. In particular, you must: ;; -- update the SOA record with the correct authoritative name server ;; -- update the SOA record with the contact e-mail address information ;; -- update the NS record(s) with the authoritative name servers for this domain. ;; ;; For further information, please consult the BIND documentation ;; located on the following website: ;; ;; http://www.isc.org/ ;; ;; And RFC 1035: ;; ;; http://www.ietf.org/rfc/rfc1035.txt ;; ;; Please note that we do NOT offer technical support for any use ;; of this zone data, the BIND name server, or any other third-party ;; DNS software. ;; ;; Use at your own risk. ;; $ORIGIN aayushagra.com. @ 3600 IN SOA aayushagra.com. root.aayushagra.com. ( 2013110301 ; serial 7200 ; refresh 3600 ; retry 86400 ; expire 3600) ; minimum ;; MX Records aayushagra.com. 300 IN MX aayushagra.com. ;; CNAME Records direct.aayushagra.com. 300 IN CNAME aayushagra.com. ;; A Records (IPv4 addresses) www.aayushagra.com. 300 IN A 146.185.140.31 aayushagra.com. 300 IN A 146.185.140.31

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• Data Source Security Part 1

  - by Steve Felts

  I’ve written a couple of articles on how to store data source security credentials using the Oracle wallet.  I plan to write a few articles on the various types of security available to WebLogic Server (WLS) data sources.  There are more options than you might think! There have been several enhancements in this area in WLS 10.3.6.  There are a couple of more enhancements planned for release WLS 12.1.2 that I will include here for completeness.  This isn’t intended as a teaser.  If you call your Oracle support person, you can get them now as minor patches to WLS 10.3.6.   The current security documentation is scattered in a few places, has a few incorrect statements, and is missing a few topics.  It also seems that the knowledge of how to apply some of these features isn’t written down.  The goal of these articles is to talk about WLS data source security in a unified way and to introduce some approaches to using the available features.  Introduction to WebLogic Data Source Security Options By default, you define a single database user and password for a data source.  You can store it in the data source descriptor or make use of the Oracle wallet.  This is a very simple and efficient approach to security.  All of the connections in the connection pool are owned by this user and there is no special processing when a connection is given out.  That is, it’s a homogeneous connection pool and any request can get any connection from a security perspective (there are other aspects like affinity).  Regardless of the end user of the application, all connections in the pool use the same security credentials to access the DBMS.   No additional information is needed when you get a connection because it’s all available from the data source descriptor (or wallet). java.sql.Connection conn =  mydatasource.getConnection(); Note: You can enter the password as a name-value pair in the Properties field (this not permitted for production environments) or you can enter it in the Password field of the data source descriptor. The value in the Password field overrides any password value defined in the Properties passed to the JDBC Driver when creating physical database connections. It is recommended that you use the Password attribute in place of the password property in the properties string because the Password value is encrypted in the configuration file (stored as the password-encrypted attribute in the jdbc-driver-params tag in the module file) and is hidden in the administration console.  The Properties and Password fields are located on the administration console Data Source creation wizard or Data Source Configuration tab. The JDBC API can also be used to programmatically specify a database user name and password as in the following.  java.sql.Connection conn = mydatasource.getConnection(“user”, “password”); According to the JDBC specification, it’s supposed to take a database user and associated password but different vendors implement this differently.  WLS, by default, treats this as an application server user and password.  The pair is authenticated to see if it’s a valid user and that user is used for WLS security permission checks.  By default, the user is then mapped to a database user and password using the data source credential mapper, so this API sort of follows the specification but database credentials are one-step removed from the application code.  More details and the rationale are described later. While the default approach is simple, it does mean that only one database user is doing all of the work.  You can’t figure out who actually did the update and you can’t restrict SQL operations by who is running the operation, at least at the database level.   Any type of per-user logic will need to be in the application code instead of having the database do it.  There are various WLS data source features that can be configured to provide some per-user information about the operations to the database. WebLogic Data Source Security Options This table describes the features available for WebLogic data sources to configure database security credentials and a brief description.  It also captures information about the compatibility of these features with one another. Feature Description Can be used with Can’t be used with User authentication (default) Default getConnection(user, password) behavior – validate the input and use the user/password in the descriptor. Set client identifier Proxy Session, Identity pooling, Use database credentials Use database credentials Instead of using the credential mapper, use the supplied user and password directly. Set client identifier, Proxy session, Identity pooling User authentication, Multi Data Source Set Client Identifier Set a client identifier property associated with the connection (Oracle and DB2 only). Everything Proxy Session Set a light-weight proxy user associated with the connection (Oracle-only). Set client identifier, Use database credentials Identity pooling, User authentication Identity pooling Heterogeneous pool of connections owned by specified users. Set client identifier, Use database credentials Proxy session, User authentication, Labeling, Multi-datasource, Active GridLink Note that all of these features are available with both XA and non-XA drivers. Currently, the Proxy Session and Use Database Credentials options are on the Oracle tab of the Data Source Configuration tab of the administration console (even though the Use Database Credentials feature is not just for Oracle databases – oops).  The rest of the features are on the Identity tab of the Data Source Configuration tab in the administration console (plan on seeing them all in one place in the future). The subsequent articles will describe these features in more detail.  Keep referring back to this table to see the big picture.

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• Data Source Security Part 2

  - by Steve Felts

  In Part 1, I introduced the default security behavior and listed the various options available to change that behavior.  One of the key topics to understand is the difference between directly using database user and password values versus mapping from WLS user and password to the associated database values.   The direct use of database credentials is relatively new to WLS, based on customer feedback.  Some of the trade-offs are covered in this article. Credential Mapping vs. Database Credentials Each WLS data source has a credential map that is a mechanism used to map a key, in this case a WLS user, to security credentials (user and password).  By default, when a user and password are specified when getting a connection, they are treated as credentials for a WLS user, validated, and are converted to a database user and password using a credential map associated with the data source.  If a matching entry is not found in the credential map for the data source, then the user and password associated with the data source definition are used.  Because of this defaulting mechanism, you should be careful what permissions are granted to the default user.  Alternatively, you can define an invalid default user to ensure that no one can accidentally get through (in this case, you would need to set the initial capacity for the pool to zero so that the pool is populated only by valid users). To create an entry in the credential map: 1) First create a WLS user.  In the administration console, go to Security realms, select your realm (e.g., myrealm), select Users, and select New.  2) Second, create the mapping.  In the administration console, go to Services, select Data sources, select your data source name, select Security, select Credentials, and select New.  See http://docs.oracle.com/cd/E24329_01/apirefs.1211/e24401/taskhelp/jdbc/jdbc_datasources/ConfigureCredentialMappingForADataSource.html for more information. The advantages of using the credential mapping are that: 1) You don’t hard-code the database user/password into a program or need to prompt for it in addition to the WLS user/password and 2) It provides a layer of abstraction between WLS security and database settings such that many WLS identities can be mapped to a smaller set of DB identities, thereby only requiring middle-tier configuration updates when WLS users are added/removed. You can cut down the number of users that have access to a data source to reduce the user maintenance overhead.  For example, suppose that a servlet has the one pre-defined, special WLS user/password for data source access, hard-wired in its code in a getConnection(user, password) call.  Every WebLogic user can reap the specific DBMS access coded into the servlet, but none has to have general access to the data source.  For instance, there may be a ‘Sales’ DBMS which needs to be protected from unauthorized eyes, but it contains some day-to-day data that everyone needs. The Sales data source is configured with restricted access and a servlet is built that hard-wires the specific data source access credentials in its connection request.  It uses that connection to deliver only the generally needed day-to-day information to any caller. The servlet cannot reveal any other data, and no WebLogic user can get any other access to the data source.  This is the approach that many large applications take and is the reasoning behind the default mapping behavior in WLS. The disadvantages of using the credential map are that: 1) It is difficult to manage (create, update, delete) with a large number of users; it is possible to use WLST scripts or a custom JMX client utility to manage credential map entries. 2) You can’t share a credential map between data sources so they must be duplicated. Some applications prefer not to use the credential map.  Instead, the credentials passed to getConnection(user, password) should be treated as database credentials and used to authenticate with the database for the connection, avoiding going through the credential map.  This is enabled by setting the “use-database-credentials” to true.  See http://docs.oracle.com/cd/E24329_01/apirefs.1211/e24401/taskhelp/jdbc/jdbc_datasources/ConfigureOracleParameters.html "Configure Oracle parameters" in Oracle WebLogic Server Administration Console Help. Use Database Credentials is not currently supported for Multi Data Source configurations.  When enabled, it turns off credential mapping on Generic and Active GridLink data sources for the following attributes: 1. identity-based-connection-pooling-enabled (this interaction is available by patch in 10.3.6.0). 2. oracle-proxy-session (this interaction is first available in 10.3.6.0). 3. set client identifier (this interaction is available by patch in 10.3.6.0).  Note that in the data source schema, the set client identifier feature is poorly named “credential-mapping-enabled”.  The documentation and the console refer to it as Set Client Identifier. To review the behavior of credential mapping and using database credentials: - If using the credential map, there needs to be a mapping for each WLS user to database user for those users that will have access to the database; otherwise the default user for the data source will be used.  If you always specify a user/password when getting a connection, you only need credential map entries for those specific users. - If using database credentials without specifying a user/password, the default user and password in the data source descriptor are always used.  If you specify a user/password when getting a connection, that user will be used for the credentials.  WLS users are not involved at all in the data source connection process.

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• IsNumeric() Broken? Only up to a point.

  - by Phil Factor

  In SQL Server, probably the best-known 'broken' function is poor ISNUMERIC() . The documentation says 'ISNUMERIC returns 1 when the input expression evaluates to a valid numeric data type; otherwise it returns 0. ISNUMERIC returns 1 for some characters that are not numbers, such as plus (+), minus (-), and valid currency symbols such as the dollar sign ($).'Although it will take numeric data types (No, I don't understand why either), its main use is supposed to be to test strings to make sure that you can convert them to whatever numeric datatype you are using (int, numeric, bigint, money, smallint, smallmoney, tinyint, float, decimal, or real). It wouldn't actually be of much use anyway, since each datatype has different rules. You actually need a RegEx to do a reasonably safe check. The other snag is that the IsNumeric() function  is a bit broken. SELECT ISNUMERIC(',')This cheerfully returns 1, since it believes that a comma is a currency symbol (not a thousands-separator) and you meant to say 0, in this strange currency.  However, SELECT ISNUMERIC(N'£')isn't recognized as currency.  '+' and  '-' is seen to be numeric, which is stretching it a bit. You'll see that what it allows isn't really broken except that it doesn't recognize Unicode currency symbols: It just tells you that one numeric type is likely to accept the string if you do an explicit conversion to it using the string. Both these work fine, so poor IsNumeric has to follow suit. SELECT  CAST('0E0' AS FLOAT)SELECT  CAST (',' AS MONEY) but it is harder to predict which data type will accept a '+' sign. SELECT  CAST ('+' AS money) --0.00SELECT  CAST ('+' AS INT)   --0SELECT  CAST ('+' AS numeric)/* Msg 8115, Level 16, State 6, Line 4 Arithmetic overflow error converting varchar to data type numeric.*/SELECT  CAST ('+' AS FLOAT)/*Msg 8114, Level 16, State 5, Line 5Error converting data type varchar to float.*/> So we can begin to say that the maybe IsNumeric isn't really broken, but is answering a silly question 'Is there some numeric datatype to which i can convert this string? Almost, but not quite. The bug is that it doesn't understand Unicode currency characters such as the euro or franc which are actually valid when used in the CAST function. (perhaps they're delaying fixing the euro bug just in case it isn't necessary).SELECT ISNUMERIC (N'?23.67') --0SELECT  CAST (N'?23.67' AS money) --23.67SELECT ISNUMERIC (N'£100.20') --1SELECT  CAST (N'£100.20' AS money) --100.20 Also the CAST function itself is quirky in that it cannot convert perfectly reasonable string-representations of integers into integersSELECT ISNUMERIC('200,000')       --1SELECT  CAST ('200,000' AS INT)   --0/*Msg 245, Level 16, State 1, Line 2Conversion failed when converting the varchar value '200,000' to data type int.*/  A more sensible question is 'Is this an integer or decimal number'. This cuts out a lot of the apparent quirkiness. We do this by the '+E0' trick. If we want to include floats in the check, we'll need to make it a bit more complicated. Here is a small test-rig. SELECT  PossibleNumber,         ISNUMERIC(CAST(PossibleNumber AS NVARCHAR(20)) + 'E+00') AS Hack,        ISNUMERIC (PossibleNumber + CASE WHEN PossibleNumber LIKE '%E%'                                          THEN '' ELSE 'E+00' END) AS Hackier,        ISNUMERIC(PossibleNumber) AS RawIsNumericFROM    (SELECT CAST(',' AS NVARCHAR(10)) AS PossibleNumber          UNION SELECT '£' UNION SELECT '.'         UNION SELECT '56' UNION SELECT '456.67890'         UNION SELECT '0E0' UNION SELECT '-'         UNION SELECT '-' UNION SELECT '.'         UNION  SELECT N'?' UNION SELECT N'¢'        UNION  SELECT N'?' UNION SELECT N'?34.56'         UNION SELECT '-345' UNION SELECT '3.332228E+09') AS examples Which gives the result ... PossibleNumber Hack Hackier RawIsNumeric-------------- ----------- ----------- ------------? 0 0 0- 0 0 1, 0 0 1. 0 0 1¢ 0 0 1£ 0 0 1? 0 0 0?34.56 0 0 00E0 0 1 13.332228E+09 0 1 1-345 1 1 1456.67890 1 1 156 1 1 1 I suspect that this is as far as you'll get before you abandon IsNumeric in favour of a regex. You can only get part of the way with the LIKE wildcards, because you cannot specify quantifiers. You'll need full-blown Regex strings like these ..[-+]?\b[0-9]+(\.[0-9]+)?\b #INT or REAL[-+]?\b[0-9]{1,3}\b #TINYINT[-+]?\b[0-9]{1,5}\b #SMALLINT.. but you'll get even these to fail to catch numbers out of range.So is IsNumeric() an out and out rogue function? Not really, I'd say, but then it would need a damned good lawyer.

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• StreamInsight 2.1 Released

  - by Roman Schindlauer

  The wait is over—we are pleased to announce the release of StreamInsight 2.1. Since the release of version 1.2, we have heard your feedbacks and suggestions and based on that we have come up with a whole new set of features. Here are some of the highlights: A New Programming Model – A more clear and consistent object model, eliminating the need for complex input and output adapters (though they are still completely supported). This new model allows you to provision, name, and manage data sources and sinks in the StreamInsight server. Tight integration with Reactive Framework (Rx) – You can write reactive queries hosted inside StreamInsight as well as compose temporal queries on reactive objects. High Availability – Check-pointing over temporal streams and multiple processes with shared computation. Here is how simple coding can be with the 2.1 Programming Model: class Program {     static void Main(string[] args)     {         using (Server server = Server.Create("Default"))         {             // Create an app             Application app = server.CreateApplication("app");             // Define a simple observable which generates an integer every second             var source = app.DefineObservable(() =>                 Observable.Interval(TimeSpan.FromSeconds(1)));             // Define a sink.             var sink = app.DefineObserver(() =>                 Observer.Create<long>(x => Console.WriteLine(x)));             // Define a query to filter the events             var query = from e in source                         where e % 2 == 0                         select e;             // Bind the query to the sink and create a runnable process             using (IDisposable proc = query.Bind(sink).Run("MyProcess"))             {                 Console.WriteLine("Press a key to dispose the process...");                 Console.ReadKey();             }         }     } }   That’s how easily you can define a source, sink and compose a query and run it. Note that we did not replace the existing APIs, they co-exist with the new surface. Stay tuned, you will see a series of articles coming out over the next few weeks about the new features and how to use them. Come and grab it from our download center page and let us know what you think! You can find the updated MSDN documentation here, and we would appreciate if you could provide feedback to the docs as well—best via email to [email protected]. Moreover, we updated our samples to demonstrate the new programming surface. Regards, The StreamInsight Team

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• StreamInsight 2.1 Released

  - by Roman Schindlauer

  The wait is over—we are pleased to announce the release of StreamInsight 2.1. Since the release of version 1.2, we have heard your feedbacks and suggestions and based on that we have come up with a whole new set of features. Here are some of the highlights: A New Programming Model – A more clear and consistent object model, eliminating the need for complex input and output adapters (though they are still completely supported). This new model allows you to provision, name, and manage data sources and sinks in the StreamInsight server. Tight integration with Reactive Framework (Rx) – You can write reactive queries hosted inside StreamInsight as well as compose temporal queries on reactive objects. High Availability – Check-pointing over temporal streams and multiple processes with shared computation. Here is how simple coding can be with the 2.1 Programming Model: class Program {     static void Main(string[] args)     {         using (Server server = Server.Create("Default"))         {             // Create an app             Application app = server.CreateApplication("app");             // Define a simple observable which generates an integer every second             var source = app.DefineObservable(() =>                 Observable.Interval(TimeSpan.FromSeconds(1)));             // Define a sink.             var sink = app.DefineObserver(() =>                 Observer.Create<long>(x => Console.WriteLine(x)));             // Define a query to filter the events             var query = from e in source                         where e % 2 == 0                         select e;             // Bind the query to the sink and create a runnable process             using (IDisposable proc = query.Bind(sink).Run("MyProcess"))             {                 Console.WriteLine("Press a key to dispose the process...");                 Console.ReadKey();             }         }     } }   That’s how easily you can define a source, sink and compose a query and run it. Note that we did not replace the existing APIs, they co-exist with the new surface. Stay tuned, you will see a series of articles coming out over the next few weeks about the new features and how to use them. Come and grab it from our download center page and let us know what you think! You can find the updated MSDN documentation here, and we would appreciate if you could provide feedback to the docs as well—best via email to [email protected]. Moreover, we updated our samples to demonstrate the new programming surface. Regards, The StreamInsight Team

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• Adaptive Connections For ADFBC

  - by Duncan Mills

  Some time ago I wrote an article on Adaptive Bindings showing how the pageDef for a an ADF UI does not have to be wedded to a fixed data control or collection / View Object. This article has proved pretty popular, so as a follow up I wanted to cover another "Adaptive" feature of your ADF applications, the ability to make multiple different connections from an Application Module, at runtime. Now, I'm sure you'll be aware that if you define your application to use a data-source rather than a hard-coded JDBC connection string, then you have the ability to change the target of that data-source after deployment to point to a different database. So that's great, but the reality of that is that this single connection is effectively fixed within the application right?  Well no, this it turns out is a common misconception. To be clear, yes a single instance of an ADF Application Module is associated with a single connection but there is nothing to stop you from creating multiple instances of the same Application Module within the application, all pointing at different connections.  If fact this has been possible for a long time using a custom extension point with code that which extends oracle.jbo.http.HttpSessionCookieFactory. This approach, however, involves writing code and no-one likes to write any more code than they need to, so, is there an easier way? Yes indeed.  It is in fact  a little publicized feature that's available in all versions of 11g, the ELEnvInfoProvider. What Does it Do?  The ELEnvInfoProvider  is  a pre-existing class (the full path is  oracle.jbo.client.ELEnvInfoProvider) which you can plug into your ApplicationModule configuration using the jbo.envinfoprovider property. Visuallty you can set this in the editor, or you can also set it directly in the bc4j.xcfg (see below for an example) . Once you have plugged in this envinfoprovider, here's the fun bit, rather than defining the hard-coded name of a datasource instead you can plug in a EL expression for the connection to use.  So what's the benefit of that? Well it allows you to defer the selection of a connection until the point in time that you instantiate the AM. To define the expression itself you'll need to do a couple of things: First of all you'll need a managed bean of some sort – e.g. a sessionScoped bean defined in your ViewController project. This will need a getter method that returns the name of the connection. Now this connection itself needs to be defined in your Application Server, and can be managed through Enterprise Manager, WLST or through MBeans. (You may need to read the documentation [http://docs.oracle.com/cd/E28280_01/web.1111/b31974/deployment_topics.htm#CHDJGBDD] here on how to configure connections at runtime if you're not familiar with this)   The EL expression (e.g. ${connectionManager.connection} is then defined in the configuration by editing the bc4j.xcfg file (there is a hyperlink directly to this file on the configuration editing screen in the Application Module editor). You simply replace the hardcoded JDBCName value with the expression.  So your cfg file would end up looking something like this (notice the reference to the ELEnvInfoProvider that I talked about earlier) <BC4JConfig version="11.1" xmlns="http://xmlns.oracle.com/bc4j/configuration">   <AppModuleConfigBag ApplicationName="oracle.demo.model.TargetAppModule">   <AppModuleConfig DeployPlatform="LOCAL"  JDBCName="${connectionManager.connection}" jbo.project="oracle.demo.model.Model" name="TargetAppModuleLocal" ApplicationName="oracle.demo.model.TargetAppModule"> <AM-Pooling jbo.doconnectionpooling="true"/> <Database jbo.locking.mode="optimistic">       <Security AppModuleJndiName="oracle.demo.model.TargetAppModule"/>    <Custom jbo.envinfoprovider="oracle.jbo.client.ELEnvInfoProvider"/> </AppModuleConfig> </AppModuleConfigBag> </BC4JConfig> Still Don't Quite Get It? So far you might be thinking, well that's fine but what difference does it make if the connection is resolved "just in time" rather than up front and changed as required through Enterprise Manager? Well a trivial example would be where you have a single application deployed to your application server, but for different users you want to connect to different databases. Because, the evaluation of the connection is deferred until you first reference the AM you have a decision point that can take the user identity into account. However, think about it for a second.  Under what circumstances does a new AM get instantiated? Well at the first reference of the AM within the application yes, but also whenever a Task Flow is entered -  if the data control scope for the Task Flow is ISOLATED.  So the reality is, that on a single screen you can embed multiple Task Flows, all of which are pointing at different database connections concurrently. Hopefully you'll find this feature useful, let me know... 

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• ??·???|WebLogic Channel|??????

  - by ???02

  Java?????????????????????Oracle WebLogic ??????????????????????????WebLogic?????????????????????????WebLogic????????????????????????????????????????????JPA 2?EJB 3.1?JSF 2????????! WebLogic Server 12c?????????Java EE 6?????? [ 2012/05/22 ]???????????! Java EE 6???????????????/???????!!――??UFJ????????????????????????Java EE 6??????JavaOne Tokyo 2012????? [ 2012/05/21 ]??????????????! Java EE 6???????????????/???????!!――??UFJ????????????????????????Java EE 6??????JavaOne???????????! Java EE 6???????????????/???????!!――??UFJ????????????????????????Java EE 6??????JavaOne Tokyo 2012???????UFJ?????????????????????????IT??????? ?????????UFJ?????????/????????2007?7????????????JavaEE5?????????Java EE??????????????????????2012?4???????JavaOne Tokyo 2012??????????Java EE 6?????????????????????????Java EE 6???????????????????????????????????????????Java EE 6???????"??????????????"???????????????????????????????????(???)??????????????????????????????/???????????Java EE??????????――??????????????????????JavaOne Tokyo 2012?????????????????????????????/???????????Java EE??????????――??????????????????????JavaOne Tokyo 2012???????????·???????????????????·???????????????????/????????????????????????????――?????6?????????????????????WebLogic Server?????????????????????????????????????????????????????????2012?4???????JavaOne Tokyo 2012????????????????????·????????????????Java EE???????????????????????????????(???)??????WebLogic Server 12c?????????Java EE 6??JPA 2?EJB 3.1?JSF 2????????! WebLogic Server 12c?????????Java EE 6??????????????????????????????????????????????·???????????Java EE 6???????????????·????WebLogic Server 12c?(???)?????????Oracle Enterprise Pack for Eclipse 12c???????Java EE 6??????3???????????????????????JSF 2.0?????????????????????????JAX-RS????RESTful?Web???????????????(???)??????JPA 2?EJB 3.1?JSF 2????????! WebLogic Server 12c?????????Java EE 6??????2012?2???????????????WebLogic Server 12c?????????Java EE 6?????????????????????????????????????????????????????????????Oracle Enterprise Pack for Eclipse 12c??WebLogic Server 12c(???)????Java EE 6??????3??????????????????????????????JPA 2.0??????????·?????????EJB 3.1???????·???????????????(???)??????JPA 2?EJB 3.1?JSF 2????????! WebLogic Server 12c?????????Java EE 6???????????·??????·?????????????????????????WebLogic Server?2012?2?????????????????WebLogic Server 12c????????????????????????Java SE 7???Java EE 6???????????Java EE??????????????????????????????WebLogic Server 12c????Java EE???????????????????????? ??????WebLogic Server 12c???????????????????Oracle Enterprise Pack for Eclipse 12c??WebLogic Server 12c(???)????Java EE 6??????3??????????????????????????????????????????????????????????Java EE?????????????????????????????????????????(???)??????Oracle Open World Tokyo 2012?????·????2013??Java SE 8????GUI???JavaFX?...Java SE??????――Oracle Open World Tokyo 2012?????·???????·??????????????????????????????????????????????????Java?????????????????????????1?????2012?4?4?~6???? ??????????Oracle Open World Tokyo 2012??????????·?????????Java Product Group??????·????????????·?????Java SE?????????????????????????Java SE??Java 12?????:Java SE????????????????????????????????Java SE?????????????????(???)??????WebLogic Server 12c?????????Java??????――Oracle Open World Tokyo 2012?????·????2012?4?4?~6???? ??????????Oracle Open World Tokyo 2012????????????Java?WebLogic Server??????????1???????????·???????? ?????????????????????·??????????????Oracle WebLogic Server 12c ???????????Java???- ???????Java EE??????????????????????????WebLogic Server??????????????????????(???)??????????????????IT?????????! Oracle OpenWorld Tokyo 2012?????????????!!????????????IT?????????! Oracle OpenWorld Tokyo 2012?????????????!!2012?4?4?~6???? ????????????????Oracle OpenWorld Tokyo 2012???????????????????????????????????Java????????????????????????????????????????????????????????IT???????????????IT????????????????? "?????"???????????WebLogic Server??????????????Java????????????????????????IT?????????????????????????????(???)???????Beginning Java EE 6?????????Java EE 6?????????????????Beginning Java EE 6?????????Java EE 6?????????????????JavaServer Faces 2???????6???????????????????????????????????????Java EE?WebLogic Server?????????????????·????????????????????????????????????????Java EE 6???????Java EE??????????? ??????Java EE 6??????????Beginning Java EE 6 GlassFish 3????????????Java????????????????????????Web?????????GUI?????JavaServer Faces??????(???)???????Beginning Java EE 6?????????Java EE 6?????????????????Java Persistance API 2??2012?2???????????????Oracle WebLogic Server 12c????????????Java EE 6?????????????????Java EE 6?????Java EE ??????????????1??????????????????????Java EE?????????????? ???3??????????Java EE 6??????????Beginning Java EE 6 GlassFish 3????????????Java????????????????????????????????Java EE 6???????API?????????????????????????????????(???)??????4?4??5??Java??????????! "Java??"????????????!!――?JavaOne Tokyo 2012????????4?4??5??Java??????????! "Java??"????????????!!――?JavaOne Tokyo 2012????????2012?4?4?~5??2?????????????????49????Java????????????????JavaOne Tokyo 2012???????? "Java??????"??????JavaOne??Java??????????????·???????????????????????????????????????????????????JavaOne Tokyo 2012???????????????(???)???????????????????????Java EE 6???????????!?――WebLogic Server 12c???????????????????????????Java EE 6???????????!?――WebLogic Server 12c???????????????·??????·??????????????????????????????WebLogic Serve????WebLogic Server 12c?????????????200???????/????????????????·????"??"?1????Java EE 6?????????????????????????????????????? ??????·?????????WebLogic Server???????Java????????????????Java EE??????????????????????·?????????(???)???????Oracle WebLogic Server 12c Forum?????Java EE 6????????????????????????? ?????????????――?Oracle WebLogic Server 12c Forum?????Java EE 6?????????????????????????????Oracle WebLogic Server 12c??????????????????????????????????????? 1?25????????Oracle WebLogic Server 12c Forum - ????????Java??????????? -??????????·?????????WebLogic Server 12c??????? Java EE 6?? ~Java EE 6???????????????????~??????????????UFJ???????????????????????????????????????Publickey ??????Java EE 6????WebLogic Server 12c???????????????(???)??????Java EE 6?????????????? "?"????? ??????????????Oracle WebLogic Server 12c??????????????????????Java EE?????Java EE 6??????????????????????????????Java EE 6?????????WebLogic Server 12c??????????Java????????????????????? 1?25????????Oracle WebLogic Server 12c Forum - ????????Java??????????? -?????WebLogic Server 12c??????? Java EE 6?? ~Java EE 6???????????????????~????????·???????????????????????????Java?????????????Java EE 6?WebLogic Server??????????????2??????????(???)?????????????Java EE??????WebLogic Server 12c??????3????――?Oracle WebLogic Server 12c Forum????????????2012?2?7??Java EE??????????·???????Oracle WebLogic Server 12c?????????????????????1?25????????????Oracle WebLogic Server 12c Forum - ????????Java??????????? -????Java EE 6?Java SE 7???????Java???????WebLogic Server 12c?????????????????·?????????????????????3??????????????????????(???)????????????????????·??????????! ????WebLogic Server?????????????????????????Java EE????????·????????????????/??????????????????????·?????????????????????????WebLogic Server?????????????WebLogic Server???????????????????·??????????????????????????????????????????????????????????(???)?????????????????????????????????Java EE???????????????????????·???????????????????·??????????????????????????????????·???????????????????????????????????WebLogic Server?????????????????????????·???????????????????????????????2??????????WebLogic Server???????????????????·????????????????????????????????WebLogic Server?????????????????????(???)???????????????????WebLogic Server???????“???”????????????????/???????????????????WebLogic Server???????????????????――???????WebLogic Server???????????????1???????????????????????????????????·????????????????????2011?11????????Oracle DBA & Developers Days 2011??????????????????????????WebLogic Server???????????????????????????????????????????????/?????????????????????????(???)????????????????/??????????????WebLogic Server???????????????????????????????????????????????????????????????????????????1???????????????????????????????????????????????????WebLogic Server???????????????????????????????????????????????????????????????????????·?????????????????????·??????????????????????????????????????????????????2011?11????????Oracle DBA & Developers Days 2011??????????????????????????WebLogic Server??????????????????WebLogic Server???????????????????????????????????????????????????·?????????????????????????????2??????????????????????????????????????????????·??????????(???)??????????JavaFX??Java???????·??????????????――?Java Developer Workshop #2?????????JavaFX??Java???????·??????????????――?Java Developer Workshop #2?????WebLogic Server?????????Java???????????????????WebLogic Channel?????????JavaOne 2011??Java/Java EE????????!――???????????????!!?????????????????????JavaOne 2011????????????????????????????????????JavaFX?????2011?12?1?????????????Java?????????????Java Developer Workshop #2????JavaOne 2011?JavaFX???????????????Oracle Corporation?JavaFX??????Nandini Ramani?(Client Java Group???????????)??????JavaFX 2.0-Next generation Java client solution????????????????????JavaFX?????????????????????(???)????????UFJ??????????????????????·?????WebLogic Server????????――????? ?????? ????? 2011???????UFJ??????????????????????·?????WebLogic Server????????――????? ?????? ????? 2011???????UFJ???????·?????IT????????UFJ???????????????(MUIT)?????UFJ?????????????????????????·????·????????????????????????WebLogic Server???????????????????·?????????IT?????????WebLogic Server??????? MUIT IT??????? ??????????2011?11?30???????????? ?????? ????? 2011??????????UFJ???????????????????Java EE???????WebLogic Server????????????????????(???)??????????????! ??????????????????WebLogic Server 12c?????????! ??????????????????WebLogic Server 12c????????2011?12?9??WebLogic Server????Oracle WebLogic Server 12c??????????????????12?1????????????????????·?????10????????Oracle OpenWorld 2011?????????????????????????????1?????????????????????????????????????????Oracle Corporation??????? ???·????????????·??????????????????????????????(???)??????????·???????! ?WebLogic Scripting Tool????WebLogic Server???/???????????·???????! ?WebLogic Scripting Tool????WebLogic Server???/???????Web???????????/?????????????????????????????????????????????? ??????????????????????????????????????????????????????????????????????????????WebLogic Server?????????????????WebLogic Scripting Tool??????????2011?11????????Oracle DAB & Developers Days 2011?????????????????????????!WebLogic Scripting Tool?????WLS???·????????????WebLogic Scripting Tool?????????????????(???)??????Java EE???????????!? ?Oracle ADF???????!!Java EE???????????!? ?Oracle ADF???????!!WebLogic Server???Java EE??????????????????????Oracle Application Development Framework(ADF)????????????Oracle ADF????????????????????????????????????????GUI?????????????????Web???????????????????????????????????????/??????????????????????Fusion Application???????/?????????Oracle ADF?????????Java EE????????????????????????????? Fusion Middleware?????????????????????????Oracle ADF???????????????(???)??????????:10?????Java EE???????WebLogic Server?????????:10?????Java EE???????WebLogic Server?????11?30?????????????????????2011??WebLogic Server ?????????????????????Oracle OpenWorld 2011????WebLogic Server?????????Oracle OpenWorld 2011????WebLogic Server?????????2011?10?2?~6??????????????????????Oracle OpenWorld 2011???????????????????????????????????????????????????WebLogic Server??????????????????????? Fusion Middleware?????? ???????? ?????????????????????????WebLogic Server??????????????????(???)???????JavaOne 2011??Java/Java EE????????!――???????????????!!?JavaOne 2011??Java/Java EE????????!――???????????????!!WebLogic Server??????????????????1??????Java/Java EE??????????????????????????????????Java????JavaOne???2011?10?2?~6?????????????????????JavaOne 2011????????????Java/Java EE?????????????????????????Java???????????????????JavaOne 2011??????????????(???)??????WebLogic?RAC????????????――Active GridLink for RAC?????????????4????WebLogic Suite 11g???????Active GridLink for RAC???Oracle Database???????????Oracle Real Application Clusters(RAC)??WebLogic Server??????????????????????????????????????????????????????????????·??????????Frances Zhao?(Oracle Application Server ??????·?????·?????)???????????????(???)??????????RAC??????????????????????????????????Oracle Database??????????????Oracle Real Application Clusters(RAC)????????????????????????????????????????????RAC????Oracle WebLogic Server????????????WebLogic Suite 11g?????????WebLogic Server/RAC???????Active GridLink for RAC????????????????????·??????????Frances Zhao?(Oracle Application Server ??????·?????·?????)???????????2??????????(???)????????JRockit Mission Control! ?????WebLogic?????????????????????????????????????Oracle WebLogic Server Enterprise Edition??????????????JRockit Mission Control??????OS??Web?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????JRockit Mission Control?????????????????????????????????????????Application Grid???????? ????????????????? ???(?????? Fusion Middleware?????? ???????????)??????????????????JRockit Mission Control?????????(???)???????????????OutOfMemory?????????????????WebLogic Server Enterprise Edition????????????JRockit Mission Control????????????????????????????????????????????????????????????????????????????????Application Grid???????? ????????????????? ???(?????? Fusion Middleware?????? ???????????)??????????????????JRockit Mission Control?????2?????(???)???????WebLogic & Java EE???????????????Java EE????WebLogic Server???????????20????????????????????????/???????????Java EE???WebLogic Server????????????????IT(????)?????????????????????????????????????/??????????????????????????????????????????/?????????????????????????2011?9?6???????????????????WebLogic & Java EE????????????????????????????Java EE?WebLogic Server????????????(???)???????????????????Java EE?????????????10????????????????????????·??????????????????????Java EE?????·?????????????·?????????IT??????????????????Java EE??????????????????????――2011?9?6????????WebLogic & Java EE????????????????????――Java EE???????????????????????????·??????????????????Java EE????????????????????????????????(???)??????Java???????????????????·?????Oracle Coherence??6??????????????Java API?????????????????????????·??????????/????·?????????????Java???????????????????????????????????????1??????????Java??????????·???????????????????????????????????????????????????????Java????????????????????????????????·???????Oracle Coherence????????????????????????????????????????????????Coherence??Java?????????????????????????????????????????????????????2??????Oracle Coherence?Java???????????????????????????????????(???)????????????????????????????????/????????????????????????·?????????????????????????????·???????Oracle Coherence??????Java???????????????????????????????????????????????????????????????????Java API??????Oracle Coherence???????????3????????????????????????Coherence???????????????????????????????3???????????(???)??????????????! ?????????????????JRockit Flight Recorder????????????! ?????????????????JRockit Flight Recorder???????????????????????????????????????????WebLogic Server????????·??????????????????????????????????????????????WebLogic Server????????????????????????????????????????????????????????????????????????JRockit Flight Recorder???WebLogic Server????????????????????????????????????????????????????????????????????????????????????????(???)??????????????????――???????/????????????????·??????????WebLogic Server?????Java+?????·??????????????????????????·???????????????????????????·???????????????????????????????????????WebLogic Server???????????????????????????? WebLogic Server??????·??????·???????????????????????????????????Publickey???????IT???????????????WebLogic Server??????????????????????????????????(???)???????????????????????????WebLogic Server??????????????????IT?????????????????·????????????????????????????????????????????????·???????????????????????????????????――??????Publickey???????IT?????????????????????????????????WebLogic Server????????????????????(???)????????????????????????????WebLogic Server????????·??????????――?????·??????·???????????WebLogic?????Java EE??????????·????????????????????????????·??????·??????????????WebLogic Server???????????????????????????????????????·???????????????????????????????????·???????????????????????????????????????WebLogic Server????????? ????????????????????????2??????????(???)???????????????????????????TCO?――????????????????WebLogic???????????????????/????????????????????????????·???????????????????????????????????????????????????????????WebLogic Server??????(????????)???????????????????????????Oracle Database??????????????????????TCO??????????????????·??????·??????????WebLogic Server???????????????????????(???)??????WebLogic Channel ?????WebLogic Channel ????? WebLogic?????Java EE ????????????????????WebLogic Channel???????????Java EE???????????·??????????????WebLogic Server ??????Tips???????????????????????????????????????????Oracle WebLogic Server??????Oracle WebLogic Server ??WebLogic Server?????????????·??·???????????????????????????????????????????" src="https://blogs.oracle.com/weblogic_channel/resource/images/wc2_directory.jpg"?Know How?WebLogic Server - ???????·???????WebLogic?????????????????????????know How?Oracle WebLogic Server 11g? JRuby?JMX???????WebLogic Server - JRuby?JMX?????[know How]Oracle WebLogic Server?JDBC GridLink????????????????·??????(MDS)?????????Oracle WebLogic Active GridLink for RAC?????????????Pick-Up???????WebLogic Server JDBC???·???????(10.3.4)Oracle WebLogic Server JDBC???·???(10.3.4)????????????????????????????Pick-Up????????????Web??????????Oracle WebLogic Server 11g?Microsoft .NET WCF 4.0????? ???????????????????????????????WebLogic Server?Microsoft .NET???????????????????????????Oracle WebLogic Server - JDBC??????JDBC????????????????????(????????????)????????????????????????????????????????????????????WebLogic Server - ????????/??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????WebLogic Server - ???????·??????Oracle WebLogic Server??Web???????????????????????????????????????????????????????????????????????????????????????????????????WebLogic Server - Web???????????Web??????????WebLogic???????????JAX-WS?????Web????????????????????????????????30?????WebLogic Server 11g????Oracle WebLogic Server 11g?????????????30??????????????????????WebLogic Server - Enterprise Grid Messaging WebLogic Server?Java EE?JMS???JMS????????????JMS??????????????????????????????????????????????????????????????????????Oracle WebLogic Server - GridLink for RAC 　JDBC??????????GridLink for RAC???????????????????????????Oracle???????????????????????·????! WebLogic Server ? Oracle Database ??????????????????????????????????????????????????????????????Oracle WebLogic Server ???????WebLogic Server???????????????????????????????????Java????????????????????????????????????????????????????????????????????????????????????　??????????????????WebLogic Server?????????????????????????????????????????????????????????????????????????????????????????·????????????WebLogic Server?????????????????????!WebLogic Server??????????????? ????·??·???????????????????????????????????????????????????????????? ??·?????????????????????? Oracle WebLogic Server 11g ??????WebLogic Server????????????????11g???????????????????? ???????????WebLogic Server(JRockit) - ???????????????????????????Oracle JRockit JVM????????????????????????????????????????JVM???????????????????????????????????????????????Pick-Up???????Oracle JDeveloper?Oracle ADF 11g?Release 2(11.1.2.0.0):???Oracle JDeveloper?Oracle ADF?11g Release 2(11.1.2.0.0)????????????Pick-Up???????Oracle JRockit????·????JRockit????·???????????????????????????????????????????????????????????????????JVM??????JRockit JVM?????????????????????????????????????????????????????????Pick-Up??????????? JVM ?JRockit????????·??????Oracle JRockit JVM?????????????????????·?????????????????????????JVM??????? ???????????????????????????????????????????????????????????????????????? ???????????????????????????????! ????JVM?JRockit????JVM?Oracle JRockit???????????????????????????????????Flight Recorder????????????????

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• jquery ui draggable elements not 'draggable' outside of scrolling div

  - by Stu

  hello all, i am super stumped. i have many elements (floating href tags) in a div with a set height/width, with scroll set to "overflow: auto" in the css. this is the structure of the divs: <div id="tagFun_div_main"> <div id="tf_div_tagsReturn"> <!-- all the draggable elements go in here, the parent div scolls --> </div> <div id=" tf_div_tagsDrop"> <div id="tf_dropBox"></div> </div></div> the parent div's, 'tf_div_tagsReturn' and 'tf_div_tagsDrop' will ultimately float next to each other. here is the jquery which is run after all of the 'draggable' elements have been created with class name 'tag_cell', : $(function() { $(".tag_cell").draggable({ revert: 'invalid', scroll: false, containment: '#tagFun_div_main' }); $("#tf_dropBox").droppable({ accept: '.tag_cell', hoverClass: 'tf_dropBox_hover', activeClass: 'tf_dropBox_active', drop: function(event, ui) { GLOBAL_ary_tf_tags.push(ui.draggable.html()); tagFun_reload(); } }); }); as i stated above, the draggable elements are draggable within div 'tf_div_tagsReturn', but they do not visually drag outside of that parent div. worthy to note, if i am dragging one of the draggable elements, and move the mouse over the droppable div, with id 'tf_dropBox', then the hoverclass is fired, i just can't see the draggable element any more. thank you very much for any advice on helping me find a solution. this is my first run at using jquery, so hopefully i am just missing something super obvious. i've been reading the documentation and searching forums thus far to no prevail :( thank you for your time. UPDATE: many thanks to Jabes88 for providing the solution which allowed me to achieve the functionality i was looking for, here is what my jquery ended up looking like, feel free to critique it, as i am new to jquery. $(function() { $(".tag_cell").draggable({ revert: 'invalid', scroll: false, containment: '#tagFun_div_main', helper: 'clone', start : function() { this.style.display="none"; }, stop: function() { this.style.display=""; } }); $(".tf_dropBox").droppable({ accept: '.tag_cell', hoverClass: 'tf_dropBox_hover', activeClass: 'tf_dropBox_active', drop: function(event, ui) { GLOBAL_ary_tf_tags.push(ui.draggable.html()); tagFun_reload(); } }); });

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• Facebook Oauth Logout

  - by Derek Troy-West

  I have an application that integrates with Facebook using Oauth 2. I can authorize with FB and query their REST and Graph APIs perfectly well, but when I authorize an active browser session is created with FB. I can then log-out of my application just fine, but the session with FB persists, so if anyone else uses the browser they will see the previous users FB account (unless the previous user manually logs out of FB also). The steps I take to authorize are: Call [LINK: graph.facebook.com/oauth/authorize?client_id...] This step opens a Facebook login/connect window if the user's browser doesn't already have an active FB session. Once they log-in to facebook they redirect to my site with a code I can exchange for an oauth token. Call [LINK: graph.facebook.com/oauth/access_token?client_id..] with the code from (1) Now I have an Oauth Token, and the user's browser is logged into my site, and into FB. I call a bunch of APIs to do stuff: i.e. [LINK: graph.facebook.com/me?access_token=..] Lets say my user wants to log out of my site. The FB terms and conditions demand that I perform Single Sign Off, so when the user logs out of my site, they also are logged out of Facebook. There are arguments that this is a bit daft, but I'm happy to comply if there is any way of actually achieving that. I have seen suggestions that: A. I use the Javascript API to logout: FB.Connect.logout(). Well I tried using that, but it didn't work, and I'm not sure exactly how it could, as I don't use the Javascript API in any way on my site. The session isn't maintained or created by the Javascript API so I'm not sure how it's supposed to expire it either. B. Use [LINK: facebook.com/logout.php]. This was suggested by an admin in the Facebook forums some time ago. The example given related to the old way of getting FB sessions (non-oauth) so I don't think I can apply it in my case. C. Use the old REST api expireSession or revokeAuthorization. I tried both of these and while they do expire the Oauth token they don't invalidate the session that the browser is currently using so it has no effect, the user is not logged out of Facebook. I'm really at a bit of a loose end, the Facebook documentation is patchy, ambiguous and pretty poor. The support on the forums is non-existant, at the moment I can't even log in to the facebook forum, and aside from that, their own FB Connect integration doesn't even work on the forum itself. Doesn't inspire much confidence. Ta for any help you can offer. Derek ps. Had to change HTTPS to LINK, not enough karma to post links which is probably fair enough.

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• Oauth for Google API example using Python / Django

  - by DrDee

  Hi, I am trying to get Oauth working with the Google API using Python. I have tried different oauth libraries such as oauth, oauth2 and djanog-oauth but I cannot get it to work (including the provided examples). For debugging Oauth I use Google's Oauth Playground and I have studied the API and the Oauth documentation With some libraries I am struggling with getting a right signature, with other libraries I am struggling with converting the request token to an authorized token. What would really help me if someone can show me a working example for the Google API using one of the above-mentioned libraries. EDIT: My initial question did not lead to any answers so I have added my code. There are two possible causes of this code not working: 1) Google does not authorize my request token, but not quite sure how to detect this 2) THe signature for the access token is invalid but then I would like to know which oauth parameters Google is expecting as I am able to generate a proper signature in the first phase. This is written using oauth2.py and for Django hence the HttpResponseRedirect. REQUEST_TOKEN_URL = 'https://www.google.com/accounts/OAuthGetRequestToken' AUTHORIZATION_URL = 'https://www.google.com/accounts/OAuthAuthorizeToken' ACCESS_TOKEN_URL = 'https://www.google.com/accounts/OAuthGetAccessToken' CALLBACK = 'http://localhost:8000/mappr/mappr/oauth/' #will become real server when deployed OAUTH_CONSUMER_KEY = 'anonymous' OAUTH_CONSUMER_SECRET = 'anonymous' signature_method = oauth.SignatureMethod_HMAC_SHA1() consumer = oauth.Consumer(key=OAUTH_CONSUMER_KEY, secret=OAUTH_CONSUMER_SECRET) client = oauth.Client(consumer) request_token = oauth.Token('','') #hackish way to be able to access the token in different functions, I know this is bad, but I just want it to get working in the first place :) def authorize(request): if request.GET == {}: tokens = OAuthGetRequestToken() return HttpResponseRedirect(AUTHORIZATION_URL + '?' + tokens) elif request.GET['oauth_verifier'] != '': oauth_token = request.GET['oauth_token'] oauth_verifier = request.GET['oauth_verifier'] OAuthAuthorizeToken(oauth_token) OAuthGetAccessToken(oauth_token, oauth_verifier) #I need to add a Django return object but I am still debugging other phases. def OAuthGetRequestToken(): print '*** OUTPUT OAuthGetRequestToken ***' params = { 'oauth_consumer_key': OAUTH_CONSUMER_KEY, 'oauth_nonce': oauth.generate_nonce(), 'oauth_signature_method': 'HMAC-SHA1', 'oauth_timestamp': int(time.time()), #The timestamp should be expressed in number of seconds after January 1, 1970 00:00:00 GMT. 'scope': 'https://www.google.com/analytics/feeds/', 'oauth_callback': CALLBACK, 'oauth_version': '1.0' } # Sign the request. req = oauth.Request(method="GET", url=REQUEST_TOKEN_URL, parameters=params) req.sign_request(signature_method, consumer, None) tokens =client.request(req.to_url())[1] params = ConvertURLParamstoDictionary(tokens) request_token.key = params['oauth_token'] request_token.secret = params['oauth_token_secret'] return tokens def OAuthAuthorizeToken(oauth_token): print '*** OUTPUT OAuthAuthorizeToken ***' params ={ 'oauth_token' :oauth_token, 'hd': 'default' } req = oauth.Request(method="GET", url=AUTHORIZATION_URL, parameters=params) req.sign_request(signature_method, consumer, request_token) response =client.request(req.to_url()) print response #for debugging purposes def OAuthGetAccessToken(oauth_token, oauth_verifier): print '*** OUTPUT OAuthGetAccessToken ***' params = { 'oauth_consumer_key': OAUTH_CONSUMER_KEY, 'oauth_token': oauth_token, 'oauth_verifier': oauth_verifier, 'oauth_token_secret': request_token.secret, 'oauth_signature_method': 'HMAC-SHA1', 'oauth_timestamp': int(time.time()), 'oauth_nonce': oauth.generate_nonce(), 'oauth_version': '1.0', } req = oauth.Request(method="GET", url=ACCESS_TOKEN_URL, parameters=params) req.sign_request(signature_method, consumer, request_token) response =client.request(req.to_url()) print response return req def ConvertURLParamstoDictionary(tokens): params = {} tokens = tokens.split('&') for token in tokens: token = token.split('=') params[token[0]] = token[1] return params

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• WPF: Animating TranslateTransform from code

  - by ghostskunks

  I have a WPF canvas on which I'm dynamically creating objects from code. These objects are being transformed by setting the RenderTransform property, and an animation needs to be applied one of those transforms. Currently, I can't get properties of any transform to animate (although no exception gets raised and the animation appears to run - the completed event gets raised). In addition, if the animation system is stressed, sometimes the Storyboard.Completed event is never raised. All the examples I've come accross animate the transforms from XAML. MSDN documentation suggests that the x:Name property of a transform must be set for it to be animatable, but I haven't found a working way to set it from code. Any ideas? Here's the full code listing that reproduces the problem: using System; using System.Diagnostics; using System.Windows; using System.Windows.Controls; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Animation; using System.Windows.Shapes; namespace AnimationCompletedTest { /// <summary> /// Interaction logic for MainWindow.xaml /// </summary> public partial class MainWindow : Window { Canvas panel; public MainWindow() { InitializeComponent(); MouseDown += DoDynamicAnimation; Content = panel = new Canvas(); } void DoDynamicAnimation(object sender, MouseButtonEventArgs args) { for (int i = 0; i < 12; ++i) { var e = new Ellipse { Width = 16, Height = 16, Fill = SystemColors.HighlightBrush }; Canvas.SetLeft(e, Mouse.GetPosition(this).X); Canvas.SetTop(e, Mouse.GetPosition(this).Y); var tg = new TransformGroup(); var translation = new TranslateTransform(30, 0); tg.Children.Add(translation); tg.Children.Add(new RotateTransform(i * 30)); e.RenderTransform = tg; panel.Children.Add(e); var s = new Storyboard(); Storyboard.SetTarget(s, translation); Storyboard.SetTargetProperty(s, new PropertyPath(TranslateTransform.XProperty)); s.Children.Add( new DoubleAnimation(3, 100, new Duration(new TimeSpan(0, 0, 0, 1, 0))) { EasingFunction = new PowerEase {EasingMode = EasingMode.EaseOut} }); s.Completed += (sndr, evtArgs) => { Debug.WriteLine("Animation {0} completed {1}", s.GetHashCode(), Stopwatch.GetTimestamp()); panel.Children.Remove(e); }; Debug.WriteLine("Animation {0} started {1}", s.GetHashCode(), Stopwatch.GetTimestamp()); s.Begin(); } } [STAThread] public static void Main() { var app = new Application(); app.Run(new MainWindow()); } } }

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• Scrum Master Stephen Forte Teaches Agile Development, Silverlight and BI at GIDS 2010

  - by rajesh ahuja

  Great Indian Developer Summit 2010 – Gold Standard for India's Software Developer Ecosystem Bangalore, March 25, 2010: The author of several books on application and database development including Programming SQL Server 2008 and certified Scrum Master Stephen Forte is coming this summer to India's biggest summit for the developer ecosystem - Great Indian Developer Summit. At the summit, Stephen will conduct a workshop guaranteed to give attendees a jump start in taking a certified scrum master exam. Scrum, one of the most popular Agile project management and development methods, which is starting to be adopted at major corporations and on very large projects. After an introduction to the basics of Scrum like project planning and estimation, the Scrum Master, team, product owner and burn down, and of course the daily Scrum, Stephen will show many real world applications of the methodology drawn from his own experience as a Scrum Master. Negotiating with the business, estimation and team dynamics are all discussed as well as how to use Scrum in small organizations, large enterprise environments and consulting environments. Stephen will also discuss using Scrum with virtual teams and an off-shoring environment. He will then take a look at the tools we will use for Agile development, including planning poker, unit testing, and much more. On 20th April at the GIDS.NET Conference, Stephen will also conduct a series of sessions on Microsoft computing technologies. He will teach how to build data driven, n-tier Rich Internet Applications (RIA) with Silverlight 4.0. Line of business applications (LOB) in Silverlight 4.0 are easy by tapping the power of WCF RIA Services, the Silverlight Toolkit, and elevated out of browser support. Stephen's demo centric session will walk you through an example of building a LOB application with Silverlight 4.0. See how Silverlight and WCF RIA Services support domain logic, services, data binding, validation, server based paging, authentication, authorization and much more. Silverlight 4.0 means business. Silverlight runs C# and Visual Basic code, and so it seems natural that a business application might share some code between the Silverlight client and its ASP.NET Web server. You may want to run some code client-side for interactivity, but re-run that code on the server for security or reliability. This is possible, and there are several techniques you can use to accomplish this goal. In Stephen's second talk learn about the various techniques and their pros and cons. Some techniques work better in C#, others in VB. Still others are simpler with a little extra tooling or code-generation. Any serious Silverlight business application will almost certainly face this issue, and this session gets you going fast. In the third talk, Stephen will explain how to properly architect and deploy a BI application using a mix of some exciting new tools and some old familiar ones. He will start with a traditional relational transaction centric database (OLTP) and explore ways to build a data warehouse (OLAP), looking at the star and snowflake schemas. Next he will look at the process of extraction, transformation, and loading (ETL) your OLTP data into your data warehouse. Different techniques for ETL will be described and the various tradeoffs will be discussed. Then he will look at using the warehouse for reporting, drill down, and data analysis in Microsoft Excel's PowerPivot 2010. The session will round off by showing how to properly build a cube and build a data analysis application on top of that cube, and conclude by looking at some tools to help with the data visualization process. Every year, GIDS is a game changer for several thousands of IT professionals, providing them with a competitive edge over their peers, enlightening them with bleeding-edge information most useful in their daily jobs, helping them network with world-class experts and visionaries, and providing them with a much needed thrust in their careers. Attend Great Indian Developer Summit to gain the information, education and solutions you seek. From post-conference workshops, breakout sessions by expert instructors, keynotes by industry heavyweights, enhanced networking opportunities, and more. About Great Indian Developer Summit Great Indian Developer Summit is the gold standard for India's software developer ecosystem for gaining exposure to and evaluating new projects, tools, services, platforms, languages, software and standards. Packed with premium knowledge, action plans and advise from been-there-done-it veterans, creators, and visionaries, the 2010 edition of Great Indian Developer Summit features focused sessions, case studies, workshops and power panels that will transform you into a force to reckon with. Featuring 3 co-located conferences: GIDS.NET, GIDS.Web, GIDS.Java and an exclusive day of in-depth tutorials - GIDS.Workshops, from 20 April to 24 April at the IISc campus in Bangalore. At GIDS you'll participate in hundreds of sessions encompassing the full range of Microsoft computing, Java, Agile, RIA, Rich Web, open source/standards, languages, frameworks and platforms, practical tutorials that deep dive into technical skill and best practices, inspirational keynote presentations, an Expo Hall featuring dozens of the latest projects and products activities, engaging networking events, and the interact with the best and brightest of speakers from around the world. For further information on GIDS 2010, please visit the summit on the web http://www.developersummit.com/ A Saltmarch Media Press Release E: [email protected] Ph: +91 80 4005 1000

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• java 7 upgrade and hibernate annotation processor error

  - by Bill Turner

  I am getting the following warning, which seems to be triggering a subsequent warning and an error. I have been googling like mad, though have not found anything that makes it clear what it is I should do to resolve this. This issue occurs when I execute an Ant build. I am trying to migrate our project to Java 7. I have changed all the source='1.6' and target="1.6" to 1.7. I did find this related article: Forward compatible Java 6 annotation processor and SupportedSourceVersion It seems to indicate that I should build the Hibernate annotation processor jar myself, compiling it with with 1.7. It does not seem I should be required to do so. The latest version of the class in question (in hibernate-validator-annotation-processor-5.0.1.Final.jar) has been compiled with 1.6. Since the code in said class refers to SourceVersion.latestSupported(), and the 1.6 of that returns only RELEASE_6, there does not seem to be a generally available solution. Here is the warning: [javac] warning: Supported source version 'RELEASE_6' from annotation processor 'org.hibernate.validator.ap.ConstraintValidationProcessor' less than -source '1.7' And, here are the subsequent warnings/error. [javac] warning: No processor claimed any of these annotations: javax.persistence.PersistenceContext,javax.persistence.Column,org.codehaus.jackson.annotate.JsonIgnore,javax.persistence.Id,org.springframework.context.annotation.DependsOn,com.trgr.cobalt.infrastructure.datasource.Bucketed,org.codehaus.jackson.map.annotate.JsonDeserialize,javax.persistence.DiscriminatorColumn,com.trgr.cobalt.dataroom.authorization.secure.Secured,org.hibernate.annotations.GenericGenerator,javax.annotation.Resource,com.trgr.cobalt.infrastructure.spring.domain.DomainField,org.codehaus.jackson.annotate.JsonAutoDetect,javax.persistence.DiscriminatorValue,com.trgr.cobalt.dataroom.datasource.config.core.CoreTransactionMandatory,org.springframework.stereotype.Repository,javax.persistence.GeneratedValue,com.trgr.cobalt.dataroom.datasource.config.core.CoreTransactional,org.hibernate.annotations.Cascade,javax.persistence.Table,javax.persistence.Enumerated,org.hibernate.annotations.FilterDef,javax.persistence.OneToOne,com.trgr.cobalt.dataroom.datasource.config.core.CoreEntity,org.springframework.transaction.annotation.Transactional,com.trgr.cobalt.infrastructure.util.enums.EnumConversion,org.springframework.context.annotation.Configuration,com.trgr.cobalt.infrastructure.spring.domain.UpdatedFields,com.trgr.cobalt.infrastructure.spring.documentation.SampleValue,org.springframework.context.annotation.Bean,org.codehaus.jackson.annotate.JsonProperty,javax.persistence.Basic,org.codehaus.jackson.map.annotate.JsonSerialize,com.trgr.cobalt.infrastructure.spring.validation.Required,com.trgr.cobalt.dataroom.datasource.config.core.CoreTransactionNever,org.springframework.context.annotation.Profile,com.trgr.cobalt.infrastructure.spring.stereotype.Persistor,javax.persistence.Transient,com.trgr.cobalt.infrastructure.spring.validation.NotNull,javax.validation.constraints.Size,javax.persistence.Entity,javax.persistence.PrimaryKeyJoinColumn,org.hibernate.annotations.BatchSize,org.springframework.stereotype.Service,org.springframework.beans.factory.annotation.Value,javax.persistence.Inheritance [javac] error: warnings found and -Werror specified TIA!

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• GLFW 3 initialized, yet not?

  - by mSkull

  I'm struggling with creating a window with the GLFW 3 function, glfwCreateWindow. I have set an error callback function, that pretty much just prints out the error number and description, and according to that the GLFW library have not been initialized, even though the glfwInit function just returned success? Here's an outtake from my code // Error callback function prints out any errors from GFLW to the console static void error_callback( int error, const char *description ) { cout << error << '\t' << description << endl; } bool Base::Init() { // Set error callback /*! * According to the documentation this can be use before glfwInit, * and removing won't change anything anyway */ glfwSetErrorCallback( error_callback ); // Initialize GLFW /*! * This return succesfull, but... */ if( !glfwInit() ) { cout << "INITIALIZER: Failed to initialize GLFW!" << endl; return false; } else { cout << "INITIALIZER: GLFW Initialized successfully!" << endl; } // Create window /*! * When this is called, or any other glfw functions, I get a * "65537 The GLFW library is not initialized" in the console, through * the error_callback function */ window = glfwCreateWindow( 800, 600, "GLFW Window", NULL, NULL ); if( !window ) { cout << "INITIALIZER: Failed to create window!" << endl; glfwTerminate(); return false; } // Set window to current context glfwMakeContextCurrent( window ); ... return true; } And here's what's printed out in the console INITIALIZER: GLFW Initialized succesfully! 65537 The GLFW library is not initialized INITIALIZER: Failed to create window! I think I'm getting the error because of the setup isn't entirely correct, but I've done the best I can with what I could find around the place I downloaded the windows 32 from glfw.org and stuck the 2 includes files from it into minGW/include/GLFW, the 2 .a files (from the lib-mingw folder) into minGW/lib and the dll, also from the lib-mingw folder, into Windows/System32 In code::blocks I have, from build options - linker settings, linked the 2 .a files from the download. I believe I need to link more things, but I can figure out what, or where I should get those things from.

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• Android mapView ItemizedOverlay setFocus does not work properly

  - by Gaks

  Calling setFocus(null) on the ItemizedOverlay does not 'unfocus' current marker. According to the documentation: ... If the Item is not found, this is a no-op. You can also pass null to remove focus. Here's my code: MapItemizedOverlay public class MapItemizedOverlay extends ItemizedOverlay<OverlayItem> { private ArrayList<OverlayItem> items = new ArrayList<OverlayItem>(); public MapItemizedOverlay(Drawable defaultMarker) { super(defaultMarker); } public void addOverlay(OverlayItem overlay) { items.add(overlay); populate(); } @Override protected OverlayItem createItem(int i) { return items.get(i); } @Override public int size() { return items.size(); } } Creating map overlay and one marker: StateListDrawable youIcon = (StateListDrawable)getResources().getDrawable(R.drawable.marker_icon); int width = youIcon.getIntrinsicWidth(); int height = youIcon.getIntrinsicHeight(); youIcon.setBounds(-13, 0-height, -13+width, 0); GeoPoint location = new GeoPoint(40800816,-74122009); MapItemizedOverlay overlay = new MapItemizedOverlay(youIcon); OverlayItem item = new OverlayItem(location, "title", "snippet"); overlay.addOverlay(item); mapView.getOverlays().add(overlay); The R.drawable.marker_icon is defined as follows: <?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:state_focused="true" android:drawable="@drawable/marker_selected" /> <item android:state_selected="true" android:drawable="@drawable/marker_selected" /> <item android:drawable="@drawable/marker_normal" /> </selector> Now, to test the setFocus() behavior I put the button on the activity window, with the following onClick listener: Button focusBtn = (Button)findViewById(R.id.focusbtn); focusBtn.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { for(Overlay ov : mapView.getOverlays()) { if(ov.getClass().getSimpleName().equals("MapItemizedOverlay") == true) { MapItemizedOverlay miv = (MapItemizedOverlay)ov; if(miv.getFocus() == null) miv.setFocus(miv.getItem(0)); else miv.setFocus(null); break; } } mapView.invalidate(); } }); The expected behavior is: clicking on the button toggles marker selection. It works only once - clicking it for the first time selects the marker, clicking it again does not de-select the marker. The most weird thing about it is that after calling setFocus(null), getFocus() also returns null - like the overlay has no focused item (I debugged it). But even after calling mapView.invalidate() the marker is still drawn in 'selected'(focused) state.

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• Facebook Connect: Error when clicking the Facebook Connect button

  - by Garrett

  I am getting this error when I click on the facebook connect button: API Error Code: 100 API Error Description: Invalid parameter Error Message: next is not owned by the application. I am not too sure how to do this, but I've read all the documentation for facebook connect and came up with this: <?php date_default_timezone_set("America/Toronto"); define('FACEBOOK_APP_ID', '##################'); define('FACEBOOK_SECRET', 'XXXXXXXXXXXXXXXXXXXXXXXXXXXXX'); function get_facebook_cookie($app_id, $application_secret) { if(!isset($_COOKIE['fbs_' . $app_id])) return null; $args = array(); parse_str(trim($_COOKIE['fbs_' . $app_id], '\\"'), $args); ksort($args); $payload = ''; foreach ($args as $key => $value) { if ($key != 'sig') { $payload .= $key . '=' . $value; } } if (md5($payload . $application_secret) != $args['sig']) { return null; } return $args; } $cookie = get_facebook_cookie(FACEBOOK_APP_ID, FACEBOOK_SECRET); ?> <html xmlns="http://www.w3.org/1999/xhtml" xmlns:fb="http://www.facebook.com/2008/fbml"> <head> <!-- JQUERY INCLUDE --> <script src="js/jquery-1.4.2.min.js" type="text/javascript"></script> <!-- FACEBOOK CONNECT INCLUDE --> <script src="http://static.ak.connect.facebook.com/js/api_lib/v0.4/FeatureLoader.js.php/en_US" type="text/javascript"></script> <script type="text/javascript"> <!-- $(document).load(function() { }); FB.init("XXXXXXXXXXXXXXXXXXXXXXx ", "xd_receiver.htm"); FB.Event.subscribe('auth.login', function(response) { window.location.reload(); }); function facebook_onlogin() { FB.getLoginStatus(function(response) { if (response.session) { // logged in and connected user, someone you know fb_login.hide(); } else { // no user session available, someone you dont know } }); } // --> </script> </head> <body> <div id="fb_login"> <fb:login-button onlogin="facebook_onlogin();" v="2">Log In with Facebook</fb:login-button> </div> <?php $user = json_decode(file_get_contents( 'https://graph.facebook.com/me?access_token=' . $cookie['access_token']))->id; ?> </body> </html> how on earth can i get this to work? thanks!

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• How to Resolve Jason issue

  - by Mohammad Nezhad

  I am working in a web scheduling application which uses DayPilot component I started by reading the documentation and use the calendar control. but whenever I do some thing which (fires an event on the Daypilot control) I face with following error An exception was thrown in the server-side event handler: System.InvalidCastException: Instance Of JasonData doesn't hold a double at DayPilot.Jason.JasonData.op_Explicit(JasonData data) at DayPilot.Web.Ui.Events.EventMoveEventArgs..ctor(JasonData parameters, string[] fields, JasonData data) at DayPilot.Web.Ui.DayPilotCalendar.ExecuteEventJASON(String ea) at DayPilot.Web.Ui.DayPilotCalendar.System.Web.UI.ICallbackEventHandler.RaiseCallbackEvent(string ea) at System.Web.UI.Page.PrepareCallback(String callbackControlID) here is the completed code in the ASPX page <DayPilot:DayPilotCalendar ID="DayPilotCalendar1" runat="server" Direction="RTL" Days="7" DataStartField="eventstart" DataEndField="eventend" DataTextField="name" DataValueField="id" DataTagFields="State" EventMoveHandling="CallBack" OnEventMove="DayPilotCalendar1_EventMove" EventEditHandling="CallBack" OnEventEdit="DayPilotCalendar1_EventEdit" EventClickHandling="Edit" OnBeforeEventRender="DayPilotCalendar1_BeforeEventRender" EventResizeHandling="CallBack" OnEventResize="DayPilotCalendar1_EventResize" EventDoubleClickHandling="CallBack" OnEventDoubleClick="DayPilotCalendar1_EventDoubleClick" oncommand="DayPilotCalendar1_Command" and here is the complete codebehind protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) Initialization(); } private void dbUpdateEvent(string id, DateTime start, DateTime end) { // update for move using (SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["db"].ConnectionString)) { con.Open(); SqlCommand cmd = new SqlCommand("UPDATE [event] SET [eventstart] = @start, [eventend] = @end WHERE [id] = @id", con); cmd.Parameters.AddWithValue("id", id); cmd.Parameters.AddWithValue("start", start); cmd.Parameters.AddWithValue("end", end); cmd.ExecuteNonQuery(); } } private DataTable dbGetEvents(DateTime start, int days) { // get Data SqlDataAdapter da = new SqlDataAdapter("SELECT [id], [name], [eventstart], [eventend], [state], [other] FROM [event] WHERE NOT (([eventend] <= @start) OR ([eventstart] >= @end))", ConfigurationManager.ConnectionStrings["DayPilotTest"].ConnectionString); ; da.SelectCommand.Parameters.AddWithValue("start", start); da.SelectCommand.Parameters.AddWithValue("end", start.AddDays(days)); DataTable dt = new DataTable(); da.Fill(dt); return dt; } protected void DayPilotCalendar1_EventMove(object sender, DayPilot.Web.Ui.Events.EventMoveEventArgs e) { // Drag and Drop dbUpdateEvent(e.Value, e.NewStart, e.NewEnd); DayPilotCalendar1.DataSource = dbGetEvents(DayPilotCalendar1.StartDate, DayPilotCalendar1.Days); DayPilotCalendar1.DataBind(); DayPilotCalendar1.Update(); } private void Initialization() { // first bind DayPilotCalendar1.StartDate = DayPilot.Utils.Week.FirstDayOfWeek(new DateTime(2009, 1, 1)); DayPilotCalendar1.DataSource = dbGetEvents(DayPilotCalendar1.StartDate, DayPilotCalendar1.Days); DataBind(); } protected void DayPilotCalendar1_BeforeEventRender(object sender, BeforeEventRenderEventArgs e) { // change the color based on state if (e.Tag["State"] == "Fixed") { e.DurationBarColor = "Brown"; } } protected void DayPilotCalendar1_EventResize(object sender, DayPilot.Web.Ui.Events.EventResizeEventArgs e) { dbUpdateEvent(e.Value, e.NewStart, e.NewEnd); DayPilotCalendar1.DataSource = dbGetEvents(DayPilotCalendar1.StartDate, DayPilotCalendar1.Days); DayPilotCalendar1.DataBind(); DayPilotCalendar1.Update(); } protected void DayPilotCalendar1_EventDoubleClick(object sender, EventClickEventArgs e) { dbInsertEvent(e.Text , e.Start, e.End, "New", "New Meeting"); DayPilotCalendar1.DataSource = dbGetEvents(DayPilotCalendar1.StartDate, DayPilotCalendar1.Days); DayPilotCalendar1.DataBind(); DayPilotCalendar1.Update(); } note that I remove unnecessary code behinds

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• rspec undefined local variable or method `class_nesting_depth`

  - by unsorted

  I'm using rails 3 w/ rspec-rails 2.4.1 and I get an error during model generation. Can't find anything from googling. Anyone know what might be going on? TIA $ rails g model CourseRating student_id:integer course_id:integer difficulty:integer usefulness:integer invoke active_record create db/migrate/20110111044035_create_course_ratings.rb create app/models/course_rating.rb invoke rspec create spec/models/course_rating_spec.rb (erb):1:in `template': undefined local variable or method `class_nesting_depth' for #<Rspec::Generators::ModelGenerator:0x0000010424e460> (NameError) from /Users/glurban/.rvm/rubies/ruby-1.9.2-rc2/lib/ruby/1.9.1/erb.rb:753:in `eval' from /Users/glurban/.rvm/rubies/ruby-1.9.2-rc2/lib/ruby/1.9.1/erb.rb:753:in `result' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/actions/file_manipulation.rb:111:in `block in template' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/actions/create_file.rb:54:in `call' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/actions/create_file.rb:54:in `render' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/actions/create_file.rb:63:in `block (2 levels) in invoke!' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/actions/create_file.rb:63:in `open' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/actions/create_file.rb:63:in `block in invoke!' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/actions/empty_directory.rb:114:in `call' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/actions/empty_directory.rb:114:in `invoke_with_conflict_check' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/actions/create_file.rb:61:in `invoke!' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/actions.rb:95:in `action' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/actions/create_file.rb:26:in `create_file' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/actions/file_manipulation.rb:110:in `template' from /Users/glurban/code/recruitd/lib/generators/rspec/model/model_generator.rb:10:in `create_test_file' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/task.rb:22:in `run' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/invocation.rb:118:in `invoke_task' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/invocation.rb:124:in `block in invoke_all' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/invocation.rb:124:in `each' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/invocation.rb:124:in `map' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/invocation.rb:124:in `invoke_all' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/group.rb:226:in `dispatch' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/invocation.rb:109:in `invoke' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/group.rb:269:in `block in _invoke_for_class_method' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/shell.rb:74:in `with_padding' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/group.rb:258:in `_invoke_for_class_method' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/group.rb:150:in `_invoke_from_option_test_framework' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/task.rb:22:in `run' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/invocation.rb:118:in `invoke_task' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/invocation.rb:124:in `block in invoke_all' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/invocation.rb:124:in `each' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/invocation.rb:124:in `map' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/invocation.rb:124:in `invoke_all' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/group.rb:226:in `dispatch' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/invocation.rb:109:in `invoke' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/group.rb:269:in `block in _invoke_for_class_method' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/shell.rb:74:in `with_padding' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/group.rb:258:in `_invoke_for_class_method' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/group.rb:150:in `_invoke_from_option_orm' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/task.rb:22:in `run' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/invocation.rb:118:in `invoke_task' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/invocation.rb:124:in `block in invoke_all' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/invocation.rb:124:in `each' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/invocation.rb:124:in `map' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/invocation.rb:124:in `invoke_all' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/group.rb:226:in `dispatch' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/thor-0.14.6/lib/thor/base.rb:389:in `start' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/railties-3.0.0/lib/rails/generators.rb:163:in `invoke' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/railties-3.0.0/lib/rails/commands/generate.rb:10:in `<top (required)>' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:239:in `require' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:239:in `block in require' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:225:in `block in load_dependency' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:591:in `new_constants_in' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:225:in `load_dependency' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:239:in `require' from /Users/glurban/.rvm/gems/ruby-1.9.2-rc2/gems/railties-3.0.0/lib/rails/commands.rb:17:in `<top (required)>' from script/rails:6:in `require' from script/rails:6:in `<main>'

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• How can I get an Android TableLayout to fill the screen?

  - by Timmmm

  Hi, I'm battling with Android's retarded layout system. I'm trying to get a table to fill the screen (simple right?) but it's ridiculously hard. I got it to work somehow in XML like this: <?xml version="1.0" encoding="utf-8"?> <TableLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_height="fill_parent" android:layout_width="fill_parent"> <TableRow android:layout_height="fill_parent" android:layout_width="fill_parent" android:layout_weight="1"> <Button android:text="A" android:layout_width="wrap_content" android:layout_height="fill_parent" android:layout_weight="1"/> <Button android:text="B" android:layout_width="wrap_content" android:layout_height="fill_parent" android:layout_weight="1"/> </TableRow> <TableRow android:layout_height="fill_parent" android:layout_width="fill_parent" android:layout_weight="1"> <Button android:text="C" android:layout_width="wrap_content" android:layout_height="fill_parent" android:layout_weight="1"/> <Button android:text="D" android:layout_width="wrap_content" android:layout_height="fill_parent" android:layout_weight="1"/> </TableRow> However I can not get it to work in Java. I've tried a million combinations of the LayoutParams, but nothing ever works. This is the best result I have which only fills the width of the screen, not the height: table = new TableLayout(this); // Java. You suck. TableLayout.LayoutParams lp = new TableLayout.LayoutParams( ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.FILL_PARENT); table.setLayoutParams(lp); // This line has no effect! WHYYYY?! table.setStretchAllColumns(true); for (int r = 0; r < 2; ++r) { TableRow row = new TableRow(this); for (int c = 0; c < 2; ++c) { Button btn = new Button(this); btn.setText("A"); row.addView(btn); } table.addView(row); } Obviously the Android documentation is no help. Anyone have any ideas?

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• Eventlet or gevent or Stackless + Twisted, Pylons, Django and SQL Alchemy

  - by Khorkrak

  We're using Twisted extensively for apps requiring a great deal of asynchronous io. There are some cases where stuff is cpu bound instead and for that we spawn a pool of processes to do the work and have a system for managing these across multiple servers as well - all done in Twisted. Works great. The problem is that it's hard to bring new team members up to speed. Writing asynchronous code in Twisted requires a near vertical learning curve. It's as if humans just don't think that way naturally. We're considering a mixed approach perhaps. Maybe do the xmlrpc server part and process management in Twisted still but the other stuff in code that at least looks synchronous while not being as such. Then again I like explicit over implicit so hmmm. Anyway onto greenlets - how well does that stuff work? So there's Stackless and as you can see from my Gallentean avatar I'm well aware of the tremendous success in it's use for CCP's flagship EVE Online game first hand. What about Eventlet or gevent? Well for now only Eventlet works with Twisted. However gevent claims to be faster since it's not a pure python implementation it instead uses libevent. It also has fewer idiosyncrasies and defects supposedly. The documentation there is minimal in comparison to Eventlet and it's maintained by 1 guy as far as I can tell. This makes me leery but all great projects start this way so... Then there's PyPy - I haven't even finished reading about that one yet - just saw it in this thread: Drawbacks of Stackless. So confusing - I'm wondering what the heck to do - sounds like Eventlet is probably the best bet but is it really stable enough? Anyone out there have any experience with it? Should we go with Stackless instead as it's been around and is proven technology - just like Twisted is as well - and they do work together nicely. But still I hate having to have a separate version of Python to do this. what to do.... This somewhat obnoxious blog entry hit the nail on the head for me though: Asynchronous IO for Grownups We're stuck using MySQL as well - I never knew how great PostgreSQL was until having had to work on a production OLTP system in MySQL instead - but that's another story. But if that monkey patch thing really works then wow. Just wow.

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• How to use Bouncy Castle lightweight API with AES and PBE

  - by Adrian

  I have a block of ciphertext that was created using the JCE algorithim "PBEWithSHA256And256BitAES-CBC-BC". The provider is BouncyCastle. What I'd like to do it decrypt this ciphertext using the BouncyCastle lightweight API. I don't want to use JCE because that requires installing the Unlimited Strength Jurisdiction Policy Files. Documentation seems to be thin on the ground when it comes to using BC with PBE and AES. Here's what I have so far. The decryption code runs without exception but returns rubbish. The encryption code, String password = "qwerty"; String plainText = "hello world"; byte[] salt = generateSalt(); byte[] cipherText = encrypt(plainText, password.toCharArray(), salt); private static byte[] generateSalt() throws NoSuchAlgorithmException { byte salt[] = new byte[8]; SecureRandom saltGen = SecureRandom.getInstance("SHA1PRNG"); saltGen.nextBytes(salt); return salt; } private static byte[] encrypt(String plainText, char[] password, byte[] salt) throws NoSuchAlgorithmException, InvalidKeySpecException, NoSuchPaddingException, InvalidKeyException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException { Security.addProvider(new BouncyCastleProvider()); PBEParameterSpec pbeParamSpec = new PBEParameterSpec(salt, 20); PBEKeySpec pbeKeySpec = new PBEKeySpec(password); SecretKeyFactory keyFac = SecretKeyFactory.getInstance("PBEWithSHA256And256BitAES-CBC-BC"); SecretKey pbeKey = keyFac.generateSecret(pbeKeySpec); Cipher encryptionCipher = Cipher.getInstance("PBEWithSHA256And256BitAES-CBC-BC"); encryptionCipher.init(Cipher.ENCRYPT_MODE, pbeKey, pbeParamSpec); return encryptionCipher.doFinal(plainText.getBytes()); } The decryption code, byte[] decryptedText = decrypt(cipherText, password.getBytes(), salt); private static byte[] decrypt(byte[] cipherText, byte[] password, byte[] salt) throws DataLengthException, IllegalStateException, InvalidCipherTextException, InvalidKeyException, NoSuchAlgorithmException, NoSuchPaddingException, IllegalBlockSizeException, BadPaddingException { BlockCipher engine = new AESEngine(); CBCBlockCipher cipher = new CBCBlockCipher(engine); PKCS5S1ParametersGenerator keyGenerator = new PKCS5S1ParametersGenerator(new SHA256Digest()); keyGenerator.init(password, salt, 20); CipherParameters keyParams = keyGenerator.generateDerivedParameters(256); cipher.init(false, keyParams); byte[] decryptedBytes = new byte[cipherText.length]; int numBytesCopied = cipher.processBlock(cipherText, 0, decryptedBytes, 0); return decryptedBytes; }

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• 'NoneType' object has no attribute 'get' error using SQLAlchemy

  - by Az

  I've been trying to map an object to a database using SQLAlchemy but have run into a snag. Version info if handy: [OS: Mac OSX 10.5.8 | Python: 2.6.4 | SQLAlchemy: 0.5.8] The class I'm going to map: class Student(object): def __init__(self, name, id): self.id = id self.name = name self.preferences = collections.defaultdict(set) self.allocated_project = None self.allocated_rank = 0 def __repr__(self): return str(self) def __str__(self): return "%s %s" %(self.id, self.name) Background: Now, I've got a function that reads in the necessary information from a text database into these objects. The function more or less works and I can easily access the information from the objects. Before the SQLAlchemy code runs, the function will read in the necessary info and store it into the Class. There is a dictionary called students which stores this as such: students = {} students[id] = Student(<all the info from the various "reader" functions>) Afterwards, there is an "allocation" algorithm that will allocate projects to student. It does that well enough. The allocated_project remains as None if a student is unsuccessful in getting a project. SQLAlchemy bit: So after all this happens, I'd like to map my object to a database table. Using the documentation, I've used the following code to only map certain bits. I also begin to create a Session. from sqlalchemy import * from sqlalchemy.orm import * engine = create_engine('sqlite:///:memory:', echo=False) metadata = MetaData() students_table = Table('studs', metadata, Column('id', Integer, primary_key=True), Column('name', String) ) metadata.create_all(engine) mapper(Student, students_table) Session = sessionmaker(bind=engine) sesh = Session() Now after that, I was curious to see if I could print out all the students from my students dictionary. for student in students.itervalues(): print student What do I get but an error: Traceback (most recent call last): File "~/FYP_Tests/FYP_Tests.py", line 140, in <module> print student File "/~FYP_Tests/Parties.py", line 30, in __str__ return "%s %s" %(self.id, self.name) File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/SQLAlchemy-0.5.8-py2.6.egg/sqlalchemy/orm/attributes.py", line 158, in __get__ return self.impl.get(instance_state(instance), instance_dict(instance)) AttributeError: 'NoneType' object has no attribute 'get' I'm at a loss as to how to resolve this issue, if it is an issue. If more information is required, please ask and I will provide it.

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• What is in your Mathematica tool bag?

  - by Timo

  We all know that Mathematica is great, but it also often lacks critical functionality. What kind of external packages / tools / resources do you use with Mathematica? I'll edit (and invite anyone else to do so too) this main post to include resources which are focused on general applicability in scientific research and which as many people as possible will find useful. Feel free to contribute anything, even small code snippets (as I did below for a timing routine). Also, undocumented and useful features in Mathematica 7 and beyond you found yourself, or dug up from some paper/site are most welcome. Please include a short description or comment on why something is great or what utility it provides. If you link to books on Amazon with affiliate links please mention it, e.g., by putting your name after the link. Packages: LevelScheme is a package that greatly expands Mathematica's capability to produce good looking plots. I use it if not for anything else then for the much, much improved control over frame/axes ticks. David Park's Presentation Package ($50 - no charge for updates) Tools: MASH is Daniel Reeves's excellent perl script essentially providing scripting support for Mathematica 7. (This is finally built in as of Mathematica 8 with the -script option.) Resources: Wolfram's own repository MathSource has a lot of useful if narrow notebooks for various applications. Also check out the other sections such as Current Documentation, Courseware for lectures, and Demos for, well, demos. Books: Mathematica programming: an advanced introduction by Leonid Shifrin (web, pdf) is a must read if you want to do anything more than For loops in Mathematica. Quantum Methods with Mathematica by James F. Feagin (amazon) The Mathematica Book by Stephen Wolfram (amazon) (web) Schaum's Outline (amazon) Mathematica in Action by Stan Wagon (amazon) - 600 pages of neat examples and goes up to Mathematica version 7. Visualization techniques are especially good, you can see some of them on the author's Demonstrations Page. Mathematica Programming Fundamentals by Richard Gaylord (pdf) - A good concise introduction to most of what you need to know about Mathematica programming. Undocumented (or scarcely documented) Features: How to customize Mathematica keyboard shortcuts. See this question. How to inspect patterns and functions used by Mathematica's own functions. See this answer How to achieve Consistent size for GraphPlots in Mathematica? See this question.

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