Music Browser. Web Services  SOAP and WSDL  Simple Object Access Protocol  Web Services Description Language  To use SOAP  Generate stub classes.

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Presentation transcript:

Music Browser

Web Services  SOAP and WSDL  Simple Object Access Protocol  Web Services Description Language  To use SOAP  Generate stub classes from the WSDL document  Call methods from the stubs to invoke methods of web service  (Remote Procedure Invocation) 

Web Services  REST (Representation State Transfer)  Request information by constructing special URLs  Receive information in XML format  Parse XML  

Main Application (MIDlet) AlbumTrackArtist FetchXMLFetchImage DefaultHandler ArtistHandler AlbumHandler TrackHandler Thread LoadArtistsLoadAlbum Thread LoadTracks

Main Points  Keep in mind the user and user interface  Check the response codes after making a connection  Reconnect on failure  Follow redirect URL hc.getResponseCode() == HttpConnection.HTTP_MOVED_PERM hc.getHeaderField("Location“)

Main Application (MIDlet) AlbumTrackArtist FetchXMLFetchImage DefaultHandler ArtistHandler AlbumHandler TrackHandler Thread LoadArtistsLoadAlbum Thread LoadTracks