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Java Forum / General / April 2007how to achieve groupcommunication
hi folks, i am riting a software in which all the systems in a lan can form teams n work in teams.my problem is how to achieve broadcasting ... when a new user comes by simple pressing of a button should announce his/her presence..n i am using ipaddress to manage groups In group communication how to prevent forming cycles.of messages i.e a messages appeared to a person shudn't be.. appeared to tht person again..this is my problem..may b using file as a database..? thanks in advance ... i need solution of this immediately....plz vijay schrieb: > i need solution of this immediately....plz You don't think formulation is a little bit inappropriate asking volunteers to help you in there spare time? Kai > hi folks, > i am riting a software in which all the systems in a lan can form > teams n work in teams.my problem is how to achieve broadcasting ... UDP broadcast to LAN's broadcast address using one of the port numbers reserved for private use. See relevant RFCs. > when a new user comes by simple pressing of a button should announce > his/her presence..n i am using ipaddress to manage groups The app can send a broadcast request to the fixed private port. All other instances of the app listen to that port and respond as needed. > In group communication how to prevent forming cycles.of messages By not relaying messages. > i.e a messages appeared to a person shudn't be.. Authentication and authorisation are different from "cycle of messages". Maybe you should elaborate. > appeared to tht person again.. Don't send it again. Alternatively receivers could log sender's IP and serial number of message and ignore repetitions. > this is my problem.. Indeed. > may b using file as a database..? I can't see what persistent storage has to do with the rest of your question. > i need solution of this immediately....plz I'd hire a paid consultant immediately. vijay wrote : > may b "may b" instead of "maybe" Same number of characters even sigh...  SignatureWojtek :-) Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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