By John G. Webster (Editor)
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Demystify the quandaries of internet improvement utilizing Play Framework
try and debug your apps by utilizing Play's in-built checking out framework
grasp the middle positive aspects of Scala via a accomplished assurance of code and examples for various scenarios
Who This booklet Is For
This ebook is meant for these builders who're prepared to grasp the inner workings of Play Framework to successfully construct and set up web-related apps.
What you are going to Learn
customise your framework to house the categorical standards of an program
boost responsive, trustworthy, and hugely scalable functions utilizing Play Framework
construct and customise Play Framework plugins that may be utilized in a number of Play functions
make yourself familiar with third-party APIs to prevent rewriting current code
achieve an perception into some of the points of trying out and debugging in Play to effectively attempt your apps
Get to understand all in regards to the innovations of WebSockets and Actors to method messages in response to events
Play Framework is an open resource internet software framework that's written in Java and Scala. It follows the Model-View-Controller architectural trend and permits the consumer to hire Scala for program improvement, whereas protecting key homes and lines of Play Framework intact.
Starting off through construction a uncomplicated program with minimum positive aspects, you get a close perception into dealing with facts transactions and designing types in Play. subsequent, you enterprise into the recommendations of Actors and WebSockets, the method of manipulating information streams, and trying out and debugging an program in Play. ultimately, you achieve an perception into extending the framework via writing customized modules or plugins in Play. each one bankruptcy has a troubleshooting part that is helping you out via discussing the reasons of, and strategies to, a few generally confronted concerns.
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Additional info for 38.Networking
Also, most NFS RPC requests are idempotent, meaning that an NFS client may send the same request one or more times without any harmful side effects. The net result of these duplicate requests is the same. NFS RPC requests are transported using the unreliable User Datagram Protocol (UDP). NFS servers notify clients when an RPC completes by sending the client an acknowledgment (also using UDP). , MS-DOS) Disk Figure 8. The NFS structure. See text for description. A NFS client sends its RPC requests to a NFS server one at a time.
Single Delivery. Single delivery semantics require that only one of the current group members needs to receive the message for the group communication to be successful. k-Delivery. In k-delivery semantics, at least k members of the current group will receive the message successfully. Quorum Delivery. With quorum delivery semantics, a majority of the current group members will receive the message successfully. Atomic Delivery. With atomic delivery all current members of the group successfully receive the message or none does.
The parameters are unpacked from the received message and a procedure is called in a conventional manner. Thus, the parameters and return address are on the stack, and the server does not see that the original call was made on a remote client computer. The server executes the procedure call and returns the results to the virtual caller: that is, the server stub. The stub packs them into a message and issues send to return the results. The stub comes back to the beginning of its loop to issue the receive primitive, and blocks waiting for the next request message.
38.Networking by John G. Webster (Editor)