synchronous

I am trying to understand the basic example provided on the introduction page of tornado documentation. It has 2 blocks of code. The Synchronous one is fine for me, and I do understand it. But the asynchronous one is one I am not able to understand. Synchronous from tornado.httpclient import HTTPClient def synchronous_fetch(url): http_client = HTTPClient() response = http_client.fetch(url) return response.body Asynchronous from tornado.httpclient import AsyncHTTPClient def asynchronous_fetch(url, callback): http_client = AsyncHTTPClient() def handle_response(response): callback(response.body)

Besides the asynchronous/synchronous nature of a particular problem and taking into account that MOMs (in this case having chosen JMS) offer additional features for free like load balancing and others, what else can one consider when choosing JMS rather than REST or vice-versa? Thanks Tom Howard Always use REST. It is the most modern, advanced and scalable integration approach available today. Load balancing a REST based service is achieved simply with hardware or software HTTP load balancer and can be considered just as free as load balancing in JMS. MOM (Message Oriented Middleware) doesn't

I have a form with an input of type field. I have several radiobuttons, and depending on which of them I click, the value in the input type field will be updated. After that, I will call a Javascript function to perform certain action, and the function will use the updated quantity (text) in the input field. Of course, it is more secure to pass that quantity to the function itself, but could I rely on Javascript first updating the DOM, displaying the update input field value, and with that, retrieving it via document.getElementById("input-quantity").value and using this in the function? Or

We are making multiple ajax requests to "save" data in a web app, then reload the page. We have run into a situation where (since requests are made asynchronously) the page is reloaded while or before the ajax calls are completed. The simple solution to this was to make the ajax calls with the "async": false option on, forcing synchronous calls. This seems to work, however dialog box code that runs BEFORE any calls are executed delay in running. Any advice is greatly appreciated! Also it should be noted that putting an alert() before the reload ALLOWS the ajax requests to be made. (The alert

New to ajax, so asking a very basic question. -- Is there no way to make a Synchronous ajax call (async:false) with timeout set on it.? http://www.ajaxtoolbox.com/request/ Timeout works perfect with Asynchronous call though in my application, but for one particular scenario, I need a Synchronous call (the javascript should actually wait untill it hears back from the server), and this also works fine. But I need to handle a scenario where the sever could take long and a ajax timeout may be called. Is there any other piece of standard documentation for ajax I could refer to? Thanks Basically,

I like to avoid resetting data registers that don't need to be reset. For example, when streaming data through pipeline stages, if each stage has a valid bit, there is no need to reset the data registers. (I believe this eases routing and timing on the data registers.) This can easily be accomplished by using separate always blocks (or processes in vhdl), but I find this verbose, and doing the following is problematic because the data register is essentially being enabled by the reset. always @(posedge clk) if (rst) out_valid <= 0; // NOTE: out_data is not reset else begin out_valid <= in

I'm using ajax with jQuery on my site and need to show a progress / loading indicator. My dilemna is this: Synchronous AJAX locks the browser, so I cant do anything (e.g. show a loading indicator) till the contents are returned, by which time it is too late I am using JSON as the return data type and setting async = true returns an empty response string my whole framework relies on the return type being JSON-formatted I cannot seem to find any way to get JS to give the user an indication that something is in progress, except for doing an alert(). (For some reason an alert does work). Any

I'm writing a program in Node.js that (in some situations) wants to act as a simple filter: read everything from stdin (up to end of file), do some processing, write the result to stdout. How do you do the 'read everything from stdin' part? The closest solutions I've found so far, seem to work either for one line at a time from the console, or else only work when stdin is a file not a pipe. My boiler-plate for this one is a lot like the solution described in a comment above -- offering it at the top level because it's very much the simplest way to do this and it shouldn't be only in a comment.

I am creating a server which consumes commands from numerous sources such as JMS, SNMP, HTTP etc. These are all asynchronous and are working fine. The server maintains a single connection to a single item of legacy hardware which has a request/reply architecture with a custom TCP protocol. Ideally I would like a single command like this blocking type method public Response issueCommandToLegacyHardware(Command command) or this asynchronous type method public Future<Response> issueCommandToLegacyHardware(Command command) I am relatively new to Netty and asynchronous programming, basically