messaging | 易学教程

Caliburn.Micro. Automatically call eventaggregator.Subscribe() for IHandle implementors with Autofac

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问题 In Caliburn.Micro documentation the authors mention such possibility: documentation link IHandle inherits from a marker interface IHandle. This allows the use of casting to determine if an object instance subscribes to any events. This enables simple auto-subscribing if you integrate with an IoC container. Most IoC containers (including the SimpleContainer) provide a hook for being called when a new instance is created. Simply wire for your container’s callback, inspect the instance being

Java Messaging : Difference between ActiveMQ, Mule, ServiceMix and Camel

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I am new to Messaging and want to know the difference between ActiveMQ , Mule , ServiceMix and Camel Anyone knows how each of these product is different? Thanks in advance ! EDIT: Also would like to know any good place/resource to learn these things. duffymo ActiveMQ is a message broker which implements the JMS API and supports a number of cross language clients and network protocols . It lets you implement queues or topics and write listeners or subscribers to respond to queue events. Mule and ServiceMix are open source ESB (enterprise service bus). An ESB has capabilities beyond JMS: queuing

Creating a threaded private messaging system like facebook and gmail

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I am creating a threaded message system much like gmail and facebook where the inbox lists the most recent threads displaying the subject, the sender's name, and time-stamp of the most recent message. Here's How my tables are set up: users: user_id user_name thread: thread_id title to_id to_keep to_read from_id from_keep date message: message_id thread_id to_id from_id message_text date What I'm doing right now is when a user creates a new message, it creates a new thread in the thread table and then a new message in the message table and if a user responds to a thread, it duplicates the

RabbitMQ Java Client Using DefaultConsumer vs QueueingConsumer

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问题 DefaultConsumer My DemoConsumer inherits from DefaultConsumer. I have noticed that working this way handleDelivery() is invoked from ThreadPool. (printing Thread.currentThread().getName() I see pool-1-thread-1/2/3/4 eachtime. I have also tested it several times and saw that the order is saved. Just to make sure - since different threads call handle delivery - will it mess my order? QueueingConsumer All of the java tutorial use QueueingConsumer to consume messages. In the API Docs it is

How to use Yahoo IM messaging api? (unable_to_determine_oauth_type)

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Recently, I have just created a yahoo application by following the online [yahoo oauth 2.0 guide for developer,][2] I can get the OAuth 2.0 credential but meet "unable_to_determine_oauth_type" oauth problem while calling yahoo IM related [API][3]. Why? Here is my steps: curl -v https://api.login.yahoo.com/oauth2/request_auth -d 'client_id=[CLIENT-ID]&redirect_uri=oob&response_type=code&language=en-us' it then redirects me to https//login.yahoo.com/oa?.src=oauth2&.partner=&.pd=c%3DmZmAFpe.2e7WuWzcHD2ZPYQ-%26ockey

How do I force an iOS app to use 3G instead of WiFi?

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问题 I want to use a messaging protocol that works fine over 3G, but not over some corporate firewalls. How can my app force the use of the cellular network when it fails to connect over WiFi even in the case that the WiFi network is reachable? EDIT: After reading through the implementation of the Reachability class I remain unsure whether the two are indeed mutually exclusive. It could well be possible to discover both interfaces via gethostbyname() , which I might try just to see what comes out.

about sending messages among bg.html, popup.html and contentscript.js

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问题 In my extension, when a button named mybuttonl in popup.html is clicked, it sends a message "getvar" to contentscript.js , which in turn sends a message "I want var1" to background.html to get an object named var1 . (A button named mybutton2 is set up likewise, except it gets the var2 object when clicked). How should I implement this? What's more, I am a little confused about the chrome.extension.onRequest.addListener and chrome.extension.sendRequest methods. Could someone please explain? 回答1

erlang message passing architecture

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In erlang if two processes A and B are sending message to a process C simultaneously. Will there be a race condition? C ! { very large message } sent by A C ! { very large message } sent by B Will C receive the complete message from A and then proceed for the message from B? or is it that C is likely be going to receive chunks of A's message along with chunks of B's message? Message receiving is an atomic operation. If you are interested how it is done, read the source code of VM. If I simplify it, the sending process is doing those steps: Allocate a target memory space in the sending process

Alternative to Application.DoEvents()

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问题 I am developing a messaging system based on webBrowser controls so that I can format the text however I please. When the user is offline and is sent messages, the messages are stored and an event is sent for every message when they log back in. When I set the default html and such for the website, I normally use: while (this.webBrowser1.ReadyState != WebBrowserReadyState.Complete) Application.DoEvents(); This works when the program is running normally. When the user is receiving message sent

Google cloud messaging Limit

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I know that exists similar questions on site, but I confused because http and xmpp have difference limit: this page say differences between http and xmpp . first limit is [ xmpp & http ]: up to 4KB of data second limit is: http : You can send out a message to 1000 users at a time. ( ref ) xmpp : For each sender ID, GCM allows 1000 connections in parallel. ( ref ) You can send out a message to 1000 users at a time. so if you have more users you'll have to send the message multiple times from your server but to different users each time ( ref ) third limit is: http : I couldn't found this limit