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JBoss Fuse - Parsing CSV file playing with Websocket in Camel Part two

Continue on from the last post, as in a vegetable wholesalers warehouse, when ever a truck comes in with loads of goods, when the driver signs the goods over, a cvs file contains the product information will be feed into our system via wireless transmission. And then the content of the file needs to go to 2 places simultaneously, first display the content on the monitor for the bider to see instantly, also it needs to store the content inside the system. 

We used the Bindy data format converter component in camel to convert CSV into POJO from the previous post.So now to display the content, we are going to continuously print out the arrived goods data to all the connected devices, such as the big monitor in the warehouse or distributor's hand-held device. For this we are going to publish the content to all client(html5 web page) that are connect to our websocket, and store the content into a constant POJO at the same time. 

The WebSocket endpoint is pretty simple and straight forward, I bit you will never go back to EE once you see how much easier with Camel. 

Here you see I have setup a websocket ws://localhost:9292/echo and try to send to all clients.  Did you see how simple that was? You have a option of sending the message to a single client or all, these 2 parameters can be set either in the header or in the parameter.
Sends the message to all clients which are currently connected. You can use the sendToAll option on the endpoint instead of using this header.
Sends the message to the client with the given connection key.

So make sure you set the right one, and I am not going into the details of a HTML client, I simply grab the available example online, all you need to do is change where your WebSocket destination. The script simply just connects to the WebSocket and start listening to the port and display the content when ever it receives messages from server. 
      var wsUri = "ws://localhost:9292/demo"; 

function onOpen(evt) { 

function onMessage(evt) { 
  writeToScreen('' +'');

window.addEventListener("load", init, false);

By using the Wire Tap enterprise integration pattern in Camel, it "allows you to route messages to a separate location while they are being forwarded to the ultimate destination". We can then send the data both to the websocket endpoint and the data store simultaneously. 

On the other side of the wire tap, we redirect it to another route, which then starts up a  Java bean, sums up the quantity of goods and log for demo purpose. 

The Java process bean is very simple. 

package org.blogdemo.websocketbindydemo;

import java.util.HashMap;

public class ProductProcessBean {
 private HashMap productSum = new HashMap();
 public String addProduct(Product product){
  Integer sum=0;
  if(productSum.get(product.getProductId()) != null){
   sum = productSum.get(product.getProductId())+product.getQuantity();
   sum = product.getQuantity();
  productSum.put(product.getProductId(), sum);
  return "Added Product "+product.getProductName()+", now the total shipped quantities are :"+sum;


Deploy the application using fabric8's maven plugin.


Now, we are ready to deploy content into the application. 

1. Start up and setup Fuse, create Fuse Fabric

2. Create a container and add the profile

3. Go to the container view, sending CSV file to the endpoint.

You can find the result published to the web page.

And log

Here is the step by step video. 

You can find the code inside JBoss Demo Central.


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先來看一下 DataSource Subsystem, DataSource 的部分主要是針對Connection Pool 做調校。

通常,程式都會需要跟資料庫界接,電腦在本機,尤其是在記憶體的運算很快,但是一旦要外部的資源連接,就是會非常的耗資源。所以現在的應用程式伺服器都會有個Pool 放一些先連接好的 資料庫connection,當程式有需要的時候就可以馬上提供,而不用花那些多餘的資源去連接資料庫。

這就是為什麼要針對Connection Pool 去做調校。

以下會討論到的參數,都是跟效能比較有關係,Datasource 還有很多參數,像是檢核connection 是否正確的,我都不會提到。如果你追求的是非常快速的效能,那我建議你一個檢核都不要加。當然,這樣就會為伺服器上面執行的程式帶來風險。這就是你要在效能與正確,安全性上面的取捨了。 (套句我朋友說的話,不可能又要馬兒好,又要馬兒不吃草的..)

最重要的調校參數就是 Connection 的 Pool 數量。(也就是那個Pool 裡面要放幾條的connection.) 這個參數是每一個應用程式都不一樣的。


Connection Pool 最少會存留的connection 數量


Connection Pool 最多可以開啓的 connection 數量


事先將connection pool 裡面建立好min-pool-size 的connection.

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