Enterprise Integration for Beginners

WSO2 Carbon based products are released with a well defined strategy for applying fixes to the system. If any customer faces an issue in the server, patches will be provided until that issue is fixed in the next product release. Once the patches are applied in to the server, it will fix that respective issue. In the practical world, there can be situations where users might want to revert the patches and restore the system into original status in terms of Carbon product. This blog post will describe the correct way to revert a patch applied in to a Carbon server. How to apply a patch? (i)  Shutdown the server, if you have already started. (ii) Copy the wso2carbon-version.txt file to <CARBON_SERVER>/bin. (iii) Copy the patchXXXX folder to  <CARBON_SERVER>/repository/components/patches/ (iv) Restart the server with :        Linux/Unix :  sh wso2server.sh -DapplyPatches        Windows    :  wso2se...

This blog post describes the steps you can follow in a situation where you have saved all your configurations in the embedded registry of your WSO2 Carbon server and suddenly the server is not starting due to some changes in the back end services and that changes has a direct impact on your configuration. Let's say WSO2 ESB server is not starting due to some changes in the security policies which has applied in the WSDL files you are using in your proxy configurations. In this kind of a scenario, that particular proxy service will not be able start when the server starts. In the latest ESBs (WSO2 ESB 4.5.X onwards) server will start in failSafe mode by ignoring the failure of artifacts. But in older versions (ESB 1.x.x to 3.x.x) this feature is not available and the server will not start. In this kind of scenario, you can't change your proxy configurations since you have saved them in the internal registry (which will save those data in internal H2 database). Here is the...

The WSO2 Data Services Server augments Service Oriented Architecture (SOA) development efforts by providing an easy to use platform for integrating data stores, creating composite data views, and hosting data services. This blog post is written to help users to getting started with WSO2 DSS with writing a data service to execute a stored procedure which is defined in a database. Prerequisites Before starting the implementation, you need the following things to be downloaded and installed. 1. Download WSO2 Data Services Server and install. 2. Download mysql server and install. Once you have installed both WSO2 DSS and mysql in your enviornment, you can proceed to the next step. Creating the stored procedure in mysql 1. Connect to mysql server with the following command. mysql -u root -p Enter password: 2. Create a sample databasae. DROP DATABASE IF EXISTS ESB_SP_SAMPLE; CREATE DATABASE ESB_SP_SAMPLE; 3. Create a table using the following statement. USE ...

Business Requirement Today, your business is all about working with information. If you are a business owner and if you need to grow your business, best way is to make it accessible over the internet. When your business grows, it can be thousands, millions or even billions of people interacting with your business every second. If you think about online stores like ebay, amazon or google play, they need to process millions of messages per second. When a customer interact with such a system, that information need to saved in somewhere (ex:database). This can be illustrated as below. In the above figure, Client interacting with a web browser and access your system which is implemented as a web service which is hosted somewhere in the internet. At a given moment, there can be any number of parallel users accessing your business. To handle each and every request from the customers, you need to have a robust, reliable messaging system. How WSO2 can serve your requirement? WSO2 ...