Release web application
Once you have installed JOTM and Tomcat, publish and call web applications are very simple. First, download the bank.tgz file and decompressed. Copy Bank.xml and Bank.war to $ Tomcat Install Directory $ / WebApps Directory, then start Tomcat:
> CD $ CATALINA_HOME / BIN
> ./catalina.shrun
Using catalina_base: / home / jmesnil / lib / tomcat
Using catalina_home: / home / jmesnil / lib / Tomcat
Using catalina_tmpdir: / home / jmesnil / lib / tomcat / temp
USING JAVA_HOME: / USR / local / Java
May 6, 2003
5:56:00 pm org.apache.commons.Modeler.Registry LoadRegistry
INFO: Loading Registry Information
May 6, 2003
5:56:00 pm org.apache.commons.Modeler.Registry GetRegistry
Info: CREANG New Registry Instance
May 6, 2003
5:56:00 pm org.apache.commons.Modeler.Registry Get Server
Info: CREANG MBEANSERVER
May 6, 2003
5:56:07 pm org.apache.coyote.http11.http11protocol init
Info: Initializing Coyote HTTP / 1.1 on Port 8080
Starting Service Tomcat-Standalone
Apache Tomcat /
4.1.24
-LE-JDK14
You can notice that JOTM does not start from the log, only when you first access DataSource, it will start, then you will get the following information:
May 6, 2003
5:56:20 Pm Org.ObjectWeb.Jotm.Jotm
INFO: JOTM Started with a local transaction factory trata is not bound.
May 6, 2003
5:56:20 Pm Org.ObjectWeb.Jotm.Jotm
Info: Carol Initialization
Open the browser to point to http: // localhost: 8080 / bank / to use web applications.
Use web applications
The homepage of this web application consists of two links:
1) Go to the cash extraction page, where you can simulate the extraction of cash from ATM;
2) To the management console page, where you can check or update information related to the Bank account you created by you.
Before the operation, 500 yuan in the ATM, John Doe's bank account has 100 yuan, and Jane Doe's bank account has 600 yuan.
If John Doe wants to support 400 yuan, the transaction will fail because there is not enough money on his bank account. The result is like this:
Client ID: John_Doe, Value: $ 400
Cash can not be delivered to you
Because: NOT ENOUGH MONEY IN YOUR ACCOUNT (ONLY $ 100).
If Jane Doe wants to support 550 yuan, the transaction will fail because there is not enough cash in the ATM machine. The result is like this: Client ID: Jane_doe, Value: $ 550
Cash can not be delivered to you
Because: Not Enough Cash Available from this ATM (ONLY
$ 500).
If John Doe wants to take 50 yuan, the transaction will be completed successfully. The results are as follows:
Client ID: John_doe, Value: $ 50
Please take your cash ($ 50)
Thank you!
to sum up
This simple example demonstrates servlets to achieve strongness and simplicity by using transactions.
what
Correct operation in the case. The combination of Tomcat and Jotm provides a lightweight approach to a lightweight approach to getting superiority.
In addition to the functions in the example, JOTM also provides more features. JOTM provides the following features to help you enhance your web application:
Complete Distributed Transaction Support: If your application is running (data, business, representation layer) running in different JVMs, you can use global transactions across multiple JVMs. The content of the transaction can be propagated via RMI / JRMP or RMI / IIOP.
Integration with JDBC: Use Xapool, an XA-compatible JDBC connection pool, interact with the database. Xapool is very similar to Jakarta's DBCP project, adding XA compatibility above, which is a must-have method for integrating JTA transactions with JDBC.
Integration with JMS: JOTM can be integrated with Jorm, JORM is an JMS service implementation developed by ObjectWeb organization, through integrated JMS messages supported by integration. You can update JMS messages and database updates to the same transaction.
Web Service Transactions: JOTM provides BTP (Business Transaction Protocol), JOTM-BTP, you can add transaction behavior for your Web Service.
Documents and examples of the above functions can be
Jotm
The release version is found on its website.
