pdf417 java open source Supports in Java

Making PDF417 in Java Supports

Supports
PDF 417 Generation In Java
Using Barcode generator for Java Control to generate, create PDF-417 2d barcode image in Java applications.
www.OnBarcode.com
PDF417 Decoder In Java
Using Barcode scanner for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
Required
GS1 128 Encoder In Java
Using Barcode generation for Java Control to generate, create GTIN - 128 image in Java applications.
www.OnBarcode.com
QR Maker In Java
Using Barcode encoder for Java Control to generate, create QR Code ISO/IEC18004 image in Java applications.
www.OnBarcode.com
RequiresNew
Printing Code 39 Full ASCII In Java
Using Barcode drawer for Java Control to generate, create Code 3/9 image in Java applications.
www.OnBarcode.com
UPC A Creator In Java
Using Barcode printer for Java Control to generate, create GTIN - 12 image in Java applications.
www.OnBarcode.com
Mandatory
Data Matrix ECC200 Encoder In Java
Using Barcode maker for Java Control to generate, create ECC200 image in Java applications.
www.OnBarcode.com
Planet Generation In Java
Using Barcode creator for Java Control to generate, create USPS PLANET Barcode image in Java applications.
www.OnBarcode.com
Never
PDF-417 2d Barcode Recognizer In None
Using Barcode scanner for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
Create PDF417 In Java
Using Barcode drawer for Android Control to generate, create PDF417 image in Android applications.
www.OnBarcode.com
As the recipe states, you should also ensure that your EJB declares itself a CMT bean by specifying Container in the <transaction-type/> element of the deployment descriptor. A value of Bean indicates that the bean itself is handling its own transactions, in which case you do not need to specify the transaction attribute for methods.
Recognize Barcode In Java
Using Barcode Control SDK for BIRT Control to generate, create, read, scan barcode image in BIRT applications.
www.OnBarcode.com
Generating Barcode In .NET
Using Barcode generation for ASP.NET Control to generate, create Barcode image in ASP.NET applications.
www.OnBarcode.com
Handling transaction management without the container
Painting DataMatrix In VB.NET
Using Barcode generation for .NET framework Control to generate, create Data Matrix image in .NET applications.
www.OnBarcode.com
Print PDF 417 In VB.NET
Using Barcode creator for .NET Control to generate, create PDF 417 image in VS .NET applications.
www.OnBarcode.com
5.2 Handling transaction management without the container
UPC-A Supplement 5 Maker In None
Using Barcode generator for Word Control to generate, create UCC - 12 image in Word applications.
www.OnBarcode.com
Data Matrix ECC200 Scanner In Java
Using Barcode reader for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
Problem
Scanning Barcode In Java
Using Barcode scanner for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
Recognize Barcode In None
Using Barcode scanner for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
You want to know how to develop your enterprise beans to manage transactions without the container.
Code 39 Extended Generator In None
Using Barcode printer for Software Control to generate, create Code 39 Extended image in Software applications.
www.OnBarcode.com
Barcode Decoder In Visual Studio .NET
Using Barcode scanner for VS .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
Background
In most situations, container-managed transactions will satisfy the needs of your EJB application. However, situations may arise where beans need more control over the transactions controlling their methods. For instance, with CMT beans you are limited to a single transaction per method. By managing transactions without the container you ll have finer-grained control of the transactions within a single method. Only session beans are allowed to manage their own transactions. Entity beans must always use container-managed transactions.
Recipe
Use the EJBContext instance of your EJB to acquire the current UserTransaction instance from the container:
UserTransaction transaction = ejbContext.getUserTransaction();
After acquiring a transaction instance, you can use it to wrap a certain section of code (as described in the Discussion section). In addition, you can use the EJBContext to access more transactions as needed.
Discussion
While you may invoke this method from any type of EJB, it will actually succeed only inside EJBs that can manage their own transactions and only session beans and message-driven beans are free to manage their own transactions. If an entity bean makes a call to this method, it will result in a java.lang.IllegalStateException. Likewise, invocations by beans that have not declared their transaction type to be bean-managed will result in an exception. The following sample XML describes a BMT session bean. Use something similar for your own EJB.
<session> <description>Example</description> <ejb-name>User</ejb-name> <home>UserHome</home> <remote>User</remote>
Transactions
<ejb-class>UserBean</ejb-class> <session-type>Stateful</session-type> <transaction-type>Bean</transaction-type> </session>
Use the getUserTransaction() method of the EJBContext class (as shown in the recipe) to acquire a transaction instance. Once you have an instance of UserTransaction, you can do the following:
transaction.begin(); //perform operations inside a transaction transaction.commit();
After committing a transaction, you can acquire another one in the same manner, allowing you to program fine-grained transaction control of your method implementation. (See recipe 5.9 for more information.) Generally, you should always use container-managed transactions because the EJB container is specifically designed to handle transactions properly to avoid problems associated with transactional systems. However, there certainly is a time and place for BMT beans, for instance when you need a finer-grained transactional method. Instead of using your EJBContext object to get a transaction, acquire the transaction using JNDI. The following code demonstrates:
InitialContext context = new InitialContext(); UserTransaction transaction = ( UserTransaction ) context.lookup( "java:comp/env/UserTransaction" );
After acquiring the UserTransaction instance, you can use it as illustrated in the discussion.
See also
5.1 Tuning the container transaction control for your EJB
5.3 Rolling back the current transaction
Problem
You want to know how to force the rollback of the current transaction.
Background
Before the end of a transaction, you want to roll back the current transaction regardless of the outcome of the method. Your code has detected an error or a
Rolling back the current transaction
condition that will cause the code to fail, and you want to roll back the previously executed code within the transaction.
Recipe
If you are using bean-managed transactions, you should use the methods in the UserTransaction class. Acquire the UserTransaction instance from the EJBContext set in your EJB (see recipe 5.2 for more information). From the UserTransaction, use one of the following methods:
transaction.rollback(); transaction.setRollbackOnly();
On the other hand, if your bean uses container-managed transactions, it must use the following method of the EJBContext :
ejbContext.setRollbackOnly();
Discussion
For BMT beans, use one of the rollback methods in the UserTransaction object acquired from the container. The rollback() method tells the container to start a rollback immediately, while the setRollbackOnly() method only marks the transaction for rollback (which will occur after the EJB method completes). Ultimately, these methods will cause the current transaction to be rolled back and undo any updates that were performed. Collectively, they can throw three different exceptions:
SecurityException Thrown by the rollback() method if the thread using the UserTransaction is not allowed to perform a rollback IllegalStateException Thrown if the current thread is not associated
Copyright © OnBarcode.com . All rights reserved.