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8.1 8.2 8.3 8.4 8.5 8.6 Formatting log messages 251 8.2 Improving logging performance 254 Improving logging performance 254 8.1 Formatting log messages 251 Using logging to generate reports 257 8.1 Formatting log messages 251 Sending log messages to a JMS topic 258 barcode generator java source code Java QR Code Generator - zxing example - JournalDev
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Barbecue is a Java library that enables the creation of barcodes in a variety of standard formats that can be displayed as Swing/AWT components, included in printed output, generated as EPS and SVG and displayed in a web application. When a bean is accessed through a factory that does not originally support AOP, it is still possible to programmatically add some AOP features. This is done through ProxyFactory, which allows for the dynamic creation of a new proxy delegating to a new proxied bean. Listing 6-35 shows an example. Listing 6-35. Example of Use for the Proxy Factory // creates a new proxy factory ProxyFactory factory = new ProxyFactory(MyBusinessInterfaceImpl); // adds an interceptor to be added to all methods factory.addInterceptor(myMethodInterceptor); // adds an advisor factory.addAdvisor(myAdvisor); // retrieves an AOP proxy for my business interface MyBusinessInterface tb = (MyBusinessInterface) factory.getProxy(); Just remember that you have to manage the lifecycle of an application-managed EntityManager (see listing 12.4); the container is not going to do it for you in this situation. generate code 128 barcode java Advanced Scanning Tutorial using Barcode API - Zebra Techdocs
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19 Jan 2019 ... QRcoba – A QR/ Barcode Generator and Scanner Android App with Admob QRCoba is built using native Java language in Andr... try { Begins ... transaction ut.begin(); em = emf.createEntityManager(); em.persist(item); ... ut.commit(); ... } catch (Exception e) { try { ut.rollback(); } catch (Exception e) { } finally { Closes EntityManager em.close(); } } Logging to an XML file 259 8.2 Improving logging performance 254 Creating log file views for the web browser 261 8.2 Improving logging performance 254 8.5 Logging to an XML file 259 Creating a centralized log file in a clustered environment 263 6.3 Creating a message-driven Enterprise JavaBean 202 8.1 Formatting log messages 251 8.4 Sending log messages to a JMS topic 258 8.10 Sorting log messages by client 269 Tracking the lifecycle of an EJB 265 8.1 Formatting log messages 251 8.2 Improving logging performance 254 Using a different configuration at runtime 267 java barcode Barcode API Overview | Mobile Vision | Google Developers
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ZXing is a free open source Java library to read and generate barcode images. You need to get the source code and build the jars yourself. In listing 12.4 we are doing a lot of housekeeping to manage the lifecycle of the EntityManager and to manually manage transactions. Unless you have a specific reason to use an application-managed EntityManager, we recommend using the Session Fa ade design pattern (discussed in 12.2.3) with CMT, and a containermanaged EntityManager. The EJB 3 incarnation of session beans are lightweight POJOs, which make life easier by not requiring the developer to manage the lifecycle of entity managers or transactions. In Spring, a factory can be configured to automatically create specific proxies for the accessed beans. This is the auto-proxy feature. Developers write all sorts of applications. You might have some applications, such as a Swing or SWT application, for which you d prefer to use JPA outside the EJB 3 container. Or perhaps you just want to utilize web containers like Tomcat or Jetty that are not Java EE 5 containers, or one of the other lightweight containers that do not have support for a container-managed EntityManager or JTA transactions. Another case in which you might want to use JPA outside the EJB 3 container is when you re testing your entities. You can use the approach we discuss here in conjunction with a test framework such as JUnit and to test entities outside the container. 8.9 8.10 It s simple to use JPA without an EJB 3 container. All you need to do is create a persistence unit and create an EntityManager from the EntityManagerFactory obtained from the Persistence class. Let s look at an example. Defining a persistence unit As you know from chapters 9 and 11, a persistence unit requires a DataSource configured in the application server that is used by the persistence provider to connect to the database. Normally, the Java EE container will provide this, but if you are using JPA outside the container, you must provide the JDBC configuration as vendor-specific properties in the persistence.xml file. Listing 12.5 shows a sample persistence.xml that illustrates the JDBC configuration for the GlassFish server. The property names will vary depending on which persistence provider you re using. <persistence xmlns = "http://java.sun.com/xml/ns/persistence" version = "1.0"> <persistence-unit name = "actionBazaar"> <provider>oracle.toplink.essentials.PersistenceProvider</provider> <class>actionbazaar.persistence.Bid</class> <class>actionbazaar.persistence.Item</class> <properties> <property name = "toplink.jdbc.driver" value = "oracle.jdbc.OracleDriver"/> <property name = "toplink.jdbc.url" value = "jdbc:oracle:thin:@//localhost:1521/ORCL"/> <property name = "toplink.jdbc.user" value = "scott"/> <property name = "toplink.jdbc.password" value = "tiger"/> </properties> </persistence-unit> JDBC configuration </persistence> java barcode generator tutorial Welcome to Barcode4J
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