Radhe Dubey
In java world, hashCode & equals method plays a very important role. Uses of equals():- In java, equals() method used to assure equality of object and it should follow mathematics rule of equality. Reflexive: Always, a = a. In Java, a.equals(a) should always be true. Symmetric: If a = b, then b = a. In Java, if a.equals(b) is … Continue reading hashCode and equals method
Object level locking:- Synchronization means synchronizing state changes of Object and that we can achieve it via synchronizing block in any java class. Suppose we have a java class with few instance variable whose values get changed i.e state of objects for that class get changed time to time. To avoid data corruption or inconsistency, … Continue reading Thread synchronization, object level locking and class level locking
JAMon is a free Java monitoring API , used to monitor your application or fine tuning your application performance. Do following steps to use JAmon in your code copy jamon-2.7.jar in classpath Add these lines to your code where to like to monitor // start the JAMon monitor Monitor mon = MonitorFactory.start(“Your Label”); … your … Continue reading Java Monitoring API (Jamon)
Loading Multiple Spring Bean Configuration File Put all spring xml files under project classpath. Define one main module beans configuration file. Say AppContext.xml <beans xmlns=”http://www.springframework.org/schema/beans” xmlns:xsi=”http://www.w3.org/2001/XMLSchema-instance” xsi:schemaLocation=”http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd”> <import resource=”classpath:AppServicesContext.xml”/> <import resource=”classpath:AppConnectionContext.xml”/> <import resource=”classpath:AppModuleA.xml”/> <import resource=”classpath:AppModuleB.xml”/> </beans> Now you can load a single xml file like this : ApplicationContext context = new ClassPathXmlApplicationContext(“AppContext.xml”);
Often times, Spring developers keep there configuration value in XML file itself. Say for example DB setting as <bean id=”dataSource” class=”org.springframework.jdbc.datasource.DriverManagerDataSource”> <property name=”driverClassName” value=”com.mysql.jdbc.Driver” /> <property name=”url” value=”jdbc:mysql://localhost:3306/rr” /> <property name=”username” value=”root” /> <property name=”password” value=”password” /> </bean> But, in a corporate environment, deployment detail is usually only can ‘touch’ by your system or database … Continue reading Using Property File in Spring
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