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PORight configuration for spring mvc app
 

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  1. PORight configuration for spring mvc app
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    <p>I read this "It is a best practice to keep a clear separation between middle-tier services such as business logic components and data access classes (that are typically defined in the ApplicationContext) and web- related components such as controllers and view resolvers (that are defined in the WebApplicationContext per Dispatcher Servlet)."</p> <p>And decide configure my application like that 4 separate xml file </p> <p>applicationContext.xml</p> <pre><code>&lt;context:component-scan base-package="appname"&gt; &lt;context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/&gt; &lt;/context:component-scan&gt; </code></pre> <p>dao.xml</p> <pre><code>&lt;!-- MySQL JDBC Data Source--&gt; &lt;bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"&gt; &lt;property name="driverClassName" value="com.mysql.jdbc.Driver"/&gt; &lt;property name="url" value="jdbc:mysql://#{mysqlDbCredentials.hostname}:#{mysqlDbCredentials.port}/#{mysqlDbCredentials.name}"/&gt; &lt;property name="username" value="#{mysqlDbCredentials.username}"/&gt; &lt;property name="password" value="#{mysqlDbCredentials.password}"/&gt; &lt;/bean&gt; &lt;bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"&gt; &lt;property name="persistenceUnitName" value="JpaPersistenceUnit" /&gt; &lt;property name="dataSource" ref="dataSource" /&gt; &lt;property name="jpaVendorAdapter"&gt; &lt;bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"&gt; &lt;property name="showSql" value="true"/&gt; &lt;property name="databasePlatform" value="org.hibernate.dialect.MySQL5Dialect"/&gt; &lt;/bean&gt; &lt;/property&gt; &lt;property name="jpaProperties"&gt; &lt;props&gt; &lt;prop key="hibernate.hbm2ddl.auto"&gt;update&lt;/prop&gt; &lt;prop key="hibernate.showSql"&gt;true&lt;/prop&gt; &lt;/props&gt; &lt;/property&gt; &lt;/bean&gt; &lt;bean class="org.springframework.orm.jpa.JpaTransactionManager" id="transactionManager"&gt; &lt;property name="entityManagerFactory" ref="entityManagerFactory" /&gt; &lt;/bean&gt; &lt;tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true"/&gt; </code></pre> <p>and mvc-dispatcher-servlet.xml</p> <pre><code> &lt;mvc:annotation-driven /&gt; &lt;context:component-scan base-package="appname" use-default-filters="false"&gt; &lt;context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/&gt; &lt;/context:component-scan&gt; </code></pre> <p>web.xml(load spring context)</p> <pre><code> &lt;servlet&gt; &lt;servlet-name&gt;mvc-dispatcher&lt;/servlet-name&gt; &lt;servlet-class&gt; org.springframework.web.servlet.DispatcherServlet &lt;/servlet-class&gt; &lt;init-param&gt; &lt;param-name&gt;contextConfigLocation&lt;/param-name&gt; &lt;param-value&gt; /WEB-INF/spring/mvc-dispatcher-servlet.xml &lt;/param-value&gt; &lt;/init-param&gt; &lt;load-on-startup&gt;1&lt;/load-on-startup&gt; &lt;/servlet&gt; &lt;servlet-mapping&gt; &lt;servlet-name&gt;mvc-dispatcher&lt;/servlet-name&gt; &lt;url-pattern&gt;/spring/*&lt;/url-pattern&gt; &lt;/servlet-mapping&gt; &lt;!-- Load spring beans definition files --&gt; &lt;context-param&gt; &lt;param-name&gt;contextConfigLocation&lt;/param-name&gt; &lt;param-value&gt; /WEB-INF/spring/applicationContext.xml /WEB-INF/spring/security.xml /WEB-INF/spring/dao.xml &lt;/param-value&gt; &lt;/context-param&gt; </code></pre> <p>But I'm absolutly confused. 1)I don't understand how many context in this case I get.<br> 2)I want easy replace tx mode on aspectj (which work just in ome context as I know). But when I replace I get error with transation.</p> <p>Main problem that I want to have universal variant for both type of transaction Here I add <code>mode="aspectj"</code> and I have annotation like @Service, @Resourse, on concrete classes </p> <pre><code> &lt;tx:annotation-driven transaction-manager="transactionManager" mode="aspectj" proxy-target-class="true"/&gt; </code></pre> <p>All seems should work but I get next exception on <code>flush</code></p> <pre><code>org.springframework.web.util.NestedServletException: Request processing failed; nested exception is javax.persistence.TransactionRequiredException: no transaction is in progress at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:948) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:827) at javax.servlet.http.HttpServlet.service(HttpServlet.java:575) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812) at javax.servlet.http.HttpServlet.service(HttpServlet.java:668) at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1239) at [internal classes] at org.apache.logging.log4j.core.web.Log4jServletFilter.doFilter(Log4jServletFilter.java:66) at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:194) at [internal classes] Caused by: javax.persistence.TransactionRequiredException: no transaction is in progress at org.hibernate.ejb.AbstractEntityManagerImpl.flush(AbstractEntityManagerImpl.java:993) at sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:-2) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) </code></pre> <p>Please, help me uderstand better</p>
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    1. COIs there a specific reason for using XML? I find that modularizing configuration is a lot simpler using JavaConfig.
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    2. CO@chrylis Just a habbit and need to make it quickly
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    3. COHow many contexts you get depends on how all of these files are getting loaded. I don't see anything that imports anything else; how is Spring finding all of these? For what it's worth, I regularly build apps as several-module Maven projects, and I include appropriate `@Configuration` classes and just component-scan them all from a single entry point, most lately Spring Boot, but a traditional XML file like your first one would also work.
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