Versions Compared

Old Version 1

changes.mady.by.user Unknown User (kelveny)

Saved on

compared with

New Version 2

changes.mady.by.user Unknown User (kelveny)

Saved on

Key

  • This line was added.
  • This line was removed.
  • Formatting was changed.

...

Panel

<beans xmlns="http://www.springframework.org/schema/beans"

  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 

  xmlns:context="http://www.springframework.org/schema/context"

  xmlns:tx="http://www.springframework.org/schema/tx" 

  xmlns:aop="http://www.springframework.org/schema/aop"

  xsi:schemaLocation="http://www.springframework.org/schema/beans

_                      http://www.springframework.org/schema/beans/spring-beans-3.0.xsd_Image Removed

_                      http://www.springframework.org/schema/tx&nbsp;tx _Image Removed

_                      http://www.springframework.org/schema/tx/spring-tx-3.0.xsd_Image Removed

_                      http://www.springframework.org/schema/aop_Image Removed

_                      http://www.springframework.org/schema/aop/spring-aop-3.0.xsd_Image Removed

_                      http://www.springframework.org/schema/context_Image Removed

                      http://www.springframework.org/schema/context/spring-context-3.0.xsdImage Removed">                     

 

  <context:annotation-config />

 

  <context:component-scan base-package="org.apache.cloudstack, com.cloud" />

 

  <!--

    @DB support

  -->

  <aop:config proxy-target-class="true">

    <aop:aspect id="dbContextBuilder" ref="transactionContextBuilder">

        <aop:pointcut id="captureAnyMethod"

            expression="execution(* *(..))" 

        />

 

        <aop:around pointcut-ref="captureAnyMethod" method="AroundAnyMethod"/> 

    </aop:aspect>

    <aop:aspect id="actionEventInterceptorAspect" ref="actionEventInterceptor">

        <aop:pointcut id="captureEventMethod"

            expression="execution(* *(..)) and @annotation(com.cloud.event.ActionEvent)" 

        />

        <aop:around pointcut-ref="captureEventMethod" method="AroundAnyMethod"/> 

    </aop:aspect>

 

  </aop:config>

 

  <bean id="transactionContextBuilder" />

  <bean id="actionEventInterceptor" />

  

  <!--

    RPC/Async/EventBus

  -->

  <bean id="onwireRegistry"

    init-method="scan" >

    <property name="packages">

      <list>

        <value>org.apache.cloudstack.framework</value>

      </list>

    </property>

  </bean>

 

  <bean id="messageSerializer">

    <property name="onwireClassRegistry" ref="onwireRegistry" />

  </bean>

 

  <bean id="transportProvider"  init-method="initialize">

    <property name="workerPoolSize" value="5" />

    <property name="nodeId" value="Node1" />

    <property name="messageSerializer" ref="messageSerializer" />

  </bean>

  <bean id="rpcProvider" init-method="initialize">

    <constructor-arg ref="transportProvider" />

    <property name="messageSerializer" ref="messageSerializer" />

  </bean>

 

  <bean id="eventBus" class = "org.apache.cloudstack.framework.eventbus.EventBusBase" />

  <bean id="apiServlet" class = "com.cloud.api.ApiServlet" />

</beans>

...

Panel

<beans xmlns="http://www.springframework.org/schema/beans"

  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 

  xmlns:context="http://www.springframework.org/schema/context"

  xmlns:tx="http://www.springframework.org/schema/tx" 

  xmlns:aop="http://www.springframework.org/schema/aop"

  xsi:schemaLocation="http://www.springframework.org/schema/beans

                      http://www.springframework.org/schema/beans/spring-beans-3.0.xsdImage Removed

                      http://www.springframework.org/schema/tx&nbspImage Removed;

                      http://www.springframework.org/schema/tx/spring-tx-3.0.xsdImage Removed

                      http://www.springframework.org/schema/aopImage Removed

                      http://www.springframework.org/schema/aop/spring-aop-3.0.xsdImage Removed

                      http://www.springframework.org/schema/contextImage Removed

                      http://www.springframework.org/schema/context/spring-context-3.0.xsdImage Removed">                     

  <!--

      Compose a CloudStack deployment with selected components here

  -->

  <bean id="databaseUpgradeChecker" />

  <bean id="management-server" class ="com.cloud.server.ManagementServerExtImpl" />

  <bean id="configuration-server" />

  <bean id="clusterManagerImpl" />

  <bean id="clusteredAgentManagerImpl" />

  <bean id="clusteredVirtualMachineManagerImpl" />

  <bean id="highAvailabilityManagerExtImpl" />

  <!-- bean id="bareMetalVmManagerImpl" / -->

  <bean id="userVmManagerImpl" />

  <bean id="consoleProxyManagerImpl" />

  <bean id="securityGroupManagerImpl2" />

  <bean id="premiumSecondaryStorageManagerImpl" />

  <bean id="randomlyIncreasingVMInstanceDaoImpl" /> 

  <!--

      Network Elements

  -->

  <bean id="Ovs">

    <property name="name" value="Ovs"/>

  </bean>

  <bean id="ExternalDhcpServer">

    <property name="name" value="ExternalDhcpServer"/>

  </bean>

  <bean id="BareMetal">

    <property name="name" value="BareMetal"/>

  </bean>

  <bean id="SecurityGroupProvider">

    <property name="name" value="SecurityGroupProvider"/>

  </bean>

  <bean id="VirtualRouter">

    <property name="name" value="VirtualRouter"/>

  </bean>

  <bean id="VpcVirtualRouter">

    <property name="name" value="VpcVirtualRouter"/>

  </bean>

  <bean id="NiciraNvp">

    <property name="name" value="NiciraNvp"/>

  </bean>

  ...

  ...

</beans> 

Panel

2. How to declare to be a CloudStack component

In Spring term, CloudStack uses both singleton components and prototype components, Spring component is nothing else more than a Java POJO object, you can either declare it with @Component annotation or in <bean> declaration in applicationContext.xml or componentContext.xml. CloudStack uses a lot of singleton components, for example, managers, DAOs, following is an example of such components

Panel
Wiki Markup

*@Component*

@Local(value=ClusterDao.class)

public class ClusterDaoImpl extends GenericDaoBase<ClusterVO, Long> implements ClusterDao {\\

&nbsp; &nbsp; protected final SearchBuilder<ClusterVO> PodSearch;

&nbsp; &nbsp; protected final SearchBuilder<ClusterVO> HyTypeWithoutGuidSearch;

&nbsp; &nbsp; protected final SearchBuilder<ClusterVO> AvailHyperSearch;

&nbsp; &nbsp; protected final SearchBuilder<ClusterVO> ZoneSearch;

&nbsp; &nbsp; protected final SearchBuilder<ClusterVO> ZoneHyTypeSearch;\\

&nbsp; &nbsp; private static final String GET_POD_CLUSTER_MAP_PREFIX = "SELECT pod_id, id FROM cloud.cluster WHERE cluster.id IN( ";

&nbsp; &nbsp; private static final String GET_POD_CLUSTER_MAP_SUFFIX = " )";

&nbsp; &nbsp; *@Inject*

&nbsp; &nbsp; protected HostPodDao \_hostPodDao;\\

&nbsp; &nbsp; public ClusterDaoImpl() {

&nbsp; &nbsp; &nbsp; &nbsp; super();\\

&nbsp; &nbsp; &nbsp; &nbsp; HyTypeWithoutGuidSearch = createSearchBuilder();

&nbsp; &nbsp; &nbsp; &nbsp; HyTypeWithoutGuidSearch.and("hypervisorType", HyTypeWithoutGuidSearch.entity().getHypervisorType(), SearchCriteria.Op.EQ);

&nbsp; &nbsp; &nbsp; &nbsp; HyTypeWithoutGuidSearch.and("guid", HyTypeWithoutGuidSearch.entity().getGuid(), SearchCriteria.Op.NULL);

&nbsp; &nbsp; &nbsp; &nbsp; HyTypeWithoutGuidSearch.done();\\

&nbsp; &nbsp; &nbsp; &nbsp; ZoneHyTypeSearch = createSearchBuilder();

&nbsp; &nbsp; &nbsp; &nbsp; ZoneHyTypeSearch.and("hypervisorType", ZoneHyTypeSearch.entity().getHypervisorType(), SearchCriteria.Op.EQ);

&nbsp; &nbsp; &nbsp; &nbsp; ZoneHyTypeSearch.and("dataCenterId", ZoneHyTypeSearch.entity().getDataCenterId(), SearchCriteria.Op.EQ);

&nbsp; &nbsp; &nbsp; &nbsp; ZoneHyTypeSearch.done();\\

&nbsp; &nbsp; &nbsp; &nbsp; PodSearch = createSearchBuilder();

&nbsp; &nbsp; &nbsp; &nbsp; PodSearch.and("pod", PodSearch.entity().getPodId(), SearchCriteria.Op.EQ);

&nbsp; &nbsp; &nbsp; &nbsp; PodSearch.and("name", PodSearch.entity().getName(), SearchCriteria.Op.EQ);

&nbsp; &nbsp; &nbsp; &nbsp; PodSearch.done();\\

&nbsp; &nbsp; &nbsp; &nbsp; ZoneSearch = createSearchBuilder();

&nbsp; &nbsp; &nbsp; &nbsp; ZoneSearch.and("dataCenterId", ZoneSearch.entity().getDataCenterId(), SearchCriteria.Op.EQ);

&nbsp; &nbsp; &nbsp; &nbsp; ZoneSearch.groupBy(ZoneSearch.entity().getHypervisorType());

&nbsp; &nbsp; &nbsp; &nbsp; ZoneSearch.done();\\

&nbsp; &nbsp; &nbsp; &nbsp; AvailHyperSearch = createSearchBuilder();

&nbsp; &nbsp; &nbsp; &nbsp; AvailHyperSearch.and("zoneId", AvailHyperSearch.entity().getDataCenterId(), SearchCriteria.Op.EQ);

&nbsp; &nbsp; &nbsp; &nbsp; AvailHyperSearch.select(null, Func.DISTINCT, AvailHyperSearch.entity().getHypervisorType());

&nbsp; &nbsp; &nbsp; &nbsp; AvailHyperSearch.done();

&nbsp; &nbsp; }

...

...

...

}\\

For most of low-level built-in components like DAOs, in Javelin practice, we use @Component annotation, since it saves us a lot of typing and can take advantage of Eclipse IDE's powerful refactoring and type-infer feature to help us coding. However, if you are developing high level components and you want to give flexibility for customer to choose to compose a particular CloudStack deployment, declare in componentContext.xml would be a better choice.

3. Auto-wiring