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Java Source Code / Java Documentation » Database ORM » db ojb » org.apache.ojb.broker 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


org.apache.ojb.junit.PBTestCase
   org.apache.ojb.broker.ProxyExamples

ProxyExamples
public class ProxyExamples extends PBTestCase (Code)
Demo Application that shows basic concepts for Applications using the PersistenceBroker as a mediator for persistence



Constructor Summary
public  ProxyExamples(String name)
    

Method Summary
public static  voidmain(String[] args)
    
public  voidtestCollectionProxies()
    
public  voidtestCollectionProxiesAndExtents()
    
public  voidtestDynamicProxies()
     This example shows how the PersistenceBroker can be used with a highly configurable proxy concept. The main idea is, not to return materialized objects but rather lazy proxies, that defer materialization until it is definitely neccesary (e.g.
public  voidtestProgrammedProxies()
     This example shows how the PersistenceBroker can be used with a highly configurable proxy concept. The main idea is, not to return materialized objects but rather lazy proxies, that defer materialization until it is definitely neccesary (e.g.
public  voidtestProxiesAndJDBCTransactionIsolation()
     Default the transaction isolation level of a JDBC connection is READ-COMMITED. So if a proxy uses another broker instance (i.e.
public  voidtestReferenceProxies()
    


Constructor Detail
ProxyExamples
public ProxyExamples(String name)(Code)




Method Detail
main
public static void main(String[] args)(Code)



testCollectionProxies
public void testCollectionProxies() throws Exception(Code)



testCollectionProxiesAndExtents
public void testCollectionProxiesAndExtents() throws Exception(Code)



testDynamicProxies
public void testDynamicProxies()(Code)
This example shows how the PersistenceBroker can be used with a highly configurable proxy concept. The main idea is, not to return materialized objects but rather lazy proxies, that defer materialization until it is definitely neccesary (e.g. reading an Objects attribute).

To achieve such a behaviour, you can define proxies for each persistent class. As an example see the Repository.xml file in this examples directory.

It is not always the best option to use lazy materialization. The usage of proxies can be completely configured in the xml repository. That is, if you decide not to use proxies, you don't have to change program-code, but only out-comment the corresponding entry in the repos itory.




testProgrammedProxies
public void testProgrammedProxies() throws Exception(Code)
This example shows how the PersistenceBroker can be used with a highly configurable proxy concept. The main idea is, not to return materialized objects but rather lazy proxies, that defer materialization until it is definitely neccesary (e.g. reading an Objects attribute).

To achieve such a behaviour, you can define proxies for each persistent class. As an example see the Repository.xml file in this examples directory.

It is not always the best option to use lazy materialization. The usage of proxies can be completely configured in the xml repository. That is, if you decide not to use proxies, you don't have to change program-code, but only out-comment the corresponding entry in the repos itory.




testProxiesAndJDBCTransactionIsolation
public void testProxiesAndJDBCTransactionIsolation()(Code)
Default the transaction isolation level of a JDBC connection is READ-COMMITED. So if a proxy uses another broker instance (i.e. JDBC connecction) than the current one, it's possible that program blocks.



testReferenceProxies
public void testReferenceProxies()(Code)



Fields inherited from org.apache.ojb.junit.PBTestCase
public PersistenceBroker broker(Code)(Java Doc)

Methods inherited from org.apache.ojb.junit.PBTestCase
public String getPlatformClass()(Code)(Java Doc)
public void pbPersist(Object obj)(Code)(Java Doc)
public void setUp() throws Exception(Code)(Java Doc)
public void tearDown() throws Exception(Code)(Java Doc)

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