Developing Transactional JEE Apps With Spring

Transactional J(2)EE Applications with Spring Transactional POJO Programming Guy Pardon (guy@atomikos.com)

Contents ,[object Object],[object Object],[object Object]

The Spring Framework ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Configuring a DataSource ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Ask Spring to create an object with this name and of this class, and to set the given properties

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],A Client Component

Wiring Objects Together ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Ask Spring to establish an association between the Objects called bank and datasource

Bank Class: “setDataSource” ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Our Java code can now be independent of the actual JDBC vendor classes. This is called by the Spring wiring runtime.

Applications: Configuration No Longer Hard-Coded ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Just ask the Spring BeanFactory to use our XML configuration file. We can ask Spring to return configured objects by their name (id)

Spring Benefits ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Transactions in Spring? ,[object Object],[object Object],[object Object],[object Object]

Part 2 Transaction Support in Spring

Spring and Transactions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Transaction Strategies in Spring ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Single-Connector Strategies ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

JDBC Strategy ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Spring XML Config? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Example: Declarative + JDBC Strategy (1) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Vendor-specific datasource setup. Proxy required for JDBC strategy in Spring. Our bank’s JDBC is done via the proxy.

Example: Declarative + JDBC Strategy (2) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Clients of our bank will use a proxy that inserts transaction logic. Transaction required, rollback on any exception.

JTA Strategy ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Example: Declarative + JTA Strategy (1) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Vendor-specific datasource setup (JTA enabled class). Setup Atomikos standalone JTA.

Example: Declarative + JTA Strategy (2) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Tell Spring to use the Atomikos JTA implementation.

Using Other JTA Implementations ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Transaction Attributes in Spring ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Use Case 1: From Queue to DB Avoiding message loss and duplicates requires JTA! JMS JDBC Message Queue Message Listener Order Dept. DBMS Spring Application

Use Case 2: From Queue to Queue JMS Bridge Avoiding message loss and duplicates requires JTA! JMS JMS Source Queue Target Queue

Use Case 3: From Web to DB and Queue Web Application Consistent Processing Requires JTA! JMS JDBC Message Queue Order Dept. DBMS HTTP

Use Case 4: Between 2 DBs Web Application Consistent Processing Requires JTA! JDBC JDBC Order Dept. DBMS HTTP Shipping Dept. DBMS

Conclusion: Spring Improves J2EE ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

More Information? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Developing Transactional JEE Apps With Spring

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