EAServer Transaction Manager provides transaction interoperability in accordance with the OTS specifications.
When EAServer runs in JTS mode, it can share the transaction coordinator across multiple servers. If a transactional component on one server invokes a component method on another server, both components can participate in the same transaction. Also, a client can invoke components on multiple servers that all participate in the same transaction. This feature is useful for load balancing.
Figure 2-4 illustrates a scenario in which a client calls a component method on Server A, which calls a component method on Server B. Server A and Server B use different databases. To ensure that all the database updates occur within the scope of a single transaction, EAServer passes the transaction context between servers.
Figure 2-4: Transaction interoperability
Figure 2-5 illustrates an example where a client calls components on multiple servers, which all participate in the same transaction. The client manages the transaction by calling component methods on each server and passing the transaction context.
