Cluster-Based Business Process Management Through Eager Displacement And On-Demand Recovery

• US 20100153345A1
• Filed: 12/12/2008
• Published: 06/17/2010
• Est. Priority Date: 12/12/2008
• Status: Active Grant

• Current Assignee: SAP SE
• Original Assignee: SAP SE
• Inventors: Balko, Soren, Miltz, Matthias, Klinker, Boris, Ginkel, Thilo-Alexander
• Granted Patent: US 9,588,806 B2
• Time in Patent Office: Days
• US Class Current: 707/690
• CPC Class Codes: G06F 16/10 File systems; File servers
• CPC Class Codes: G06F 16/20 of structured data, e.g. relational data
• CPC Class Codes: G06F 16/2308 Concurrency control transaction processing G06F9/466
• CPC Class Codes: G06F 16/2315 Optimistic concurrency control
• CPC Class Codes: G06F 16/27 Replication, distribution or synchronisation of data between databases or within a distributed database system; Distributed database system architectures therefor
• CPC Class Codes: G06F 16/275 Synchronous replication
• CPC Class Codes: G06F 16/284 Relational databases
• CPC Class Codes: G06F 9/466 Transaction processing
• CPC Class Codes: G06F 9/4856 resumption being on a different machine, e.g. task migration, virtual machine migration G06F9/5088 takes precedence

Abstract

Methods and apparatus, including computer program products, are provided for transporting processes within a distributed computing system, such as a cluster. In one aspect, the computer-implemented method may receive an event at a first node. The event may correspond to a process instance for handling the received event. The process instance may be transported from a second node to the first node. The process instance may be transported from a persistence when the process instance is inactive and, when the process instance is active, the process instance may be persisted to enable transport to the first node. Related apparatus, systems, methods, and articles are also described.

Claims

1. A computer-implemented method comprising:

receiving an event at a first node, the event corresponding to a process instance for handling the received event; and

transporting the process instance to the first node from a second node, the process instance transported from a persistence when the process instance is inactive and, when the process instance is active, waiting to persist the process instance to enable transport to the first node.

2. The computer-implemented method of claim 1, further comprising:

committing to a database a transaction when the transported process instance is received at the first node and the received event is delivered to the transported process instance

3. The computer-implemented method of claim 1, further comprising:

responding, when the process instance is inactive, to a request to release the process instance at the second node to change an owner node of the process instance from the second node to the first node.

4. The computer-implemented method of claim 1, further comprising:

receiving, at the second node, a request to release the process instance for transport to the first node, the process instance active at the second node.

5. The computer-implemented method of claim 4, further comprising:

persisting, in response to request, the process instance, when the process instance becomes inactive at the second node.

6. The computer-implemented method of claim 4, further comprising:

responding, when the process instance is inactive, to the request to release the process instance at the second node.

7. A computer-readable medium containing instructions to configure a processor to perform a method, the method comprising:

receiving an event at a first node, the event corresponding to a process instance for handling the received event; and

transporting the process instance to the first node from a second node, the process instance transported from a persistence when the process instance is inactive and, when the process instance is active, waiting to persist the process instance to enable transport to the first node.

8. The computer-readable medium of claim 7, further comprising:

committing to a database a transaction when the transported process instance is received at the first node and the received event is delivered to the transported process instance

9. The computer-readable medium of claim 7, further comprising:

responding, when the process instance is inactive, to a request to release the process instance at the second node to change an owner node of the process instance from the second node to the first node.

10. The computer-readable medium of claim 7, further comprising:

receiving, at the second node, a request to release the process instance for transport to the first node, the process instance active at the second node.

11. The computer-readable medium of claim 10, further comprising:

persisting, in response to request, the process instance, when the process instance becomes inactive at the second node.

12. The computer-readable medium of claim 10, further comprising:

responding, when the process instance is inactive, to the request to release the process instance at the second node.

13. A system comprising:

a processor; and

a memory, the processor and memory configured to perform a method comprising;

receiving an event at a first node, the event corresponding to a process instance for handling the received event; and

transporting the process instance to the first node from a second node, the process instance transported from a persistence when the process instance is inactive and, when the process instance is active, waiting to persist the process instance to enable transport to the first node.

14. The system of claim 13, further comprising:

committing to a database a transaction when the transported process instance is received at the first node and the received event is delivered to the transported process instance

15. The system of claim 13, further comprising:

responding, when the process instance is inactive, to a request to release the process instance at the second node to change an owner node of the process instance from the second node to the first node.

16. The system of claim 13, further comprising:

receiving, at the second node, a request to release the process instance for transport to the first node, the process instance active at the second node.

17. The system of claim 16, further comprising:

persisting, in response to request, the process instance, when the process instance becomes inactive at the second node.

18. The system of claim 16, further comprising:

responding, when the process instance is inactive, to the request to release the process instance at the second node.