Abstract: In accordance with an embodiment, a system and method provides a dynamic clustered messaging service in an application server environment. A cluster includes one or more servers operating within the application server environment and is configured to vary a number of the servers based on a service load of applications running on the cluster. The number also varies based on failure and restart of the servers. A messaging service for communicating messages between components of the applications includes instances of messaging service artifacts running on the one or more servers. A placement engine operating on the cluster is configured to migrate the instances of messaging service artifacts between the one or more servers based on a set of rules as the number of the one or more servers in the cluster expands and contracts and as a number of the instances of messaging service artifacts expands and contracts.

Abstract: In accordance with an embodiment, a system and method provides a dynamic clustered messaging service in an application server environment. A cluster includes one or more servers operating within the application server environment and is configured to vary a number of the servers based on a service load of applications running on the cluster. The number also varies based on failure and restart of the servers. A messaging service for communicating messages between components of the applications includes instances of messaging service artifacts running on the one or more servers. A placement engine operating on the cluster is configured to migrate the instances of messaging service artifacts between the one or more servers based on a set of rules as the number of the one or more servers in the cluster expands and contracts and as a number of the instances of messaging service artifacts expands and contracts.

Abstract: The present invention enables “unit-of-order”, which allows a message producer to group messages into a single unit. It guarantees that messages are not only delivered to consumers in order, they are also are processed in order. The unit-of-order will be delivered to consumers as one unit and only one consumer will process messages from the unit at a time. The processing of a single message is complete when it is acknowledged, committed, recovered, or rolled back. Until message processing for a message is complete, the remaining unprocessed messages for that unit-of-order are blocked.

Abstract: Disclosed herein is a system and method for client interoperability. In one embodiment, a method for client interoperability comprises establishing a network connection between a client and a proxy. The client requests a connection factory from the proxy. The proxy then obtains the connection factory from an application server using a Java Naming and Directory Interface (JNDI). Using the connection factory, a connection to a connection host from the client is created. When the client sends a message, the proxy receives the message and routes the message to a destination server. Similarly, when the client receives a message, the proxy receives the message from a destination server and passes the message to the client. The client can be specifically configured to extend JMS operability to a desired language. In one embodiment the client is a .NET client.

Abstract: Disclosed herein is a system and method for client interoperability. In one embodiment, a method for client interoperability comprises establishing a network connection between a client and a proxy. The client requests a connection factory from the proxy. The proxy then obtains the connection factory from an application server using a Java Naming and Directory Interface (JNDI). Using the connection factory, a connection to a connection host from the client is created. When the client sends a message, the proxy receives the message and routes the message to a destination server. Similarly, when the client receives a message, the proxy receives the message from a destination server and passes the message to the client. The client can be specifically configured to extend JMS operability to a desired language. In one embodiment the client is a .NET client.

Abstract: The present invention enables “unit-of-order”, which allows a message producer to group messages into a single unit. It guarantees that messages are not only delivered to consumers in order, they are also are processed in order. The unit-of-order will be delivered to consumers as one unit and only one consumer will process messages from the unit at a time. The processing of a single message is complete when it is acknowledged, committed, recovered, or rolled back. Until message processing for a message is complete, the remaining unprocessed messages for that unit-of-order are blocked.