Abstract: A messaging entity configured in a memory of first node of a plurality communicatively coupled nodes is disclosed. The nodes are included in a distributed computing system. The messaging entity is configured to operate as a secondary messaging entity in a messaging server for the plurality communicatively coupled nodes. The messaging entity is communicatively couple to a primary messaging entity configured in a memory of a second node of the plurality of nodes. The primary messaging entity is configured to store a message; store a copy of the message.

Abstract: A method of creating a link of a connection to a messaging system includes receiving a protocol command message directed to a message entity of the messaging system. The protocol command message is communicated over the connection. The method includes determining that the protocol command message includes a link identifier that is unrecognized by the messaging system and in response to receiving the protocol command message and determining that the protocol command message includes the link identifier that is unrecognized by the messaging system, creating the link for the connection, the link corresponding to the link identifier.

Abstract: Network and storage calls are reduced by batching messages. Messages are collected from a client and sent to the gateway or backend application in one round trip. Alternatively, the messages are collected for different entities, and the batched messages are durably stored. Related messages, which may have the same sessionID, are grouped into a logical unit or session. This session may be locked to a single message consumer. A session may be associated with an application processing state as an atomic unit of work while other operations are performed on the messages in the session. Acknowledgements are accumulated by a broker on a message server, but the messages are not immediately deleted. Instead, multiple messages in a selected range are periodically truncated from a message store in a single operation. Expired messages for active sessions are proactive cleaned up to prevent sessions from reaching a quota or limit.

Abstract: A method of creating a link of a connection to a messaging system includes receiving a protocol command message directed to a message entity of the messaging system. The protocol command message is communicated over the connection. The method includes determining that the protocol command message includes a link identifier that is unrecognized by the messaging system and in response to receiving the protocol command message and determining that the protocol command message includes the link identifier that is unrecognized by the messaging system, creating the link for the connection, the link corresponding to the link identifier.

Abstract: A messaging entity configured in a memory of first node of a plurality communicatively coupled nodes is disclosed. The nodes are included in a distributed computing system. The messaging entity is configured to operate as a secondary messaging entity in a messaging server for the plurality communicatively coupled nodes. The messaging entity is communicatively couple to a primary messaging entity configured in a memory of a second node of the plurality of nodes. The primary messaging entity is configured to store a message; store a copy of the message.

Abstract: A messaging entity configured in a memory of first node of a plurality communicatively coupled nodes is disclosed. The nodes are included in a distributed computing system. The messaging entity is configured to operate as a secondary messaging entity in a messaging server for the plurality communicatively coupled nodes. The messaging entity is communicatively couple to a primary messaging entity configured in a memory of a second node of the plurality of nodes. The primary messaging entity is configured to store a message; store a copy of the message. Also, the messaging entity is configured to be promoted to a new primary messaging entity in the event of failure of the primary messaging entity.

Abstract: The present invention extends to methods, systems, and computer program products for load balancing for services. Embodiments of the invention facilitate load balancing between instances of a service based on affinitization of messages, based on content of the message. For example, messages in the same session can be dispatched to the same service instance. A sequence or series of related messages associated with long running and/or stateful services are more likely to be dispatched to the same instance of the service. Thus, if the service instance has persisted client state, there is an increased likely of utilizing the persisted client state and not having another service instance recreate the client state.

Abstract: Network and storage calls are reduced by batching messages. Messages are collected from a client and sent to the gateway or backend application in one round trip. Alternatively, the messages are collected for different entities, and the batched messages are durably stored. Related messages, which may have the same sessionID, are grouped into a logical unit or session. This session may be locked to a single message consumer. A session may be associated with an application processing state as an atomic unit of work while other operations are performed on the messages in the session. Acknowledgements are accumulated by a broker on a message server, but the messages are not immediately deleted. Instead, multiple messages in a selected range are periodically truncated from a message store in a single operation. Expired messages for active sessions are proactive cleaned up to prevent sessions from reaching a quota or limit.

Abstract: A messaging entity configured in a memory of first node of a plurality communicatively coupled nodes is disclosed. The nodes are included in a distributed computing system. The messaging entity is configured to operate as a secondary messaging entity in a messaging server for the plurality communicatively coupled nodes. The messaging entity is communicatively couple to a primary messaging entity configured in a memory of a second node of the plurality of nodes. The primary messaging entity is configured to store a message; store a copy of the message. Also, the messaging entity is configured to be promoted to a new primary messaging entity in the event of failure of the primary messaging entity.

Abstract: The present invention extends to methods, systems, and computer program products for load balancing for services. Embodiments of the invention facilitate load balancing between instances of a service based on affinitization of messages, based on content of the message. For example, messages in the same session can be dispatched to the same service instance. A sequence or series of related messages associated with long running and/or stateful services are more likely to be dispatched to the same instance of the service. Thus, if the service instance has persisted client state, there is an increased likely of utilizing the persisted client state and not having another service instance recreate the client state.

Abstract: Multiple software facilities are described. A property mapping facility enables a programming language compiler to map properties defined according to one property accessor style to another property accessor style. A reference mapping facility enables a programming language compiler to emit instructions that cause a parameter to a method to be provided by reference even when the programming language does not support providing parameters by reference. A type extension facility enables a programming language compiler to extend the number of declarative type modifiers that the compiler supports. A partial class facility enables a programming language compiler to postpone compiling a class marked as partial until the compiler can compile the entire class. A value type facility enables a programming language compiler to recognize “value data types” that offer advantages of both reference data types and primitive data types.