Abstract: Embodiments of the invention relate to message queuing. In one embodiment, a request from an application for retrieving a message from a queue is received. The queue is stored across multiple nodes of a distributed storage system. A preference with respect to message order and message duplication associated with the queue is identified. A message sequence index associated with the queue is sampled based on the preference that has been identified. The message is selected in response to the sampling. The message that has been selected is made unavailable to other applications for a given interval of time, while maintaining the message in the queue. The message is sent to the application.

Abstract: A method for association of a mobile terminal with an access point (AP) includes determining a set of available APs. The AP from among the available APs that has the coverage area that is likely to encompass the mobile terminal for the greatest period of time or distance is selected. The selected AP is associated with the mobile terminal.

Abstract: Techniques for transmitting data according to at least one quality of service requirement. A message path is calculated specifying a sequence of broker computers selected from a network of interconnected broker computers. The message path is statistically estimated to fulfill the at least one quality of service requirement. Quality of service metrics are received about the network of interconnected broker computers. If the message path is determined not to fulfill the quality of service requirement, a new message path is calculated specifying a new sequence of broker computers selected from the network of interconnected broker computers. The new message path is statistically estimated to fulfill the at least one quality of service requirement.

Abstract: A method, an apparatus and an article of manufacture for providing queuing semantics in a distributed queuing service while maintaining service scalability. The method includes supporting at least one of an en-queue and a de-queue operation of one or more queued messages in a non-guaranteed order, maintaining the ordering of the one or more queued messages, and routing an en-queue operation to a persistent queue server and a de-queue operation to a cache manager in the maintained ordering of the one or more queued messages to provide queuing semantics in a distributed queuing service while maintaining service scalability.

Abstract: Embodiments of the invention relate to message queuing. In one embodiment, a request from an application for retrieving a message from a queue is received. The queue is stored across multiple nodes of a distributed storage system. A preference with respect to message order and message duplication associated with the queue is identified. A message sequence index associated with the queue is sampled based on the preference that has been identified. The message is selected in response to the sampling. The message that has been selected is made unavailable to other applications for a given interval of time, while maintaining the message in the queue. The message is sent to the application.

Abstract: A system and method are disclosed for an elastic and scalable publish/subscribe scheme. Subscription information is received at a dispatcher node. A plurality of matching nodes is selected in an overlay network to store the subscription information on a computer readable storage medium. Upon receiving an event at a dispatching node, at least one of the matching nodes with the stored subscription information is selected to process the event.

Abstract: A mechanism for declarative service domain federation uses a declarative approach to both the visibility aspect and the management aspect of service domain federation. Instead of manually exporting services, that is, selecting individual services from source domains to be visible in the target domain, using the present system, a federation architect uses a federation console to specify federation intent. The federation intent may include federation rule, query-based service group, and quality-of-service (QoS) policy. Based on the declared federation intent, a planning engine resolves the individual services based on the group query, generates the service visibility configuration, and creates the necessary service proxies and/or mediation objects to satisfy the goal. At runtime, a service monitor collects the performance metrics of federated services and dynamically adjusts the mediation/proxy configurations to maintain the QoS objectives specified by the federation architect.

Abstract: A method, device, and computer program product are provided for automatically generating connectivity configuration between domains by a device. A rule is received by the device. The rule is read by the device to determine a first domain invoking a service, a second domain having the service, and connectivity requirements for the first and second domains. A first proxy and a second proxy are automatically determined to fulfill the rule by the device. The first proxy is automatically assigned to the first domain and the second proxy is automatically assigned to the second domain.

Abstract: A system and method are disclosed for an elastic and scalable publish/subscribe scheme. Subscription information is received at a dispatcher node. A plurality of matching nodes are selected in an overlay network to store the subscription information on a computer readable storage medium. Upon receiving an event at a dispatching node, at least one of the matching nodes with the stored subscription information is selected to process the event.

Abstract: A system may include an overlay network linking a plurality of publishers, a plurality of subscribers, and a plurality of brokers. The overlay network may include a first computer network having a first network protocol carried by a second computer network having a second network protocol. The system may also include an agent carried by each of the publishers, the subscribers, and the brokers that adjust the network's topology based upon collected runtime data of condition of each link within the network and/or broker availability to any publisher and subscriber.

Abstract: A method, device, and computer program product are provided for automatically generating connectivity configuration between domains by a device. A rule is received by the device. The rule is read by the device to determine a first domain invoking a service, a second domain having the service, and connectivity requirements for the first and second domains. A first proxy and a second proxy are automatically determined to fulfill the rule by the device. The first proxy is automatically assigned to the first domain and the second proxy is automatically assigned to the second domain.

Abstract: Techniques for transmitting data according to at least one quality of service requirement. A message path is calculated specifying a sequence of broker computers selected from a network of interconnected broker computers. The message path is statistically estimated to fulfill the at least one quality of service requirement. Quality of service metrics are received about the network of interconnected broker computers. If the message path is determined not to fulfill the quality of service requirement, a new message path is calculated specifying a new sequence of broker computers selected from the network of interconnected broker computers. The new message path is statistically estimated to fulfill the at least one quality of service requirement.

Abstract: A method for association of a mobile terminal with an access point (AP) includes determining a set of available APs. The AP from among the available APs that has the coverage area that is likely to encompass the mobile terminal for the greatest period of time or distance is selected. The selected AP is associated with the mobile terminal.