Recovering resource connections

A data processing system for recovering resource connections, the data processing system comprising:

• a bus,
• a memory connected to the bus;
• a storage device connected to the bus, wherein the storage device contains computer usable code;
• a communications unit connected to the bus;
• and
• a processing unit connected to the bus, wherein the processing unit executes the computer usable code to provide:
• a first subscriber capable of subscribing to an event of a predefined resource on an application server associated with a managed runtime platform to create a persistent subscription, using an entity bean having container-managed persistence, wherein the persistent subscription including connection information is stored on a server of a managed runtime, implementing connection pooling using a set of resource adapters for connectivity with the server of the managed runtime platform, and wherein the subscribing creates on the server of the managed runtime platform, a first listener for the event to monitor event information related to the application server;
• a receiver capable of receiving, at the first listener, a first notification of the event of an outage associated with the predefined resource indicating the predefined resource on the application server is unavailable, wherein the first notification including information comprising a hostname associated with the predefined resource involved in the event;
• a connector capable of reconnecting to the predefined resource responsive to receiving a second notification of the server of the managed runtime platform, wherein the predefined resource on the application server is available;
• a finder capable of, after receiving the second notification, obtaining subscription information related to the predefined resource from the persistent subscription using the entity bean;
• a generator capable of creating, on the server of the managed runtime platform, a new listener to monitor event information related to the predefined resource on the application server, now available, for receiving new event notifications from the predefined resource, wherein the new listener is capable of receiving event notices from a resource server identified by the hostname;
• and
• a second subscriber capable of re-subscribing to the event of the predefined resource associated with the hostname, by a second subscriber using the subscription information obtained after the outage associated with the predefined resource, without requesting a user to repeat previously issued requests, wherein the first subscriber and the second subscriber are one of a same service performing a same function at different times.

A computer program product for recovering resource connections, the computer program product comprising computer executable program code stored on a non-transitory computer usable recordable type medium, the computer executable program code comprising:

• computer executable program code for subscribing to an event of a predefined resource on an application server associated with a managed runtime platform by a first subscriber to create a persistent subscription, using an entity bean having container-managed persistence, wherein the persistent subscription including connection information is stored on a server of a managed runtime, implementing connection pooling using a set of resource adapters for connectivity with the server of the managed runtime platform, and wherein the subscribing creates on the server of the managed runtime platform, a first listener for the event to monitor event information related to the application server;
• computer executable program code for receiving, at the first listener, a first notification of the event of an outage associated with the predefined resource indicating the predefined resource on the application server is unavailable, wherein the first notification including information comprising a hostname associated with the predefined resource involved in the event;
• computer executable program code for receiving a second notification of the server of the managed runtime platform, reconnecting to the predefined resource, wherein the predefined resource on the application server is available;
• computer executable program code for, after receiving the second notification, obtaining subscription information related to the predefined resource from the persistent subscription using the entity bean;
• computer executable program code for creating, on the server of the managed runtime platform, a new listener to monitor event information related to the predefined resource on the application server, now available, for receiving new event notifications from the predefined resource, wherein the new listener is capable of receiving event notices from a resource server identified by the hostname;
• and
• computer executable program code for re-subscribing to the event of the predefined resource associated with the hostname, by a second subscriber using the subscription information obtained, after the outage associated with the predefined resource, without requesting a user to repeat previously issued requests, wherein the first subscriber and the second subscriber are one of a same service performing a same function at different times.