15. A computer program product to implement real-time communication for resource content, comprising: a computer readable storage medium having computer readable program code embodied therewith, the computer readable program code comprising: computer readable program code configured to receive, from a subscriber device, identification information of the subscriber device and an event topic, wherein the identification information comprises path information defining a topic path for receiving a notification event related to the selected event topic and the event topic selected by the subscriber device is a complex event topic set constituted by at least two separate event topics; computer readable program code configured to add the identification information of the subscriber device and the selected event topic to an event topic subscription search table; computer readable program code configured to determine, by the resource content publishing device, if new resource content is available, whether an event topic of the new resource content belongs to the complex event topic set; computer readable program code configured to create, by the resource content publishing device, if it is determined that the event topic of the new resource content belongs to the complex event topic set, a complex event by applying a predefined rule describing a relation between the separate events related to the complex event topic set onto the new resource content, so as to send the complex event to the subscriber device after obtaining the identification information of the subscriber device; computer readable program code configured to obtain, by the resource content publishing device, the identification information of a subscriber device subscribing to an event topic related to new resource content, where the identification information is obtained from the event topic subscription search table, if new resource content is available; and computer readable program code configured to send, by the resource content publishing device, a notification event comprising the new resource content to the subscriber device according to the identification information of the subscriber device.
15. A computer program product to implement real-time communication for resource content, comprising: a computer readable storage medium having computer readable program code embodied therewith, the computer readable program code comprising: computer readable program code configured to receive, from a subscriber device, identification information of the subscriber device and an event topic, wherein the identification information comprises path information defining a topic path for receiving a notification event related to the selected event topic and the event topic selected by the subscriber device is a complex event topic set constituted by at least two separate event topics; computer readable program code configured to add the identification information of the subscriber device and the selected event topic to an event topic subscription search table; computer readable program code configured to determine, by the resource content publishing device, if new resource content is available, whether an event topic of the new resource content belongs to the complex event topic set; computer readable program code configured to create, by the resource content publishing device, if it is determined that the event topic of the new resource content belongs to the complex event topic set, a complex event by applying a predefined rule describing a relation between the separate events related to the complex event topic set onto the new resource content, so as to send the complex event to the subscriber device after obtaining the identification information of the subscriber device; computer readable program code configured to obtain, by the resource content publishing device, the identification information of a subscriber device subscribing to an event topic related to new resource content, where the identification information is obtained from the event topic subscription search table, if new resource content is available; and computer readable program code configured to send, by the resource content publishing device, a notification event comprising the new resource content to the subscriber device according to the identification information of the subscriber device. 16. The computer program product according to claim 15 , further comprising: computer readable program code configured to create a corresponding topic path for receiving a reversed event related to the event topic at the resource content publishing device, a path name of which is the same as that of the topic path of the subscriber device for receiving a notification event related to the same event topic; and computer readable program code configured to receive, by the resource content publishing device, a reversed event that was sent by the subscriber device according to a Web address of the resource content publishing device and corresponding topic path information, where the reversed event, created by the subscriber device, comprises reversed event content edited by the subscriber device.