DE102006028012A1 - Method for operating an application frame and a corresponding database - Google Patents

Abstract

at a method for operating an application frame (100), the Manages multiple bundles, with one bundle different from other bundles Services provided by service objects (1) and the services become suspendable upon the release of storage capacity are proposed to improve performance that the service objects (1) are complemented by proxy objects (2) and thereby be removed. Furthermore, a correspondingly formed database is specified.

Description

Technical area

The invention relates to a method for operating an application frame, which manages several bundles, wherein a bundle of different bundles different services, which by service objects ( 1 ), and the services for releasing storage capacities are suspendable and a correspondingly formed database.

State of the art

Open Standards for so-called application frames are becoming increasingly important. An application frame provides a standardized environment for the management and execution of Programs, so-called applications. The applications have prescribed interfaces over which the application frame manages the applications and provides them to the user. The application frame provides a number of service functions available which can be used by the applications. The functions include e.g. Mechanisms for configuration, life cycle and user management. The application framework may be platform independent, i. it runs e.g. in a Java runtime environment, dynamically configurable, and software components dynamically expandable. He can also use electronic components communicate with the system. It can do this Java-based components or other modules that come with it Dedicated drivers are addressed, act. An open application frame for the Home and Telematics is currently being developed by OSGi (Open Service Gateway initiative) standardized.

The The invention described below is the example of such OSGi system described; However, it is related to everyone Applicable frame applicable, i. it is not on application frame set to OSGi.

One OSGi system is a Java application framework within which various individual Java applications, so-called bundles with each other communicate and expire. These bundles are jar files (Java archive), which meet a certain predetermined form to to be managed by the frame work. Central is the provision of interfaces to be set as part of a lifecycle management conditions take. The most important of these are installed, uninstalled, resolved and active. Communication between bundles happens by a bundle A services (services) on the framework or application framework logs in and a bundle B requests it from the framework and avails it takes.

Usually becomes an offered service directly upon registration of the bundle logged on to the framework and stays the same throughout the life of the OSGi system available. The bundle object remains the same provides this service over instantiates the entire time and occupies space (e.g., heap).

at a variety of services offered, not all at the same time However, the memory must be kept available for all bundles even if they are not currently used.

The Mechanisms offered by the framework, a non-use bundle to remove the service so that its free space can be run on a complete uninstallation of the bundle addition, which is accompanied by a deregistration of the service.

Explanation of the invention

outgoing From this prior art, the invention is based on the object to create a process with which much of the bundle resources temporarily can be released so over free storage capacity to dispose of. Furthermore, a suitably trained database is specified become.

These Tasks are solved by the features of claims 1 and 9.

Of the The core idea of the invention is that the various Services of a bundle no longer directly via suitable interfaces with other bundles in connection or exchange data, but that a slim proxy object is interposed. The service is logged on to the application frame in the form of this proxy object. Thus, the actual service can only be reached via this proxy object. The proxy object contains to all interfaces of the service. In addition contains the proxy object on the one hand an interface to the service to be connected in one Suspend or hibernate and restore the service object again to give free. On the other hand contains it preferably designed by software Mechanisms to restore the service when needed. there is preferably in the last, stored state of the service of this continued. Furthermore, additional interfaces are provided at the service, a backup of the currently relevant states, as well as a restore enable the same.

The proxy object has the same Interfaces such as the service to be connected itself and thus can be registered instead of the original service on the application frame. Furthermore, the proxy object contains a reference or a reference to the actual service object.

Should The service is claimed in the proxy object first a query as to whether the corresponding service object exists, where an instantiation described below is called as well with previous suspension the original state of the service can be restored.

Should the service is suspended, its status is in the proxy object stored locally. The proxy object puts the service object in the resting state. The proxy object does not report the service, but instead Hold him for the remaining system upright. This is done after its status is saved has been. If necessary, unnecessary data also deleted or the service object completely be removed.

On the interfaces of the service is exclusively via the same-named interfaces of the proxy object. The Service object can be used to suspend the service and share the service claimed resources submit their state to the proxy object, later to be restored.

Of the Advantage of the invention is that no additional Hard disk space is needed to outsource currently unnecessary services, for example, in a swap process. Farther the application frame is not with the maintenance or Operating from currently not needed Services, so that a processing and / or transmission capacity is not unnecessarily stressed becomes.

A appropriately trained database or one with a corresponding Software program provided computer has according to claim 9 for the execution of Procedure over a device with the proxy objects described above can be generated as an interface between the application framework and various services to serve a bundle. It can the proxy objects either hardware and / or software in the Database or computer.

Around speed up the recall of a suspended service or if the service is suspended and restored and the service object is removed and again instantiated / generated, can the associated Service object according to claim 2 in a lower thread priority to be instantiated. If instantiation is not already prepared Restoring a suspended service can be easy too delays to lead, especially if this is done after a user input. This can be done as follows For example, when calling a menu it is likely that one of the menu items will be called shortly below so that the corresponding services of each menu item are prepared for it should be restored. This can be done in the background Low priority thread started to prepare for the instantiation of the service object. in the Ideal case, for example when the corresponding menu item is called is the corresponding service object is already restored, making it seamless can expire. A user in this case has a temporary Suspension of the service noticed nothing.

If the corresponding service object has not yet been restored should be, according to claim 3, the priority of the associated thread to increase the recovery of the service object to accelerate.

Preferably is a current resource allocation, as characterized in claim 4, by monitors a so-called manager of the application framework. This identifies one based on the current resource allocation Need for additional Main memory. At the same time, those services that are indeed but rarely and / or not used at all, identified. These services are listed below in the associated proxy objects Suspend the services. With the manager can also a anticipating the imminent use of a suspended service for example, when a corresponding menu is called becomes. Thus, the restoration of the associated service objects can be triggered in advance. As well the manager can realize a persistent storage of service states. Thus, a service state can be over get an application frame restart. For this is just an extension of the interface in the proxy object necessary, with an exchange of state between the proxy object and the manager possible is. The manager is for this hardware and / or software in one Database or an application framework implemented.

It It is understood that within the scope of the invention, any application frame designed according to the invention could be. However, these are preferably, as described in claim 5, application frame according to the OSGi standard already described above.

to Accelerating the startup of a computer system with a appropriate application frame is provided is in the claim 6 suggested that when starting the system the proxy objects be instantiated instead of the service objects. This requires significantly less computation and storage capacity. Also, the proxy objects are registered as service providers in the system. The service object itself or the service is located in the so-called Suspend state and is called only when through the interface proxy object a request is made. However, it is unavoidable there will be a delay on any service call can, for example, because the service must first be instantiated.

For this can, as indicated in claim 7, the associated thread of the service object already during system startup, for example one OSGi system, done at the start of the bundle. This happens again with low priority, as far as possible for the further starting process little to influence.

alternative can according to claim 8, the starting of the thread only after the application frame was started and all proxy objects with their services are logged on the application frame made become.

Brief description of the drawing

A embodiment The invention is explained below with reference to the drawing. It shows in a purely schematic representation:

1 a block diagram of an application frame.

In 1 is an application framework 100 shown schematically. By appropriately configured interfaces, as indicated by the connecting lines, the application frame is 100 with several services realized by the service objects 1 , each associated with one or more bundles. These service objects 1 typically require a large amount of computational and memory capacity when they are in the activated state. To reduce the required computing capacity unnecessary service objects 1 also be disabled or suspended.

According to the invention is now between the service objects 1 and the application frame 100 one proxy object each 2 interposed, via an appropriate interface with the service objects 2 communicates. The service is over the proxy object 2 logged on to the application frame. In doing so, the service objects 1 be suspended and are instantiated in the case only if the associated proxy object 2 a corresponding call is made. Because the proxy objects 2 are significantly slimmer, or claim less storage capacity, the computing capacity of the entire system or a correspondingly formed database or a computer is much less burdened. To restore the service 1 or a service object are in the proxy objects 2 corresponding mechanisms hardware and / or software implemented.

In addition, a manager needs 3 be provided, for example, in the application frames 100 is integrated to monitor resource usage and, in particular, unneeded services 1 to suspend.

Claims (9)

Method for operating an application frame ( 100 ), which manages multiple bundles, one bundle of other bundles providing different services through service objects ( 1 ), and the services for releasing storage capacities are suspendable, characterized in that the service objects ( 1 ) by proxy objects ( 2 ) and can be removed. A method according to claim 1, characterized in that for restoring a suspended or non-existent service the service object ( 1 ) is instantiated in a low priority thread. Method according to claim 2, characterized in that that the priority of the thread is raised. Method according to one of claims 1 to 3, characterized in that a manager ( 3 ) monitors an up-to-date resource allocation. Method according to one of claims 1 to 4, characterized in that the application frame ( 100 ) is operated in an OSGi system. Method according to one of claims 1 to 5, characterized in that when starting a system, the proxy objects ( 2 ) to be instantiated. A method according to claim 6, characterized in that a thread for instantiating a service object ( 2 ) is started in the course of starting a system. A method according to claim 6, characterized in that the thread only after the login of all proxy objects ( 2 ) on the application frame ( 100 ) is started. Database with an application frame ( 100 ), which manages multiple bundles, one bundle of other bundles providing different services through service objects ( 1 ), and the services for releasing storage capacities are suspendable, characterized in that the service objects ( 1 ) by proxy objects ( 2 ) and thereby removable.