JP5421715B2 - Information processing apparatus and information processing program - Google Patents

Description

  The present invention relates to a technique for managing software components operating on a virtual machine and improving the stability of the device.

  An OSGi (Open Services Gateway Initiative) framework is known as an open software componentization technology based on the Java (registered trademark) language. The OSGi framework is a framework for managing the dynamic addition, deletion, or execution of software components. For example, by installing the OSGi framework on a device such as a home gateway, it is possible to easily change functions or add functions via a network. A device described in Patent Document 1 is known as a device on which the OSGi framework is mounted.

  FIG. 4 is a block diagram illustrating a configuration of an execution environment of a device in which the OSGi framework is implemented. As shown in the figure, an OSGi framework-implemented device is an OS (Operating System) that provides an interface for handling hardware resources, and Java (registered trademark) bytecode is converted into native code that can operate on the OS. A virtual machine (Java (registered trademark) Virtual Machine: JVM) that executes after conversion is provided, and an OSGi framework is constructed on the JVM. A software component that operates on the OSGi framework is called a bundle. A device in which the OSGi framework is mounted can provide various services by installing and executing a bundle.

  FIG. 5 shows an example of a home gateway implemented with the OSGi framework. A home gateway 100 shown in the figure controls a camera 220A, 220B, 220C arranged in a user's home and transfers an image to a television 210 or the like, an air conditioner 230, an HDD recorder 240, a refrigerator 250, and the like. A home appliance control bundle 120 for controlling home appliances from the outside by using a mobile phone 310 or the like is installed and executed. Both the camera control bundle 110 and the home appliance control bundle 120 are software components that operate on the OSGi framework. The camera control bundle 110 binds the IP address of the LAN side interface 130, receives a request from the television 210, and controls the cameras 220A, 220B, and 220C. The home appliance control bundle 120 binds the IP address of the WAN side interface 140 connected to the network 300 and accepts a request from an outside place, and controls various home appliances connected to the LAN side interface 130.

  As described above, the camera control bundle 110 and the home appliance control bundle 120 shown in FIG. 5 accept requests by binding IP addresses. For this reason, when the IP address of the network interface is changed, the bundle bound with the IP address cannot accept the request. Therefore, as shown in FIG. 4, each bundle has OS-dependent code implemented with native code operable on the OS, and detects changes in the state of hardware resources such as a change in the IP address of the network interface. .

JP 2009-200803 A

  However, since the CPU mounted on a device such as a home gateway has a lower specification than the CPU mounted on the personal computer, each bundle individually accesses the OS directly, thereby reducing the load on the OS. There is a problem that the stability increases due to the increase. For example, when the OS notifies each bundle that the network of the home gateway has been disconnected, it is necessary to notify the number of bundles to be notified. If the number of bundles increases, the communication between the OS and the bundle (processing at the normal time / processing at the time of error, etc.) increases accordingly, and the OS tends to become unstable.

  In Patent Document 1, a bundle uses an OS-dependent function using a native code service that implements various functions commonly used by a plurality of bundles, but the native code service operates directly on the OS. As the number of bundles using the native code service increases, it is assumed that the operation of the OS becomes unstable.

  The present invention has been made in view of the above, and an object of the present invention is to reduce the load on the OS and improve the stability of a device in a device on which a plurality of software components operate.

An information processing apparatus according to a first aspect of the present invention is an operating system that provides an interface for handling hardware resources, and that operates on the operating system and converts intermediate code into native code operable on the operating system. A virtual machine to be executed, and first and second bundles operating on the virtual machine, the first bundle having access means for accepting external access via a network interface managed by the operating system; has a registration request means for requesting the registration of the first bundle in the second bundle receives a notification from the second bundle, the notification receiving means for corresponding access unit to changing network interfaces, the The second bundle receives a registration request from the first bundle. Registration means for registering the first bundle to the list, a detection means for detecting a state change of the network interface using the interface provided by the operating system, when the detecting means detects the state change of the network interface And a notification unit that refers to the list and transmits a notification to the first bundle registered in the list.

An information processing program according to a second aspect of the present invention is an operating system that provides an interface for handling hardware resources, and operates on the operating system, and converts intermediate code into native code that can operate on the operating system. An information processing program that operates on a virtual machine of an information processing apparatus having a virtual machine to be executed, and that receives the registration request from another information processing program that operates on the virtual machine, The process of registering the network interface , the process of detecting the change in the state of the network interface managed by the operating system using the interface provided by the operating system , and the list when the change in the state of the network interface is detected Squirrel A process of transmitting a notification to another information processing program is registered, the characterized in that to be executed by the information processing apparatus.

An information processing program according to a third aspect of the present invention is an operating system that provides an interface for handling hardware resources, an operating system that operates on the operating system, and converts intermediate code into native code that can operate on the operating system. An information processing program that operates on a virtual machine of an information processing apparatus having a virtual machine to execute, and that accepts external access via a network interface managed by the operating system a process of requesting the registration to another information processing program to be notified detects, receives a notification from another information processing program, the process of accepting the access and processing to respond to changes in the network interface, to an information processing apparatus Characterized in that to the row.

  According to the present invention, it is possible to reduce the OS load and improve the stability of a device in a device on which a plurality of software components operate.

It is a block diagram which shows the structure of the execution environment of the information processing apparatus in this Embodiment. It is a flowchart which shows the flow of a process in which the management bundle of the said information processing apparatus registers an application bundle. It is a flowchart which shows the flow of the process which the management bundle of the said information processing apparatus notifies to an application bundle. It is a block diagram which shows the structure of the execution environment of the apparatus which mounted the conventional OSGi framework. It is the schematic which shows the example of operation | movement of the home gateway which mounted OSGi framework.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram illustrating a configuration of an execution environment of an information processing apparatus in which the OSGi framework according to the present embodiment is implemented. The information processing apparatus 1 illustrated in FIG. 1 includes an OS 11, a JVM 12, and an OSGi framework 13, and a management bundle 2 and a plurality of application bundles 3 </ b> A and 3 </ b> B operate on the OSGi framework 13. The information processing device 1 is configured by a computer including an arithmetic processing device, a storage device, a memory, and the like, and a program that causes the execution environment illustrated in FIG. 1 to function is stored in the storage device provided in the information processing device 1. Each unit is processed by causing the arithmetic processing unit to execute this program. The management bundle 2 and the application bundles 3A and 3B are software components that operate on the OSGi framework 13, and this software component also provides recording on a recording medium such as a magnetic disk, an optical disk, and a semiconductor memory through a network. It is also possible.

  The OS 11 provides an interface for handling hardware resources such as an input / output function, memory management, task scheduling, and a network interface. Typical examples include Linux (registered trademark) and VxWorks (registered trademark).

  The JVM 12 is a virtual machine that executes a Java (registered trademark) bytecode by converting it into a native code operable on the OS 11, and is activated by the OS 11. Java (registered trademark) bytecode is intermediate code that does not depend on a specific hardware environment.

  The OSGi framework 13 is built on the JVM 12 and operates software components called bundles. In the embodiment shown in FIG. 1, a management bundle 2 and a plurality of application bundles 3A and 3B are operating.

  The management bundle 2 is sent to a registration unit 21 that receives registration requests from the application bundles 3A and 3B, a holding unit 22 that holds a list of application bundles 3A and 3B to which a notification is to be transmitted, and application bundles 3A and 3B registered in the list. A notification unit 23 for notification and an OS-dependent code 24 for detecting a change in the state of hardware resources using an interface provided by the OS 11 are provided. The management bundle 2 in the present embodiment detects a network interface state change as a hardware resource state change, and notifies the application bundles 3A and 3B when the network interface state changes. To do. Examples of the state change of the network interface include connection to the network, disconnection from the network, or change of the IP address assigned to the network interface. Notification to the application bundles 3A and 3B is performed by calling back with a Java (registered trademark) API (Application Program Interface).

  The application bundles 3A and 3B include registration request units 31A and 31B and notification reception units 32A and 32B. The application bundles 3A and 3B do not directly access the OS 11, but register the application bundles 3A and 3B themselves in the management bundle 2 by the registration requesting units 31A and 31B, and the predetermined hardware by the notification receiving units 32A and 32B. Accept notifications of resource state changes. This eliminates the need for the application bundles 3A and 3B to implement native code operable on the OS for detecting changes in the state of hardware resources.

  Next, a process in which the management bundle 2 registers the application bundles 3A and 3B in the list will be described.

  FIG. 2 is a flowchart showing the flow of registration processing by the management bundle 2. First, when the registration request units 31A and 31B of the application bundles 3A and 3B request registration to the management bundle 2, the registration unit 21 of the management bundle 2 accepts the request (step S11). When the application bundles 3A and 3B request registration, a network interface or session for monitoring a change in state may be designated. For example, when the application bundles 3A and 3B bind an IP address assigned to a session having a network interface on the WAN side and accept access from the outside, a notification is given when the communication state of the session is changed. Is specified.

  The management bundle 2 that has received the request registers the requested application bundles 3A and 3B in the list held by the holding unit 22 (step S12). The list may hold not only the application bundles 3A and 3B to be notified but also information such as monitoring target sessions in association with each other.

  Next, a process in which the management bundle 2 notifies the application bundles 3A and 3B will be described.

  FIG. 3 is a flowchart showing the flow of notification processing by the management bundle 2.

  The OS dependent code 24 monitors the network interface and detects a change in the state of the network interface, such as a change in the IP address, for example (step S21).

  When detecting a change in the state of the network interface, the notification unit 23 reads the list from the holding unit 22 and notifies the application bundles 3A and 3B registered in the list (step S22). The contents notified by the notification unit 23 to the application bundles 3A and 3B include, for example, the type of network interface (LAN side, WAN side), session identifier, connection state (connected or disconnected), IP address, and the like.

  The application bundles 3A and 3B that have received the notification perform processing necessary for each of the application bundles 3A and 3B, such as binding a new IP address.

  In the present embodiment, the management bundle 2 that monitors the network interface has been described. However, the present invention is not limited to this. For example, the setting of the information processing apparatus 1 or the state of an external device connected to the information processing apparatus 1 It may be a management bundle that monitors the state of hardware resources depending on the OS 11 and cannot be detected only by the function provided by the JVM 12. The number of management bundles that operate on the OSGi framework 13 is not limited to one, and a plurality of management bundles that monitor the status of different hardware resources may operate.

  As described above, according to the present embodiment, the management bundle 2 having the OS-dependent code 24 receives registration of the application bundles 3A and 3B and registers it in the list of the holding unit 22, and the network interface state from the OS 11 When the notification of the change is received, the communication between the OS 11 and the bundle can be minimized by notifying the application bundles 3A and 3B registered in the list. The stability of the device 1 can be improved.

  Further, since the application bundles 3A and 3B do not need to mount the OS dependent code 24, it is not necessary to mount different OSs. In general, the OS-dependent implementation is more difficult than Java (registered trademark) programming, so that the OS-dependent code is not required, and the development of the application bundles 3A and 3B is facilitated. By providing the management bundle 2 by the manufacturer of the information processing apparatus 1, it becomes easy to develop application bundles 3 </ b> A and 3 </ b> B by a third party, and various services can be introduced into the information processing apparatus 1.

  Furthermore, not only the application bundles 3A and 3B but also the management bundle 2 having the OS-dependent code 24 is operated on the OSGi framework 13, so that the management bundle 2 can be dynamically managed by the framework of the OSGi framework 13. it can.

1 ... Information processing device 11 ... OS
12 ... JVM
DESCRIPTION OF SYMBOLS 13 ... OSGi framework 2 ... Management bundle 21 ... Registration part 22 ... Holding part 23 ... Notification part 24 ... OS dependence code 3A, 3B ... Application bundle 31A, 31B ... Registration request part 32A, 32B ... Notification receiving part 100 ... Home gateway DESCRIPTION OF SYMBOLS 110 ... Camera control bundle 120 ... Home appliance control bundle 130 ... LAN side interface 140 ... WAN side interface 210 ... Television 220A, 220B, 220C ... Camera 230 ... Air conditioner 240 ... HDD recorder 250 ... Refrigerator 300 ... Network 310 ... Mobile phone

Claims (3)

An operating system that provides an interface for handling hardware resources;
A virtual machine that runs on the operating system, converts intermediate code into native code that can run on the operating system, and
And first and second bundles operating on the virtual machine,
The first bundle is
Access means for accepting external access via a network interface managed by the operating system;
Registration request means for requesting the second bundle to register the first bundle;
Receiving a notification from the second bundle, and a notification receiving means for causing the access means to respond to a change in the network interface ,
The second bundle is
Registration means for receiving a registration request from the first bundle and registering the first bundle in a list;
Detecting means for detecting a change in state of the network interface using an interface provided by the operating system;
And a notification means for referring to the list and transmitting a notification to the first bundle registered in the list when the detection means detects a change in the state of the network interface. Information processing apparatus. Information processing comprising: an operating system that provides an interface for handling hardware resources; and a virtual machine that runs on the operating system and converts intermediate code into native code that can run on the operating system An information processing program that operates on the virtual machine of an apparatus,
Processing for receiving a registration request from another information processing program operating on the virtual machine and registering the other information processing program in a list;
A process for detecting a change in a state of a network interface managed by the operating system using an interface provided by the operating system ;
When detecting a change in the state of the network interface , a process of referring to the list and transmitting a notification to the other information processing program registered in the list;
An information processing program for causing the information processing apparatus to execute. Information processing comprising: an operating system that provides an interface for handling hardware resources; and a virtual machine that runs on the operating system and converts intermediate code into native code that can run on the operating system An information processing program that operates on the virtual machine of an apparatus,
Processing for accepting external access via a network interface managed by the operating system;
Processing to request registration to another information processing program that detects and notifies a change in the state of the network interface ;
A process of receiving a notification from the another information processing program, and a process of accepting the access corresponding to a change in the network interface ;
An information processing program for causing the information processing apparatus to execute.

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