WO2009129745A1

WO2009129745A1 - A method and apparatus for interface invoking of distributed system

Info

Publication number: WO2009129745A1
Application number: PCT/CN2009/071422
Authority: WO
Inventors: 李立达
Original assignee: 华为技术有限公司
Priority date: 2008-04-24
Filing date: 2009-04-23
Publication date: 2009-10-29
Also published as: CN101277301A; CN101277301B

Abstract

A method and apparatus for interface invoking of distributed system. The method includes: receiving the interface invoking request message sent by the client; judging whether or not a value of the interface description language (IDL) default parameter is contained in the interface invoking request message, and if not contained, acquiring the default value of the IDL default parameter from the pre-stored information; and invoking the interface that the client requests by using the default value of the acquired IDL default parameter. Besides, an apparatus for interface invoking of distributed system is provided by the embodiments of the invention. In the embodiments of the invention, by using the pre-stored IDL default value to invoke interface for the old client that does not contain the value of the IDL default parameter, the old client that has not updated can also be compatible after the system updates, therefore the associated updating of all the components in the whole distributed system that is caused by the updating of the server end can be avoided, and the light-grade component updating can be realized.

Description

Interface calling method and device for distributed system

The present application claims priority to Chinese Patent Application No. 200810094643.1, entitled "Interface Calling Method and Apparatus for Distributed Systems", filed on April 24, 2008, the entire contents of which are incorporated herein by reference. In the application.

Technical field

The present invention relates to the field of communications technologies, and in particular, to an interface calling method and apparatus for a distributed system.

Background technique

A distributed system enables clients in the system to use remote services like local servers, with the advantages of incremental scalability, resource sharing, and so on. At present, most of the distributed systems describe the interfaces between the components in the distributed system through the Interface Description Language (IDL), and call the corresponding functions (Functions) of the components through the interfaces to implement the corresponding functions. To support component upgrades, new interfaces are typically generated in the system for newly upgraded components. In the prior art, when a component is upgraded, a new interface corresponding to the new component is generated, and the new interface needs to be described using IDL. Since the upgraded component usually inherits the old features while having new functions, the new interface corresponding to the component inherits the original functions of the old interface and also gives new functions. Therefore, the existing interface calling method of a distributed system is that a new client calls a new interface, and an old client calls an old interface.

However, in carrying out the creation process of the present invention, the inventors found that at least the following problems exist in the prior art:

Since the newly added interface is an enhancement of the function of the original old interface, when the IDL is used to describe the new interface, the processing is inconvenient due to the redundancy of the code defining the new interface, which makes the maintenance inconvenient. And it will make the system upgrade a lot of work.

Summary of the invention

It is an object of embodiments of the present invention to provide an interface calling method and apparatus for a distributed system to reduce the workload of system upgrade.

An interface calling method for a distributed system, the method comprising:

Receiving an interface call request message sent by the client;

Determining whether the interface call request message includes the number of interface description language IDL default parameters The value, if not included, obtains a default value of the IDL default parameter from the pre-stored information; invokes the interface requested by the client using the default value of the obtained IDL default parameter.

An apparatus for an interface call of a distributed system, the apparatus comprising:

a receiving unit, configured to receive an interface call request message sent by the client;

a default value obtaining unit, configured to not include in an interface call request message in the receiving unit

When the value of the IDL default parameter is used, the default value of the IDL default parameter is obtained from the pre-stored information;

The first calling interface unit is configured to invoke the interface requested by the client by using a default value of an IDL default parameter obtained by the default value obtaining unit.

A distributed system, the system includes: a server that communicates with a client, the server, configured to receive an interface call request message from the client, when the interface call request message does not include an IDL default parameter When the value is obtained, the default value of the IDL default parameter is obtained from the pre-stored information, and the interface requested by the client is invoked by using the default value of the obtained IDL default parameter.

Compared with the prior art, the embodiment of the invention has the following advantages:

The embodiment of the present invention can perform the corresponding interface calling operation according to whether the request message includes the value of the IDL default parameter according to the received interface of the client, so that when the server is upgraded, it is not necessary to upgrade all the clients, but for the old client. Because there is no upgrade, the interface call request message sent will not contain the value of the IDL default parameter. In this case, the IDL default value can be obtained from the pre-stored information to perform the interface call. It can be seen that, by using the interface calling method disclosed in the present invention, linkage upgrade of all components in the entire distributed system caused by server-side upgrade can be avoided.

DRAWINGS

1 is a schematic block diagram of a method for calling an interface of a distributed system according to an embodiment of the present invention;

2(a), (b), and (c) are schematic diagrams showing the application of the method shown in FIG. 1 for a distributed system according to an embodiment of the present invention;

3 is a schematic block diagram of an interface call device of a distributed system according to an embodiment of the present invention; FIG. 4 is a schematic block diagram of another interface call device of a distributed system according to an embodiment of the present invention; FIG. 5 is another embodiment of the present invention. A schematic block diagram of an interface call device of a distributed system. detailed description The specific embodiments of the embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

In the prior art, since the newly added interface is an enhancement of the function of the original old interface, when the IDL is used to describe the new interface, the code defined for the new interface needs to have a large number of defined codes identical to the old interface. The code redundancy that defines the new interface can be cumbersome to handle and inconvenient to maintain. Moreover, if the software on the server side is upgraded, the software of the client side should also be upgraded together, so that the client can invoke the interface according to the agreed method of the server side. Therefore, the prior art will increase the workload of the system upgrade.

An embodiment of the present invention discloses an interface calling method of a distributed system. In this embodiment, an IDL is used to define an interface, and an identifier of a method parameter is added in the upgraded interface definition IDL, so that the client is received. When the sent interface invokes the request message, it can determine whether the client is an upgraded new client according to whether the received interface in the request message contains the value of the IDL default parameter. FIG. 1 is a schematic block diagram of a method for calling an interface of a distributed system according to an embodiment of the present invention.

S101: When the program of the interface calling method is defined by using the IDL language, a default parameter and a default value of the default parameter are set for the method parameter in the program, and "other values other than the default value can be specified for the default parameter" In this way, when the upgraded new client calls this method, you can set a value other than the default value for the IDL default parameter.

For example, in the definition of the doRequest method, a parameter default setting has been added: interface IBaseSession {

Void doRequest(in TXCAPMessage req, in string address ="");

Oneway void doResponse(in TXCAPMessage resp);

Oneway void close();

Oneway void doError (in short errorCode); where "address=" is a default parameter set in the embodiment of the present invention, and the value of the default parameter may be a specified default value, or may be a value arbitrarily set by the client. When it is the default value, the value of the default parameter may not be added, and it is expressed as a silent value.

When the IDL compiler compiles the IDL language with default parameters, the default value of the default parameters can be saved in the server-side skeleton (the server skeleton generated by the IDL compiler). S102: After receiving the interface call request message sent by the client, the server reads the value of the default parameter in each IDL language from the interface call request message. If the default parameter does not have a specified value, execute S103; otherwise, Execution S106.

S103: The server determines whether the default value of the IDL default parameter is saved in the skeleton on itself, if not, executes S104; otherwise, executes S105.

S104: The call fails, and an abnormal response is returned to the client.

S105: The client is an old client that has not been upgraded. In this case, the default value of the IDL default parameter saved by itself is used to invoke the interface requested by the client to implement the corresponding application through the function defined by the interface.

S106: The client is an upgraded new client. In this case, the interface used by the client request is invoked by using the value of the IDL default parameter in the interface call request message.

In the above embodiment, since the default parameter and the default value are set in the IDL, if the value of the IDL default parameter is specified in the interface call request message sent by the client, the client is the upgraded new client. At this time, the server uses the value specified in the interface call request message to call the corresponding interface to implement the subsequent operation; if the default parameter of the interface call request message does not have the specified IDL default value, then the default value of the IDL default parameter is in the server. If there is a save, then the client is an old client that has not been upgraded. At this time, the server uses the default value to call the required interface. It can be seen that the present invention realizes the distinguishing operation between the new client and the old client by identifying the value of the IDL default parameter, and avoids the problem of the client linkage upgrade caused by the server-side system upgrade in the prior art, and the system upgrades in the system. When you do not need to upgrade the old client program. Therefore, the linkage upgrade of the system components is overcome, the system upgrade operation is simple, the maintenance is convenient, and the lightweight component upgrade is realized.

In addition, the embodiment of the present invention uses the way of adding default parameters to the old interface to implement the calling of the upgraded component, and does not need to add a new interface, thereby avoiding the cumbersome processing caused by the code redundancy of the new interface during the call. Easy to maintain.

For the sake of understanding, the specific application of the above-mentioned interface calling method in the embodiment of the present invention is illustrated by the distributed system. As shown in FIG. 2, it is a schematic diagram of the application of the method in FIG. 1 according to an embodiment of the present invention. If the client A and the client ^ and the server C both use the method of Fun ( a, b ) to call the interface before the upgrade, for example, as shown in Figure 2 ( a ), the request sent by client A includes Fun ( 1 , 2 ). , client B sends The request includes Fun ( 3 , 4 ). Server C calls the interface of the method with the parameter values 1 and 2 according to the request of client A. At the same time, according to the request of client B, the interface of the method is called with the parameter values 3 and 4.

When the server C is upgraded, the default parameter c is defined for the method on the server C and the default value of the default parameter c is set to 10, that is, Fun(a, b, c=10). As shown in Figure 2 (b), if the request sent by client A includes Fun (1, 2), the request sent by client B includes Fun (3, 4), and after receiving the requests, server C receives The values of the default parameters are respectively queried in these requests. Since the values of the default parameter c are not specified in the requests of client A and client B, it means that both clients are old clients without upgrade, and the server is now End C retrieves the default value of the default parameter c from the information saved by itself. When retrieved (ie, the default value is 10), the default value of 10 and other parameter values 1 and 2 in the request are used according to the request of client A. To invoke the method interface; at the same time, according to the request of client B, the method interface is invoked using the default value 10 and other parameter values 3 and 4 in the request.

If client B is also upgraded, client B can set the specified value for the default parameter c in the request sent. For example, in Figure 2 (c), the value specified by the client B is the value specified by the default parameter c. It is 20, that is, Fun (3, 4, 20). Since client A does not upgrade, there is no default parameter c in the request sent by client A, which is still Fun(l, 2). After receiving these requests, server C queries the value of the default parameter c in these requests. Since the value of the default parameter c is not specified in the request of client A, server C retrieves the information saved by itself. To the default value of the default parameter c, 10, and then use the default value of 10 and the other parameter values 1 and 2 in the request to call the interface of the method according to the request of client A; meanwhile, according to the request of client B, due to the client The request of end B contains the value 20 specified for the default parameter c, and the server C uses the specified value 20 and the other parameter values 3 and 4 in the request to invoke the interface of the method.

Based on the foregoing technical solution, an embodiment of the present invention further discloses an apparatus for an interface call of a distributed system, where the apparatus can be integrated on a server, and an interface is defined by an IDL language, and the apparatus defines an IDL language in the upgraded interface. The identification of the default value of the method parameter is added, so that when the interface call request message sent by the client is received, the client can be determined as the upgraded new client according to whether the value of the default parameter is included in the interface call request message. Still an old customer who has not upgraded. FIG. 3 is a schematic block diagram showing the structure of an interface calling device for a distributed system according to an embodiment of the present invention. The device includes: a receiving unit 301, a default value obtaining unit 302, and a first calling interface unit 303, where

The receiving unit 301 is configured to receive an interface call request message sent by the client.

The default value obtaining unit 302 is configured to read a default parameter value of each IDL language in the interface call request message in the receiving unit 301, and when the interface call request message does not include the value of the IDL default parameter, the pre-stored information is used. Get the default value of the IDL default parameter; where the default value of the IDL default parameter can be pre-stored in the skeleton of the server where the device is located.

The first call interface unit 303 is configured to invoke the interface used by the client request by using the default value of the IDL default parameter obtained by the default value obtaining unit 302, to implement the corresponding application by using the function defined by the interface.

In the above embodiment, since the default parameter and the default value of the default parameter are set in the IDL of the interface calling method, when the IDL default parameter does not have a default value specified in the interface call request message sent by the client, the client The end is an old client that is not upgraded. At this point, the device can call the interface with its own pre-stored default value. It can be seen that the embodiment of the present invention implements the distinguishing operation between the new client and the old client by identifying the value of the IDL default parameter in the request message, and avoids the client linkage upgrade caused by the server system upgrade in the prior art. problem. By using the interface calling method of the embodiment of the present invention, it is not necessary to upgrade the old client program when the system is upgraded. Therefore, the linkage upgrade of the system components is overcome, the system upgrade operation is simple, the maintenance is convenient, and the lightweight component upgrade is realized.

In some embodiments of the present invention, the default parameter value of each IDL language in the interface call request message may be read by the receiving unit 301, and it is determined whether the interface call request message includes the value of the IDL default parameter, when the IDL default parameter is included. The subsequent operations are performed by the default value obtaining unit 302 and the first calling interface unit 303.

In addition, on the basis of the foregoing device embodiment, when the interface call request message in the receiving unit 301 includes the value specified by the client for the IDL default parameter, the device may directly use the specified The value of the call interface. FIG. 4 is a schematic block diagram showing another structure of an interface calling device for a distributed system according to an embodiment of the present invention. The device is based on the device embodiment shown in FIG. 3, and includes: a receiving unit 301, a default value obtaining unit 302, a first calling interface unit 303, a value obtaining unit 401, and a second calling interface unit 402, where

The value obtaining unit 401 is configured to: when the value of the IDL default parameter is included in the interface call request message in the receiving unit 301, obtain the value of the IDL default parameter from the interface call request message; the second call interface unit 402 is configured to use The value of the IDL default parameter acquired by the value obtaining unit 401 invokes the interface requested by the client to implement the corresponding application through the function defined by the interface.

Further, on the basis of the apparatus embodiment shown in Fig. 3 above, when the default value of the IDL default parameter is not found in the pre-stored information, the device can stop the call of the interface. FIG. 5 is a schematic block diagram showing another structure of an interface calling device for a distributed system according to an embodiment of the present invention. The device is based on the device embodiment shown in FIG. 3, and includes: a receiving unit 301, a default value obtaining unit 302, a first calling interface unit 303, and a default value determining executing unit 501, where

The receiving unit 301 is configured to receive an interface call request message sent by the client. When the value of the IDL default parameter is not included in the interface call request message in the receiving unit 301, the default value determining execution unit 501 determines whether the default value of the IDL default parameter is stored in the pre-stored information, and if so, the command default value. The obtaining unit 302 performs an acquisition function; otherwise, returns an abnormal response to the client.

The default value obtaining unit 302 is configured to obtain a default value of the IDL default parameter from the pre-stored information when the value of the IDL default parameter is not included in the interface call request message. The default value of the IDL default parameter may be pre-stored in the skeleton of the server side where the device is located.

The first call interface unit 303 is configured to use the default value of the IDL obtained by the default value obtaining unit 302. The default value of the number calls the interface used by the client request to implement the corresponding application through the functions defined by the interface.

In addition, the default value judgment execution unit 501 in the above apparatus embodiment can be applied to the apparatus embodiment shown in FIG. 4, and its function is the same as that shown in FIG. 5, in addition to the apparatus embodiment shown in FIG. I will not repeat them here.

In addition, based on the foregoing device embodiments, the embodiment of the present invention further discloses a distributed system, where the system includes a client and a server, where the server includes the embodiment as shown in FIG. 3 or FIG. The interface of the distributed system is called the device, and the structure and function of the device are the same as those of the device embodiment shown in FIG. 3 or FIG. 4, and details are not described herein again.

The embodiment of the invention also discloses a distributed system, comprising:

The server that communicates with the client,

The server is configured to receive an interface call request message from the client. When the interface call request message does not include the value of the IDL default parameter, the default value of the IDL default parameter is obtained from the pre-stored information, and the default value of the obtained IDL default parameter is used. The value calls the interface requested by the client.

The server is further configured to: when the received interface call request message includes the value of the IDL default parameter, obtain the value of the IDL default parameter from the interface call request message, and invoke the interface requested by the client by using the value of the IDL default parameter.

The server is further configured to determine whether the default value of the IDL default parameter is stored in the pre-stored information, and if not, return an abnormal response to the client.

In the above embodiment, the default parameter and the default value of the default parameter are set in the IDL of the interface calling method, so that when the value of the default parameter is specified in the interface call request message sent by the client, the client For the upgraded new client, at this time, the server uses the value specified in the interface call request message to call the corresponding interface to implement the subsequent operation; if the default parameter in the interface call request message does not specify the default value, then the client is If the default value of the default parameter is saved on the server side, the server side uses the default value to call the required interface. It can be seen that the embodiment of the present invention realizes the distinguishing operation between the new client and the old client by identifying the value of the default parameter in the request message, and avoids the problem of client linkage upgrade caused by the server system upgrade in the prior art. It makes the system upgrade easy to operate, easy to maintain, and realizes lightweight component upgrade. In addition, the embodiment of the present invention uses the way of adding default parameters to the old interface to implement the calling of the upgraded component, and does not need to add a new interface, thereby avoiding the cumbersome processing caused by the code redundancy of the new interface during the call. Easy to maintain.

The device embodiments described above are merely illustrative, wherein the units illustrated as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, ie may be located in one place. , or it can be distributed to multiple network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment. Those of ordinary skill in the art can understand and implement without deliberate labor.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is a better implementation. the way. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product in essence or in the form of a software product, which may be stored in a storage medium such as a ROM/RAM or a disk. , an optical disk, etc., includes instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention or portions of the embodiments.

The embodiments of the present invention described above are not intended to limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

Rights request

A method for invoking an interface of a distributed system, the method comprising: receiving an interface call request message sent by a client;

Determining whether the interface call request message includes a value of a default parameter of the interface description language IDL, if not, obtaining a default value of the IDL default parameter from the pre-stored information; using a default value of the obtained IDL default parameter The interface that invoked the client request.

2. The interface calling method of a distributed system according to claim 1, wherein the method further comprises:

If the value of the IDL default parameter is included in the interface call request message, the value of the IDL default parameter is obtained from the interface call request message, and the interface requested by the client is invoked by using the value of the IDL default parameter. .

The interface calling method of the distributed system according to claim 1, wherein before performing the obtaining the default value of the IDL default parameter, the method further includes:

Determining whether a default value of the IDL default parameter is saved in the pre-stored information, and if so, performing the default value action of obtaining the IDL default parameter.

The interface calling method of the distributed system according to claim 3, wherein the method further comprises: when the default value of the IDL default parameter is not saved in the pre-stored information, to the client Returns an exception response.

A device for an interface call of a distributed system, the device comprising: a receiving unit, configured to receive an interface call request message sent by a client;

a default value obtaining unit, configured to: when a value of an IDL default parameter is not included in an interface call request message in the receiving unit, obtain a default value of the IDL default parameter from pre-stored information;

The apparatus for invoking an interface according to claim 5, wherein the apparatus further comprises: a value obtaining unit, configured to: when an interface call request message in the receiving unit includes a value of an IDL default parameter, Obtaining a value of the IDL default parameter from the interface call request message; And a second calling interface unit, configured to invoke the interface requested by the client by using a value of an IDL default parameter acquired by the value obtaining unit.

The device for invoking an interface according to claim 5, wherein the device further comprises: a default value determining execution unit, configured to determine whether a default value of the IDL default parameter is saved in the pre-stored information, If so, the default value obtaining unit is instructed to perform the obtaining action, otherwise, an abnormal response is returned to the client.

8. A distributed system, the system comprising: a server for communicating with a client,

The server is configured to receive an interface call request message from the client, and when the interface call request message does not include a value of an IDL default parameter, obtain a default value of the IDL default parameter from the pre-stored information, The interface requested by the client is invoked using the default value of the obtained IDL default parameter.

9. The system according to claim 8, wherein the server is further configured to: when the received interface call request message includes a value of an IDL default parameter, obtain the location from the interface call request message. The value of the IDL default parameter is used to invoke the interface requested by the client using the value of the IDL default parameter.

10. The system according to claim 8, wherein the server is further configured to determine whether a default value of the IDL default parameter is saved in the pre-stored information, and if not, return an abnormal response to the client. .