JP2003076563A5

JP2003076563A5 -

Info

Publication number: JP2003076563A5
Application number: JP2002174417A
Authority: JP
Filing date: 2002-06-14
Publication date: 2005-10-20

Claims

When the communication protocol of the client-side distributed object middleware and the server-side distributed object middleware are different, a method for realizing a method call of an object on the server side from the client-side object via the respective distributed object middleware ,
Based on the remote reference acquisition relay object that relays the acquisition of the remote reference of the server side object requested from the client side between the client side distributed object middleware and the server side distributed object middleware, and the class definition of the server side object A generated remote method call relay object class, the method comprising:
The remote reference acquisition relay object, the steps of the client by the communication protocol of client-side distributed object middleware accepting an acquisition request of remote references to the server-side object, by the said server-side distributed object middleware protocol acquisition request received Transmitting to the server ;
The remote reference acquisition relay object, receiving a remote reference of the server-side object from the server, based on the remote references the received remote method corresponding to the server-side object from the class of the remote method invocation relayed object Activating a call relay object;
The remote reference acquisition relay object returning access information to the activated remote method call relay object to the client as a response to the remote reference acquisition request of the server-side object requested from the client; A distributed object middleware cooperation method, comprising:

When the remote reference acquisition relay object receives the remote reference from the server, the skeleton object and the stub object corresponding to the server side object and operating based on the communication protocol of the server side distributed object middleware are respectively connected to the server and the remote Starting on a computer having a reference acquisition relay object ;
When the remote reference acquisition relay object returns access information to the remote method call relay object to the client, a skeleton object and a stub object corresponding to the remote method call relay object are respectively provided with the remote reference acquisition relay object. The method of claim 1, comprising: and starting at the client .

When the remote reference acquisition relay object accepts a remote reference acquisition request for a server-side object from a client, a remote reference for the remote reference acquisition relay object is transmitted between the client and the computer having the remote reference acquisition relay object. The method according to claim 1 or 2 , further comprising a step for giving and receiving .

The method according to claim 1, wherein the class of the remote method call relay object is generated from the class of the corresponding server object in a predetermined generation step .

The method according to claim 4, wherein the class generation step includes a step of setting a report destination of an abnormal operation to a client that has requested the remote reference acquisition.

The method according to claim 4, wherein the generating step includes a step of converting a method argument generated from the server object class and a return value type from the method into a type usable by a client.

The predetermined generation step includes:
  Reading the class file of the target server object;
  The class name definition information of the server object is acquired from the read class file, and the class name determined from the acquired class name definition information and a predetermined class name assignment rule is assigned to the remote corresponding to the server object. Outputting as a class name of the method call relay object class to a relay class file that is a class file of the remote method call relay object;
  A method definition for receiving a remote reference to the server object from a remote reference acquisition relay object, and outputting a definition of a variable for holding the received remote reference to the relay class file;
  Extracting all methods defined as server object classes from the read server object class file;
  For each extracted method, a method declaration that is the same as the method of the server object class, and a processing program that calls a method in the server object using the remote reference as the processing corresponding to the method declaration, Steps to output to the relay class file
  5. The method of claim 4, comprising:

Cooperation means for realizing a method call from the client-side object to the server-side object via each middleware when the client-side distributed object middleware and the server-side distributed object middleware have different communication protocols Distributed object middleware cooperation processing program to function as
  The cooperation unit includes: a remote reference acquisition relay unit that relays acquisition of a remote reference of the server side object requested from the client side; and a remote method call relay unit that is generated based on a class definition of the server side object. Prepared,
  The remote reference acquisition relay means includes
  Means for receiving an acquisition request for remote reference related to the server-side object from a client by a communication protocol of the client-side distributed object middleware, and transmitting the received acquisition request to a server by a protocol of the server-side distributed object middleware;
  Means for receiving a remote reference of the server-side object from a server, and based on the received remote reference, activating the remote method call relay means;
  Means for returning access information to the activated remote method call relay means to the client as a response to the remote reference acquisition request of the server-side object requested from the client;
  A distributed object middleware cooperation processing program characterized by comprising:

The cooperation means is
  Means for activating a stub object corresponding to the server-side object and operating based on a communication protocol of the server-side distributed object middleware when the remote reference acquisition relay means receives the remote reference from a server;
  Means for activating a skeleton object corresponding to the remote method call relay means when the remote reference acquisition relay object returns access information to the remote method call relay object to the client;
  The program according to claim 8, including:

The cooperation means is
The remote reference acquisition relay means acquires a remote reference related to a server-side object. The program according to claim 8 or 9, further comprising means for exchanging a remote reference related to the remote reference acquisition relay means with the client when receiving a request from the client.

9. The program according to claim 8, wherein the class of the remote method call relay object that defines the processing of the remote method call relay means is generated from the class of the corresponding server object.

The program according to claim 11, wherein the remote method call relay unit transmits an abnormal operation to a client that has issued the remote reference acquisition request.

The program according to claim 11 or 12, wherein the remote method call relay unit converts a type of an argument of a method for calling the server-side object and a type of a return value from the method into a type usable by the client. .

The class of the remote method call relay object is:
  Reading the class file of the target server object;
  The class name definition information of the server object is acquired from the read class file, and the class name determined from the acquired class name definition information and a predetermined class name assignment rule is assigned to the remote corresponding to the server object. Outputting as a class name of the method call relay object class to a relay class file that is a class file of the remote method call relay object;
  A method definition for receiving a remote reference to the server object from a remote reference acquisition relay object, and outputting a definition of a variable for holding the received remote reference to the relay class file;
  Extracting all methods defined as server object classes from the read server object class file;
  For each extracted method, a method declaration that is the same as the method of the server object class, and a processing program that calls a method in the server object using the remote reference as the processing corresponding to the method declaration, Steps for outputting to a relay class file
  The program of Claim 11 produced | generated by these.