125 results about "Program maintenance" patented technology

The present invention provides systems and methods for conducting electronic transactions in a distributed computing environment. A communications protocol is provided that enables reliable transactional state synchronization for peers participating in a distributed transaction. A transaction processing application is deployed on a local computer system to manage transactions thereon. The local computer system contacts a remote computer system to obtain authorization to execute a transaction. The local computer system initiates a failure-recovery job that is operable to automatically resend status signals and other information to the remote system if the communication with the remote system exhibits certain predefined fault conditions. The remote system is able to dynamically adjust the definition of the predefined fault conditions. If the transaction concludes without triggering the predefined fault conditions, the failure-recovery job is cancelled. The transaction processing application may also allow deferred transactions between remote parties. The transaction processing application maintains a record of the transactions performed by the consumer on the consumer's local system. Upon the occurrence of predefined conditions, transactional records are sent to a remote vendor or clearinghouse. The vendor or clearinghouse can manage the risk it bears by setting the predefined conditions appropriately.

An architecture and implementation for losslessly restarting subsystems in a distributed file system is described. By partitioning functionality and logging appropriately across the kernel and user-level boundaries on a client, the user-level subsystem may be made losslessly restartable. Practical mechanisms for supporting state-based recovery in replicated state machines and like replica are described. In particular, each client daemon may include an operations log and an applied log sequence number. Each client driver may include a potentially different operations log. Each client daemon may be configured to request logged operations associated with log sequence numbers in one or more ranges specified by a specification that includes the applied log sequence number. The requested logged operations may reside in the operations log maintained by a client driver. Each client daemon may operate in accordance with user-level constraints and each client driver may operate in accordance with kernel-level constraints.

The invention provides a method and system for data synchronization of relational heterogeneous databases. The method includes the steps that a synchronization table file, a key word information table and a statement calling table configured by a user in advance are acquired; an archive log file generated by a source database is acquired in real time; the archive log file is analyzed and converted into standard SQL statements; a subsequent log file generated by the source database is acquired in real time; the standard SQL statements are transmitted to a target database according to the subsequent log file. According to the method and system for data synchronization of the relational heterogeneous databases, an independent server is used for connecting the source database and the target database, the archive log file generated by reading the source database is adopted and converted to the standard SQL statements to be transmitted to the target database after being analyzed, and finally the SQL statements are made to run on the target database to achieve data synchronization. A synchronization mechanism is provided for data of the heterogeneous databases, system overhead and program maintenance work are reduced, and meanwhile timeliness of data synchronization is greatly improved.

A method, system and program for accessing records in a database object, such as an index or table. A cursor is maintained that points to a start entry in the database object. The database object has rows and columns of values. A runtime component receives a command to return a kth entry in the object having column values that satisfy predicates in a query statement. The runtime component calls a manager component that accesses entries in the database object to return the kth entry in the object having column values that satisfy the predicates. The manager component moves the cursor through sequential entries in the database object, in either the forward or reverse direction, until a kth entry that satisfies the predicates from the start entry is reached. The manager component positions the cursor to an entry that is the kth entry that satisfies the predicates from the start entry and returns data from the kth entry pointed to by the cursor to the runtime component.

An efficient program analysis method is provided for lazily decomposing aggregates (such as records and arrays) into simpler components based on the access patterns specific to a given program. This process allows us both to identify implicit aggregate structure not evident from declarative information in the program, and to simplify the representation of declared aggregates when references are made only to a subset of their components. The method can be exploited to yield: (i) a fast type analysis method applicable to program maintenance applications (such as date usage inference for the Year 2000 problem); and (ii) an efficient method for atomization of aggregates. More specifically, aggregate atomization decomposes all of the data that can be manipulated by the program into a set of disjoint atoms such that each data reference can be modeled as one or more references to atoms without loss of semantic information. Aggregate atomization can be used to adapt program analyses and representations designed for scalar data to aggregate data. In particular, atomization can be used to build more precise versions of program representations such as SSA form or PDGs. Such representations can in turn yield more accurate results for problems such as program slicing. Our techniques are especially useful in weakly-typed languages such as Cobol (where a variable need not be declared as an aggregate to store an aggregate value) and in languages where references to statically-defined sub-ranges of data such as arrays or strings are allowed.

The invention discloses an application program maintenance and update method and device. The method comprises the following steps: adding a file header for marking application program film suitable platforms to each application program file suitable for different platforms; packing the abovementioned plurality of application program files to generate one application program packet; downloading the application program packet to a terminal apparatus, and parsing the application program packet to obtain an application program file list; acquiring terminal apparatus platform information the and determining whether the file header of the application program file in the application program file list matches the terminal apparatus platform information; and updating the application program file suitable for the terminal apparatus platform to the terminal apparatus. The method provided by the invention can reduce the work load for application program maintenance, and can automatically search and update the application program file matching the application platform, thereby ensuring accurate update reducing uncertainty of manual intervention, and improving update quality and efficiency.

The invention discloses a shared storage message queue-based implementation method for high availability of virtual machines and relates to the field of cloud computing. The shared storage message queue-based implementation method for the high availability of the virtual machines comprises the following steps: initializing a piece of contiguous space on shared storage by a server program to serve as a logical volume; distributing a plurality of contiguous sectors from the logical volume to serve as a sector pool of a client program; acquiring the configuration information of the sector pool and the number of a virtual machine, of which the high availability is enabled, by the client program; sending a heartbeat message by the client program, and updating the timestamp of a virtual machine control block maintained by the client program; receiving the heartbeat message by the server program, and updating the timestamp of the virtual machine control block maintained by the server program by utilizing the timestamp carried in the heartbeat message. According to the shared storage message queue-based implementation method disclosed by the invention, the unnecessary stop time of the virtual machines is avoided; system resource consumption is low by adopting a heartbeat detection mechanism; the performance is high; the service life of the disk of the shared storage is prolonged.

The invention belongs to the field of program maintenance, and relates to a configuration file management method, which comprises the following steps of reading a configuration file in a program, andadding the configuration file information into a management library; receiving a processing instruction for the configuration file, the processing instruction comprising the file information and an operation instruction, the file information being used for specifying a configuration file to be operated, and the operation instruction being used for determining a processing program of the configuration file; operating the specified configuration file to be operated in the management library according to the operation instruction and the file information; and simultaneously updating the configuration file in the management library and the program based on the operation result. According to the method, the modification operation of the configuration file is simplified, the maintenance and operation of an operation and maintenance worker on the system are facilitated, and the modification of the configuration file is more intelligent and efficient. The invention further provides a configuration file management device, a computer device and a storage medium.

The invention relates to a control system for a loading and unloading manipulator of a press based on PID (proportion integration differentiation) control algorithm. Synchronous control of four-shaft alternating-current servo motor and analog input control of eight channels can be realized, movement and coordination of the manipulator and a feeding turntable are controlled according to stamping process flow, products are loaded or unloaded, products to be stamped and not in-place are detected and treated, safety of mechanical equipment is guaranteed, and the control system is flexible in use, sensitive in control reaction, low in program maintenance cost, stable, reliable and applicable to meeting stamping process requirements of other like products.

The invention relates to a method and system for generating and displaying a dynamic page. The method comprises the steps: establishing an element template table, an element instance table and a template instance publishing table in a database; acquiring display data and style data, which are required to be displayed, from the database according to display needs; assembling data carrying objects according to business needs, putting the acquired display data and style data into the data carrying objects and encapsulating, so as to form a data carrying object list; returning the encapsulated data carrying object list to the page for cycling; cyclically acquiring data by using a template technology according to the data carrying object list, and displaying the data, so as to achieve the generating and displaying of the dynamic page. According to the method and the system, the data are extracted from the database and are sorted as required, then, collection data are placed in a Request action scope, the data are traversed by using a tag technology, and cycling is carried out according to a specified number of columns, so as to output displayed data, thus, the workload of development is greatly reduced, and meanwhile, the workload of subsequent program maintenance is reduced.

The invention provides a program annotation method and device. The program annotation method comprises the steps of obtaining a multimedia annotation file corresponding to a program code and establishing association relation of the multimedia annotation file and the program code. The program code is annotated by adopting the multimedia annotation file, so that a program maintenance worker can quickly understand the program code according to the multimedia annotation file in the program code, and the maintenance efficiency of the program maintenance worker is improved.

The invention discloses a DSP (digital signal processor) embedded FLASH file storage system which comprises a root directory area, a data area, a file allocation table area, a backup root directory area and a backup file allocation table area, wherein the root directory area is used for storing file names, file lengths and the serial numbers of first data blocks corresponding to file data; the data area is used for storing the file data, and comprises a plurality of data blocks of equal size; the file allocation table area is used for storing pointer corresponding relationships between data blocks; the backup root directory area is connected with the root directory area, and used for carrying out recovery on the data in the root directory area when the root directory area goes wrong; and the backup file allocation table area is connected with the file allocation table area, and used for carrying out recovery on the data in the file allocation table area when the file allocation table area goes wrong. The file storage system disclosed by the invention has the advantages of convenient FLASH-space management, high management efficiency, high operation speed, and capability of facilitating the program maintenance and upgrade.

The invention discloses a managing method and system of key value data, wherein the method includes a key value data acquisition step which includes: A1: a client sending a key value data acquisition requirement to a key value data server; B1: the key value data server inquiring the key value data information base according to the requirement and judging whether the corresponding key value data is in the maintenance operation state, if not, sending the obtained key value data information to the corresponding client; C1: the client doing a specific application according to the received key value data information. The invention can effectively avoid the redundant key value and the key value definition conflict, increase the development efficiency of the distributed program, reduce the program maintenance cost, avoid the fault caused by the inconsistent key value data during the program interaction, and also reduce the occupied system resource of the program and improve the running efficiency.

The invention discloses a manipulator control system, comprising a PLC (Programmable Logic Controller), a control board, a solenoid valve and a position sensor, wherein the PLC is arranged in a manipulator control console, the control board is arranged on the control console, air pressure is controlled by the solenoid valve to realize the horizontal motion of a vertical pneumatic device and the horizontal motion of a horizontal pneumatic device, suction and release of a manipulator vacuum cup are controlled by the solenoid valve, and the position sensor is used for detecting the positions of a workpiece and a manipulator feed plate. Through the way, the manipulator control system disclosed by the invention is high in efficiency, flexible in use and low in program maintenance cost, and the stamping automatic production is realized.

The invention discloses a personnel information dynamic-extension realizing method for a human resource management information system, which belongs to the field of computer application. The method comprises steps of personnel information data item maintenance, database construction, interface construction and the like. Compared with the prior art, the method realizes a personnel information data item maintenance function. The system can dynamically increase fields to dynamically extend personnel information by the personnel information data item maintenance function and dynamically construct an extensible markup language (XML) by the change of a data structure, thereby updating a personnel information maintenance interface, synchronizing a program maintenance interface and the data structure and finishing the dynamic construction of personnel information functions. The system has relatively higher flexibility and expandability.

The present invention discloses an information collecting method, a terminal and a computer-readable storage medium. For a defect that an existing information collecting scheme may damage the simplicity of an original program and the difficulty of program maintenance is increased, the embodiment of the invention provides the information collecting method, since an event bound to an interactive control must be called when a user interacts with a terminal through the interactive control, a tracking tag in the embodiment can record interaction information during a period that the event is called,so by distributing a tracking tag to the interactive control in advance, once the user interacts with the interactive control, the corresponding interaction information is recorded in the tracking tag corresponding to the interactive control, burying a spot in a place relating to interaction is not needed, the simplicity of an application code is maintained, and the maintenance difficulty of theprogram is reduced. The embodiment also provides the terminal and the computer-readable storage medium, the information collection can be achieved without destroying the simplicity of the applicationprogram, and thereby the difficulty of the program maintenance is reduced.

The invention discloses a robot control method and device, a storage medium and a processor. The method includes the steps that multiple preset point locations are determined, wherein the multiple preset point locations are multiple point locations by which a robot passes when the robot executes job tasks; movement programs of the robot when the robot executes movement at all target point locations are determined, wherein the multiple preset point locations comprise the target point locations; and the robot is controlled to advance between the multiple preset point locations according to a preset sequence and execute the movement at all the target point locations according to the movement programs in order to complete the job tasks. By means of the robot control method and device, the storage medium and the processor, the problems that in the correlation technique, complex control programs need to be customized to control the robot to run, the control programs cannot be reused, and thecontrol programs are difficult to maintain are solved.