International Business Machines Corporation

Philip Graham Willoughby

George M Blue

Jamie P Squibb

Stephen James Hobson

Andrew Ian Hickson

Paul Stephen Dennis

Pete Siddall

Gary Patrick Longerstaey

Nigel Goddard

Martin James Gompertz

Andrew John Schofield

John James Ralph Scott

Alexis Birkill

A method for aiding resolution of a transaction for use with a transactional processing system comprising a transaction coordinator and a plurality of grouped and inter-connected resource managers, the method comprising the steps of: in response to a communications failure between the transaction coordinator and a first resource manager causing a transaction to have an in-doubt state, connecting, by the transaction coordinator, to a second resource manager; in response to the connecting step, sending by the transaction coordinator to the second resource manager, a resolve request comprising a resolution for the in-doubt transaction; in response to the resolve request, obtaining at the first resource manager, by the second resource manager, a lock to data associated with the in-doubt transaction; and in response to the obtaining step, determining, by the second resource manager, whether the transaction is associated with the first resource manager.

Aiding resolution of a transaction

In a messaging and queuing system that supports a cluster of logically associated messaging servers for controlling queues of messages, messages are processed. In response to an application program command to a first messaging server, a queue is opened, the queue having multiple instances on further messaging servers of the cluster. Responding to first messaging server putting messages on the queue, messages are distributed among the multiple instances of the queue on their respective messaging servers so as to balance. For the first message of an affinity set, access information for the particular queue instance to which it is put is obtained and stored. The access information may be used in order to send the further message to the particular queue instance and, if said further message is not part of the affinity set, it is put to an instance of the queue as determined by said predetermined rules.

Queueing messages related by affinity set

A method for encryption of blocks of data is provided including the steps of: encrypting a block of data using a current random number generated for the block of data; encoding the current random number using one or more of a set of previous random numbers, each of the set of previous random numbers having been used to encrypt a previously sent block of data; and transmitting the encrypted block of data with the one or more versions of the encoded current random number, each version for a different one of the previous random numbers. A method for decryption of blocks of data is provided including the steps of: receiving an encrypted block of data with the one or more versions of an encoded current random number, each version for a different one of the previous random numbers; selecting one of a set of previously received blocks of data for which the random number is available; decoding the current random number using the random number of the selected previously received block of data; and decrypting the received encrypted block of data using the decoded current random number.

Method and system for encryption of blocks of data

A method of managing an asynchronous messaging queue with a client computer in an asynchronous messaging system, where the client computer is programmed to store an manage the asynchronous messaging queue, includes receiving a reactive message in the asynchronous messaging queue, the reactive message including an identification of a previously initiated message and an action to be performed on the previously initiated message; and upon determining that the previously initiated message has already been received in the asynchronous messaging queue, performing the action on the previously initiated message with the client computer.

Managing queues in an asynchronous messaging system

A method for encryption of blocks of data (-) is provided including the steps of: encrypting () a block of data using a current random number (-) generated for the block of data (-); encoding () the current random number using one or more of a set of previous random numbers, each of the set of previous random numbers having been used to encrypt a previously sent block of data; and transmitting () the encrypted block of data (-) with the one or more versions of the encoded current random number (-), each version for a different one of the previous random numbers. A method for decryption of blocks of data is provided including the steps of: receiving () an encrypted block of data (-) with the one or more versions of an encoded current random number, each version for a different one of the previous random numbers (-); selecting () one of a set of previously received blocks of data for which the random number is available (-); decoding () the current random number using the random number of the selected previously received block of data; and decrypting () the received encrypted block of data (-) using the decoded current random number.

To protect sensitive data in program code, a method includes providing a programming interface with a capability of allocating a protected region of memory which can only be accessed by authorized code. Sensitive data present in program code is stored in the protected region of memory. The method includes marking parts of code in a program as authorized or not authorized to access the sensitive data, and determining if that part of a program which is executing is authorized to access protected data by reference to the marking.

Method and system for protecting sensitive data in a program

Providing controlled access for a destination in a messaging system includes: selecting a destination for storing messages in a messaging system, one or more of the messages comprising one or more message properties; associating each of a set of message requestors with a set of message selectors; and in response to an access request for the destination from a message requestor, determining the set of said message selectors associated with the message requestor and using the identified set of message selectors to check against messages on the destination comprising a corresponding set of message properties for providing a response to the access request.

Providing access control for a destination in a messaging system

A method and system for the management of tracing data of interest in a data processing system comprises identifying the location and length of one or more such units of interest as each unit is stored in main memory during execution of the program and recording a logical assignment of each unit of interest to a slot in a wrap around trace buffer. Copying of the units of interest to the trace buffer is deferred unless one or more predefined events occur. Such events may include an attempt to overwrite the data which has been logically assigned or a request for information stored in the trace buffer. The recorded assignments are discarded whenever it is calculated that the capacity of the trace buffer would be exceeded resulting in the corresponding units never needing to be copied to the trace buffer.

Managing the tracing of the execution of a computer program

Managing an asynchronous messaging queue with a client computer in an asynchronous messaging system, where the client computer is programmed to store an manage the asynchronous messaging queue, includes receiving a reactive message in the asynchronous messaging queue, the reactive message including an identification of a referenced message and an action to be performed on the referenced message; and performing the action on the previously initiated message with the client computer if the referenced message is present in the asynchronous messaging queue.

One aspect of the present invention provides a system configured to enable a proxy to redirect downloads from a web server to one or more remote machines via a command issued from a local computer web browser. In one embodiment, a user accesses the web server with a web browser on a local computer, and uses the web browser to initiate the download from the web server. Connection and authentication information for the download is sent to a router/proxy which is connected to both the local machine and the one or more remote machines. The router/proxy redirects the download to a process running on the one or more remote machines, where the download is then saved. The web browser on the local computer is then notified when the download is complete.

Using a proxy to redirect downloads

Provided are methods, apparatus and computer program products for change management within a data processing system and in particular for simulating the effect of removal of a file from the system. An anti-file is created within a file system layer that is overlaid onto a set of computer program files. The anti-file hides a corresponding first file such that overlaying the anti-file layer on the set of program files simulates the effect of removing the first file from the set of program files.

Method, apparatus and computer program product for change management in a data processing environment

The present invention provides for a method of using a proxy to redirect downloads from a web server to one or more remote machines via a command issued from a local computer web browser. A user accesses the web server with a web browser on a local computer, and uses the web browser to initiate the download from the web server. Connection and authentication information for the download is sent to a router/proxy which is connected to both the local machine and the one or more remote machines. The router/proxy redirects the download to a process running on the one or more remote machines, where the download then saved. The web browser on the local computer then is notified when the download is complete.

Growing community of inventors

Hampshire, United Kingdom

Philip Graham Willoughby