Abstract: A method and system for accessing an HDFS is disclosed. In some embodiments, a method of providing access to an HDFS includes: at an interface server having one or more processors and memory: maintaining a respective connection pool comprising a respective plurality of persistent connections to the HDFS; receiving respective access requests from a plurality of accessing devices to access the HDFS; creating a corresponding Hadoop operation for each of the respective access requests received from the plurality of accessing devices; and executing the corresponding Hadoop operation created for each of the respective access requests through a respective set of persistent connections selected from the respective connection pool maintained by the interface server.

Abstract: A method of mining test coverage data includes: at a device having one or more processors and memory: sequentially processing each of a plurality of coverage data files that is generated by executing the program using a respective test input of a plurality of test inputs, where the processing of each current coverage data file extracts respective execution counter data from the current coverage data file; after processing each current coverage data file, determining whether the respective execution counter data extracted from the current coverage data file includes a predetermined change relative to the respective execution counter data extracted from previously processed coverage data files; and in response to detecting the predetermined change for the current coverage data file, including the respective test input used to generate the current coverage data file in a test input collection for testing the program.

Abstract: A method and system for accessing an HDFS is disclosed. In some embodiments, a method of providing access to an HDFS includes: at an interface server having one or more processors and memory: maintaining a respective connection pool comprising a respective plurality of persistent connections to the HDFS; receiving respective access requests from a plurality of accessing devices to access the HDFS; creating a corresponding Hadoop operation for each of the respective access requests received from the plurality of accessing devices; and executing the corresponding Hadoop operation created for each of the respective access requests through a respective set of persistent connections selected from the respective connection pool maintained by the interface server.

Abstract: The present disclosure relates to a method and system for file processing. The file processing method may include the steps of scanning a source files, identifying a target code block, and generating a first abstract syntax tree (AST) reflecting the structure of the target code block. The file processing method may further include the steps of identifying a position to place a plugin code, placing the plugin code into the first AST, generating a second AST reflecting the structure of the target code block with the plugin code, and using the write-back interface to write the second AST into the source file. The present disclosure may improve the efficiency and enhance the flexibility of the file processing system.

Abstract: A method of mining test coverage data includes: at a device having one or more processors and memory: sequentially processing each of a plurality of coverage data files that is generated by executing the program using a respective test input of a plurality of test inputs, where the processing of each current coverage data file extracts respective execution counter data from the current coverage data file; after processing each current coverage data file, determining whether the respective execution counter data extracted from the current coverage data file includes a predetermined change relative to the respective execution counter data extracted from previously processed coverage data files; and in response to detecting the predetermined change for the current coverage data file, including the respective test input used to generate the current coverage data file in a test input collection for testing the program.

Abstract: The present disclosure relates to a method and system for file processing. The file processing method may include the steps of scanning a source files, identifying a target code block, and generating a first abstract syntax tree (AST) reflecting the structure of the target code block. The file processing method may further include the steps of identifying a position to place a plugin code, placing the plugin code into the first AST, generating a second AST reflecting the structure of the target code block with the plugin code, and using the write-back interface to write the second AST into the source file. The present disclosure may improve the efficiency and enhance the flexibility of the file processing system.