Document Logs
Change log:
Date: | Author: | Doc Version: | Changes: | Ext. | Int. | Is in Core |
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26 May 2011 | DWN | 0.1 | Doc. created |
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15 March 2012 | CM | 0.2 | New parameter Tree |
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28 August 2012 | CM | 0.3 | Added new parameter values |
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01 March 2013 | JSK | 0.4 | Added extra column descriptions for CDR_FILE_DEF and CDR_RECORD_DEF. |
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07 October 2013 | JSK | 1.12 | Added section 3.1.11 concerning Hookpoint Invokation in the Pre or Post process of file processing. |
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14 May 2014 | KTH | 1.12.1 | Added new parameter: DB_SYS_PACKAGE_NAME |
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22 May 2014 | KTH | 1.12.2 | Added new Parameter: CHARACTER_ENCODING | |||
30 October 2015 | KTH | 1.13 | Added new column SEQUENCE columns to CDR_RECORDFILE_DEF table (Available for FileProcessor Integration project version 2.2) | |||
26 November | Karuna Thulluri | 1.14 | JSON File export feature added Added new column XML_FILE_NAME_COLUMN columns to CDR_FILE_DEF table (Available for FileProcessor Integration project version 2.23-SNAPSHOT. Yet to be released) |
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1 - Purpose of Document
This document presents the design of the file processor framework. This framework can be used to load and export any type of ASCII-based file. The design has been based on loading and exporting of CDR (Call Detail Records) ASCII files. As such must references have been made to CDR files. However, the same concept has been used for loading/exporting other non-CDR ASCII based files
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- Design Overview
A CDR File is a file containing CALL DETAIL RECORDS in a pre-defined format and order. This document aims at modelling a CDR File in a generic way. This could also be extended to any normal ASCII-based file. As such this document could also be used to model any ASCII-based file.
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Figure 2.1 (below) represents the above tables and their respective classes:
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Figure 2.1 Data Model for CDR file
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The above design is shown in figure 2.3.1 below:
Figure 2.3.1 File Processor UML.
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Model Description
3.1 Loading Files
To configure the loading of a file, the following must be defined or configured.
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COLUMN NAME | DESCRIPTION |
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NAME | Name of the Cdr File Definition |
DESCRIPTION | Description of Cdr File Definition |
KEY | Unique key of a file defintion |
CODE | Code, in-case sub classing is needed in the future |
MAX_RECORDS | Maximum number of records in a file (Default value -1 (no maximum number of records)) |
CDR_PARSER_ID | Parser used for parsing a file into records (CDR_PARSER_ID = CDR_PARSER.ID) |
BILLING_SOURCE_TABLE_NAME | Table name for storing file information source |
RECORD_SEPARATOR_ID | Type of separator used for separating one record from another (RECORD_SEPARATOR_ID = ITEM_SEPARATOR.ID). The default is a carriage return line feed |
FILENAME_FORMAT | Format of filename to be loaded (Perl regular expression format). If set only filenames that match the format will be processed otherwise all files are processed |
EXPORT_TYPE | The type of file records to be exported. Used when generating export files. The source table (for export) must have a column with name 'EXPORT_TYPE' whose value must match this value |
PRE_EXPORT_PROCEDURE | Used when exporting files. Called before any final generation processing commences. Used to add extra export values that can only be added at time of export |
XML_DOCUMENT_DEF_ID | Used when exporting XML files. (XML_DOCUMENT_DEF_ID = XML_DOCUMENT_DEF.ID) |
BILLING_SOURCE_CLASS | Class used to model the table defined in the column 'BILLING_SOURCE_TABLE_NAME' |
FILE_NAME_SUFFIX | Suffix (extension) to be added to the export filename |
FILE_NAME_GENERATOR_METHOD | Method on the BILLING_SOURCE_CLASS used to generate a filename during export. This method must take the ID of the record in the 'BILLING_SOURCE_TABLE_NAME' table, and the CDR_FILE_DEF ID as parameters. For example for exporting a CDR file, the ID will be the ID of the appropriate SP_FILE_HEADER record linked to the rated BILLING_RECORDs (BILLING_RECORD.SP_FILE_ID = SP_FILE_HEADER.ID) being exported. |
PRE_PROCESSOR_METHOD | Method in the BILLING_SOURCE_CLASS called before processing a file. The method must take CdrFileDef object as parameter. Could be used to validate if a file has already been loaded or to delete all records in a table before loading. |
POST_PROCESSOR_METHOD | Method in the BILLING_SOURCE_CLASS called after processing a file. The method must take CdrFileDef object as parameter. Could be used for validating contents of the detail against information on the trailer. |
RECORD_FOR_HEADER | Possible values are Y and N. This column is solely taken into an account, if the PERSIST column has the value Y. In case the first line in the loaded file must be stored in the BATCH_FILE_LINE table, the RECORD_FOR_HEADER column must be set to Y. |
STATUS_COLUMN_NAME | String value. Defines the column name for status of billing source table. If left empty a default name of STATUS is used. |
NUMBER_OF_RECS_COLUMN_NAME | String with default value 'NUMBER_OF_RECS'. Defines the column name, where the number of the content lines in a loaded file must be stored. |
DATE_LOADED_COLUMN_NAME | String with default value 'DATE_LOADED'. Defines the column name, where the time of the loading must be stored. The column is mandatory in the billing source table. |
SAVE_RECORD_ORDER | Char with possible values 'Y'/'N' and default value 'N'. Defines whether line number of a loaded record must be stored in the db. |
RECORD_ORDER_COLUMN_NAME | String with default value 'LINE_IN_FILE'. Defines the column name, where the line number of the loaded record must be stored. |
STATUS_VALUE | String with default value '0'. Defines the status of the loaded file. |
COMMENT_COLUMN_NAME | Defines the column name in the billing source table (defined in the column billing_source_table_name), where error messages are posted, if a file generation fails. Not mandatory in the billing source table. If left out, error messages are simply not posted in the billing source table. |
PRE_PROCESSOR_HOOKPOINT_KEY | Sets the Hookpoint key to be called in the pre-process. Is invoked with the prefix FILE_PROCESSOR_. |
POST_PROCESSOR_HOOKPOINT_KEY | Sets the Hookpoint key to be called in the post-process. Is invoked with the prefix FILE_PROCESSOR_. |
COLUMN NAME | DESCRIPTION |
XML_FILE_NAME_COLUMNThis column can be used to generate both a flat file and also an Xml file for the same source record. The value of XML_FILE__NAME | The value of FILE_NAME_COLUMN must should be the name of the column from the Source table where the generated XML filename will be saved to. The FILENAME column of Source table will be used to save the filename, if this If CDR_FILE_DEF.XML_FILE_NAME_COLUMN_NAMEis empty. , the FILENAME column of Source table will be used to save the filename. If both a flat file and , an XML file and a JSON file should be generated on the same source record: Then define 3 different CDR_FILE_DEF entries, each with proper column name set in the FILE_NAME_COLUMN of_NAME. For example:
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3.1.2 CDR Record Definition (CDR_RECORD_DEF)
A CDR Record Definition (CDR_RECORD_DEF) defines a record in a CDR file and has the following columns in the CDR_RECORD_DEF table.
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3.1.2 CDR Record Definition (CDR_RECORD_DEF)
A CDR Record Definition (CDR_RECORD_DEF) defines a record in a CDR file and has the following columns in the CDR_RECORD_DEF table.
COLUMN NAME | DESCRIPTION | ||||||||||||||||||||||||||||||
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ID | Unique table ID | ||||||||||||||||||||||||||||||
NAME | Name of record definition | ||||||||||||||||||||||||||||||
CODE | Code for sub-classing should one of the following DETAIL, HEADER, TRAILER | ||||||||||||||||||||||||||||||
DESCRIPTION | Record definition description | ||||||||||||||||||||||||||||||
CDR_FILE_DEF_ID | ID of CDR_FILE_DEF to which this record definition record belongs | ||||||||||||||||||||||||||||||
FIELD_SEPARATOR_ID | Defines what separates one record field from another. Points to a record in the ITEM_SEPARATOR table (CDR_RECORD_DEF.FIELD_SEPARATOR_ID = ITEM_SEPRARATOR.ID) | ||||||||||||||||||||||||||||||
MAX_LENGTH | Defines the length of the record; the default value being -1 meaning record is of variable length | ||||||||||||||||||||||||||||||
FULL_LENGTH | If the MAX_LENGTH attribute is not -1, and the FULL_LENGTH attribute is set to ‘Y’, then the record must be of length MAX_LENGTH. Default value is N | ||||||||||||||||||||||||||||||
CDR_PARSER_ID | Parser used to parse a record into fields. (CDR_RECORD_DEF.CDR_PARSER_ID = CDR_PARSER.ID | ||||||||||||||||||||||||||||||
RECORD_TABLE_NAME | Name of the table where records are saved. Usually for header and trailer records, the value of this table is the SOURCE_TABLE while for detail records it is the record (BILLING_RECORD) table | ||||||||||||||||||||||||||||||
RECORD_TABLE_CODE | Code to be used in the record table in-case sub-classing is to be used | ||||||||||||||||||||||||||||||
RECORD_IDENTIFIER_TYPE | If this value is set, then the record will be identified using a CDR_RECORD_IDENTIFIER. Possible values are 'ALL' or 'AT_LEAST_ONE'. These are explained in subsection 3.1.3. | ||||||||||||||||||||||||||||||
PERSIST | Determines if a record should be persisted. Sometimes, one may not need to persist a CDR_RECORD (as in the case where the record is a header of column name). Default value is 'Y' (meaning persist data) otherwise it is 'N' (meaning do not persist data). | ||||||||||||||||||||||||||||||
RECORD_CLASS | The fully qualified class name of that models the table defined by the RECORD_TABLE_NAME | ||||||||||||||||||||||||||||||
SOURCE_TABLE_KEY | This columns holds the column name in RECORD_TABLE_NAME table that points to the SOURCE TABLE. This is used by CDR_RECORD_DEFs. | ||||||||||||||||||||||||||||||
STATUS_COLUMN_NAME | String value. Name of the column where the record status must be stored. | ||||||||||||||||||||||||||||||
STATUS_VALUE | Value to be set in status column defined in STATUS_COLUMN_NAME. | ||||||||||||||||||||||||||||||
HOOKPOINT_KEY | If this is set, it will save this value into RECORD_TABLE_NAME.HOOKPOINT_KEY, not a mandatory value. | ||||||||||||||||||||||||||||||
SEQUENCE | SEQUENCE column is used to define multiple record definitions for same record type (i.e. for example multiple record definitions for HEADER record for same File Definition) and define the sequence in which they can appear in the exported file. For example, if an exported file should contain 3 lines in the header and each of these lines has a difference structure, then it is possible to define 3 HEADER record definition entries with SEQUENCE 1, 2 and 3 based on the required order of these lines in the file. Then the file processor with get all the header definitions and handles one by one in the defined sequence, writing the lines matching that record definition only. Important Note: If only one record definition entry is needed for a record type, then the SEQUENCE Column of that record definition entry must be left empty.
Example:
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- Parameter 1 is the engine name (“CDR_FILE_LOADER_ENGINE” (for CdrFileLoaderEngine) or “CDR_EXPOR_FILE_GENERATOR_ENGINE” (for CdrExportFileGeneratoeEngine)), or “CDR_FILE_PROCESSING_ENGINE” (for both loading and file generation)).
- Parameter 2 is the Engine Instance Number
- Parameter 3 is the type of processing (“LOADER” (for CdrFileLoaderEngine) or “GENERATOR” (for CdrExportFileGeneratoeEngine)).
If parameter 3 is not set, then the engine will perform both loading and export file generation.
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Parameter Setup
The following table shows the parameter setup that can be used by CdrFileprocessorEngine. The parameters are under the node "FILE_PROCESSING".
NAME | VALUE | TYPE | OPTIONAL | DESCRIPTION |
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MOVE_INVALID_FILE | true|false | String | Yes | Defines whether the engine should move files if they do not meet the pattern name criteria |
MAX_FILES_TO_LOAD | integer bigger than 0 | Integer | Yes | Defines the number of files that are processed in a single engine iteration. If not present, the default value is 50 |
BATCH_SIZE | integer bigger than 0 | Integer | Yes | Number of SQL statements size used to load in batch. If not present, the default value is 100 |
DB_SYS_PACKAGE_NAME | SYS/CORE_SYS | String | YesDefines the name of (Mandatory if CORE_SYS package is used) | Defines the name of the sys package to be used in SQL-statements Default SYS (if this parameter is not defined) |
CHARACTER_ENCODING | <Valid character encoding> | String | Yes | Defines the character encoding to be used while importing the files. If this parameter exists, the encoding specified in this parameter will be used to read the file. Otherwise the default encoding will be used. |
5 MONITORING
5.1 File Generator
If the File Processor engine cannot generate the file due to an exception, it will insert an entry into EXCEPTION_LOG table. The ID from EXCEPTION_LOG.EXCEPTION_STACK_TRACE_ID can be used to find the corresponding entry from EXCEPTION_STACK_TRACE, which contains the stack trace of the exception.
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select * from EXCEPTION_LOG where TABLE_NAME = 'CDR_FILE_PROCESSOR' and SOURCE_KEY = '<CDR_FILE_PROCESSOR.NAME for corresponding CDR_FILE_PROCESSOR entry>' order by id desc; |
5.1 File Loader
If the File Processor engine cannot load the file due to an exception or due to errors while parsing the file, it will insert an entry into LOAD_ERRORS table.
File Processor engine inserts an entry into CDR_FILE_PROCESSOR_LOG table upon successful loading of the file.