OpenFileForReading

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API Reference for EPL (ApamaDoc) 10.11.3.3

SUMMARY: IMPORT | CONSTANT | MEMBER | ACTION

DETAIL: IMPORT | CONSTANT | MEMBER | ACTION

com.apama.file
Event OpenFileForReading

The OpenFileForReading event is a signal to the FileAdapter to open the file specified in order to read lines and deliver back events.

A FileHandle event will be sent back if the file has been opened successfully. It will be in response to the requestId specified here, and will contain the sessionId used for the file.

Subsequent file line events generated from this file and sent to the correlator will reference this ID.

For Fixed Width files, the optional members fieldLength, isLeftAligned and pad character must be specified. These will be mapped to the payload when being sent to the adapter.

Member summary
`string`	`transportName` The name of the transport being used within the file adapter. This should match the transport name used in the IAF config file so the transport can recognise events intended for it. Default configuration: "JMultiFileTransport".
`integer`	`requestId` Request ID for this open file event. The response, either a FileHandle Event or an error, will contain this ID.
`string`	`codec` The name of the codec to use with the file. This should match one of the codecs specified in the (static) config file. Use the null codec (by default this is called JNullCodec)to read entire lines without additional interpretation taking place.
`string`	`filename` Full filename, or file pattern (i.e. .txt, .csv etc) within directory path if intending to read all files matching a pattern in order of last time modified.
`integer`	`linesInHeader` Lines in header.
`string`	`acceptedLinePattern` Java Regex pattern to use to match lines to read. Only lines matching this pattern will be read. Leave blank i.e. "" if all lines should be read.
`dictionary<string, string>`	`payload` Additional payload items.

Member detail

acceptedLinePattern

            string acceptedLinePattern

Java Regex pattern to use to match lines to read. Only lines matching this pattern will be read. Leave blank i.e. "" if all lines should be read.

codec

            string codec

The name of the codec to use with the file. This should match one of the codecs specified in the (static) config file. Use the null codec (by default this is called JNullCodec)to read entire lines without additional interpretation taking place.

filename

            string filename

Full filename, or file pattern (i.e. *.txt, *.csv etc) within directory path if intending to read all files matching a pattern in order of last time modified.

linesInHeader

            integer linesInHeader

Lines in header.

Text files sometimes contain a number of lines at the beginning of the file explaining the format. As these are usually of some specific format, the Apama File Adapter cannot interpret them. Therefore by skipping the lines the File adapter can return just the data contained within the file. Specify here the number of lines in the header, or 0 if no header.

payload

            dictionary<string, string> payload

Additional payload items.

requestId

            integer requestId

Request ID for this open file event. The response, either a FileHandle Event or an error, will contain this ID.

transportName

            string transportName

The name of the transport being used within the file adapter. This should match the transport name used in the IAF config file so the transport can recognise events intended for it. Default configuration: "JMultiFileTransport".