Package textio contains transforms for reading and writing text files.
Immediate reads a local file at pipeline construction-time and embeds the data into a I/O-free pipeline source. Should be used for small files only.
Read reads a set of file and returns the lines as a PCollection<string>. The newlines are not part of the lines.
ReadAll expands and reads the filename given as globs by the incoming PCollection<string>. It returns the lines of all files as a single PCollection<string>. The newlines are not part of the lines.
Write writes a PCollection<string> to a file as separate lines. The writer add a newline after each element.