Read JSON Stream

Reads a JSON stream as a Spark dataframe stream.

stream_read_json(sc, path, name = NULL, columns = NULL,
  options = list(), ...)

Arguments

sc

A spark_connection.

path

The path to the file. Needs to be accessible from the cluster. Supports the "hdfs://", "s3a://" and "file://" protocols.

name

The name to assign to the newly generated stream.

columns

A vector of column names or a named vector of column types.

options

A list of strings with additional options.

...

Optional arguments; currently unused.

See also

Examples

if (FALSE) { sc <- spark_connect(master = "local") dir.create("json-in") jsonlite::write_json(list(a = c(1,2), b = c(10,20)), "json-in/data.json") json_path <- file.path("file://", getwd(), "json-in") stream <- stream_read_json(sc, json_path) %>% stream_write_json("json-out") stream_stop(stream) }