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OssFile

Oss file sink connector

Description

Output data to oss file system.

Tips: We made some trade-offs in order to support more file types, so we used the HDFS protocol for internal access to OSS and this connector need some hadoop dependencies. It only supports hadoop version 2.9.X+.

Key features

By default, we use 2PC commit to ensure exactly-once

Options

name type required default value
path string yes -
bucket string yes -
access_key string yes -
access_secret string yes -
endpoint string yes -
file_name_expression string no "${transactionId}"
file_format string no "text"
filename_time_format string no "yyyy.MM.dd"
field_delimiter string no '\001'
row_delimiter string no "\n"
partition_by array no -
partition_dir_expression string no "${k0}=${v0}/${k1}=${v1}/.../${kn}=${vn}/"
is_partition_field_write_in_file boolean no false
sink_columns array no When this parameter is empty, all fields are sink columns
is_enable_transaction boolean no true
common-options no -

path [string]

The target dir path is required.

bucket [string]

The bucket address of oss file system, for example: oss://tyrantlucifer-image-bed

access_key [string]

The access key of oss file system.

access_secret [string]

The access secret of oss file system.

endpoint [string]

The endpoint of oss file system.

file_name_expression [string]

file_name_expression describes the file expression which will be created into the path. We can add the variable ${now} or ${uuid} in the file_name_expression, like test_${uuid}_${now}, ${now} represents the current time, and its format can be defined by specifying the option filename_time_format.

Please note that, If is_enable_transaction is true, we will auto add ${transactionId}_ in the head of the file.

file_format [string]

We supported as the following file types:

text csv parquet orc json

Please note that, The final file name will end with the file_format's suffix, the suffix of the text file is txt.

filename_time_format [string]

When the format in the file_name_expression parameter is xxxx-${now} , filename_time_format can specify the time format of the path, and the default value is yyyy.MM.dd . The commonly used time formats are listed as follows:

Symbol Description
y Year
M Month
d Day of month
H Hour in day (0-23)
m Minute in hour
s Second in minute

See Java SimpleDateFormat for detailed time format syntax.

field_delimiter [string]

The separator between columns in a row of data. Only needed by text and csv file format.

row_delimiter [string]

The separator between rows in a file. Only needed by text and csv file format.

partition_by [array]

Partition data based on selected fields

partition_dir_expression [string]

If the partition_by is specified, we will generate the corresponding partition directory based on the partition information, and the final file will be placed in the partition directory.

Default partition_dir_expression is ${k0}=${v0}/${k1}=${v1}/.../${kn}=${vn}/. k0 is the first partition field and v0 is the value of the first partition field.

is_partition_field_write_in_file [boolean]

If is_partition_field_write_in_file is true, the partition field and the value of it will be written into data file.

For example, if you want to write a Hive Data File, Its value should be false.

sink_columns [array]

Which columns need be written to file, default value is all the columns get from Transform or Source. The order of the fields determines the order in which the file is actually written.

is_enable_transaction [boolean]

If is_enable_transaction is true, we will ensure that data will not be lost or duplicated when it is written to the target directory.

Please note that, If is_enable_transaction is true, we will auto add ${transactionId}_ in the head of the file.

Only support true now.

common options

Sink plugin common parameters, please refer to Sink Common Options for details.

Example

For text file format

  OssFile {
    path="/seatunnel/sink"
    bucket = "oss://tyrantlucifer-image-bed"
    access_key = "xxxxxxxxxxx"
    access_secret = "xxxxxxxxxxx"
    endpoint = "oss-cn-beijing.aliyuncs.com"
    field_delimiter = "\t"
    row_delimiter = "\n"
    partition_by = ["age"]
    partition_dir_expression = "${k0}=${v0}"
    is_partition_field_write_in_file = true
    file_name_expression = "${transactionId}_${now}"
    file_format = "text"
    sink_columns = ["name","age"]
    filename_time_format = "yyyy.MM.dd"
    is_enable_transaction = true
  }

For parquet file format

  OssFile {
    path = "/seatunnel/sink"
    bucket = "oss://tyrantlucifer-image-bed"
    access_key = "xxxxxxxxxxx"
    access_secret = "xxxxxxxxxxxxxxxxx"
    endpoint = "oss-cn-beijing.aliyuncs.com"
    field_delimiter = "\t"
    row_delimiter = "\n"
    partition_by = ["age"]
    partition_dir_expression = "${k0}=${v0}"
    is_partition_field_write_in_file = true
    file_name_expression = "${transactionId}_${now}"
    file_format = "parquet"
    sink_columns = ["name","age"]
    filename_time_format = "yyyy.MM.dd"
    is_enable_transaction = true
  }

For orc file format

  OssFile {
    path="/seatunnel/sink"
    bucket = "oss://tyrantlucifer-image-bed"
    access_key = "xxxxxxxxxxx"
    access_secret = "xxxxxxxxxxx"
    endpoint = "oss-cn-beijing.aliyuncs.com"
    field_delimiter = "\t"
    row_delimiter = "\n"
    partition_by = ["age"]
    partition_dir_expression = "${k0}=${v0}"
    is_partition_field_write_in_file = true
    file_name_expression = "${transactionId}_${now}"
    file_format = "orc"
    sink_columns = ["name","age"]
    filename_time_format = "yyyy.MM.dd"
    is_enable_transaction = true
  }

Changelog

2.2.0-beta 2022-09-26

  • Add OSS Sink Connector

2.3.0-beta 2022-10-20

  • [BugFix] Fix the bug of incorrect path in windows environment (2980)
  • [BugFix] Fix filesystem get error (3117)
  • [BugFix] Solved the bug of can not parse '\t' as delimiter from config file (3083)