Apache Avro File (JSON) - Import - 7.1

Talend Data Catalog Bridges

author
Talend Documentation Team
EnrichVersion
7.1
EnrichProdName
Talend Big Data Platform
Talend Data Fabric
Talend Data Management Platform
Talend Data Services Platform
Talend MDM Platform
Talend Real-Time Big Data Platform
EnrichPlatform
Talend Data Catalog

Note: This file format needs to be imported with the File System (CSV, Excel, XML, JSON, Avro, Parquet, ORC, COBOL Copybook), Apache Hadoop Distributed File System (HDFS Java API) or Amazon Web Services (AWS) S3 Storage bridges.

Bridge Requirements

This bridge:
  • requires Internet access to https://repo.maven.apache.org/maven2/ and/or other tool sites to download drivers into <TDC_HOME>/data/download/MIMB/. For more information on how to retrieve third-party drivers when the TDC server cannot access the Internet, see this article.

Bridge Specifications

Vendor Apache
Tool Name Avro File (JSON)
Tool Version 1.8.1
Tool Web Site https://avro.apache.org/
Supported Methodology [File System] Data Store (NoSQL / Hierarchical, Physical Data Model) via Java API on AVRO File
Multi-Model Harvesting
Incremental Harvesting
Data Profiling
Remote Repository Browsing for Model Selection

SPECIFICATIONS
Tool: Apache Avro File (JSON) version 1.8.1 via Java API on AVRO File
See https://avro.apache.org/
Metadata: [File System] Data Store (NoSQL / Hierarchical, Physical Data Model)
Bridge: Avro version 11.0.0

DISCLAIMER
This bridge requires internet access to https://repo.maven.apache.org/maven2/ (and exceptionally a few other tool sites)
in order to download the necessary third party software libraries into $HOME/data/download/MIMB/
(such directory can be copied from another MIMB server with internet access).
By running this bridge, you hereby acknowledge responsibility for the license terms and any potential security vulnerabilities from these downloaded third party software libraries.

OVERVIEW
This bridge imports metadata from Avro files using a Java API.
Note that this bridge is not performing any data driven metadata discovery, but instead reading the schema definition at the header (top) of the Avro file.

This bridge detects the following standard Avro data types:
https://avro.apache.org/docs/current/spec.html#schema_primitive

null - no value.
boolean - a binary value.
int - a 32-bit signed integer.
long - a 64-bit signed integer.
float - a single precision (32 bit) IEEE 754 floating-point number.
double - double precision (64-bit) IEEE 754 floating-point number.
bytes - sequence of 8-bit unsigned bytes.
string - Unicode character sequence.


Bridge Parameters

Parameter Name Description Type Values Default Scope
File Path to file to import FILE *.*   Mandatory
Miscellaneous Specify miscellaneous options identified with a -option followed by a value if required:

GENERAL OPTIONS
-m <Java Memory's maximum size>
1G by default on 64bits JRE or as set in conf/conf.properties, e.g.
-m 8G
-m 2500M

-j <Java Runtime Environment command line options>
This option must be the last one in the Miscellaneous parameter as all the text after -j is passed "as is" to the JRE, e.g.
-j -Dname=value -Xms1G

-jre <Java Runtime Environment full path name>
It can be an absolute path to javaw.exe on Windows or a link/script path on Linux, e.g.
-jre "c:\Program Files\Java\jre1.8.0_211\bin\javaw.exe"

-v <Environment variable value>
None by default, e.g.
-v var1=value1 -v var2="value2 with spaces"

-model.name <model name>
Override the model name, e.g.
-model.name "My Model Name"

-prescript <script name>
The script must be located in the bin directory, and have .bat or .sh extension.
The script path must not include any parent directory symbol (..).
The script should return exit code 0 to indicate success, or another value to indicate failure.
For example:
-prescript \"script.bat\"

FILE SYSTEM OPTIONS
-tps <Processing Thread Pool Size's maximum count>
By default 1, for e.g.
-tps 10

-tl <Processing Time Limit duration>
No limits by default. Time can be specified in seconds, minutes, or hours, e.g.
-tl 3600s
-tl 60m
-tl 1h

-fl <Processing File Limit count>
No limits by default, e.g.
-fl 100

-hadoop <Hadoop configuration options>
None by default, e.g.
-hadoop key1=val1;key2=val2

-fresh.partition.models
Use to import latest modified files when processing partitions defined in Partitioned directories parameter.

-subst <path> <new path>
Use to associate a root path part with a drive or another path, e.g.
-subst K: C:/test

-skip.download
Use to disable dependencies downloading and use only download cache

-disable.partitions.autodetection
Use this option to disable automatic partitions detection(when "Partition directories" option is empty)

DELIMITED FILE OPTIONS
-delimited.no_header
Delimited File's header by default, bridge automatically tries to detect headers while processing csv files(basing on header columns types), use this option to disable headers import(f.e. to hide sensitive data)

-delimited.top_rows_skip <number>
Delimited file's number of rows to skip while processing (0 by default), e.g.
-delimited.top_rows_skip 1

-delimited.extra_separators <comma separated separators>
Delimited file's extra delimiters (separators by default are ), e.g.
-delimited.extra_separators ~,||,|~

PARQUET FILE OPTIONS
-parquet.compressed.max.size=<value>
Ignore parquet archives with size bigger then defined with this option value (Default value is 10 000 000 bytes), e.g.
-parquet.compressed.max.size=10000000
STRING      

 

Bridge Mapping

Mapping information is not available