avsc | Avro for JavaScript zap | Serialization library
kandi X-RAY | avsc Summary
kandi X-RAY | avsc Summary
Pure JavaScript implementation of the Avro specification.
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Top functions reviewed by kandi - BETA
- Assemble a protocol .
- Initialize a new client .
- Combines the provided object of Record objects .
- Creates a new state of the underlying stream .
- A block .
- cycle generator
- Creates a new stateless channel .
- Chain middleware functions
- Import imports from a file
- Handle the completion of an error .
avsc Key Features
avsc Examples and Code Snippets
Community Discussions
Trending Discussions on avsc
QUESTION
I'm following How to transform a stream of events tutorial. Everything works fine until topic creation part:
Under title Produce events to the input topic:
...ANSWER
Answered 2022-Apr-05 at 13:42How can I register Avro file in Schema manually from CLI?
You would not use a Producer, or Docker.
You can use Postman and send POST request (or the Powershell equivalent of curl) to the /subjects endpoint, like the Schema Registry API documentation says for registering schemas.
After that, using value.schema.id, as linked, will work.
Or, if you don't want to install anything else, I'd stick with value.schema.file. That being said, you must start the container with this file (or whole src\main\avro folder) mounted as a Docker volume, which would not be referenced by a Windows path when you actually use it as part of a docker exec command. My linked answer referring to the cat usage assumes your files are on the same filesystem.
Otherwise, the exec command is being interpreted by Powershell, first, so input redirection won't work, and type would be the correct command, but $() syntax might not be, as that's for UNIX shells;
Related - PowerShell: Store Entire Text File Contents in Variable
QUESTION
My goal is to receive csv files in S3, convert them to avro, and validate them against the appropriate schema in AWS.
I created a series of schemas in AWS Glue Registry based on the .avsc files I already had:
...ANSWER
Answered 2021-Sep-17 at 17:42After some more digging I found the somewhat confusingly named get_schema_version() method that I had been overlooking which returns the SchemaDefinition:
QUESTION
This is the script I run on Hive:
...ANSWER
Answered 2022-Feb-10 at 16:11could you pls enclose them with backtick( `)
QUESTION
I have below avro schema User.avsc
ANSWER
Answered 2021-Sep-14 at 17:26Perhaps you can look at the datastream interface. The input parameter of the addSink function is of type SinkFunction, and the input parameter of the sinkTo function is Sink.
FileSink is implemented based on the Sink interface, you should use the sinkTo function
QUESTION
I'm trying to decode an .avro file loaded from a web server.
Since the string version of the uInt8Array starts with
"buffer from S3 Objavro.schema�{"type":"record","name":"Destination",..."
I assume it's avro Container File
I found 'avro.js' and 'avsc' as tools for working with the .avro format and javascript but reading the documentation it sound's like the decoding of a Container File is only possible in Node.js, not in the browser. (The FileDecoder/Encoder methods are taking a path to a file as string, not an uInt8Array)
Do I get this wrong or is there an alternative way to decode an .avro Container File in the browser with javascript?
...ANSWER
Answered 2021-Oct-26 at 11:36Luckily I found a way using avsc with broserify
QUESTION
Hey there StackOverflow community,
I have a question regarding nested Avro schemas, and what would be a best practice on how to store them in the schema registry when using them with Kafka.
TL;DR & Question: What’s the best practice for storing complex, nested types inside an Avro schema registry?
- a) all subtypes as a separate subject (like demonstrated below)
- b) a nested supertype as a single subject, containing all subtypes
- c) something different altogether?
A little context: Our schema consists of a main type that has a few complex subtypes (with some of the subtypes themselves having subtypes). To keep things clean, we moved every complex type to its own *.avsc file. This leaves us with ~10 *.avsc Files. All messages we produce have the main type, and subtypes are never sent separately.
For uploading/registering the schema, we use a gradle plugin. In order for this to work, we need to fully specify every subtype as a separate subject, and then define the references between them, like so (in build.gradle.kts):
ANSWER
Answered 2021-Nov-22 at 13:32Unfortunately, there doesn't seem to be a whole lot of information available on this topic, but this is what I found out regarding your options with complex Avro schemas:
- for simple schemas with few complex types, use Avro Schemas (
*.avsc) - for more complex schemas and loads of nesting, use Avro Interface Definitions (
*.avdl) - these natively support imports
So it would probably be worthwhile to convert the definitions to *.avdl. In case you insist on keeping your *.avsc style definitions, there are Maven plugins available for merging these (see https://michalklempa.com/2020/04/composing-avro-schemas-from-subtypes/).
However, the impression that I get is that whenever things get complex, it would be preferable to use Avro IDL. This blog post supports this hypothesis.
QUESTION
I have two Avro schema V1 and V2 which are read in spark as below:
...ANSWER
Answered 2021-Nov-20 at 22:18You alway have to decode Avro with the exact schema is is written in. This is because Avro uses untagged data to be more compact and requires the writers schema to be present at decoding time.
So, when you are reading with your V2 schema it looks for field three (or maybe the null marker for this field) and throws an error.
What you can do is map decoded data (decoded with the writers schema) to a reader schema, Java has an API for that: SpecificDatumReader(Schema writer, Schema reader).
Protocol Buffers or Thrift do what you want, the are tagged formats. Avro expects the schema to travel with the data, for example in an Avro file.
QUESTION
In the following CSV, I need to append new row values for it.
ID date balance 01 31/01/2021 100 01 28/02/2021 200 01 31/03/2021 200 01 30/04/2021 200 01 31/05/2021 500 01 30/06/2021 600Expected output:
ID date balance 01 31/01/2021 100 01 28/02/2021 200 01 31/03/2021 200 01 30/04/2021 200 01 31/05/2021 500 01 30/06/2021 600 01 30/07/2021 999Java code:
...ANSWER
Answered 2021-Nov-11 at 21:14You're looking for the Flatten transform. This takes any number of existing PCollections and produces a new PCollection with the union of their elements. For completely new elements, you could use Create or use another PTransform to compute the new elements based on the old ones.
QUESTION
Apache Beam update values based on the values from the previous row
I have grouped the values from a CSV file. Here in the grouped rows, we find a few missing values which need to be updated based on the values from the previous row. If the first column of the row is empty then we need to update it by 0.
I am able to group the records, But unable to figure out a logic to update the values, How do I achieve this?
Records
customerId date amount BS:89481 1/1/2012 100 BS:89482 1/1/2012 BS:89483 1/1/2012 300 BS:89481 1/2/2012 900 BS:89482 1/2/2012 200 BS:89483 1/2/2012Records on Grouping
customerId date amount BS:89481 1/1/2012 100 BS:89481 1/2/2012 900 BS:89482 1/1/2012 BS:89482 1/2/2012 200 BS:89483 1/1/2012 300 BS:89483 1/2/2012Update missing values
customerId date amount BS:89481 1/1/2012 100 BS:89481 1/2/2012 900 BS:89482 1/1/2012 000 BS:89482 1/2/2012 200 BS:89483 1/1/2012 300 BS:89483 1/2/2012 300Code Until Now:
...ANSWER
Answered 2021-Nov-11 at 15:01Beam does not provide any order guarantees, so you will have to group them as you did.
But as far as I can understand from your case, you need to group by customerId. After that, you can apply a PTransform like ParDo to sort the grouped Rows by date and fill missing values however you wish.
Example sorting by converting to Array
QUESTION
Can anyone help me to deserialize the avro file in react? I tried with avsc npm package but I am now stuck on error.
...ANSWER
Answered 2021-Nov-08 at 15:17That error was because the createFileDecoder function requires another parameter { codecs } Anyway, I read the avro file with createBlobDecoder. This is what I did.
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