ReflectData | Java libs for auto-generating of JSON and SQL queries | Reflection library

by tabatsky Java Version: Current License: No License

X-Ray Key Features Code Snippets Community Discussions(8)Vulnerabilities Install Support

kandi X-RAY | ReflectData Summary

ReflectData is a Java library typically used in Programming Style, Reflection applications. ReflectData has no bugs, it has no vulnerabilities and it has low support. However ReflectData build file is not available. You can download it from GitHub.

Java libs for auto-generating of JSON and SQL queries based on reflection.

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Security

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Support

ReflectData has a low active ecosystem.

It has 6 star(s) with 2 fork(s). There are 4 watchers for this library.

It had no major release in the last 6 months.

ReflectData has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of ReflectData is current.

Quality

ReflectData has no bugs reported.

Security

ReflectData has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

ReflectData does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

Reuse

ReflectData releases are not available. You will need to build from source code and install.

ReflectData has no build file. You will be need to create the build yourself to build the component from source.

Top functions reviewed by kandi - BETA

kandi has reviewed ReflectData and discovered the below as its top functions. This is intended to give you an instant insight into ReflectData implemented functionality, and help decide if they suit your requirements.

Runs some test
Connect to database
Generate INSERT query
Generate UPDATE query string
Converts this update into a prepared statement
Generate query list for alter table
Builds the list of prepared statements
Create a prepared statement
Sets function values
Set custom exception handler
Writes an exception to a file
Sets simple exception handler
Converts an Exception into a String
Select records from table
Extract data set from a ResultSet
Generate the SQL statement for the table
Create a PreparedStatement object for update statements
Send an exception to a developer
Generate SQL statement string

Get all kandi verified functions for this library.

ReflectData Key Features

No Key Features are available at this moment for ReflectData.

ReflectData Examples and Code Snippets

No Code Snippets are available at this moment for ReflectData.

Community Discussions

Trending Discussions on ReflectData

SerDe using Apache AVRO in JAVA

Deserializing objects in Avro with Map field returns values with wrong class

Importing data as Avro fails with Sqoop 1.4.7 and Hadoop 2.7.3

Unable to decode Custom object at Avro Consumer end in Kafka

Application Failed to Start Spring Boot

java.lang.NoSuchMethodException for init method in Scala case class

Generic Avro Serde using shapeless-datatype

Avro: ReflectDatumWriter does not output schema information

QUESTION

SerDe using Apache AVRO in JAVA

Asked 2021-Mar-20 at 15:14

I am trying to serialize and deserialize a list of JSON objects

Below is my JSON file

...

ANSWER

Answered 2021-Mar-20 at 15:14

Your code actually works, what you missed is to add a toString() method to your Document class.

Add something like this:

Source https://stackoverflow.com/questions/66708636

QUESTION

Deserializing objects in Avro with Map field returns values with wrong class

Asked 2020-Jan-04 at 15:40

Trying to serialize objects that contain a Map instance in Apache Avro and the string keys of the Map are being deserialized but values are deserialized as class Object.

Able to use a GenericDatumWriter with a GenericData.Record instance with the properties copied into it but need to serialize the objects directly without having to copy the Map properties into a temporary object just to serialize it.

...

ANSWER

Answered 2019-Dec-07 at 21:12

I think the easiest way is to add an annotation

Source https://stackoverflow.com/questions/59160086

QUESTION

Importing data as Avro fails with Sqoop 1.4.7 and Hadoop 2.7.3

Asked 2019-Feb-12 at 01:10

I am dealing with issue where I am trying to import vast amount of data from on-premise PostgreSQL slave-replica to Google Cloud Storage in Avro-format using Apache Sqoop.

Importing data with default formats work just fine, but my datapipeline would require importing data into Avro format, however this keeps failing due to reason that has been reported many times in past, as an example:

I have tried to use argument -Dmapreduce.job.user.classpath.first=true as instructed in aforementioned questions, but the error is still:

java.lang.Exception: java.lang.NoSuchMethodError: org.apache.avro.reflect.ReflectData.addLogicalTypeConversion(Lorg/apache/avro/Conversion;)V

This method seems to be added on Avro v.1.8.0, but some dependencies are using older version of Avro where this is not available.

My environment has following versions of these tools:

Hadoop 2.7.3.2.6.3.0-235
Sqoop 1.4.7
javac 1.8.0_191
sqoop/lib/parquet-avro-1.6.0.jar
sqoop/lib/avro-1.8.1.jar
sqoop/lib/avro-mapred-1.8.1-hadoop2.jar

Has anyone still faced this same issue and adding -Dmapreduce.job.user.classpath.first=true to sqoop import doesn't solve the issue?

...

ANSWER

Answered 2019-Feb-12 at 01:10

I have encountered the same problem. My configuration is identical except I have Hadoop 2.9.2.

When I replaced the original

Source https://stackoverflow.com/questions/54461299

QUESTION

Unable to decode Custom object at Avro Consumer end in Kafka

Asked 2018-Nov-01 at 06:05

I have a concrete class which I am Serializing in Byte array to be sent to a Kafka topic. For serializing I am using ReflectDatumWriter . Before sending the bytes[] I am putting schema ID in first 4 bytes with schema ID after checking some online tutorial.

I am able to send the message but while consuming it in Avro console consumer I am getting response as :

./bin/kafka-avro-console-consumer --bootstrap-server 0:9092 --property schema.stry.url=http://0:8081 --property print.key=true --topic Test

...

ANSWER

Answered 2018-Nov-01 at 06:05

For serializing I am using ReflectDatumWriter . Before sending the bytes[] I am putting schema ID in first 4 bytes with schema ID

Not clear why you are trying to bypass the KafkaAvroSerializer class's default behavior. (In your case, remove Schema.Parser from that example, and use your Reflect record type rather than GenericRecord)

You can put your concrete class as the second type of the producer and as long as it implements the base Avro classes, it should be serialized correctly (meaning ID computed correctly, not some number you create, and converted to bytes), registered to the registry, then sent to Kafka

Most importantly, the schema ID is not necessarily a 1 in the registry, and by putting that, the console consumer might be trying to deserialize your messages incorrectly, resulting in the wrong output

In other words, try

Source https://stackoverflow.com/questions/52714165

QUESTION

Application Failed to Start Spring Boot

Asked 2018-Aug-28 at 13:34

I have one framework using Spring Boot which contains a controller RestController class ,

...

ANSWER

Answered 2018-Aug-28 at 12:29

A problem is that you are trying to use a bean kafkaStreams in your class DataController, but there is no bean with this name in Spring context. You need to create it manually, so you can autowire it later.

In your case I would suggest to update PipelineRunner.java like this:

Source https://stackoverflow.com/questions/52053928

QUESTION

java.lang.NoSuchMethodException for init method in Scala case class

Asked 2018-Jul-02 at 10:30

I am writing an Apache Flink streaming application that deserializes data (Avro format) read off a Kafka bus (more details on here). The data is being deserialized into a Scala case class. I am getting an exception when i run the program and it received the first message from Kafka

...

ANSWER

Answered 2018-Jul-02 at 10:30

The Avro serializer or more specifically the SpecificData requires the target type to have a default constructor (constructor with no arguments). Otherwise Avro cannot instantiate an object of the target type.

Try to add a default constructor via

Source https://stackoverflow.com/questions/51129809

QUESTION

Generic Avro Serde using shapeless-datatype

Asked 2018-May-25 at 17:53

I'm struggling creating a generic AvroSerde in Scala. I will be using this serde in combination with Flink therefore this serde should also be serializable itself. Avro doesn't have any native support for Scala, however there are some libraries which enable conversion from case classes to generic records using shapeless. Note: this generic serializer will only be instantiated with case classes.

Firstly, I tried to implement this serde using Avro4s. I got this compiled pretty easily by ensuring that the generic type was context bound to FromRecord and RecordFrom, however both FromRecord and RecordFrom aren't serializable therefore I can't use this serde in Flink.

Currently, I'm trying a different library shapeless-datatype which also uses shapeless. My current code looks like this:

...

ANSWER

Answered 2018-May-25 at 17:53

You should make Serializer a type class. (By the way, using vars without necessity is a bad practice.)

Source https://stackoverflow.com/questions/50525332

QUESTION

Avro: ReflectDatumWriter does not output schema information

Asked 2017-May-04 at 19:25

See the following sample code:

...

ANSWER

Answered 2017-May-04 at 19:25

I solved this myself, you need to use a DataFileWriter as this contains an entry in the create() method that writes the schema

Solution is to use this in conjunction with a ByteArrayOutputStream:

Source https://stackoverflow.com/questions/43784309

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install ReflectData

You can download it from GitHub.
You can use ReflectData like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the ReflectData component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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