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Showing posts with label java. Show all posts
Showing posts with label java. Show all posts

Convert json to avro record Object in java

Introduction:


Avro is a popular data serialization system that offers efficient data exchange and storage capabilities. When working with Avro, you may encounter scenarios where you need to convert JSON data into Avro record objects. In this blog post, we will explore the process of converting JSON to Avro record objects, enabling you to seamlessly integrate JSON data into your Avro-based applications.

Step 1: Define the Avro Schema 
The first step is to define the Avro schema that corresponds to the structure of your JSON data. The Avro schema specifies the fields, data types, and hierarchy of the data. Ensure that the Avro schema accurately represents the JSON structure.

Step 2: Generate Code from the Avro Schema 
To convert JSON to Avro record objects, you'll need to generate code based on the Avro schema. There are various code generation tools available, depending on your programming language and development environment. For example, you can use the Avro Maven Plugin or the Avro Gradle Plugin if you are working with Java.

Invoke the code generation tool with the Avro schema as input, and it will generate classes or structures representing the Avro record objects based on the schema.

Step 3: Parse and Convert the JSON Data 
Next, you need to parse the JSON data and convert it into Avro record objects using the generated code. The specific code required for this step will depend on the programming language you are using.

In Java, for example, you can use the generated Avro record classes and the Jackson library to parse and convert JSON data. Here's an example of how to accomplish this:

import org.apache.avro.Schema;
import org.apache.avro.io.DatumReader;
import org.apache.avro.io.Decoder;
import org.apache.avro.io.DecoderFactory;
import org.apache.avro.specific.SpecificDatumReader;

import java.io.IOException;

public class JsonToAvroExample {

    public static void main(String[] args) {
        Example event = deserializeEvent(Example.class, "{}", Example.getClassSchema());
    }

    private static <T> T deserializeEvent(Class<T> clazz, String json, Schema schema)
            throws IOException {
        DatumReader<T> reader =
                new SpecificDatumReader<>(clazz);
        Decoder decoder =
                DecoderFactory.get().jsonDecoder(schema, json);
        return reader.read(null, decoder);
    }
}

Step 4: Testing the JSON to Avro Conversion 
To ensure that the conversion is working correctly, you should test the JSON to Avro conversion functionality. Prepare sample JSON data that matches the structure defined in the Avro schema. Use the deserializeEvent method, passing in the JSON data and the corresponding Avro schema. Validate that the resulting Avro record object contains the expected data.

Conclusion: 

Converting JSON to Avro record objects allows you to seamlessly incorporate JSON data into your Avro-based applications. By defining the Avro schema, generating code, and utilizing appropriate parsing and conversion techniques, you can efficiently transform JSON data into Avro record objects. Avro's flexibility and efficiency make it a powerful choice for data serialization. Integrate the steps outlined in this guide into your development workflow, and you'll be able to handle JSON to Avro conversions with ease.
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Top 6 Eclipse plugins in 2023


1. Docker editor

        Nowadays docker is used in most the top tech companies and this plugin helps you edit docker files in eclipse.


2. EclEmma Java Code Coverage

        EclEmma is a free Java code coverage tool for Eclipse, available under the Eclipse Public License. It brings code coverage analysis directly into the Eclipse workbench:

  • Fast develop/test cycle: Launches from within the workbench like JUnit test runs can directly be analyzed for code coverage.
  • Rich coverage analysis: Coverage results are immediately summarized and highlighted in the Java source code editors.
  • Non-invasive: EclEmma does not require modifying your projects or performing any other setup.


3. jAutodoc 

       JAutodoc is an Eclipse Plugin for automatically adding Javadoc and file headers to your source code. It optionally generates initial comments from element name by using Velocity templates for Javadoc and file headers. The main features are
  • Complete, keep or replace existing Javadoc
  • Create initial comments from element name
  • Getter/Setter comments from related field comment
  • Add/Replace file headers
  • Velocity templates for Javadoc and headers
  • Support for Package Javadoc
  • Search for missing Javadoc and file headers



4. SonarLint

        SonarLint is an IDE extension that helps you detect and fix quality issues as you write code. Like a spell checker, SonarLint squiggles flaws so they can be fixed before committing code. You can get it directly from the Eclipse Marketplace, and it will then detect new bugs and quality issues as you code (Java, JavaScript, PHP and Python).



5. Nodeclipse

        Nodeclipse Core & Node.js (nodeclipse-1) is Eclipse plugin for the Node.js. The purpose of Nodeclipse is to create environment in which Node.js development is easy for any user from beginner to professional.



6. YEdit

      YEdit is an Eclipse editor for editing YAML files.
It has the following features:
  • Syntax highlighting
  • Syntax checking
  • Content outline
  • Templates
  • Various text editing support like auto-indenting and toggling of comments.
  • Symfony compatibility mode.
  • Source formatting (experimental)



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How to switch branch in eclipse without losing workspace settings


You have checked out the required branch from git and would like to switch to a different branch using eclipse.

developer branch in the below example:

 

Now let’s make some changes to the existing file and add a file to depict workspace changes.





Now you would like to switch to another branch (developer2 in this example) without losing the changes done in your current workspace.

Select the Git perspective.

Right click on the git repository > Switch To > New Branch







In the “Create a new branch” window, click Select.





Select the branch you would like to switch to from “Remote Tracking”.

developer2 in the below example.



Check the “Configure upstream for push and pull” checkbox and select “Merge” from “When pulling” dropdown.

Uncheck the “Check out new branch” checkbox.

















Click Finish.



 
As you can see from the above image, we now have developer2 branch under Local.


All file changes and the new file are still intact and the branch has been switched to developer2 branch.

Note:
If you are not able to see the branches under “New Branch > Select”, please follow the below steps.

Go to Git perspective > Clone a Git repository

Enter the URL and credentials

In the “Branch Selection” window, select all the branches.


Click Next.


In the Local Destination selection window, select the required branch from “Initial branch” dropdown.

Click on Finish.

You will be able to see the selected initial branch under Local and all other branches under Remote Tracking.

 

Right Click on Working Tree > Import Projects > Finish.





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Will be posting twice a week on latest java libraries/frameworks which a developer needs to know in 2019.
Also will add the common errors and resolutions for the same.

Please feel free to comment if you need anything specific.

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