Atlas client: Hello world application

In this post, I am going to use ‘atlas-client-v2’ library to print all the entity type names available in Atlas.

 

To use atlas client, we need to define atlas-application.properties file under src/main/resources folder.

 

atlas-application.properties

atlas.client.readTimeoutMSecs=30000
atlas.client.connectTimeoutMSecs=30000

 

Get an instance of AtlasClientV2.

AtlasClientV2 atlasClient = new AtlasClientV2(new String[] { "http://localhost:21000" }, new String[] { "admin", "admin" });

 

Define a search filter and get all type definitions.

SearchFilter searchFilter = new SearchFilter();

AtlasTypesDef atlasTypesDef = atlasClient.getAllTypeDefs(searchFilter);

 

Find the below working application.

 

HelloWorld.java

package com.sample.app;

import java.util.List;

import org.apache.atlas.AtlasClientV2;
import org.apache.atlas.AtlasServiceException;
import org.apache.atlas.model.SearchFilter;
import org.apache.atlas.model.typedef.AtlasEntityDef;
import org.apache.atlas.model.typedef.AtlasTypesDef;

public class HelloWorld {

  public static void main(String[] args) throws AtlasServiceException {
    AtlasClientV2 atlasClient = new AtlasClientV2(new String[] { "http://localhost:21000" },
        new String[] { "admin", "admin" });

    SearchFilter searchFilter = new SearchFilter();

    AtlasTypesDef atlasTypesDef = atlasClient.getAllTypeDefs(searchFilter);

    List<AtlasEntityDef> atlasEntityDefs = atlasTypesDef.getEntityDefs();

    for (AtlasEntityDef atlasEntityDef : atlasEntityDefs) {
      String typeName = atlasEntityDef.getName();
      System.out.println(typeName);

    }

  }
}

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