The following code snippet:
GraphDatabaseService graphDb = new EmbeddedGraphDatabase("var/geo");
// Wrap it as a spatial db service
SpatialDatabaseService spatialDb = new SpatialDatabaseService(graphDb);
// Create the layer to store our spatial data
EditableLayer runningLayer = (EditableLayer) spatialDb.getOrCreateLayer("running", SimplePointEncoder.class, EditableLayerImpl.class, "lon:lat");
fails with the error:
Exception in thread "main" java.lang.ClassCastException: org.neo4j.collections.graphdb.impl.EmbeddedGraphDatabase cannot be cast to org.neo4j.kernel.GraphDatabaseAPI
at org.neo4j.cypher.ExecutionEngine.<init>(ExecutionEngine.scala:113)
at org.neo4j.cypher.javacompat.ExecutionEngine.<init>(ExecutionEngine.java:53)
at org.neo4j.cypher.javacompat.ExecutionEngine.<init>(ExecutionEngine.java:43)
at org.neo4j.collections.graphdb.ReferenceNodes.getReferenceNode(ReferenceNodes.java:60)
at org.neo4j.gis.spatial.SpatialDatabaseService.getSpatialRoot(SpatialDatabaseService.java:76)
at org.neo4j.gis.spatial.SpatialDatabaseService.getLayer(SpatialDatabaseService.java:108)
at org.neo4j.gis.spatial.SpatialDatabaseService.getOrCreateLayer(SpatialDatabaseService.java:202)
at com.bmt.contain.spatial.test.SpatialTest.main(SpatialTest.java:47)
I was trying to get the sample code from here to work, I have included the relevant import statements below, in case I am somehow importing the wrong version of a function.
import org.neo4j.collections.graphdb.impl.EmbeddedGraphDatabase;
import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.gis.spatial.EditableLayer;
import org.neo4j.gis.spatial.EditableLayerImpl;
import org.neo4j.gis.spatial.Layer;
import org.neo4j.gis.spatial.encoders.SimplePointEncoder;
Can someone advise me?
Also, its 2.0.1 for both neo4j and v13 for spatial.
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j-spatial</artifactId>
<version>0.13-neo4j-2.0.1</version>
</dependency>
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j</artifactId>
<version>2.0.1</version>
</dependency>
So the answer to this question is that you need to use
GraphDatabaseService graphDb = new GraphDatabaseFactory().newEmbeddedDatabase("var/geo");
instead of
GraphDatabaseService graphDb = new EmbeddedGraphDatabase("var/geo");
Somewhere under the hood this creates a different type of Embedded GDbS which doesnt cause a class cast exception.
Related
My job(Spark-Scala) is running fine in emr-5.36.0 using spark 2.4.8 and scala 2.11.
But I am getting below error while running the same job in emr-6.6.0 using spark 3.2.0 and scala 2.12.15
Exception in thread "main" java.lang.IncompatibleClassChangeError: Class org.json.JSONArray does not implement the requested interface java.lang.Iterable
As per my understanding below part of code is causing issue
*import scala.collection.JavaConverters._
val configJSON: JSONArray = fetchConfigs(configServerUri, configFiles)
configJSON.asScala.foreach(propertySource => {
propertySource.asInstanceOf[JSONObject].getJSONObject("source").toMap.asScala.foreach(kv => {
sparkAppConf.set(configReMap.getOrElse(kv._1, kv._1), kv._2.toString)
})*
I am using below dependency in pom for json:
<dependency>
<groupId>org.json</groupId>
<artifactId>json</artifactId>
<version>20220924</version>
</dependency>
And JSONArray is implementing the Iterable:
**public class JSONArray implements Iterable<Object>**
Note:The same code is running fine in local with spark 3.2.0 and scala 2.12.15.
I am new to rest assured automation framework, so need help. I have to automate a simple API wherein I send the request in body.
given().log().all().contentType("application/json").body(payload).when().log().all().post("THE
POST URL").then().log().all().assertThat().statusCode(200);
I have to read the request from json file, and I am able to read the request from the .json file successfully. But I want to parameterize the values, and unable to understand on how to parameterize the file. Following is the sample .json file:
{
"id" : 5,
"name" : "Harry"
}
I do not want to hardcode the values of id and name here, but instead parameterize them using data providers or any other method. Any pointers on the same would be helpful.
A good practice for API testing using Rest-Assured is POJO approach. It helps you avoid manipulating json file (one kind of hardcode)
Step 1: You define a POJO
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
#Data
#AllArgsConstructor
#NoArgsConstructor
public class Person {
private int id;
private String name;
}
I use lombok for generating verbose code.
Step 2: Create Data-provider method
#DataProvider(name = "create")
public Iterator<Person> createData() {
Person p1 = new Person(1, "Json");
Person p2 = new Person(2, "James");
Person p3 = new Person(3, "Harry");
return Arrays.asList(p1,p2,p3).iterator();
}
Step 3: Write test
#Test(dataProvider = "create" )
void test1(Person person) {
given().log().all().contentType(JSON)
.body(person)
.post("YOUR_URL")
.then().log().all().assertThat().statusCode(200);
}
You need to add 2 lib into your project classpath to make above code work.
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.20</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.13.0</version>
</dependency>
Jackson Object Mapper class given an error Spring mvc
All required jar already added no error in project like jackson-core-asl, jackson-core-2.2.3 and jackson-all 1.9.0 still getting error
Remove the unnecessary jackson-all and jackson-core-asl dependencies.
Include the only one jackson-databind that automatically de/serializes the objects.
<jackson.version>2.8.9</jackson.version>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.version}</version>
</dependency>
Don't forget to return the whole List<Demo> instead of String.
#RequestMapping(value="/getJson", method = RequestMethod.GET)
public List<Demo> listJsonList {
// ...
return alldatalist;
}
And please, next time copy-paste the source code as a text, not as the image :)
I am using hive 0.13.1 and hashing combination of keys using default hive hash function.
Something like
select hash (date,token1,token2, parameters["a"],parameters["b"], parameters["c"]) from table1;
I ran it on 150M rows. For 60% of the rows, it hashed it correctly. For the remaining rows, it gave 0. null or 1 as hash. I looked at the rows which resulted in bad hashes, I don't see anything wrong with the rows. What could be causing it?
The hash function returns 0 only when all supplied arguments are blank or null.
If you are familiar with Java then you may check implementation of hash function.
The hash function internally uses ObjectInspectorUtils.hashCode to get the hashCode for the supplied fields, use below java code snippet to test manually this issue:
import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorUtils;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorFactory;
import org.apache.hadoop.io.Text;
public class TestHash
{
public static void main( String[] args )
{
System.out.println( ObjectInspectorUtils.hashCode(null,PrimitiveObjectInspectorFactory.javaStringObjectInspector) );
System.out.println( ObjectInspectorUtils.hashCode(new Text(""),PrimitiveObjectInspectorFactory.javaStringObjectInspector) );
}
}
Maven dependencies required to run above program:
<dependency>
<groupId>org.apache.hive</groupId>
<artifactId>hive-exec</artifactId>
<version>2.1.0</version>
</dependency>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-common</artifactId>
<version>2.7.2</version>
</dependency>
I am learning spring 4.2.4 by writing some webapp code.The idea is to return json file by controller.
I have already posted my questions before couple of days ago and still no i could get the right suggestions for my case. I am trying all the suggestions given by stackoverfolow none of the suggestions could work for me. Here is my controller:
.....
#RequestMapping(value="/getmessages",method=RequestMethod.GET, produces="application/json")
#ResponseBody
public Map<String,Object> getMessage(Principal prinicipal){
List<Message>message=null;
if(prinicipal==null){
message=new ArrayList<Message>();
}
else{
String username=prinicipal.getName();
message=usersService.getMessage(username);
}
Map<String,Object> data= new HashMap<String,Object>();
data.put("message", message);
data.put("number", message.size());
System.out.println("message has to be her\n"+message);
System.out.println("Number message has to be her is..."+message.size());
return data;
}
the message content which is to be retrieved from mysql is propely displayed in console.
The problem is conversion to JSON and return the result. I have been trying by change the jackson 1.9.x jar to jackson-fasterxml-2.x and it does not work. All other possible configuration of servlete also does not work for me.
When I add jackson-fasterxml-databind ....it displays file download dialogue box for filename"getmessages". to download and save...
I am very grateful for your help.
Finally I have solved this problem as follow:
I changed my return type from MAP to String and I converted my MAP to String in side my CONTROLLER as:
Converting my Map to String:
ObjectMapper mapper = new ObjectMapper();
String jsonFromMap = mapper.writeValueAsString(data);
I have also changed my dependencies as:
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.2.3</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.2.3</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.2.3</version>
Inside #RequestMapping change
produces=application/json
to
produces=text/html
I think the problem is with browser unable to understand application/json and returning Map............
Any how I did what I want to do even-though I do not know how I did it!