I am trying to parse response of rest https://jsonplaceholder.typicode.com/posts/1 to java object
class Response{
long id;
long userId;
String title;
String title;
}
I have mapped output variable Result to my global variable which is the object of custom class Response but it is not working out of the box.
Can anybody share a tutorial to achieve the same?
Related
I'm using Google's Flatbuffer. I've created a simple schema for C++ that just takes a name and ID as the fields. After creating the auto generated code and running the fields through the CreateDetails() function, how would I get the bytearray to pass into ActiveMQ? I've searched around but couldn't find much about the byte array.
My schema:
table details {
name:string;
id: int;
};
root_type details;
My .cpp application:
auto name = builder.CreateString("some text here");
auto id = 25;
auto detail = CreateDetails(builder, name, id);
builder.Finish(detail);
Now, from my understanding, the sample message should be serialized, but I'm not sure how to grab the serialized data as a byte array. I was able to access the root and just go down the tree and look at the data, but I want to grab the entire message as a bytearray.
Please and thank you!
builder.GetBufferPointer()
builder.GetSize()
I am trying to save data into the dynamoDb but that data contains some Map attributes as well.But I am getting error while saving that data. Following is my domain class which I am using for saving data from request:
#DynamoDBTable(tableName = "ottMiddleware_rails")
public class RailsCmsDomain {
#DynamoDBHashKey(attributeName = "railId")
private String railId;
#DynamoDBTyped
#DynamoDBAttribute(attributeName = "railLogic")
private Map<String, Object> railLogic;
#DynamoDBAttribute(attributeName = "railSourceType")
private String railSourceType;
#DynamoDBAttribute(attributeName = "railTitle")
private RailCmsTitleDomain railTitle;
#DynamoDBTyped
#DynamoDBAttribute(attributeName = "restrictions")
private Map<String, Object> restrictions;
I am giving the following request:
{
"railId": "railOne",
"railLogic": {
"programType": 1,
"railSourceUrl": "http://myUrl"
},
"railSourceType": "myRail",
"railTitle": {
"tam": "Raan Phan",
"def": "சிறப்பு கட்டமைப்பு"
},
"restrictions": {
"clients": [
"abc",
"xyz"
],
"periodStart": 1506572217
}
}
I am using following code to save my data into the dynamoDb
public Boolean saveUpdateRailsDetails(RailsCmsDomain railsDomain) {
DynamoDBUtil dynamoDBUtil = new DynamoDBUtil();
AmazonDynamoDB dynamoDBClient = dynamoDBUtil.getDynamoDBClient();
DynamoDBMapper mapper = new DynamoDBMapper(dynamoDBClient);
mapper.save(railsDomain);
return true;
}
Please suggest how can I save map into dynamoDb. I am taking data as map because in later stages there are chances more data can be added to those attributes which are map and that data can be of any data type. I am getting following error:
errorMessage": "not supported; requires #DynamoDBTyped or
#DynamoDBTypeConverted"
"errorType":
"com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBMappingException"
I would like to post this answer as an option though it is not going to store the data as map in DynamoDB. However, it will resolve the error.
You can define the restrictions attribute as mentioned below. It will store the data as JSON string in DynamoDB.
#DynamoDBTypeConvertedJson
private Map<String, Object> restrictions;
Drawbacks:-
When you would like to update the restrictions attribute, you need to get the current value from database, update it and save the data in database.
DynamoDB data:-
restrictions attribute saved as JSON string.
When I needed to store map in dynamodb I just annotated the getter method of the map with #DynamoDBTypeConverted(converter = MapConverter.class) and in the converter just serialized the map into a json string, this way you can retrieve the map and everything but are not going to be able to use it in queryExpressions if you need.
So in case you want to be able to query the objects in the map maybe consider annotating the object you are using in your map with #DynamoDBDocument this way it's going to be automatically serialized by dynamodb as a document and use Set instead of map into your parent object.
The problem is that the DynamoDB Mapper doesn't know how to marshall/unmarshall the Object in this line:
private Map<String, Object> railLogic;
If you don't want to change Object to String, then use the DynamoDBTypeConverted annotation to provide a custom marshaller for Map<String, Object> which you can then (probably) reuse for restrictions. Relevant documentation here.
I am passing an Employee Object Form Client in RestFul webservices Jaxrs2/jersy2
#GET
#Path("{empObj}")
#Produces(MediaType.APPLICATION_XML)
public Response readPK(#PathParam("empObj")Employee empObj) {
//do Some Work
System.out.println(empObj.getName());
return Response.status(Response.Status.OK).entity(result).build();
}
how can achive this object using GET method??
thanx in advance
By using #PathParam on a method parameter / class field you're basically telling JAX-RS runtime to inject path segment (usually string) to your (String) parameter. If you're sending an object (Employee) representation directly via your URI (query param, path param) you should also provide ParamConverterProvider. Beware that this is not possible in some situation and it's not a recommended practice. However, if you're sending the object from client to server in message body, simply remove #PathParam and MessageBodyReader will take care of converting input stream to your type:
#GET
#Path("{empObj}")
#Produces(MediaType.APPLICATION_XML)
public Response readPK(Employee empObj) {
//do Some Work
System.out.println(empObj.getName());
return Response.status(Response.Status.OK).entity(result).build();
}
i'm having problems transfering a custom object to the client. How can i transfer a custom object to the client and receive it back to the webservice? i'm transferring a file by chunks. i want to know how i should write my client. i tried passing it as MediaType.APPLICATION_JSON in client but i get no result meaning it doesn't get passed back to the webservice. Below is a bit of code im working on.
Webservice
#POST
#Path("/fileTransfer")
#Consumes({MediaType.APPLICATION_JSON})
#Produces({MediaType.APPLICATION_JSON})
public final TransferInfomation transferInfo(final FileModel file)
{
...
}
...(some code)(lets just say a syso)
FileModel Class
public class FileModel {
private String fileID;
private DataHandler dataHandler;
/**
* Constructor.
*/
public FileModel() {
}
(lets assume setters and getters are made)
(Not sure if the webservice is correct). Still learning REST, i want to know how the client should be.
thanks in advance.
A good way to "marshal" and "unmarshal" "custom objects" (in JSON, XML, etc.) in Jersey is to use JAXB (https://jaxb.java.net/).
To do this you need to create a "jaxb class", with the proper getters and setters (and annotations), e.g.:
import javax.xml.bind.annotation.XmlRootElement;
#XmlRootElement
public class FileModel{
private String fileID;
private DataHandler dataHandler;
public String getFileID(){
return fileID;
}
public void setFileID(String fileID){
this.fileID = fileID;
}
public DataHandler getDataHandler(){
return dataHandler;
}
public void setDataHandler(DataHandler dataHandler){
this.dataHandler = dataHandler;
}
}
Do not forget to declare the #XmlRootElement. Then you can simply declare and use these objects in your API endpoints (methods):
#POST
#Path("/fileTransfer")
#Consumes({MediaType.APPLICATION_JSON})
#Produces({MediaType.APPLICATION_JSON})
public final FileModel transferInfo(FileModel file)
{
// read file in "FileModel" format
// ... make several operations
// return new FileModel (or another format if you will)
}
This should work. Make sure you follow the data structure defined for FileModel correctly in the client side. See here a example on how to handle that in Jersey: How do I POST a Pojo with Jersey Client without manually convert to JSON? (where JAXB is also used).
Your REST endpoint indicates you want to consume and produce JSON. So the REST client needs to send JSON that can be deserialized into FileModel, and the TransferInfomation returned by transferInfo needs to be serialized into JSON to return to the client.
Typically, Java REST frameworks like RESTEasy, Restlet, Camel, and Spring MVC provide facilities that let you define a JSON serializer/deserializer like Jackson and the mapping rules from JSON <--> Java, and the framework handles the details for you.
So if you use one of these frameworks, you will just have to configure them to use the preferred JSON tool and define the rules.
You can achive this like below:
Server Side:
#PUT
#Consumes(MediaType.APPLICATION_XML)
#Produces(MediaType.APPLICATION_XML)
public String addRecord(CustomClass mCustomClass)
{
///
///
///
return "Added successfully : "+CustomClass.getName();
}// addRecord
Client Side:
public static void main(String[] args)
{
///
///
///
CustomClass mCustomClass = new CustomClass();
Client client = ClientBuilder.newClient();
String strResult = client.target(REST_SERVICE_URL).request(MediaType.APPLICATION_XML).put(Entity.xml(mCustomClass), String.class);
}
Im trying to execute/consume a webservice and wondering if I am using the correct data type to return the results. String seems to work, but I receive an empty string. The service should be returning a simple string value without XML. There is a working version written in JS below, I have been asked to recreate it in Apex.
JS version (Working) - executed when a button is clicked
{!REQUIRESCRIPT("/soap/ajax/24.0/connection.js")}
{!REQUIRESCRIPT("/soap/ajax/24.0/apex.js")}
var xfolder = "TestFolder"
var parentid = "22K22"
var myvar = sforce.apex.execute("myWS","invokeWs", {folderName:xfolder,ObjectID:parentid});
window.alert('LiveLink folder created: ' + myvar);
APEX version (not working)
public with sharing class myTest {
public String getWSXMLResult() {
String tmpFolderName2 = 'TestFolder';
String tmpObjectID2 = '22K22';
String myWSXMLResult = myWS.invokeWs(tmpFolderName2,tmpObjectID2);
System.debug('XIXWS|' + myWSXMLResult);
return myWSXMLResult;
}
}
One thing I just noted while typing this out. I didn't specify the argument names for invokeWs, just the values..do I need to specify those values in the call to the WS? Such as..
myWS.invokeWs(folderName=tmpFolderName2,ObjectID=tmpObjectID2); -- this errors out btw
Thanks again everyone.