REST-101

Question 1

Which is the default factory to create the RestTemplate?

Answer 1

ClientHttpRequestFactory

Question 2

What is GingerBread?

Answer 2

It is Google API for RTemp

Question 3

Does RTemp supports GZIP Compression trxn

Answer 3

Yes

Question 4

What is Google GSON

Answer 4

It is a Object to JSON marshalling

Question 5

What is required for RTemp construction?

Answer 5

A MessageConvertor and a factory, Offcourse both choice has defaults set

Question 6

What is the default Exception Handler ?

Answer 6

RestClientException

Question 7

Does all HTTP methods throws REstClientException?

Answer 7

Yes

Question 8

How do RTemp supports the GZIP compression?

Answer 8

By adding Accept-Encoding in the headers

Question 9

For all HTTP methoda what are the general return types?

Answer 9

T, ResponseEntity, URI,

Question 10

Just say the different Methid types?

Answer 10

GET, PUT, POST, OPTIONS, HEAD, POST

Question 11

Why we require HttpMessageConverter

Answer 11

The Object are to and from converted to HTTPRequest to HTTPResponse

Question 12

Say the methods of HttpMessageConverter?

Answer 12

boolean canRead(Class> clazz , Mediatype type)
boolean canWrite(Class> clazz, MediaType type)
List getSupportedMediaTypes()
T read(Class> clazz, HttpInputMessage inputMessage) 
throws IOException, HttpMessageNotReadableException

T write(Class> clazz, HttpOutputMessage ouptputMessage) throws IOException, HttpMessageNotWritableException

Question 13

How can you register your own MessageConverter?

Answer 13

By using messageconverters prop

Question 14

Name the main MessageCoverters type?

Answer 14

ByteArrayHttpMessageConverter
StringHttpMessageConverter
ResourceHttpMessageConverter
XmlAwareFormHttpMessageConverter
FormHttpMessageConverter
SimpleXmlHttpMessageConverter
MappingJackson2HttpMessageConverter
MappingJacksonHttpMessageConverter

Question 15

Does by default all messagecoverters available?

Answer 15

Nope, by default, ByteArray,String & ResourceHttpMessageCoverter is available

Question 16

Generally which MessageConverters is used as interface?

Answer 16

HttpMessageConverter

Question 17

What does ByteArraymessageConverter does?

Answer 17

It supports the converter that read and write byte arrays ito and from Http Request-Response.

Question 18

What is the content-type for ByteArraymessageConverter ?

Answer 18

application/octet-stream

Question 19

Can we override the ByteArraymessageConverter meda type?

Answer 19

Yes you can override the supportedMedia Types and override getContentType(byte[])

Question 20

Whish converter helps for eriting to and fro for the form data in http request-response cycle?

Answer 20

FormHttpmessageConverter

Question 21

How does a form data is read -write in http request-response cycle?

Answer 21

MultiValueMap

Question 22

What is the content-type for FormHttpMessageConverter?

Answer 22

application/x-www-form-urlencoded

Question 23

How can we have XMLMessgaeConverter?

Answer 23

You can have XMLAwareFormHttpMessageConverter, add support through SourceHttpMessageConverter

Question 24

what is default way of showing all content-type

Answer 24

text/*, text/plain as output

Question 25

Which XMl Message Converter is used for simple xml

Answer 25

SimpleXMLHttpMessageConverter

Question 26

What is the content-type for SimpleXMLHttpMessageConverter?

Answer 26

application/*+xml

Question 27

Which HttpMessageConverter is used for JSON

Answer 27

MappingJackson[2]HttpMessageConverter

Question 28

How can we have a custom JSON reader /writer specific to a class??

Answer 28

Inject ObjectMapper

Question 29

What is the content-type for JSON

Answer 29

application/json

Question 30

Is GsonHttpMessageConveter is same as JSON Converter type?

Answer 30

Yes both supports application/json content-type, thus only use one always

Question 31

Can you write a basic code way for RTEMP?

Answer 31

``` String url = "" RestTemplate template = new RestTemplate() restTemplate().getMessageConverter(new StringHttpMessageConverter()) Stirng result = template.getForObject(url, String.class, "simplanameit") ```

Question 32

Write a code for GZIP Compressioin ?

Answer 32

Thr GZIp is sent through the String way but the accept-encoding header is required. Httpheaders headers = new HttpHeaders() headers.setAccpetEncoding(ContentCodingType.GZIP) Httpenetity<> entity = new HttpEnetity(requestHeaders) RestTemplate temp = new RestTemplate() template.gettMessageConverters.add(new StringHttpMessageConverter) ResponseEntity response = restTemplate.exchange(url, HhttpMethod.GET, requestEnety.Class, String.class)

Question 33

When do we use exchange method of RTemp?

Answer 33

When we have HttpEnetity and all

Question 34

What is HttpEntity

Answer 34

An Entity show an Http to be done , with header and body setted

Question 35

Does the Accept Encoding set by default?

Answer 35

Yes sometimes, and thus take care while impl, remeber World is hidden

Question 36

What extra do we have to do for HttpBasisaUTHENTICATION?

Answer 36

hTTPaUTHENTICATION authHeader = new HttpBasicAuthentication(username, password) ``` Httpheaders = header - new Httpheader(); requestHeaders.setAuthrorization(authHeaders)) HttpEnetity> entity = new HttpEnetity (requestHEaders) ``` same use exchange method