Debug RestTemplate Post request
java, json, rest, resttemplate, spring
Solution
You can set breakpoint in `AbstractHttpMessageConverter` at the end of the `public final void write(final T t, MediaType contentType, HttpOutputMessage outputMessage)` method, and evaluate `outputMessage.getBody()`
Problem
I am trying to `POST` to a `REST-API` using `RestTemplate` in `Spring`. Here is the code I am using: ``` //Code to Post data using Rest Template List<UserVO> userList = getUsers(); RestRequestVO submitRequestData = new RestRequestVO(); submitRequestData.setAction("update"); submitRequestData.setType("user"); submitRequestData.setItems(items); ResponseEntity<String> resposne = restTemplate.postForEntity(putUserUrl, submitRequestData, String.class); String message = resposne.getBody(); //The structure of class public class RestRequestVO { private String action; private String type; private List<UserVO> items; //Setters and Getters } //Expected JSON { "action"="update", "type"="user", "items"=[ { //user1 }, {//user2} .... ] } ``` I need to debug this properly and see what is the exact JSON being sent to the REST server by `restTemplate.postForEntity(putUserUrl, submitRequestData, String.class);` line. I am using `Eclipse`. I have tried debugging code line by line. I have also tried setting log-level to `Debug`. UPDATE after following steps given in comments Below is my `log4j.xml`, I can not see any http logs related to REST Template. Please let me know if I have done some mistake. ``` <?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE log4j:configuration SYSTEM "log4j.dtd"> <log4j:configuration xmlns:log4j='http://jakarta.apache.org/log4j/'> <appender name="CA" class="org.apache.log4j.ConsoleAppender"> <layout class="org.apache.log4j.PatternLayout"> <param name="ConversionPattern" value="%d{dd MMM yyyy HH:mm:ss,SSS} - %5t - %5p - %l - %m%n" /> </layout> </appender> <appender name="FA" class="org.apache.log4j.FileAppender"> <param name="File" value="cw.log"/> <param name="Threshold" value="DEBUG"/> <layout class="org.apache.log4j.PatternLayout"> <param name="ConversionPattern" value="%d{dd MMM yyyy HH:mm:ss,SSS} - %5t - %5p - %l - %m%n" /> </layout> </appender> <logger name="log4j.logger.httpclient.wire" additivity="false" > <level value="DEBUG" /> <appender-ref ref="CA"/> </logger> <root> <level value="Debug" /> <appender-ref ref="CA" /> </root> </log4j:configuration> ``` I intend to print JSON which is being created from POJO before it is sent to REST POST URL.