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Sampath Thennakoon sampathsl

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sampathsl / CustomErrorController.java
Created September 24, 2018 04:54
Spring boot overriding the default white label error page
@Controller
public class CustomErrorController implements ErrorController {
@RequestMapping("/error")
@ResponseBody
public String handleError(HttpServletRequest request) {
Integer statusCode = (Integer) request.getAttribute("javax.servlet.error.status_code");
Exception exception = (Exception) request.getAttribute("javax.servlet.error.exception");
return String.format("<html><body><h2>Sample Error Page</h2><div>Status code: <b>%s</b></div>"
+ "<div>Exception Message: <b>%s</b></div><body></html>",
@sampathsl
sampathsl / CommonErrorController.java
Created September 24, 2018 05:01
Spring boot overriding the white label error template
@Controller
public class CommonErrorController implements ErrorController {
@Autowired private ErrorAttributes errorAttributes;
public void setErrorAttributes(ErrorAttributes errorAttributes) {
this.errorAttributes = errorAttributes;
}
@RequestMapping(value = "error")
@sampathsl
sampathsl / ExceptionResponse.java
Created September 24, 2018 05:02
Spring boot overriding the default white label error template with custom object
public class ExceptionResponse {
private Integer status;
private String path;
private String errorMessage;
private String timeStamp;
private String trace;
public ExceptionResponse(int status, Map<String, Object> errorAttributes) {
@sampathsl
sampathsl / How to maintain multiple Java versions in your Linux machine
Last active October 25, 2018 15:54
# First copy extracted JDK folder to /usr/lib/jvm. (JAVA 7, 8, 9, 10, 11 .tar.gz files)
cd /usr/lib/jvm
ls -al
lrwxrwxrwx 1 root root 25 Jan 28 2018 default-java -> java-1.11.0-openjdk-amd64
lrwxrwxrwx 1 root root 21 Jan 28 2018 java-1.11.0-openjdk-amd64 -> java-11-openjdk-amd64
drwxr-xr-x 7 root root 4096 Jul 17 18:20 java-11-openjdk-amd64
drwxrwxr-x 8 test test 4096 Aug 14 23:50 jdk-10.0.2
@sampathsl
sampathsl / docker-commands
Created February 7, 2019 06:31
Sample
FROM adoptopenjdk/openjdk8-openj9:latest
VOLUME /tmp
ARG JAR_FILE
COPY ${JAR_FILE} app.jar
ENTRYPOINT ["java","-Djava.security.egd+file:/dev/./urandom","-jar","app.jar"]
------------------------------------------------------------------------------
FROM java:8
VOLUME /tmp
@sampathsl
sampathsl / TreapsInsertion.cpp
Created June 21, 2020 08:32
Treaps - Insertion
// base case
if (root == nullptr)
{
root = new TreapNode(data);
return;
}
// if given data is less than the root node, insert in the left subtree
// else insert in the right subtree
if (data < root->data)