Add CloudWatch Alarms to A Lambda Function
Better monitoring your app.
Better monitoring your app.
aka, how to read a query plan
Identify performance bottlenecks
Unit convertion, e.g., Metric to imperial
some lambda related concepts
Version control your infrastructure is not a dream
Learn some React basics.
With Swagger Open API
Simplify infrastructure management
// todo
Servlet Container vs. Spring Containers (not finished yet)
Spring integrates Bean Validation and gives you more
Investigate and fix stopped @Scheduled methods in Spring.
Build Java application with AWS services
AWS Certified Solutions Architect - Associate, SAA-C01
SNS, SQS, etc.
CloudWatch, cloutTrail, etc.
Cognito, IAM, KMS, IDF, etc.
RDS, Aurora, DynamoDB, ElastiCache, DMS, EMR, Kinesis, etc.
VPC, CloudFront, Route 53, ALB, etc.
S3, Glacier, EBS, Stoarage Gateway, SnowX, etc.
EC2, Auto Scaling, ELB, Serverless, EB, ECS, CloutFormation, etc.
AWS SAA: Key Concepts
Use Swagger to document Spring boots porject’s APIs
Parse JSON using jq in the bash command line.
Upgrade Java, Spring Boot, Gradle, Flyway, etc.
Insert (not add) a column in PostgreSQL is quite a mission.
Got Spring Professional Certificated at Aug 2019
Should use Enums any time you need to represent a fixed set of constants
Powerful and highly customizable authentication and access-control.
Terms using in Unit Tests.
A Java object can be a JavaBean, a POJO and a Spring bean all at the same time.
Why is my session lost and created as new in every servlet request?
We should tag projects like NPM does.
Spring Security in Pivotal Spring Professional Certification (6%).
Spring OAuth2 101
Spring RestTemplate 101.
The cache size may be controlled by -XX:AutoBoxCacheMax=<size> option.
Still haven’t found a decent answer in StackOverFlow.
IDEA IntelliJ Config for Java
Spring test in Pivotal Spring professional certification (4%).
“Once,” said the Mock Turtle at last, with a deep sigh, “I was a real Turtle.” —Alice In Wonderland, Lewis Carroll
Spring REST in Pivotal Spring professional certification (6%).
Spring MVC in Pivotal Spring professional certification(8%).
Spring Data Management in Spring Professional Certification (16%).
Spring AOP in Spring Certification(8%).
Converting Date Time in Java
Spring Boot in Pivotal Spring professional certification (32%).
Spring Core in Spring Certification (20%).
Setup a project with Spring Boot and Angular.
I use final whenever it is appropriate.
Converting Json in Spring projects.
How to search text in your files in Linux?
Get out of nightmare that positioning elements with CSS.
return early and give up single exit point
Got an error: Cannot have a pipe in an action expression.
{“quote”:”You miss 100% of the shots you don’t take.”,”author”:”Wayne Gretzky”}
The jury is in. The controversy is over. The debate has ended. The conclusion is: TDD works.
Handle and view a 360 photo.
Lombok makes Java prettier, and your life easier.
Additional capabilities beyond core spring and JPA.
Behavior of String literals is very confusing.
The most conservative file naming conventions provide the most cross-platform compatibility.
I found one of my old notes… But still need to do more investigation. // todo
A Spring Demo project. See: https://github.com/digitalsonic/geektime-spring-family
Unit Testing in JavaScript
AWS does everything. This the first step.
Submits user’s data and sends data to a server.
I have no idea. It takes efforts.
Exceptions.
Design classes.
Methods and Encapsulation.
String and some common APIs.
Java Operators and Statements.
Java Building Blocks.
HashMap is fast.
Less NPE
JDBC is an API for connecting and executing queries on a database. Relatively low-level, it’s the foundation of most ORMs and other high-level data access l...
CouchDB is one of NoSQL database, uses JSON to store data, Javascript as its query language using MapReduce, and Http for an API.
Load Avg: 2.56, 2.26, 2.14
The method that constructs your object.
Essential commands to manipulate files and directories on Linux.
cURL is a command line tool for getting or sending files using URL syntax.
PostgreSQL Cheat Sheet.
How to quit vim? - -!
There must be a better way. But this is the one I’m currently using.
Set up and Run Junit in a Java project.
Test makes perfect.
So sorry that I falsely updated the database with the following script:
Watch my Youtube video to get details!
jQuery, live long and prosper!
These are my notes while using SQL Server 2016.
SQL Server Connection Strings.
Select the element(s)
Free Programming Resources.
A simple flowchart representing a process for dealing with a non-functioning lamp.
Git Commands
Preview your site and help troubleshoot failed Jekyll builds.