Lei Xia

Sr. Software Engineer | Solution Architect

Writing code, Enjoying life, Building future

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Spring Boot Cassandra CRUD Example

July 26, 2023 · 837 words · 4 min

Apache Cassandra is an open source NoSQL distributed database trusted by thousands of companies for scalability and high availability without compromising performance.

[Reproduce] Web Application Security Problems

July 10, 2023 · 3831 words · 18 min

No software is 100% secure, it’s just that the problems haven’t been discovered yet.

In this article. I’ll share the top 10 Web Application Security Problems.

This article is reproduced from OWASP.

Understanding TCC in distributed transactions

June 4, 2023 · 910 words · 5 min

A distributed transaction is a database transaction in which two or more network hosts are involved.

As we know, network and hosts may unreachable due to some reasons, like power failure, hardware malfunction, etc.

In this article, I’ll share how to implement distributed transaction with TCC.

Implementing a sorted set by ordered array

May 6, 2023 · 1126 words · 6 min

A <code>Set</code> that further provides a total ordering on its elements. The elements are ordered using their natural ordering, or by a <code>Comparator</code> typically provided at sorted set creation time. The set’s iterator will traverse the set in ascending element order. Several additional operations are provided to take advantage of the ordering. (This interface is the set analogue of <code>SortedMap</code>.)

Oracle - SortedSet

Java provides a built-in SortedSet implementation, known as TreeSet. In this article, I’ll show how to implement a SortedSet by Ordered Array.

How to build a Finite State Machine to help business workflow

May 4, 2023 · 785 words · 4 min

This is the first article written in English. In this article, I’ll share how to build a Finite State Machine(FSM) to help business workflow transition, such as auditing.

A finite-state machine (FSM) or finite-state automaton (FSA, plural: automata), finite automaton, or simply a state machine, is a mathematical model of computation. It is an abstract machine that can be in exactly one of a finite number of states at any given time. The FSM can change from one state to another in response to some inputs; the change from one state to another is called a transition

Wikipedia - Finite-state machine


January 1, 1 · 0 words · 0 min


January 1, 1 · 0 words · 0 min