Oracle Control File

Article directory 1. Functions and characteristics 2. Control the location of files 3. File Update Mechanism 4. Actual combat: control file diversification (multiplexing) 5. Actual combat: backup and reconstruction of control files 6. Method of Restoring Control Documents 1. Functions and characteristics Record the curr ...

Posted on Mon, 22 Apr 2019 18:09:34 -0700 by vikette

Big Data Development Project-Telecom Project 2-Transmission Data

Article directory 1. Configuring flume files 2. Data Acquisition Part Gets Through 2.1 Start zookeeper and cluster 2.2 Start kafka cluster 2.3 Start flume Cluster 2.4 Production data 3 Data Consumption Environment Preparedness 3.1 Add maven configuration 3.2 Add maven configuration 4 Consumer Data Tools 4.1 PropertiesUti ...

Posted on Mon, 22 Apr 2019 18:06:34 -0700 by softnmedia

Register Bean s with Containers in Spring

First we need to understand what Ioc is. Ioc is one of Spring's core technologies, full name is Inversion of Control. The most primitive way to create objects is through new (by writing code manually): new Hollow(); Spring provides Ioc containers for object creation, configuration, management, destruction, etc. Control: Containers control and ...

Posted on Mon, 22 Apr 2019 18:00:33 -0700 by konsu

J.U.C | Synchronized Queue (CLH)

I. Write in front In the last part, we talked about the principle of AQS. See more about it. J.U.C|AQS Principle. Let's talk about the core synchronization queue (CLH) in AQS. 2. What is synchronous queue (CLH) Synchronous queue A FIFO bidirectional queue in which each node waits for the predecessor node to release the shared state (lock) to ...

Posted on Mon, 22 Apr 2019 17:48:35 -0700 by forcerecon

[Algorithms-Sorting] Cardinal Sorting

Radix sort is a non-comparative integer sorting algorithm. Its principle is to cut integers into different digits by digits, and then compare them by digits. Because integers can also express strings (such as names or dates) and floating-point numbers in a specific format, cardinal sorting is not limited to integers. Cardinal ...

Posted on Mon, 22 Apr 2019 17:36:35 -0700 by Lenbot

Threshold Segmentation of Images

Simple threshold segmentation of image using C++ and opencv Threshold segmentation of image color often does not know how appropriate the threshold setting is, so it needs constant testing. To solve this problem, a slider of threshold is set, so that the threshold can be quickly found by sliding slider. The most common thresh ...

Posted on Mon, 22 Apr 2019 17:18:34 -0700 by Ionisis

Java Learning Notes —— Preliminary: Java SE Exception Handling

6. Abnormal handling 01. Abnormal handling 02. Custom exception 03. Inspected and non-inspected anomalies Next article: [Common class library API](https://blog.csdn.net/qq_34114121/article/details/89384560) 01. Abnormal handling Basic concepts: Some instructions that prevent the current method or scope from continuing t ...

Posted on Mon, 22 Apr 2019 16:54:33 -0700 by pelleas1022

Concurrent HashMap Source Code Analysis of the Basic Series of java (based on jdk1.8)

1. Prerequisites Before reading this blog, I hope you already understand HashMap, otherwise you can refer to this blog: jdk1.8 Source Code Analysis-hashMap In addition, you have a certain understanding of CAS operations in java, because cas-related operations are widely used in this class to ensure thread safety. 2. Overview The Concurrent H ...

Posted on Mon, 22 Apr 2019 16:51:33 -0700 by python_q

React Hooks Analysis: Advancement

Welcome to my public number, Talk, for my latest article: I. Preface React Hooks is another pioneering new feature introduced from v16.8. When I first learned about this feature, I really had the feeling of being open-minded and discovering the New World. I am deeply impressed by the creativity and excellence of the React team. In addition to i ...

Posted on Mon, 22 Apr 2019 16:39:34 -0700 by AlGale

[Android] A Simple Local Music Player

Preface Github: Demo Download The main functions are as follows: 1. Desktop Widget, which can switch songs, pause/start playing, display song title and singer name 2. When switching songs, there is a system bar prompt to quickly navigate back to the playback interface. 3. Search for music files in SD card and add them to ...

Posted on Mon, 22 Apr 2019 16:24:33 -0700 by albertramsbottom