jsp+servlet simple message board based on javaweb+mysql (java+jsp+servlet+javabean+mysql+tomcat)

jsp + servlet simple message board based on javaweb + mysql (java + jsp + servlet + javabean + mysql + tomcat) Private message Source code acquisition and debugging communication Operating environment Java≥8, MySQL≥5.7, Tomcat≥8 development tools eclipse/idea/myeclipse/sts, etc. can be configured to run Be applicable Course design, major assignments, graduation projects, project exercises, learning […]

μC/OS-II—Message mailbox management 1 (os_mbox.c)

Directory Message mailbox creation Message mailbox deletion Waiting for a message in your mailbox Send a message to email Message mailbox creation OS_EVENT *OSMboxCreate (void *pmsg) {<!– –> OS_EVENT *pevent; #if OS_CRITICAL_METHOD == 3u /* Allocate storage for CPU status register */ OS_CPU_SR cpu_sr = 0u; #endif #ifdef OS_SAFETY_CRITICAL_IEC61508 \t if (OSSafetyCriticalStartFlag == OS_TRUE) {<!– […]

Springboot java introduces Mqtt to receive and send messages under the framework of the front and back separation version

This is just one of them, and it is a superficial method of receiving and sending messages. The synchronization mechanism needs to be communicated and confirmed with colleagues engaged in the Internet of Things to see if it can be implemented. Or if there are many devices, the synchronization mechanism will not be used. First, […]

[STM32] Several message reception filtering modes for STM32 CANFD peripherals

In Controller Area Network (CAN) systems, correctly configuring message filters is critical to effectively manage network communications. Especially when using the Flexible Data-rate Controller Area Network (FDCAN), choosing the appropriate filter type can greatly improve network efficiency and message processing speed. The CAN peripheral of the STM32G47x chip has the following reception message filtering methods: […]

Solution to the “red” message when running tensorfow

Problem display When running tensor, a large amount of “red” information often appears, as shown below: import tensorflow as tf x = tf.constant(1) print(x) code display 2023-11-12 17:39:04.668566: I tensorflow/core/common_runtime/gpu/gpu_device.cc:1561] Found device 0 with properties: pciBusID: 0000:01:00.0 name: GeForce MX250 computeCapability: 6.1 coreClock: 1.582GHz coreCount: 3 deviceMemorySize: 2.00GiB deviceMemoryBandwidth: 52.21GiB/s 2023-11-12 17:39:04.668943: I tensorflow/stream_executor/platform/default/dso_loader.cc:44] Successfully […]

The Tao of Git Commit: Standardized Commit Message Writing Guide

1 commit message specification The commit message format includes three parts: Header, Body and Footer <type>(<scope>): <subject> <body> <footer> Header is required, Body and Footer can be omitted. 1.1 Header Type (required) type is used to describe the category of git commit, and the following identifiers are allowed. feat:New function (Feature) “Feat” is used to […]

.NET quickly connects with Jiguang message push

What is push message? Many mobile APPs will push messages to users from time to time. For example, some news APPs will push news that the user may be interested in, or if the APP is updated, they will push messages to the user whether to choose to update, etc. This is the so-called ” […]

Publish and subscribe model implemented based on fixed-length blocking message queue [c++]

#include <iostream> #include <vector> #include <queue> #include <thread> #include <mutex> #include <condition_variable> #include <functional> #include <cstring> #include <chrono> // Custom message structure template <typename CallbackType> struct CustomMessage { CallbackType callback; void* data; size_t length; CustomMessage(CallbackType callback, void* data, size_t length) : callback(callback), data(data), length(length) {} CustomMessage() = default; // Add default constructor }; // message […]

How to handle rocketMq message accumulation

Message accumulation is common in the following situations: (1) The newly launched consumer function has a bug and messages cannot be consumed. (2) The consumer instance is down or temporarily unable to establish a connection with the Broker due to network problems. (3) Producers push a large number of messages to Broker in a short […]

MQTT protocol message broker service public network remote connection

Article directory Preface 1. Building Mosquitto on Linux 2. Install Cpolar on Linux 3. Create the MQTT service public network connection address 4. The client remotely connects to the MQTT service 5. Code calls MQTT service 6. Fixed connection TCP public network address 7. Fixed address connection test Foreword Mosquitto is an open source message […]