Programmer Think

order This paper mainly studies the priority of artemis message priority activemq-artemis-2.11.0/artemis-core-client/src/main/java/org/apache/activemq/artemis/core/message/impl/CoreMessage.java public class CoreMessage extends RefCountMessage implements ICoreMessage { //...... protected byte priority; public byte getPriority() { ...

Background introduction Scan the specified log directory every hour, empty the file directly after it exceeds 100M, and use it as a temporary means of operation and maintenance. The source code is mainly composed of two functions: reviewLogs() determines the log size and clears it; getdir() determines whether it is a dire ...

order This paper focuses on the scheduled delivery time of artemis HDR_SCHEDULED_DELIVERY_TIME activemq-artemis-2.11.0/artemis-core-client/src/main/java/org/apache/activemq/artemis/core/message/impl/CoreMessage.java public class CoreMessage extends RefCountMessage implements ICoreMessage { //...... @Override public Long getScheduledD ...

order This paper mainly studies the push-pull mode of artemis messages Pull mode receive activemq-artemis-2.11.0/artemis-jms-client/src/main/java/org/apache/activemq/artemis/jms/client/ActiveMQMessageConsumer.java public final class ActiveMQMessageConsumer implements QueueReceiver, TopicSubscriber { //...... @Override public Message ...

order This paper mainly studies the ExpiryScanner of artemis startExpiryScanner activemq-artemis-2.11.0/artemis-server/src/main/java/org/apache/activemq/artemis/core/postoffice/impl/PostOfficeImpl.java public class PostOfficeImpl implements PostOffice, NotificationListener, BindingsFactory { //...... private ExpiryReaper expiryReaperRun ...

Download and unzip the nexus package #This download version 2.14.3-02 can be updated to 3.13.0-01 # wget "https://sonatype-download.global.ssl.fastly.net/nexus/oss/nexus-2.14.3-02-bundle.tar.gz" # tar xfvz nexus-2.14.3-02-bundle.tar.gz Configuring nexus environment variables # cd /etc # vi profile i Enter edit ...

1, Prepare ZooKeeper Download the latest stable version from the official website: 3.5.6 . After downloading, extract it to the local location, find zoo_sample.cfg in the conf directory, rename it to zoo.cfg, and modify the data storage directory in it: #dataDir=/tmp/zookeeper dataDir=D:/hecg/apache-zookeeper-3.5.6-bin/data Start with git com ...

1. Introduction to CSV The full name of CSV is: Comma Separated Values or character separated values. Its files store tabular data (numbers and text) in plain text. A CSV file consists of any number of records separated by a line break character. Each record consists of fields. The separators between fields are other characters or strings, the ...

State & Fault Tolerance Stateful function s and operators for flow processing can store the calculation state of each Event in the flow calculation process. State computation is the construction of precise operation will not or lack of plate. Flink needs to know the status of the computing node, so ...

First of all, I'm lazy. I haven't recorded my work for a long time. I hope I don't forget my original intention. Recently, I have such a demand. We are equipment software companies. Therefore, one of the functions is to modify the IP and port of our own management interface. After the modification, ...