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Kafka Client Java Example

 Full Example: https://github.com/shooeugenesea/study-practice/blob/kafka/src/main/java/examples/Main.java Create topic by Java private static void cr...

Kafka Client Java 範例

 完整範例: https://github.com/shooeugenesea/study-practice/blob/kafka/src/main/java/examples/Main.java 用 Java 建立 topic private static void createTopicIfNot...

Run Kafka by docker

 https://itnext.io/how-to-install-kafka-using-docker-a2b7c746cbdc Create network $ sudo docker network create kafka-net --driver bridge Install zookee...

用 Docker 跑 Kafka

 https://itnext.io/how-to-install-kafka-using-docker-a2b7c746cbdc 建立網路 $ sudo docker network create kafka-net --driver bridge 安裝 Zookeeper 容器 $ sudo d...

MongoDB config docker cluster

Start mongo and bind with interfacesudo docker run --name mongo1 -d -p 27017:27017 mongo --bind_ip_all --replSet rs1sudo docker run --name mongo2 -d -p 27018...

MongoDB Docker 叢集設定

啟動 mongo 並綁定網路介面sudo docker run --name mongo1 -d -p 27017:27017 mongo --bind_ip_all --replSet rs1sudo docker run --name mongo2 -d -p 27018:27017 mongo --bind...

MongoDB group

 $group to group data by specified attribute // prepare data> db.company.insertOne({"name":"A","foundYear":1980,"numberOfEmployee":50}){ "ackn...

MongoDB Group（分組）

 $group 依指定屬性分組資料 // prepare data> db.company.insertOne({"name":"A","foundYear":1980,"numberOfEmployee":50}){ "acknowledged" : true, "i...

MongoDB Compound Index

At first, schema in mongodb is as follows > db.users.find() { "_id" : ObjectId("5f6f162c432d41b06263640d"), "name" : "user12", "i" : 12, "age" : 27, "cre...

MongoDB 複合索引

首先，MongoDB 中的 schema 如下 > db.users.find() { "_id" : ObjectId("5f6f162c432d41b06263640d"), "name" : "user12", "i" : 12, "age" : 27, "createdAt" : ISODate(...