[實踐]apollo+MQTT協議發送與訂閱消息，測試工具用MQTTLents

參考：原文鏈接

寫在前面的話：
mac 本來實踐一下看看
先下載好MQTTLents和安裝java，此處不再贅述，可自行谷歌

---

實踐

1、下載apollo
https://archive.apache.org/dist/activemq/activemq-apollo/1.7.1/

2、解壓並啓動apollo

• 雙擊上面的可執行文件彈出terminal或在命令行執行如下命令，可能會有如下提示：沒有設置JAVA_HOME

xxxxxxx@localhost  /xxxxxxx/study/python3_demo  /Users/xxxxxxx/Downloads/apache-apollo-1.7.1/bin/apollo
Error: JAVA_HOME is not defined correctly.
  We cannot execute /System/Library/Frameworks/JavaVM.framework/Home/bin/java

• 設置JAVA_HOME：注意–此處sudo 修改/etc/profile是沒用的。必須修改~/.bash_profile。

 xxxxxxx@localhost  /xxxxxxx/study/python3_demo  vim ~/.bash_profile
......
export JAVA_8_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_201.jdk/Contents/Home
export JAVA_HOME=$JAVA_8_HOME
export PATH=$JAVA_HOME/bin:$PATH:.:$JMETER_HOME/bin:$PATH:~/Library/Python/2.7/lib/python/site-packages
......

• 使環境變量生效

 xxxxxxx@localhost  /xxxxxxx/study/python3_demo  source ~/.bash_profile

• 啓動apollo

 xxxxxxx@localhost  /xxxxxxx/study/python3_demo  
 /Users/wangjie/Downloads/apache-apollo-1.7.1/bin/apollo
usage: apollo [--log <log_level>] <command> [<args>]

The most commonly used apollo commands are:
    create           creates a new broker instance
    disk-benchmark   Benchmarks your disk's speed
    help             Display help information
    version          Displays the broker version

See apollo help <command>' for more information on a specific command.
# 啓動命令如下：create + 自動以name + broker目錄，缺一不可，否則會報錯
 xxxxxxx@localhost  /xxxxxxx/study/python3_demo  /Users/xxxxxxx/Downloads/apache-apollo-1.7.1/bin/apollo create myapollo /Users/xxxxxxx/Downloads/apache-apollo-1.7.1/broker
Creating apollo instance at: /Users/xxxxxxx/Downloads/apache-apollo-1.7.1/broker
Generating ssl keystore...

Warning:
JKS 密鑰庫使用專用格式。建議使用 "keytool -importkeystore -srckeystore keystore -destkeystore keystore -deststoretype pkcs12" 遷移到行業標準格式 PKCS12。

You can now start the broker by executing:

   "/Users/xxxxx/Downloads/apache-apollo-1.7.1/broker/bin/apollo-broker" run

Or you can run the broker in the background using:

   "/Users/xxxxx/Downloads/apache-apollo-1.7.1/broker/bin/apollo-broker-service" start

xxxxxxx@localhost  /xxxxxxx/study/python3_demo  /Users/xxxxxxx/Downloads/apache-apollo-1.7.1/broker/bin/apollo-broker run

    _____                .__  .__
   /  _  \ ______   ____ |  | |  |   ____
  /  /_\  \\____ \ /  _ \|  | |  |  /  _ \
 /    |    \  |_> >  <_> )  |_|  |_(  <_> )
 \____|__  /   __/ \____/|____/____/\____/
         \/|__|  Apache Apollo (1.7.1)


Loading configuration file '/Users/xxxxxxx/Downloads/apache-apollo-1.7.1/broker/etc/apollo.xml'.
INFO  | OS     : Mac OS X 10.14.3
INFO  | JVM    : Java HotSpot(TM) 64-Bit Server VM 1.8.0_201 (Oracle Corporation)
INFO  | Apollo : 1.7.1 (at: /Users/xxxxxxx/Downloads/apache-apollo-1.7.1)
INFO  | OS is restricting the open file limit to: 10240
INFO  | Starting store: leveldb store at /Users/xxxxxxx/Downloads/apache-apollo-1.7.1/broker/data
INFO  | Accepting connections at: tcp://0.0.0.0:61613
INFO  | Accepting connections at: tls://0.0.0.0:61614
INFO  | Accepting connections at: ws://0.0.0.0:61623/
INFO  | Accepting connections at: wss://0.0.0.0:61624/
INFO  | Administration interface available at: https://127.0.0.1:61681/
INFO  | Administration interface available at: http://127.0.0.1:61680/

4、瀏覽器打開：各種協議的端口如上
http://127.0.0.1:61680/ admin登錄進入管理頁面（用戶名和密碼admin/password），可以新增幾個topics。

ok了，看着apollo是可以了。

5、打開MQTTLens，連接apollo服務，相關注意事項都在圖中了

點擊下方保存後，進入如下界面，如果沒連接成功，左側myapollo的按鈕不是綠色而是紅色。下圖中的1和2就是之前在apollo頁面新增的，填寫好1之後一定要點擊右側的subscribe按鈕，會在下方生成一個類似消息打印的下拉框。然後在3輸入想要發送的message，就可以點擊右側2的publish發送消息了。這時候發送成功會在下方顯示成功的消息。如下圖：

6、值得一提的是：apollo目錄下有一個example，其中有個文件，可以雙擊點開然後也可以連接apollo，來發布和訂閱topic消息，從而可以和mqttlens互動，達到聊天室的功能。

雙擊上圖的index.html即可進入如下頁面：

8、未完待續…