6.5.2 Arklet Architecture and Api Design

Overview

Arklet provides an operational interface for delivery of SofaArk bases and modules. With Arklet, the release and operation of Ark Biz can be easily and flexibly operated.

Arklet is internally constructed by ArkletComponent

ApiClient: The core components responsible for interacting with the outside world
CommandService: Arklet exposes capability instruction definition and extension
OperationService: Ark Biz interacts with SofaArk to add, delete, modify, and encapsulate basic capabilities
HealthService: Based on health and stability, base, Biz, system and other indicators are calculated

The collaboration between them is shown in the figure overview

Of course, you can also extend Arklet’s component capabilities by implementing the ArkletComponent interface

Command Extension

The Arklet exposes the instruction API externally and handles the instruction internally through a CommandHandler mapped from each API.

CommandHandler related extensions belong to the unified management of the CommandService component

You can customize extension commands by inheriting AbstractCommandHandler

Build-in Command API

All of the following instruction apis access the arklet using the POST(application/json) request format

The http protocol is enabled and the default port is 1238

You can set koupleless.arklet.http.port JVM startup parameters override the default port

Query the supported commands

URL: 127.0.0.1:1238/help
input sample:

{}

output sample:

{
    "code":"SUCCESS",
    "data":[
        {
            "desc":"query all ark biz(including master biz)",
            "id":"queryAllBiz"
        },
        {
            "desc":"list all supported commands",
            "id":"help"
        },
        {
            "desc":"uninstall one ark biz",
            "id":"uninstallBiz"
        },
        {
            "desc":"switch one ark biz",
            "id":"switchBiz"
        },
        {
            "desc":"install one ark biz",
            "id":"installBiz"
        }
    ]
}

Install a biz

URL: 127.0.0.1:1238/installBiz
input sample:

{
    "bizName": "test",
    "bizVersion": "1.0.0",
    // local path should start with file://, alse support remote url which can be downloaded
    "bizUrl": "file:///Users/jaimezhang/workspace/github/sofa-ark-dynamic-guides/dynamic-provider/target/dynamic-provider-1.0.0-ark-biz.jar"
}

output sample(success):

{
  "code":"SUCCESS",
  "data":{
    "bizInfos":[
      {
        "bizName":"dynamic-provider",
        "bizState":"ACTIVATED",
        "bizVersion":"1.0.0",
        "declaredMode":true,
        "identity":"dynamic-provider:1.0.0",
        "mainClass":"io.sofastack.dynamic.provider.ProviderApplication",
        "priority":100,
        "webContextPath":"provider"
      }
    ],
    "code":"SUCCESS",
    "message":"Install Biz: dynamic-provider:1.0.0 success, cost: 1092 ms, started at: 16:07:47,769"
  }
}

output sample(failed):

{
  "code":"FAILED",
  "data":{
    "code":"REPEAT_BIZ",
    "message":"Biz: dynamic-provider:1.0.0 has been installed or registered."
  }
}

Uninstall a biz

URL: 127.0.0.1:1238/uninstallBiz
input sample:

{
    "bizName":"dynamic-provider",
    "bizVersion":"1.0.0"
}

output sample(success):

{
  "code":"SUCCESS"
}

output sample(failed):

{
  "code":"FAILED",
  "data":{
    "code":"NOT_FOUND_BIZ",
    "message":"Uninstall biz: test:1.0.0 not found."
  }
}

Switch a biz

URL: 127.0.0.1:1238/switchBiz
input sample:

{
    "bizName":"dynamic-provider",
    "bizVersion":"1.0.0"
}

output sample:

{
  "code":"SUCCESS"
}

Query all Biz

URL: 127.0.0.1:1238/queryAllBiz
input sample:

{}

output sample:

{
  "code":"SUCCESS",
  "data":[
    {
      "bizName":"dynamic-provider",
      "bizState":"ACTIVATED",
      "bizVersion":"1.0.0",
      "mainClass":"io.sofastack.dynamic.provider.ProviderApplication",
      "webContextPath":"provider"
    },
    {
      "bizName":"stock-mng",
      "bizState":"ACTIVATED",
      "bizVersion":"1.0.0",
      "mainClass":"embed main",
      "webContextPath":"/"
    }
  ]
}

Query Health

URL: 127.0.0.1:1238/health

Query All Health Info

input sample:

{}

output sample:

{
  "code": "SUCCESS",
  "data": {
    "healthData": {
      "jvm": {
        "max non heap memory(M)": -9.5367431640625E-7,
        "java version": "1.8.0_331",
        "max memory(M)": 885.5,
        "max heap memory(M)": 885.5,
        "used heap memory(M)": 137.14127349853516,
        "used non heap memory(M)": 62.54662322998047,
        "loaded class count": 10063,
        "init non heap memory(M)": 2.4375,
        "total memory(M)": 174.5,
        "free memory(M)": 37.358726501464844,
        "unload class count": 0,
        "total class count": 10063,
        "committed heap memory(M)": 174.5,
        "java home": "****\\jre",
        "init heap memory(M)": 64.0,
        "committed non heap memory(M)": 66.203125,
        "run time(s)": 34.432
      },
      "cpu": {
        "count": 4,
        "total used (%)": 131749.0,
        "type": "****",
        "user used (%)": 9.926451054656962,
        "free (%)": 81.46475495070172,
        "system used (%)": 6.249762806548817
      },
      "masterBizInfo": {
        "webContextPath": "/",
        "bizName": "bookstore-manager",
        "bizState": "ACTIVATED",
        "bizVersion": "1.0.0"
      },
      "pluginListInfo": [
        {
          "artifactId": "web-ark-plugin",
          "groupId": "com.alipay.sofa",
          "pluginActivator": "com.alipay.sofa.ark.web.embed.WebPluginActivator",
          "pluginName": "web-ark-plugin",
          "pluginUrl": "file:/****/2.2.3-SNAPSHOT/web-ark-plugin-2.2.3-20230901.090402-2.jar!/",
          "pluginVersion": "2.2.3-SNAPSHOT"
        },
        {
          "artifactId": "runtime-sofa-boot-plugin",
          "groupId": "com.alipay.sofa",
          "pluginActivator": "com.alipay.sofa.runtime.ark.plugin.SofaRuntimeActivator",
          "pluginName": "runtime-sofa-boot-plugin",
          "pluginUrl": "file:/****/runtime-sofa-boot-plugin-3.11.0.jar!/",
          "pluginVersion": "3.11.0"
        }
      ],
      "masterBizHealth": {
        "readinessState": "ACCEPTING_TRAFFIC"
      },
      "bizListInfo": [
        {
          "bizName": "bookstore-manager",
          "bizState": "ACTIVATED",
          "bizVersion": "1.0.0",
          "webContextPath": "/"
        }
      ]
    }
  }
}

Query System Health Info

input sample:

{
  "type": "system",
  // [OPTIONAL] if metrics is null -> query all system health info
  "metrics": ["cpu", "jvm"]
}

output sample:

{
  "code": "SUCCESS",
  "data": {
    "healthData": {
      "jvm": {...},
      "cpu": {...},
//      "masterBizHealth": {...}
    }
  }
}

Query Biz Health Info

input sample:

{
  "type": "biz",
  // [OPTIONAL] if moduleName is null and moduleVersion is null -> query all biz
  "moduleName": "bookstore-manager",
  // [OPTIONAL] if moduleVersion is null -> query all biz named moduleName
  "moduleVersion": "1.0.0"
}

output sample:

{
  "code": "SUCCESS",
  "data": {
    "healthData": {
      "bizInfo": {
        "bizName": "bookstore-manager",
        "bizState": "ACTIVATED",
        "bizVersion": "1.0.0",
        "webContextPath": "/"
      }
//      "bizListInfo": [
//        {
//          "bizName": "bookstore-manager",
//          "bizState": "ACTIVATED",
//          "bizVersion": "1.0.0",
//          "webContextPath": "/"
//        }
//      ]
    }
  }
}

Query Plugin Health Info

input sample:

{
  "type": "plugin",
  // [OPTIONAL] if moduleName is null -> query all biz
  "moduleName": "web-ark-plugin"
}

output sample:

{
  "code": "SUCCESS",
  "data": {
    "healthData": {
      "pluginListInfo": [
        {
          "artifactId": "web-ark-plugin",
          "groupId": "com.alipay.sofa",
          "pluginActivator": "com.alipay.sofa.ark.web.embed.WebPluginActivator",
          "pluginName": "web-ark-plugin",
          "pluginUrl": "file:/****/web-ark-plugin-2.2.3-20230901.090402-2.jar!/",
          "pluginVersion": "2.2.3-SNAPSHOT"
        }
      ]
    }
  }
}

Query Health Using Endpoint

use endpoint for k8s module to get helath info

default config

endpoints exposure include: *
endpoints base path: /
endpoints sever port: 8080

http code result

HEALTHY(200): get health if all health indicator is healthy
UNHEALTHY(400): get health once a health indicator is unhealthy
ENDPOINT_NOT_FOUND(404): endpoint path or params not found
ENDPOINT_PROCESS_INTERNAL_ERROR(500): get health process throw an error

query all health info

url: 127.0.0.1:8080/arkletHealth
method: GET
output sample

{   
    "healthy": true,
    "code": 200,    
    "codeType": "HEALTHY",    
    "data": {        
        "jvm": {...},        
        "masterBizHealth": {...},        
        "cpu": {...},        
        "masterBizInfo": {...},        
        "bizListInfo": [...],        
        "pluginListInfo": [...]    
    }
}

query all biz/plugin health info

url: 127.0.0.1:8080/arkletHealth/{moduleType} (moduleType must in [‘biz’, ‘plugin’])
method: GET
output sample

{   
   "healthy": true,
   "code": 200,    
   "codeType": "HEALTHY",    
   "data": {        
       "bizListInfo": [...],  
       // "pluginListInfo": [...]      
   }
}

query single biz/plugin health info

url: 127.0.0.1:8080/arkletHealth/{moduleType}/moduleName/moduleVersion (moduleType must in [‘biz’, ‘plugin’])
method: GET
output sample

{   
   "healthy": true,
   "code": 200,    
   "codeType": "HEALTHY",    
   "data": {        
       "bizInfo": {...},  
       // "pluginInfo": {...}      
   }
}

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Last modified 2024.03.12: Create zhao_pin.md (52e3d01)