对 Java Spring API 的 PATCH 请求

Question

i would like to make a PATCH request in the OpenShift API. To make it easier, we consider that we see this in the OpenShift API :

The content can be this :

{ 
  "limits":{ 
    "cpu":"10m"
  },
  "requests":{ 
    "memory":"1G"
  }
}

Or this :

{ 
  "limits":{ 
    "cpu":"30m",
    "memory":"2G"
  },
  "requests":{ 
    "memory":"5G"
  }
}

Or ..., You see what i mean ;) Keys from the Json can be or cannot be.

So now, i would like to know how to make a Patch without having to know what was in in the past, because the code will only the receive new values, empty or not.

I hope to be clear :) I use JDK 13 and Spring with Maven

Thanks

Answer 1

The answer : Get the old data by making a get method to the API which contains the old date. And then, i will be able to know changes for patching ! :)

Answer 2

The most appropriate solution seems to be making your requests as requests. Formatting Docs: http://jsonpatch.com/

In my example, I am updating the "image" property of my DeploymentConfig, but this should work for other kinds of objects. Note that you can make more than one patch command per request, and each patch command only needs to know about the properties making up the path you are altering.

My request setup: configurations docs

• Request: PATCH /apis/apps.openshift.io/v1/namespaces/$NAMESPACE/deploymentconfigs/$NAME
• Auth: Bearer $TOKEN

• Headers:

  • Content-Type: application/json-patch+json
  • Accept: application/json
  • Connection: close

• Body:

[
    {
        "op": "replace", 
        "path": "/spec/template/spec/containers/0/image", 
        "value": "my-repo-image.url/my-image:v10"
    },
    { "op": "add", ... },
    { "op": "remove", ...},
    ...
]