configast.apply

configast.apply(
   source as Item
) as the output, if any, from the functions of the Admin API

Summary

This function takes the Config AST representation of a server configuration for parsing and processing as a JSON object or XQuery map and applies the configuration using the functions of the Admin API.

Usage Notes

The Config AST builds the configurations with the same functions used in the Admin API. Namespaces are all predefined including the admin namespace for the Admin API functions. The final operation in the AST returns the output.

The JSON format of the Config AST is similar to the JSON format of the Optic AST.

• The top object is {"$config":[...]} in the Config AST where the top object is {"$optic":{...}} in the Optic AST.
• The $config property can take an array of declarations in the Config AST. The $optic property takes only a single chaining object (described below) in the Optic AST.
• In the Config AST, the first item in the array of declarations can be a {"ns":"op", "fn":"constdefs", "args":[...]} object that assigns constants. Subsequent items in the array can be chaining objects.
• The {"ns":"op", "fn":"operators", "args":[...}]} chaining object builds calls to the configuration building functions of the Admin API in the Config AST. The same chaining object builds calls to the Optic Query operations in the Optic AST.
• The vocabulary of the chained calls follows the vocabulary of the Config DSL in the Config AST. The vocabulary follows the vocabulary of the Optic Query DSL in the Optic AST.
• In the Config AST, a constant can be evaluated with a {"ns":"op", "fn":"constref", "args":["...constant name..."]} object to produce a value for a call or the final output from the Config AST.

Example

import module namespace configAST = "http://marklogic.com/config-ast-json"
	at "/MarkLogic/builder/config-ast-json.xqy";

configAST:apply('

    {"$config":[
        {"ns":"op", "fn":"constdefs", "args":[
          {"name":"db",  "value":{"ns":"xdmp",  "fn":"database",          "args":["Documents"]}},
          {"name":"cfg", "value":{"ns":"admin", "fn":"get-configuration", "args":[]}},
          {"name":"out", "value":{"ns":"map",   "fn":"entry",             "args":[
            "phrase",
            {"ns":"admin", "fn":"database-get-fast-phrase-searches", "args":[
              {"ns":"op", "fn":"constref", "args":["cfg"]},
              {"ns":"op", "fn":"constref", "args":["db"]}
              ]}
            ]}}
          ]},
        {"ns":"op", "fn":"constref", "args":["out"]}
        ]}

')
    

Example

import module namespace configAST = "http://marklogic.com/config-ast-json"
	at "/MarkLogic/builder/config-ast-json.xqy";

configAST:apply('

      {"$config":[
        {"ns":"op", "fn":"constdefs", "args":[
          {"name":"db",  "value":{"ns":"xdmp",  "fn":"database",          "args":["Documents"]}},
          {"name":"cfg", "value":{"ns":"admin", "fn":"get-configuration", "args":[]}},
          {"name":"out", "value":{"ns":"map",   "fn":"entry",             "args":[
            "phrase",
            {"ns":"admin", "fn":"database-get-fast-phrase-searches", "args":[
              {"ns":"op", "fn":"constref", "args":["cfg"]},
              {"ns":"op", "fn":"constref", "args":["db"]}
              ]}
            ]}}
          ]},
        {"ns":"op", "fn":"constref", "args":["out"]}
        ]}

')