Sample for senecajs/senecajs.org/#74

index.js

// require seneca
var seneca = require('seneca')

// create the seneca instance
var si = seneca({log: 'silent'})
        // add a worker to parse string
        .add('command:parse,type:string', function (args, done) {
          done(null, JSON.parse(args.value))
        })

// create a function who send a parse command,
// with type and content as parameter
// if no service match the type, the content is returned
var parseOrReturnValue = function (type, content, cb) {
  si.act('command:parse', {type: type, value: content, default$: content}, cb)
}

// request with type string : it will be parsed by the service
parseOrReturnValue('string', '{"index":"foo","value":42}', function (err, res) {
  console.log('res string\t', err, res.index, res.value)
})


// request with type obj : the obj will be returned as it
parseOrReturnValue('obj', {index: 'bar', value: 404}, function (err, res) {
  console.log('res obj\t\t', err, res.index, res.value)
})