diffusion/src/node_modules/features/log-retrieval.js

Diffusion JavaScript client

var Services = require('services/services');
var Emitter = require('events/emitter');
var Result = require('events/result');
var EntriesFetchRequest = require('services/log-retrieval/entries-fetch-request');

module.exports = function LogRetrieval(internal){
    var FETCH_LOG_ENTRIES_SERVICE = internal.getServiceLocator().obtain(Services.FETCH_LOG_ENTRIES_SERVICE);

    // Returns Result<EntryFetchResponse>
    this.fetchEntries = function(firstEntry, entryCount) {
        var emitter = new Emitter();
        var result = new Result(emitter);

        if (internal.checkConnected(emitter)) {
            FETCH_LOG_ENTRIES_SERVICE.send(
                new EntriesFetchRequest(firstEntry, entryCount),
                function(err, response) {
                    if (err) {
                        emitter.error(err);
                    } else {
                        emitter.emit('complete', response);
                    }
                }
            );
        }

        return result;
    };
};