async _initSignal(Janus, session){
        let textPlugin;
        let stingId = Janus.randomString(5);
        let opaqueId = Number(new Date());

        let onSuccess = (pluginHandle) =>{
            textPlugin = pluginHandle;

            pluginHandle.send({
                message: {
                    request: 'setup'
                }
            });
        };

        let onMessage = (msg, jsep) => {
            let error = msg.error;

            if (error){
                this.trigger('exception', error);
            }

            if (jsep){

                let answer = {
                    jsep,
                    media: {
                        audio: false,
                        video: false,
                        data: true
                    },
                    success: (jsep) => {
                        textPlugin.send({
                            jsep,
                            message: {
                                request: 'ack'
                            }
                        });
                    },
                    error: this.onError.bind(this)
                };
                textPlugin.createAnswer(answer);
            }
        };

        let onDataOpen = (/*data*/) => {
            Janus.log("The DataChannel is available!");

            let transaction = Janus.randomString(12);
            let register = {
                textroom: 'join',
                transaction: transaction,
                room: this.textRoomId,
                username: stingId,
                display: stingId
            };

            textPlugin.data({
                text:  JSON.stringify(register),
                error: this.onError.bind(this)
            });
        };

        let onData = (data) =>{
            let json = JSON.parse(data);

            let eventName = json["textroom"];

            if (eventName === 'success'){
                exempleResolveFunction()
            }

            if (eventName === 'message'){
                exampleGetMessage(json);
            }
        };

        session.attach({
            plugin: "janus.plugin.textroom",
            opaqueId: opaqueId,
            success: onSuccess,
            error: this.onError.bind(this),
            onmessage: onMessage,
            ondataopen: onDataOpen,
            ondata: onData
        });
    }