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Sessions Microservice

This is user sessions microservice from Pip.Services library. It opens and closes user sessions and stores sessiond data.

The microservice currently supports the following deployment options:

  • Deployment platforms: Standalone Process, Seneca
  • External APIs: HTTP/REST, Seneca
  • Persistence: Flat Files, MongoDB

This microservice has no dependencies on other microservices.

Quick Links:

Contract

Logical contract of the microservice is presented below. For physical implementation (HTTP/REST), please, refer to documentation of the specific protocol.

class SessionV1 implements IStringIdentifiable {
  /* Identification */
  String id;
  String user_id;
  String user_name;

  /* Session info */
  bool active;
  DateTime open_time;
  DateTime close_time;
  DateTime request_time;
  String address;
  String client;

  /* Cached content */
  var user;
  var data;
}

abstract class ISessionsV1 {
  Future<DataPage<SessionV1>> getSessions(
      String correlationId, FilterParams filter, PagingParams paging);

  Future<SessionV1> getSessionById(String correlationId, String id);

  Future<SessionV1> openSession(
      String correlationId,
      String user_id,
      String user_name,
      String address,
      String client,
      dynamic user,
      dynamic data);

  Future<SessionV1> storeSessionData(String correlationId, String sessionId, dynamic data);

  Future<SessionV1> updateSessionUser(String correlationId, String sessionId, dynamic user);

  Future<SessionV1> closeSession(String correlationId, String sessionId);

  Future closeExpiredSessions(String correlationId);

  Future<SessionV1> deleteSessionById(String correlationId, String sessionId);
}

Download

Right now the only way to get the microservice is to check it out directly from github repository

git clone git@github.com:pip-services-users/pip-services-sessions-dart.git

Pip.Service team is working to implement packaging and make stable releases available for your as zip downloadable archieves.

Run

Add config.yaml file to the root of the microservice folder and set configuration parameters.

Example of microservice configuration

---
# Container descriptor
- descriptor: "pip-services:context-info:default:default:1.0"
  name: "pip-services-sessions"
  description: "Sessions microservice for pip-services"

# Console logger
- descriptor: "pip-services:logger:console:default:1.0"
  level: "trace"

# Performance counters that posts values to log
- descriptor: "pip-services:counters:log:default:1.0"
  level: "trace"

{{#MEMORY_ENABLED}}
# In-memory persistence. Use only for testing!
- descriptor: "pip-services-sessions:persistence:memory:default:1.0"
{{/MEMORY_ENABLED}}

{{#FILE_ENABLED}}
# File persistence. Use it for testing of for simple standalone deployments
- descriptor: "pip-services-sessions:persistence:file:default:1.0"
  path: {{FILE_PATH}}{{^FILE_PATH}}"./data/sessions.json"{{/FILE_PATH}}
{{/FILE_ENABLED}}

{{#MONGO_ENABLED}}
# MongoDB Persistence
- descriptor: "pip-services-sessions:persistence:mongodb:default:1.0"
  collection: {{MONGO_COLLECTION}}{{^MONGO_COLLECTION}}sessions{{/MONGO_COLLECTION}}
  connection:
    uri: {{{MONGO_SERVICE_URI}}}
    host: {{{MONGO_SERVICE_HOST}}}{{^MONGO_SERVICE_HOST}}localhost{{/MONGO_SERVICE_HOST}}
    port: {{MONGO_SERVICE_PORT}}{{^MONGO_SERVICE_PORT}}27017{{/MONGO_SERVICE_PORT}}
    database: {{MONGO_DB}}{{#^MONGO_DB}}app{{/^MONGO_DB}}
  credential:
    username: {{MONGO_USER}}
    password: {{MONGO_PASS}}
{{/MONGO_ENABLED}}

{{^MEMORY_ENABLED}}{{^FILE_ENABLED}}{{^MONGO_ENABLED}}
# Default in-memory persistence
- descriptor: "pip-services-sessions:persistence:memory:default:1.0"
{{/MONGO_ENABLED}}{{/FILE_ENABLED}}{{/MEMORY_ENABLED}}

# Default controller
- descriptor: "pip-services-sessions:controller:default:default:1.0"

# Common HTTP endpoint
- descriptor: "pip-services:endpoint:http:default:1.0"
  connection:
    protocol: "http"
    host: "0.0.0.0"
    port: 8080

# HTTP endpoint version 1.0
- descriptor: "pip-services-sessions:service:http:default:1.0"

# Heartbeat service
- descriptor: "pip-services:heartbeat-service:http:default:1.0"

# Status service
- descriptor: "pip-services:status-service:http:default:1.0"

For more information on the microservice configuration see Configuration Guide.

Start the microservice using the command:

dart ./bin/run.dart

Use

The easiest way to work with the microservice is to use client SDK. The complete list of available client SDKs for different languages is listed in the Quick Links

If you use dart, then get references to the required libraries:

Add pip-services3-commons-dart, pip-services3-rpc-dart and pip-services_sessions packages

import 'package:pip_services3_commons/pip_services3_commons.dart';
import 'package:pip_services3_rpc/pip_services3_rpc.dart';

import 'package:pip_services_sessions/pip_services_sessions.dart';

Define client configuration parameters that match the configuration of the microservice's external API

// Client configuration
var httpConfig = ConfigParams.fromTuples(
	"connection.protocol", "http",
	"connection.host", "localhost",
	"connection.port", 8080
);

Instantiate the client and open connection to the microservice

// Create the client instance
var client = SessionsHttpClientV1(config);

// Configure the client
client.configure(httpConfig);

// Connect to the microservice
try{
  await client.open(null)
}catch() {
  // Error handling...
}       
// Work with the microservice
// ...

Now the client is ready to perform operations


    // Open new session
    try {
      var session1 = await client.openSession('123', '1', 'User 1', 'localhost', 'test', 'abc');
      // Do something with the returned session...
    } catch(err) {
      // Error handling...     
    }

// Get the session
try {
var session = await client.getSessionById(
    null,
    session1.id);
    // Do something with session...

    } catch(err) { // Error handling}

Acknowledgements

This microservice was created and currently maintained by

  • Sergey Seroukhov
  • Nuzhnykh Egor.

Libraries

pip_services_sessions