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    1.1.0 • Public • Published

    Blob Attachments Microservice

    This is a blob attachments microservice from Pip.Services library. It records all documents that attached to a particilar blob. When last document is disattached, the blob gets removed.

    The microservice currently supports the following deployment options:

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

    This microservice has no dependencies on other microservices.

    Quick Links:


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

    class BlobAttachmentV1 implements IStringIdentifiable {
        public id: string;
        public references: ReferenceV1[];
    class ReferenceV1
        public id: string;
        public type: string;
        public name: string;
    interface IAttachmentsV1 {
        getAttachmentById(correlationId: string, id: string,
            callback: (err: any, attachment: BlobAttachmentV1) => void): void;
        addAttachments(correlationId: string, reference: ReferenceV1, ids: string[],
            callback?: (err: any, attachments: BlobAttachmentV1[]) => void): void;
        updateAttachments(correlationId: string, reference: ReferenceV1, oldIds: string[], newIds: string[],
            callback?: (err: any, attachments: BlobAttachmentV1[]) => void): void;
        removeAttachments(correlationId: string, reference: ReferenceV1, ids: string[],
            callback?: (err: any, attachments: BlobAttachmentV1[]) => void): void;
        deleteAttachmentById(correlationId: string, id: string,
            callback?: (err: any, attachment: BlobAttachmentV1) => void): void;


    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-infrastructure/pip-services-attachments-node.git

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


    Add config.json file to the root of the microservice folder and set configuration parameters. As the starting point you can use example configuration from config.example.yml file.

    Example of microservice configuration

    descriptor: "pip-services-container:container-info:default:default:1.0"
      name: "pip-services-attachments"
      description: "Attachments microservice"
    descriptor: "pip-services-commons:logger:console:default:1.0"
      level: "trace"
    descriptor: "pip-services-attachments:persistence:file:default:1.0"
      path: "./data/attachments.json"
    descriptor: "pip-services-attachments:controller:default:default:1.0"
    descriptor: "pip-services-attachments:service:http:default:1.0"
        protocol: "http"
        host: ""
        port: 8080

    For more information on the microservice configuration see Configuration Guide.

    Start the microservice using the command:

    node run


    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 Node.js then you should add dependency to the client SDK into package.json file of your project

        dependencies: {
            "pip-clients-attachments-node": "^1.0.*"

    Inside your code get the reference to the client SDK

    var sdk = new require('pip-clients-attachments-node');

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

    // Client configuration
    var config = {
        connection: {
            protocol: 'http',
            host: 'localhost', 
            port: 8080

    Instantiate the client and open connection to the microservice

    // Create the client instance
    var client = sdk.AttachmentsHttpClientV1(config);
    // Connect to the microservice
    client.open(null, function(err) {
        if (err) {
            console.error('Connection to the microservice failed');
        // Work with the microservice

    Now the client is ready to perform operations

    // Log system event
            id: '1',
            type: 'document',
            name: 'my_document'
        ['1', '2', '3']
        function (err, attachments) {
    var now = new Date();
    // Get the list system events
        function(err, attachment) {


    This microservice was created and currently maintained by Sergey Seroukhov.


    npm i pip-services-attachments-node

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