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  • Motivation:
    • current way of managing job config via files makes it hard to manage job configurations, persisting it in MySQL would make it easier to manage and also provide various CRUD API interfaces to mange the job configuration.
  • Proposed Change: 
    • create MySQL table `gobblin_job_config`
    • create REST endpoints for CRUD operations
    • add functionality to detect change in any job config and schedule or trigger job accordingly ( similar to current mechanism based on file change )
    • In future, Gobblin should use JDBI (v3) as ORM instead of plan JDBC based persistence which will become cumbersome as it uses DB heavily for all kinds of metadata storage.
  • New or Changed Public Interfaces:
    • POST /job/{jobName}
    • PUT /job//{jobName}
    • GET /job/{jobName}
    • DELETE /job/{jobName}
  • Migration Plan and Compatibility: 
    • since this is new functionality, in addition to the current file based job config, user can select either one to manage the job.
  • Rejected Alternatives:
    • use of other REST framework ( preferring to use REST.li instead of dropwizard or any other as its built in framework for other APIs

Design:


MySQL tables:

gobblin_job_config
CREATE TABLE gobblin_job_owners
(
    name         varchar(255) NOT NULL,
    email        varchar(255) NOT NULL,
    team_name    int(11)               DEFAULT NULL,
    team_email   int(11)               DEFAULT NULL,
    org_name     int(11)               DEFAULT NULL,
    created_date timestamp    NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_date timestamp    NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    PRIMARY KEY (email)
) ENGINE = InnoDB
  DEFAULT CHARSET = utf8;

CREATE TABLE gobblin_sync_systems
(
    name         varchar(255) NOT NULL,
    db_type      varchar(255) NOT NULL,
    users        varchar(255) NOT NULL,
    on_hold      tinyint(1)   NOT NULL DEFAULT '0',
    deprecated   tinyint(1)   NOT NULL DEFAULT '0',
    config       text,
    created_date timestamp    NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_date timestamp    NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    PRIMARY KEY (name)
) ENGINE = InnoDB
  DEFAULT CHARSET = utf8;

CREATE TABLE gobblin_jobs
(
    id            int(11)      NOT NULL AUTO_INCREMENT,
    name          varchar(255) NOT NULL,
    description   varchar(255)          DEFAULT NULL,
    schedule      varchar(64)           DEFAULT NULL,
    is_disabled   tinyint(1)            DEFAULT '0',
    priority      smallint              DEFAULT 100,
    configs       text,
    owner_email   varchar(255) NOT NULL,
    source_system varchar(255) NOT NULL,
    #source_dataset varchar(255)          DEFAULT NULL,
    #target_dataset varchar(255)          DEFAULT NULL,
    target_system varchar(255) NOT NULL,
    created_date  timestamp    NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_date  timestamp    NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    PRIMARY KEY (name),
#     FOREIGN KEY (owner_email) REFERENCES gobblin_job_owners (email),
#     FOREIGN KEY (source_system) REFERENCES gobblin_sync_systems (name),
#     FOREIGN KEY (target_system) REFERENCES gobblin_sync_systems (name),
    INDEX (name),
    INDEX (id)
) AUTO_INCREMENT = 1
  ENGINE = InnoDB
  DEFAULT CHARSET = utf8;


CREATE TABLE gobblin_sync_systems_maintenance
(
    id               int(11)      NOT NULL AUTO_INCREMENT,
    sync_system_name varchar(255) NOT NULL,
    type             varchar(255) NOT NULL,
    start_time       datetime     NOT NULL,
    end_time         datetime     NOT NULL,
    PRIMARY KEY (id),
    FOREIGN KEY (sync_system_name) REFERENCES gobblin_sync_systems (name)
) ENGINE = InnoDB
  DEFAULT CHARSET = utf8;


  1. Create New job example
POST body
POST http://localhost:9090/job/PullFromWikipedia

{
	"jobName": "PullFromWikipedia",
	"jobDescription": "A getting started example for Gobblin",
	"jobDisabled": false,
	"jobProperties": {
		"job.group": "Wikipedia",
		"source.class": "org.apache.gobblin.example.wikipedia.WikipediaSource",
		"test_remove": "test_remove_value",
		"something": "asdsad"
	}
}


2. update existing job

POST body
POST http://localhost:9090/job/PullFromWikipedia

{
	"jobName": "PullFromWikipedia",
	"jobDescription": "A getting started example for Gobblin",
	"jobDisabled": false,
	"jobProperties": {
		"job.group": "Wikipedia",
		"source.class": "org.apache.gobblin.example.wikipedia.WikipediaSource",
		"test_remove": "test_remove_value",
		"something": "asdsad"
	},
	"_jobPropertiesToRemove": [ 
		"key" 
	]
}



3. GET existing job

GET Result
GET http://localhost:9090/job/PullFromWikipedia
{
    "jobName": "PullFromWikipedia",
    "jobId": 14,
    "jobProperties": {
        "source.class": "org.apache.gobblin.example.wikipedia.WikipediaSource",
        "test_remove": "test_remove_value",
        "job.group": "Wikipedia",
        "something": "asdsad"
    },
    "jobDisabled": false,
    "jobDescription": "A getting started example for Gobblin - pull some pages from wikipedia",
    "created_date": 1575937161000,
    "updated_date": 1575937161000
}




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