As always at the start of another new month, let’s have a look at what happened at Hop over the last month. Here’s the recap for February 2021!

Metadata Injection

Metadata injection was added to Hop months ago. As with most of the functionality that was ported from PDI/Kettle, some work was required to lift the code to the new flexibility and quality standards we’ve set for Hop. After we’ve given it some love, Hop Metadata Injection now has:

  • UI improvements:

    • Fixed filter button

    • Added source-to-target (input-to-template) mapping button

    • Removed unneeded top level in the tree

    • Added a "None" button when user clicks on a target key (was missing)

  • reimplemented support for additional transforms, among others CSV File Input, Group By.

Metadata Injection

Dark Mode

"If there’s no dark mode, it doesn’t exist."

It took some tweaks to get the Hop dark mode to work correctly on all major platforms (looking at you, Mac OS!!). Since it appeared in mid-February, all Hop developers seem to have switched to dark mode overnight.

Dark Mode

Beam Spark runner improvements

The ability to run Hop pipelines on Apache Spark over Apache Beam has been available since the very early Hop days.

It is now a lot easier to run pipelines on Apache Spark and Apache Flink.

Beam Spark

Check out the updated docs to take this for a spin.

New Metadata Types

A number of new metadata types were introduced. These are all brand new, with lots of potential use cases!

  • Webservice: expose data from a pipeline as a webservice

  • Pipeline Log and Workflow Log: send pipeline and workflow logging data to a probe to be picked up in a transform. The pipeline holding that transform can do whatever is possible in Hop: write to files, send to a (graph) database, Kafka producer, …​

  • Pipeline Probe: similar to the logging probe, but for actual data. The processing pipeline in this case can be used for data quality, lineage and any imaginable use case.

Probes

Web Service

New Plugins

The list of new plugins in Hop continues to grow. Here are the new additions for February:

Various

Docker improvements

A number of small issues have been fixed and improvements have been made. As the number of Docker use cases continues to grow, Hop in Docker has become stable and mature.

Export project to zip

Export project to zip

Hop Web

The merge of Hop Web is getting closer. We’ve closed a number of remaining issues, a war file is now included as part of the default Hop build. Expect a fully integrated Hop Web in the default Hop build soon!

Migration updates

A number of bug fixes, tweaks and improvements have been made to support migration for additional PDI/Kettle steps and job entries to Hop. It is now easy and safe to migrate your PDI/Kettle projects to Hop!

Ordered List

In some cases (e.g. the new Coalesce plugin), the order of fields is important. For these use cases, we now have an Ordered List:

Ordered List

Community

The Hop community continues to grow:

  • chat: 142 registered members (up from 134) join

  • LinkedIn: 387 followers (up from 375) follow

  • Twitter: 291 followers (up from 250) follow

  • YouTube: 76 subscribers (up from 68) subscribe

Check out the complete list of committers and contributors.

Without community contribution, Hop is just a coding club! Please feel free to join, participate in the discussion, test, file bug tickets on the software or documentation, …​ Contributing is a lot more than writing code.

Check out our contribution guides to find out more.

JIRA Tickets

The full list of issues that had activity over the last month is:

Resolved| (72)

Issue Summary Components Created Updated

HOP-2016

Variable from environment config only work after restart

GUI

2020-10-04

2021-02-28

HOP-2076

port sample rows step to transform

Transforms

2020-10-04

2021-02-28

HOP-2104

"Hop needs a default ""Project"" and ""Local Run Configuration"""

2020-10-04

2021-02-05

HOP-2166

Improve first-time usage experience

GUI

2020-11-12

2021-02-05

HOP-2407

change selected text color

Website

2021-01-07

2021-02-03

HOP-2455

attach POM to the correct phase

2021-01-25

2021-02-28

HOP-2474

Add UDJE (User Defined Java Expression) to ETL Metadata Injection step

2021-01-28

2021-02-05

HOP-2478

Options Dialog : ConfigPlugins are no longer showing up

GUI

2021-01-30

2021-02-03

HOP-2479

Remove IPluginFolder

2021-01-30

2021-02-01

HOP-2480

fix typos in website

Website

2021-01-31

2021-02-02

HOP-2484

README for docker image has wrong run instructions

2021-02-01

2021-02-02

HOP-2485

Docker container references wrong deployment folder

2021-02-01

2021-02-03

HOP-2488

Port MonetDB Bulk Loader to Hop

2021-02-02

2021-02-27

HOP-2489

Bump Apache commons-collections version 3.2.2 to commons-collections4 version 4.4

2021-02-02

2021-02-03

HOP-2491

NPE when loading old project configurations

GUI

2021-02-03

2021-02-04

HOP-2493

Code and logging references steps i.s.o. transforms

API

2021-02-03

2021-02-04

HOP-2494

Saving a pipeline or workflow before running doesn’t work

GUI

2021-02-03

2021-02-04

HOP-2498

CSV File Input: add metadata injection support

Transforms

2021-02-05

2021-02-06

HOP-2500

Show last rows widget is showing incorrect data

GUI, Transforms

2021-02-05

2021-02-28

HOP-2501

ETL Metadata Injection: variable and parameter passing issues

Transforms

2021-02-05

2021-02-06

HOP-2502

Add toolbar icons to edit pipeline and workflow properties

GUI

2021-02-05

2021-02-16

HOP-2503

Preview does not work on transforms using variables

2021-02-05

2021-02-28

HOP-2504

Metadata Injection: Logging levels are not propagating

Transforms

2021-02-06

2021-02-08

HOP-2505

Group By : add support for metadata injection

Transforms

2021-02-06

2021-02-08

HOP-2508

Port the transform Coalesce plugin

Transforms

2021-02-07

2021-02-09

HOP-2509

Add EnterOrderedListDialog to select in an order the elements of a list

GUI

2021-02-07

2021-02-08

HOP-2514

merge join input steps are not correctly converted to transforms

Import

2021-02-10

2021-02-23

HOP-2515

BlockingTransform type not correctly converted

Import

2021-02-10

2021-02-23

HOP-2516

remove references to Project Hop

Documentation

2021-02-10

2021-02-23

HOP-2517

"Environment dialog: Add a ""Create…​"" button to create a new config file"

GUI

2021-02-11

2021-02-13

HOP-2518

Add keyboard shortcut Ctrl+Shift+S to save as menu

2021-02-11

2021-02-11

HOP-2520

full connection element not removed from workflow XML

Import

2021-02-12

2021-02-23

HOP-2525

EnterMappingDialog : improve guessing and sort mapped values

GUI

2021-02-13

2021-02-15

HOP-2526

Meta data injection dialog: various bugs

GUI

2021-02-13

2021-02-15

HOP-2531

Integration tests: optionally generate surefire reports

Infrastructure

2021-02-15

2021-02-15

HOP-2532

Hop Run: variables in environment or project are not applied to top-level parameters

Hop Run

2021-02-15

2021-02-16

HOP-2533

Workflow Executor: NPE in dialog

GUI, Transforms, Workflows

2021-02-15

2021-02-16

HOP-2535

Port the SAS Input step to Hop

Transforms

2021-02-17

2021-02-19

HOP-2536

Long lived docker container throws NPE

docker, Hop Server

2021-02-17

2021-02-18

HOP-2537

Remove inkscape metadata from SVG files

GUI

2021-02-18

2021-02-19

HOP-2538

"Add ""View output"" as a context action option"

Transforms

2021-02-19

2021-02-22

HOP-2539

JSON Input dialog: get fields shows white text on white background

Transforms

2021-02-19

2021-02-20

HOP-2543

"Kettle Import: change pipeline run configuration to ""local"""

Import

2021-02-22

2021-02-23

HOP-2544

Kettle Import: change JobExecutor to WorkflowExecutor

Import

2021-02-22

2021-02-23

HOP-2545

${Internal.Entry.Current.Folder} not working

API, Import

2021-02-22

2021-02-23

HOP-2546

Workflow Executor: assume 1 row grouping if all grouping fields are blank

Transforms

2021-02-22

2021-02-23

HOP-2548

Metadata Perspective: sort by metadata type name

GUI

2021-02-23

2021-02-24

HOP-2549

Group By transform loses aggregation type

Transforms

2021-02-23

2021-02-25

HOP-2550

Docker: simplify hop-server use case

docker, Hop Server

2021-02-23

2021-02-24

HOP-2552

ExcelInput accept_stepname not replaced to accept_transform_name

Transforms

2021-02-24

2021-02-25

HOP-2554

Allow logging to take place with a Hop pipeline

API

2021-02-24

2021-02-24

HOP-2556

Spark runner: missing dependency

API, Beam

2021-02-24

2021-02-24

HOP-2557

Spark runner : not finishing application

API, Beam

2021-02-24

2021-02-25

HOP-2558

Remote pipeline engine: improve logging

Hop Server

2021-02-24

2021-02-25

HOP-2559

Hop Server: broken icons in web interface

Hop Server

2021-02-24

2021-02-25

HOP-2560

Docker container: Missing fonts for running hop-server

docker, Hop Server

2021-02-24

2021-02-25

HOP-2561

Docker container: Make port configurable

docker, Hop Server

2021-02-24

2021-02-25

HOP-2562

Remove Mouse wheel support

Hop Web

2021-02-24

2021-02-24

HOP-2563

TableView widget color on Windows are bad

GUI

2021-02-24

2021-02-24

HOP-2565

Beam: add a main class for executing using Spark Submit or Flink Run

Beam

2021-02-25

2021-02-25

HOP-2566

Docker: libraries like snappy need libc-compat in the container

docker

2021-02-25

2021-02-25

HOP-2567

Allow output rows from any transform to be streamed to another pipeline

Transforms

2021-02-25

2021-02-28

HOP-2569

Bring back space while mousing over transform

GUI, Transforms

2021-02-26

2021-02-26

HOP-2570

Allow a metadata editor to be set to changed or not from outside the editor

API, GUI

2021-02-26

2021-02-26

HOP-2571

Expose getter/setter for metadata in IMetadataEditor

API, GUI

2021-02-26

2021-02-26

HOP-2572

TableView: when a row is inserted the view is not flagged as modified

API, GUI

2021-02-26

2021-02-26

HOP-2574

Keyboard shortcuts are not handled correctly

API, GUI

2021-02-26

2021-02-27

HOP-2576

JSON Input step not recognizing .json file extension

Transforms

2021-02-26

2021-02-27

HOP-2577

Create a Web Service metadata type

Hop Server, Metadata

2021-02-27

2021-02-27

HOP-2580

Deliver a working Hop Server XML configuration file

Hop Server

2021-03-01

2021-03-01

HOP-2581

Workflow Logging transform outputs same field name twice

Transforms

2021-03-01

2021-03-01

In Progress (7)

Issue Summary Components Created Updated

HOP-2469

Ensure that Hop complies with ASF encryption policy

2021-01-27

2021-02-23

HOP-2481

disable google analytics tracking when running website locally (draft mode)

Website

2021-01-31

2021-01-31

HOP-2529

Add Hop Web Docker image to build process

Containers, Hop Web

2021-02-14

2021-03-01

HOP-2555

Add support for a JSON value type

API

2021-02-24

2021-02-24

HOP-2575

Create a file explorer perspective

GUI

2021-02-26

2021-03-01

Open (29)

Issue Summary Components Created Updated

HOP-2434

When reloading project variables they are not refreshed

Metadata

2021-01-17

2021-02-09

HOP-2468

NPE in file open dialog

GUI

2021-01-27

2021-02-03

HOP-2482

There will be a NullPointerException if you only regist a pipeline

Hop Server

2021-01-31

2021-01-31

HOP-2483

Translator does not work under Windows

2021-01-31

2021-02-15

HOP-2486

"Picking ""Create hop"" eventually brings up action picker again"

GUI

2021-02-02

2021-02-02

HOP-2487

Unit tests UI issues

2021-02-02

2021-02-03

HOP-2490

Issue editing Data Set

GUI

2021-02-03

2021-02-09

HOP-2492

Error creating Git metadata

GUI

2021-02-03

2021-02-09

HOP-2496

Translator sort i18n messages on the key

2021-02-03

2021-02-12

HOP-2499

Trim option in database lookup

Transforms

2021-02-05

2021-02-05

HOP-2506

Transform Fake data call private method domainName()

Transforms

2021-02-07

2021-02-07

HOP-2510

Add integration tests for MQTT transforms

2021-02-08

2021-02-08

HOP-2511

Merge join description is incorrect

Documentation

2021-02-08

2021-02-08

HOP-2519

add string operations to Metadata Injection

Transforms

2021-02-12

2021-02-26

HOP-2521

document salesforce transforms

Documentation

2021-02-12

2021-02-12

HOP-2522

Javascript Step does not output booleans

Transforms

2021-02-12

2021-02-12

HOP-2523

document file access over VFS

Documentation

2021-02-12

2021-02-12

HOP-2524

port Dropbox steps to Hop transforms

Transforms

2021-02-12

2021-02-12

HOP-2530

Add Hop Web tests to nightly test process

Hop Web, Integration Testing

2021-02-14

2021-02-14

HOP-2534

Add Injection Support to AddSequence Transform

2021-02-15

2021-02-15

HOP-2540

double click or modifier-click on an action or transform name without opening the dialog

GUI

2021-02-19

2021-02-19

HOP-2541

add or extend tooltip to action and transform icons and text to

GUI

2021-02-19

2021-02-19

HOP-2547

Update the Beam plugin to version 2.28.0

API, Beam

2021-02-23

2021-02-23

HOP-2551

Error while executing Pipeline using Beam Spark pipeline engine

Beam, Hop Run, Pipelines

2021-02-24

2021-02-25

HOP-2553

Error while executing Pipeline using Beam Spark pipeline engine - USING HOP GUI

Beam, Pipelines

2021-02-24

2021-02-25

HOP-2564

Config folder is not picked up correctly

Hop Web

2021-02-24

2021-03-01

HOP-2568

Text File Output

Transforms

2021-02-25

2021-02-25

HOP-2573

Create a Hop sizing guide

2021-02-26

2021-02-26

HOP-2578

Special chars in menu items not displayed correctly on macos

GUI

2021-02-28

2021-02-28

Closed (11)

Issue Summary Components Created Updated

HOP-1882

Adding run config without name causes exception

GUI

2020-10-04

2021-02-28

HOP-2091

port formula step to transform plugin

Transforms

2020-10-04

2021-02-02

HOP-2477

Move interface IValueMetaConverter to package org.apache.hop.core.row[.value]

2021-01-30

2021-02-08

HOP-2495

Translator wrong path for new language file

2021-02-03

2021-02-03

HOP-2497

Add custom entry point extension option

Containers

2021-02-05

2021-02-05

HOP-2507

ShowHelpDialog bad layout

2021-02-07

2021-02-09

HOP-2512

Duplicated text in Calculator plugin description

Documentation

2021-02-08

2021-02-09

HOP-2513

'Split fields' instead of 'Split fields to rows'

Documentation

2021-02-08

2021-02-09

HOP-2528

HOP_CONFIG_FOLDER is ignored when resolving projectHome

Projects

2021-02-14

2021-02-14

HOP-2542

Display.isSystemDarkTheme is not available in RAP

Hop Web

2021-02-20

2021-02-28

HOP-2579

Fix ValueMeta image pixelized

GUI

2021-02-28

2021-03-01