DQSolution: A JavaScript repository from songyi10011001

Bark

Bark is a Data Quality solution for distributed data systems at any scale in both streaming or batch data context. It provides a framework process for defining data quality model, executing data quality measurement, automating data profiling and validation, as well as a unified data quality visualization across multiple data systems. You can access our home page here.

How to build

git clone the repository of https://github.com/eBay/DQSolution
run "mvn install"

How to run in docker

Download docker folder to your work path.
Enter docker directory and build images.
The first step is to build bark-base-env, which prepares the environment for bark.
```
cd <your work path>/docker/bark-base
docker build -t bark-base-env .
```
The second step is to build bark-env, which contains examples for bark demo.
```
cd <your work path>/docker/bark
docker build --no-cache -t bark-env .
```

Run docker image bark-env, then the backend is ready.

docker run -it -h sandbox --name bark -m 8G --memory-swap -1 \
-p 40022:22 -p 47077:7077 -p 46066:6066 -p 48088:8088 -p 48040:8040 \
-p 48042:8042 -p 48080:8080 -p 27017:27017 bark-env bash

Now you can visit UI through your browser.
```
http://<your local IP address>:48080/
```
If you are blocked at the login page, try account "test" with password "test".

How to deploy and run at local

Install jdk (1.7 or later versions)
Install Tomcat (7.0 or later versions)

Install MongoDB and import the collections

mongorestore /db:unitdb0 /dir:<dir of bark-doc>/db/unitdb0

Install Hadoop (2.7 or later versions), you can get some help here.
Make sure you have the permission to use command "hadoop".
Create an empty directory in hdfs as your hdfs path, and then create running and history directory in it
```
hadoop fs -mkdir <your hdfs path>
hadoop fs -mkdir <your hdfs path>/running
hadoop fs -mkdir <your hdfs path>/history
```
Install Spark (version 2.0.0), if you want to install Pseudo Distributed/Single Node Cluster, you can get some help here.
Make sure you have the permission to use command "spark-shell".
Install Hive (version 2.1.0), you can get some help here.
Make sure you have the permission to use command "hive".
Create a working directory, and it will be your local path now.

In your local path, put your data into Hive.
First, you need to create some directories in hdfs

hadoop fs -mkdir /tmp
hadoop fs -mkdir /user/hive/warehouse
hadoop fs -chmod g+w /tmp
hadoop fs -chmod g+w /user/hive/warehouse

Then, run the following command in your local path schematool -dbType derby -initSchema Now you can put your data into Hive by running "hive" here. You can get sample data here, then put into hive as following commands

```
CREATE TABLE movie_source (
  movieid STRING,
  title STRING,
  genres STRING)
ROW FORMAT DELIMITED
FIELDS TERMINATED BY '\;'
STORED AS TEXTFILE;

LOAD DATA LOCAL INPATH '<your data path>/MovieLensSample_Source.dat' OVERWRITE INTO TABLE movie_source;

CREATE TABLE movie_target (
  movieid STRING,
  title STRING,
  genres STRING)
ROW FORMAT DELIMITED
FIELDS TERMINATED BY '\;'
STORED AS TEXTFILE;

LOAD DATA LOCAL INPATH '<your data path>/MovieLensSample_Target.dat' OVERWRITE INTO TABLE movie_target;
```

If you use hive command mode to input data, remember to create _SUCCESS file in hdfs table path as following

```
hadoop fs -touchz /user/hive/warehouse/movie_source/_SUCCESS
hadoop fs -touchz /user/hive/warehouse/movie_target/_SUCCESS
```

You can create your own model, build your jar file, and put it in your local path.
(If you want to use our default models, please skip this step)
Currently we need to run the jobs automatically by script files, you need to set your own parameters in the script files and run it. You can edit the demo script files as following

env.sh
```
HDFS_WORKDIR=<your hdfs path>/running
```
bark_jobs.sh
```
spark-submit --class com.ebay.bark.Accu33 --master yarn --queue default --executor-memory 512m --num-executors 10 bark-models-0.0.1-SNAPSHOT.jar  $lv1dir/cmd.txt $lv1dir/
spark-submit --class com.ebay.bark.Vali3 --master yarn --queue default --executor-memory 512m --num-executors 10 bark-models-0.0.1-SNAPSHOT.jar  $lv1dir/cmd.txt $lv1dir/
```
These commands submit the jobs to spark, if you want to try your own model or modify some parameters, please edit it. If you want to use your own model, change "bark-models-0.0.1-SNAPSHOT.jar" to "your path/your model.jar", and change the class name.

Put these script files in your local path, run bark_regular_run.sh as following
```
nohup ./bark_regular_run.sh &
```
Open application.properties file, read the comments and specify the properties correctly. Or you can edit it as following
```
env=prod
job.local.folder=<your local path>/tmp
job.hdfs.folder=<your hdfs path>
job.hdfs.runningfoldername=running
job.hdfs.historyfoldername=history
```
If you set the properties as above, you need to make sure the directory "tmp" exists in your local path
Build the whole project and deploy bark-core/target/ROOT.war to tomcat
```
mvn install -DskipTests
```
Then you can review the RESTful APIs through http://localhost:8080/api/v1/application.wadl

How to develop

In dev environment, you can run backend REST service and frontend UI seperately. The majority of the backend code logics are in the bark-core project. So, to start backend, please import maven project Bark into eclipse, right click bark-core->Run As->Run On Server

To start frontend, please follow up the below steps.

Open bark-ui/js/services/services.js file

Specify BACKEND_SERVER to your real backend server address, below is an example

var BACKEND_SERVER = 'http://localhost:8080'; //dev env
//var BACKEND_SERVER = 'http://localhost:8080/ROOT'; //dev env

Open a command line, run the below commands in root directory of bark-ui
- npm install
- bower install
- npm start
Then the UI will be opened in browser automatically, please follow the User Guide, enjoy your journey!

Note: The front-end UI is still under development, you can only access some basic features currently.

Contributing

See CONTRIBUTING.md for details on how to contribute code, documentation, etc.

songyi10011001/DQSolution