1. what is datahub
2.why we use datahub
3. how its works
4. how to install datahub
5.how to work on datahub
as we all are known that if we want to give any
data to hybris we will go to IMPEX
INSERT impex is one of the way to feed data into HYBRIS system
i have one question
here we use IMPEX
to feed data into hybris then y we are goning to use DATAHUB :
answer is simple
for example we got a new project it is
already running in any one of
the technology we wont to develop that PROJECT from the Scrap
. so just think one how many lines of
IMPEX code is require to
feed all the data into our HYBRIS
some one said that just just
go for SAP PI and other toolsyes we can
use SAP PI : SAP PI
means SAP NetWeaver Process Integration (SAP PI) is SAP's enterprise application
integration (EAI) software, a component of the NetWeaver product group used to
facilitate the exchange of information among a company's internal software and
systems and those of external parties.
one to one ,one to
many it will be easy if many to
many many to one type came we have to take care of
some mapings and we wont to get
aware of SAP ABAP
if we use
DATAHUB it is just a simple
extension we no need to take care of
DATAHUB will run on tomcat server . code ing will be
done in SPRING so i Think it is reduce
our work so i will prefer that use DATAHUB .
1. what is data hub :
data hub is one of the extension in hybris .
it will run on tomcat server the main
aim of the datahub is transfer
huge amount of data from one DB to HYRIS
and HYBRIS to one DB for example just take
SAP HANA db as we all are know that
SAP HANA out put is in IDOC
form means in xml format . it will human redable and
very easy DATAHUB take this
format as in put and finaly after some Steps we can insert
data into the HYBRIS system . we use DATAHUB
in our project to do this
2.why we use datahub :
as i said above it is very easy to do our task . it is very easy to understand and it
will reduces the project
development time . and mainly it
is one of SAP product so it is belongs to sap family
The Data Hub also acts as a staging area where
external data can be analyzed for errors and corrected before being fed into
3. how its works :
take XML format as in put and finally we wont to convert it into IMPEX format
it can be done in two ways those
Outbound: hybris -> SAP ERP
Process Engine is used for decouplingData Hub adapter transfers data to Data HubData Hub extensions define the raw data formats, the
transformation to canonical data format and the target system format.SAP IDOC outbound adapter reads target system
definition, creates IDOCs and sends via Spring-Integration to SAP ERP.
Inbound: SAP ERP -> hybris
IDOCs are received by SAP IDOC inbound adapter, which creates
Spring-Integration messages. Messages are routed to mapping services provided
by SAP extensionsMapping services are creating raw data fragments and
route them to Data Hub raw inbound. Data Hub transforms raw items to canonical
items and then to target them, which are published to hybris.During Impex data processing, hybris services,
interceptors, translators and events are used. 4. how to install datahub :
Tomcat for use with the Data Hub. This involves setting up the JVM parameters.
The easiest way to do this is to create a Tomcat startup script that sets the
parameters for a UNIX system are"-Xms2048m
-Xmx4096m -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:+AlwaysPreTouch
-XX:+DisableExplicitGC". For two examples of Tomcat startup scripts:-
1.1 Installing a
Standalone Data Hub Server:-The Data Hub is not hard to install, but
installation is complex. If you make a small mistake, it just won't work. So,
go slow, take your time, read the instructions carefully, and follow them
1.2 Downloading and Installing the Data Hub Software:-The Data Hub is a module of the hybris Commerce Suite. To
get access to the Data Hub software, go to the Download page and download the full installation of the hybris
Commerce Suite. Extract the zip archives.The
Commerce Suite at the hybris wiki Download page is not intended for production
use. If you need a Data Hub download for production use, go to the Download
Center of SAP Service Marketplace.1.3 Installation of the Data Hub on a Tomcat
Server:-With your browser, connect to https://tomcat.apache.org/download-70.cgi and download the latest version of
Tomcat 7.X. Tomcat 7.X is the only version supported by the Data Hub.You should create a Tomcat Server
start-up file with the suggested performance configuration.For example:-datahubserver.sh or datahubserver.bat, which should be used to
start a Tomcat server for use with the Data Hub. To apply the VM options
of your choice to the Data Hub server environment, you need to set the
CATALINA_OPTS system variable, either in the user profile (UNIX) or System
Environment Variables (Windows).
Here are some examples of such a script: datahubserver.sh
1.5 Deploying Data Hub on Tomcat:-Data Hub can be deployed to Tomcat like any other WAR file. One option is to simply rename the Data Hub WAR file to datahub-webapp.war and copy it to the Tomcat webapps directory. The next time Tomcat starts, it explodes the WAR file automatically. Alternatively, you can use a context.xml file to customize the location and context path of the Data Hub WAR file. Using a custom context.xml is optional, but a context.xml file is the preferred method, because it keeps your Tomcat webapps directory unencumbered. You can find a full explanation how to use Tomcat's context.xml file at https://tomcat.apache.org/tomcat-7.0-doc/config/context.html.
If, for whatever reason, you want to delete the WAR file, you have to stop Tomcat first.
If you are deploying a new instance of datahub-webapp.war, you must manually delete the old exploded version contained in $CATALINA_BASE/webapps.
1.6 Configuring the Location of the local.properties File:-The local.properties file is used by the Data Hub to store configuration properties, and it must either exist in the classpath of Tomcat or be pointed to in the Tomcat context.xml file.
1.7 Deploying Data Hub Extensions on Tomcat
Data Hub extension JARs must be deployed so they are available to the web application class loader. One option is to copy extension JARs into the \WEB-INF\lib directory of the exploded Data Hub WAR file. Alternatively, you can use the context.xml file to add additional directories to be scanned for resources by the class loader. This allows you to keep your Data Hub extensions in a directory outside of the exploded Data Hub WAR.
In the example below, you create a datahub-webapp.xml and copy it to the $CATALINA_BASE/conf/<enginename>/<hostname> directory. Naming the file datahub-webapp.xml sets the context path to /datahub-webapp. You configure two directories in the virtualClasspath attribute:
· config-dir is the directory where the local.properties file is placed
· datahub-extensions is the directory where Data Hub extensions are placed
datahub-webappweb application. You need to install the following extension jar files, while being careful to select versions compatible with your Data Hub version:
· datahub-cleanup-126.96.36.199-RC2.jar (used to automatically cleanup the extraneous records in the Data Hub database - 5.7 only - refer toAutomated Elimination of Data Hub Auditing Related Database Records - 5.7)
Data Hub Solution Book
You are going to configure other options that affect Data Hub. Tomcat needs to be restarted for each of these, so it is best to wait until all installation/configuration steps are complete before starting Tomcat to launch Data Hub.
Copy the Data Hub webapp war file from %hybris-home%/hybris/bin/ext-integration/datahub to the Tomcat webapps directory and start Tomcat. Stop Tomcat.
Select the relational database you are going to use with Data Hub and configure Data Hub for it.
By default, when the datahub-webapp.war file is deployed, the application is configured to use the HSQL database. However, HSQL is not a supported database for production deployments.
By default, the Data Hub relies on a database instance with the name of 'integration' with an administrative user named 'hybris' with the password 'hybris'. The database needs to be created by the administrative user ('root') logging into the system. The 'hybris' user needs DBA rights and full schema privileges to the 'integration' database instance. You can use the following SQL statements to recreate this database between Data Hub runs to refresh the Data Hub database.
drop database integration;
create database integration;
By default, the kernel.autoInitMode is set to create-drop. If you are in a production environment, hybris recommends the kernel.autoInitMode property be set to update instead.
You need to configure your local.properties file for the appropriate database. To find the correct parameters for your database, see the associated database
You need to add the MySQL
database driver to the Tomcat server's classpath. For example,
be placed in %TOMCAT_HOME%\
After the Data Hub
application is deployed in the web server, there is a module.properties file in the apache-tomcat-<version>/webapps/datahub-webapp/WEB-INF/classes directory. The values
in the file can be superseded by a local.properties file, which you create to reflect
your local Data Hub setup. The content of the local
.properties file should reflect your database
choice as is shown
in the example for MySQL
Version 5.3 and 5.4
You need to restart the Tomcat server for the changes to take effect.
By default, MySQL performs case-insensitive queries, which may be an issue in some cases.
Case sensitivity is set using the collate parameter. To enable case-sensitive queries in the Data Hub,
the schema created needs to be configured as below. Also, MySQL does adopt the Operating System case
settings in some cases, such as Linux.
Collate Parameter used in a Schema Command
CREATE SCHEMA `integration`
DEFAULT CHARACTER SET utf8
COLLATE utf8_bin ;
You can use the following SQL statements to recreate this database between Data Hub runs to refresh the Data Hub database.
drop dat abase integration;
create d atabase integration;
By going through the following steps, you can configure the Data Hub to use encryption for secure attributes:
1. Generate an encryption key
2. Store the key in a file on the classpath or file system and set the datahub.encryption.key.path property
in the local.properties file
4. 5.1Generate an Encryption Key:-The Data Hub uses AES/ECB/PKCS5Padding symmetric key
128-bit key by default. There are many different ways you can generate an AES key.
If you have openSSL installed on your machine, you can generate a 128-bit AES key using the following terminal command:
openssl enc -aes-128-cbc -k secret -P -md sha1
You see the following sample result:
You are only interested in the value for key: 6F94977631C9CE1BADA1EA7B8AC609B4
Store the Key in a File and Set the datahub.encryption.key.path Property
Once you have generated a secret key, save it to a file on the classpath or file system.
You must specify the path to the file that contains the key by setting the datahub.encryption.key.path property in
A relative path is enough if the file is on the classpath. An absolute path is required if the file is on the file system
but not on the classpath. For example, if the file is on the classpath:
or, if the file is not on the classpath:
5.2Secured Attribute Value Masking:-Secured attribute values are masked when returned in
REST API responses and in logging. By default, secured attribute values are replaced with "*******".
Secured attribute value masking can be configured with the following properties:
# enable/disable secured attribute value masking
# set the masking value
STEP 6:-Data Hub Adapter Extension
The Data Hub Adapter is a
Core Platform extension that links the hybris platform to the Data Hub.
The Data Hub Adapter
extension is found in the %HYBRIS_HOME%
/bin/ext-integration directory. You should specify it as one of the extensions in the %HYBRIS/config/localextensions.xml file:
Then you need to update the $TOMCAT_HOME/lib/local.properties file. The local.properties file should contain the following statements.
More detailed information regarding this step can be found in the Data Hub Adapter Extension.
Using a REST browser tool such as Postman, issue the following command:
GET - http://localhost:8080/datahub-webapp/v1/data-feeds/DEFAULT_FEED/
You should get a 200 Success message in response, which shows the Data Hub is running properly.