Can we integrate Hibernate and SAP? I do have integrated a few databases with Hibernate. Since am not aware of SAP, I want to know if there is any support provided by Hibernate to integrate it with the SAP.
As far as I know I don't think that exists. SAP has its own data mapping strategy known as Open SQL and also provides special functions to insert, update and delete data that also ensure data consistency, those functions are called BAPI and unless you have an SAP connector to call these BAPIs then there's not much you can do. For more reference check this .Net connector example.
Sure you can make a connection directly (if the system administrator and/or DBA let you) to the database however is not advisable and is very dangerous because you could create inconsistencies in the system. Please do not try this approach.
However you can make use of software like the connectors I mentioned before or you could use the SAP interface system. You can find more information on this issue checking out the terms ALE and IDocs.
Another strategy is using an intermediate table on a database where you and SAP take and write data and with some controls communicate each other but on this issue you would use a BAPI in case of using a standard table or making a custom table (Z table) where you have more freedom to make your own changes.
Hope it helps
No, because SAP is not a database.
SAP is a software which is backed by a database. It does support several different RDBMS systems. Theoretically you could use Hibernate to access the database which backs your SAP system, but this is likely not a very good idea. Both hibernate and SAP are built on the assumption that they have exclusive access to the database. Having another application make changes to the DB without them knowing can lead to all kinds of obscure problems.
There are, however, several other methods to integrate SAP into your business processes, like calling BAPI function models using SAPs proprietary RFC protocol, communicating via IDocs, Batch-Input, SOAP webservices and many more.
If you think of the SAP system as a database as in RDBMS: No, you can't, because it isn't - as others have pointed out.
If you want to use something Hibernate-like stuff to access a backend system, you might want to take a look at Hibersap.
You can say SAP has built its own "Hibernate framework" in the Application Layer called OpenSQL( I guess this was built ages before Hibernate ). So SAP applications(ERP/CRM/SRM etc.) can communicate with any database type. So think of it like, SAP has a dialect for different databases.
But when you configure SAP application to use a Database, that database is locked down by SAP and you should not even try to hack it to directly update the database using direct SQL or any other framework like Hibernate. SAP does 100s of validations and checks before it saves the data into the database, you would be bypassing these checks if you are updating the database directly.
I think no organisation would allow you to do it in a production environment and if they allow you to, they don't need SAP.
SAP owns some database products like maxDB, sybase, HANA etc..Hibernate has the dialects for these products. Hibernate with HANA could be interesting.
Related
We have an existing system using Oracle DB and several applications working on/off it using JDBC/ODBC etc. For an additional interface for CRUD operations I am looking at a web based front-end. I dont see a whole of ideas in this areas, maybe because the ORacle DB is mostly enterprise and probably means the enterprises building their own custom apps?
Using the Oracle REST API services, build a front end using Angular/JS. This eliminates any need for oracle specific server side logic and almost ORacle independent. Are there any frameworks / opensource tools that fall in this area?
Please let me know any comments / feedback on this approach.
As far as I know there aren't really any options like this specifically for Oracle databases. You might be better off going with a desktop solution, of which there are many.
There is a web UI called "H2 Console" which claims to work with any JDBC connection. I have used this with MySql before with great success but have not tried it with Oracle.
The H2 Console application lets you access a database using a browser. This can be a H2 database, or another database that supports the JDBC API.
If you want something more 'user friendly' then as far as I know there are no existing solutions for this. You will probably have to build your own or educate your users on SQL.
Our company is in the process of creating an ASP.NET service to accept XML data sent from ERP systems such as Oracle. We have no experience (at all) with Oracle, so please excuse the simplicity of this question.
I see online that Oracle has a tool called JDeveloper that can hook up to WCF Services that use a DataContract/WSDL to send/receive data with relative ease.
Can anyone advise about the situation regarding WebAPI's, where no WSDL or DataContracts exist? Is it simple to craft a POST in Oracle to send to a WebAPI, or is the former option better/easier to work with?
Thanks in advance.
It's simple enough to call web service directly from Oracle:
There are a good support of XML/XSLT/XQuery to construct requests and parse responses (XML DB)
Oracle have an API to work with HTTP/HTTPS requests (UTL_HTTP package).
So if you decide to call web service from Oracle - it's possible and relatively simple for SOAP and REST web-services.
You can find example code in this answer on StackOverflow.
Update - answer on a comment
To make it clear, example above isn't work at a "database query level" because it's implemented on PL/SQL. Oracle Database engine natively incorporates support for two different languages:
traditional SQL, which is ANSI SQL standards implementation (traditionally with some incompatibilities and extensions);
PL/SQL, which is procedural programming language tightly integrated with a traditional SQL.
This two things are really different. Even there are a common questions about performance affected by switching context between SQL and PL/SQL engines and mostly caused by improper procedures design.
PL/SQL as a procedural language can access a rich set of APIs, provided by Oracle as a set of built-in packages. Among others there are a number of packages directly related to network communication protocols and standards: UTL_TCP, UTL_URL, UTL_SMTP, UTL_MAIL, UTL_INADDR, UTL_HTTP, HTP, HTF, DBMS_LDAP.
Needs to be said, that there are a set of APIs, provided to support publishing of PL/SQL code on the web. Set of OWA_xxxx packages supports access through mod_plsql. Another thing is a support for publishing SOAP web services in Oracle XML DB.
If you need to unload data from Oracle to web service on a schedule then look at DBMS_SCHEDULE and DBMS_JOB packages to start unload procedures periodically.
Most of this system packages implemented on Java and it's possible to write your own Java extensions callable from PL/SQL.
P.S. There are a UTL_DBWS package dedicated for implementation of calls to SOAP services from Oracle Database, but seems that it produces more problems than solves and I can't find reference to it in 11g documentation (10g only).
P.P.S. Some statements may be slightly inaccurate or contain exaggerations, but that should be enough to understand the overall picture.
I would like to use Meteor (Node.JS) to develop an application that will be used by 3,000+ concurrent users on a large size database.
I have looked at the nice examples and the idea to push changed data to the clients is very nice and very useful, but before I start the development I want to be sure how it works behind the scenes to be sure that when I have the application running with all these users it work fast with standard hardware.
I also require this to use Oracle as a database, but not sure that it is supported and if not, what are the requirements from an Oracle package to enable this facility.
I think that the server is having an active on going non-blocking query on the OPLOG table in mongodb and that is how we get the callback for all the changes in the database. Is that correct ? if so, is there a similar way to do it in Oracle ?
Thanks Roni.
I also require this to use Oracle as a database, but not sure that it is supported and if not, what are the requirements from an Oracle package to enable this facility.
Nope, meteor is currently mongo-only as they have implemented an in-browser library called minimongo. My guess is this project will never support oracle, but who knows. There is no mention of oracle support on the meteor project roadmap
Just happened to come across this question while searching at google.
However, if there are no native solutions. We can always figure out a way for a medium language to issue publishing.
Example Case:
Python will be used for synchronising data between Mongodb and Oracle (24/7 operation using cx_Oracle and MongoDB drivers from python)
Meteor Server will keep watch on what to publish
Meteor clients/browsers that subscribed to the channel that will be updated with oracle data.
I learned to love how LINQ enables set operations on collections. I'm not saying that I plan to shun traditional RDMBS, because I do need it for reporting. There are NoSQL alternatives out there, but they seem to all need to fire up a separate service.
What I looking for is something local where a DLL can create a database and perform CRUD on it. As mentioned, I'm not going to report out of this, just internal data store. The main application that will be using it is in C#.
I'm hoping that someone can give me a lead. If not, if there is anyone willing, we can start a open-source project for it. I'm not interested in commercial products.
Thanks,
You can run RavenDB in embedded mode inside your .NET application - no need for external services or anything.
And RavenDB supports Linq....
I need to develop a program that must delete and insert data into an Oracle database. Is it possible to use LINQ to SQL with Oracle?
For development I use MS SQL server but it will be a Oracle database in production. What do you recommend?
Officially No. Linq to SQL was originally build with the ability to swap out the data provider to allow connections to other databases, but they disabled this functionality in the released versions to encourage people to use more stable and supported data access layers (like EF). The recommended approach is to use Entity Framework if you want to switch between SQL and Oracle.
Also, Patrick is very right, make sure you are developing and testing against the same database platform you are going to use in production, there is a world of difference in how they operate. Sure, you should be able to abstract it away to not care about whether you are using SQL or Oracle, but that is almost never really the case.
No, you can't. Although LINQ to SQL was initialy designed with multi-database support in mind (you can see this when looking at the code using .NET Reflector) using a provider model, this model was never made public and Microsoft has no intensions in adding multi-database support to LINQ to SQL.
If you need multi-database support, please use Entity Framework.
No, LINQ-to-SQL doesn't support Oracle. Internally, the project had support for multiple back-ends, but this never made it into the final public release. I believe LINQ-to-Entities supports other databases.