I have a standalone Java application capable of replaying a time series of data records. Communication with the server is performed using a bespoke binary wire protocol over TCP/IP.
We have a requirement to be able to easily import data records from this application into MS Excel / Access and I am interested in the recommended way to do this.
One idea we're exploring is to write a web "wrapper" service (also in Java) that will communicate with the underlying server and then translate the binary data into a more friendly text format for consumption by Excel / Access. However, the drawback here is that we lose any type information associated with each field in a given record.
I've briefly looked into writing custom ODBC / OleDB drivers but this seems complex and is probably overkill for what we're trying to achieve.
Can anyone recommend any other approaches?
How about xlloop? http://xlloop.sourceforge.net/
Uses an Excel plugin to connect to a function server, where you can create your own functions.
You may connect with an Access Database via the JDBC/ODBC Bridge driver.
From your previous comments I assume that you need to serve dynamic/changing data. If that is the case then take maybe the IRtdServer interface and this article referring to Excel. Its a COM Interface so you probably will need something like Com4j
Related
I have an embedded system using a python interface. Currently the system is using a (system-local) XML-file to persist data in case the system gets turned off. But normally the system is running the entire time. When the system starts, the XML-file is read in and information is stored in python-objects. The information then is used for processing. My aim is to edit this information remotely (over TCP/IP) even during process. I would like to use JAVA to get this done, and i have been thinking about something to share the objects. The problem is, that I'm missing some keywords to find the right technologies to get this done. What i found is SOAP, but i think it is not the right thing for this case, is that true? I'm grateful for any tips.
As I understand, you are using XML file to store start up configuration
And my assumptions on your interface between Java & Python apps
You want your Java application to retrieve objects over Python interface
And process them locally and send it back to Python interface to reload config ?
So, depending on your circumstances, you can workout something with the following
Jython
Pickle (if you have no restriction on startup config file format or can afford to do conversion)
https://pypi.python.org/pypi/Pyro4
Also you can get some ideas from here:
Sharing a complex object between Python processes?
You should ask your python application to open a XML-RPC socket which clients can connect on. This could let an outside application to execute an endpoint, which would manipulate your python object values in someway. There are several good choices for Java XML-RPC libraries, including the amazing org.apache.xmlrpc library.
I have an Excel with some macros. The data is currently sourced manually. In order to automate the report, I need to source the data directly from Oracle database. Unfortunately, this cannot be done, as it is a production database and passwords cannot be shared with anyone.
The next best possible approach is to connect via the Java layer. How can I connect VBA with a Java service?
Any conceptual starting points will also be appreciated.
There is a very nice API from Apache called POI for processing Microsoft documents. http://poi.apache.org/
The other approach is to use OLEDB driver for Excel which will allow you to read data from Excel exactly as you will do from any database using JDBC.
Interop between different technologies likes this is commonly achieved with a combination http and xml.
It's a long time since I saw this done so the technologies might be out of date but you can create a ADO record set from XML.
Excel can make a http call to a Java server that returns the xml. This xml can then be used to create a record set for Excel to consume just as if that record set were obtained directly from the database.
I have this client with this system coded in Clarion. He is needing an webservice in Java to public some APIs from their system.
Does anyone know the best approach to access and modify any given clarion table ( .dat file) ?
You can use Capesoft's Nettalk or Clarion Handy Tools to create a SOAP server that accesses .dat, .tps or any other data Clarion is capable of accessing. The examples provided make it quite simple and these servers perform well.
(i even don't know if i need a cms)
what i need is: a simple web based way for a functional department to create/edit multilingual text documents (probably tagged with customizable semantic tags).
The containing Texts are used in an RIA showing statistical data and infos about it. This infos and other user visible Stings should be fully managed by functional department.
the destination of the this texts/documents is an embedded apache derby db - delivered together with RIA release (as zip-File,- the texts are static).
So on the other hand the cms (if this is an cms) should provide an interface to export the data - either a simple db-structure to get data via jdbc or a java api.
so what cmc/?? do you suggest for this usecase
thx in advance
Maybe you could use a java web framework like Tapestry to create a simple web application.
It has some premade components too easily modify and save data to a database.
I am currently working on a project that was not made by me but it makes use of a lot XML files instead of MySQL in place of it.
Because of that it makes me wonder if there is really any benefits of using XML over MySQL here.
The scene is, the XML files are loaded only ONCE and used on the server for N things it does.
The XML is only reload if the admin issue a command to the server to reload it.
All the XML files together have an average of maximum 100 mb size.
If you could as well give me a little brief of the above in regards the usage of XML over MySQL would appreciate.
What should I consider to know when a XML would be a better option over a simple innodb or myisam table ?
If your data is read-only and brought into memory only at the command of the admin, then I don't think it's much of an advantage for either technology.
MySQL would have the advantage of SQL queries if you have to search the data. Even in that case it's the type of data that matters. If you have long reference chains/object graphs, then a relational database may be slow because of all the JOINs.
But XML has its own issues. You can easily parse it into a DOM object, but then you only have XPath to search it.
XML is used as one of the ways of storing data. one of using xml is, it makes the data easy to be readable. you can use mysql if there are lot of users need the access to the data at the same time and mysql also supports transactional processing of data whereas xml does not have such features.
just adding the option in between - you could also use some form of xml database like
eXist (http://exist-db.org/index.html) or sedna (http://modis.ispras.ru/sedna/)
XML stored at local storage, and readable only by local server (don't argue me you can use memcache, replicated via rsync or so)
No doubt you can open the XML via a http server, but it will be slow.
While, mysql support port communication, and replication, it basically don't have boundaries if you expanding to multiple servers.
And even at 5.1, mysql support XML