What is marshalling/unmarshalling?

And how is it different form Serialization/Deserialization?

And the additional comment I would add to that explanation would be that while serialization/deserialization is usually performed on whole objects, marshalling/unmarshalling is a finer grained mechanism for the serialization/deserialization of just a parameter list and a return value ...with the actual method implementations left unexposed and secure.

Similar Messages

Validate XML against XML Shema while marshalling/Unmarshalling in JAXB?.

Hi,
Can i validate XML documents against XML Shema when i marshall/unmarshall the same using JAXB API?.
Thanks

Well, it is weird, but, the code below works when validating the NonEmptyString type:
XmlSchemaSet schemaSet = new XmlSchemaSet();
schemaSet.Add(null, "LogConfig.xsd");
XDocument doc1 = XDocument.Load("LogConfig.xml");
doc1.Validate(schemaSet, new ValidationEventHandler(ValidationCallBack), false);
However, if I leave the <LogName> empty it does not valid the values set on xsd fixed attribute,
The solution?
Well, I'm validating the same xml twice, the code above and the code on my first question.

Character encoding conversion for marshall/unmarshall?

Hello, Java Web Services gurus,
I am wondering if there is an easy/plugin-able way to do character encoding conversion transparently in the process of marshall/unmarshall.
Basically, my input/output will always be these UTF-8 XMLs. As the backend database is ISO encoded, I hope the result of unmarshall will give me ISO strings. And when it comes to marshall, the ISO strings can be transparently turned to UTF-8 XML response. Right now I'm using JAXB's annotations to parse XML into objects.
I understand there will be chars in the input file not able to get converted, if so, I'd be be expecting an error/exception that flags the failure
Hope I sound clear. This has been a headache for a while. Really hope someone may help out a bit. Thanks a million in advance

[Duplicate Post|http://forums.sun.com/thread.jspa?messageID=10971554&tstart=0#10971554]

XML marshalling / unmarshalling javabeans and xsd rational

Hoping someone can give ma starting point as I am having trouble
finding any clear documentation. In Rational Application Developer you have the option to generate javabeans from an XML Schema document. My questions are:
1) once you have generated your beans how can you use these files to
marhall and unmarshall XML documents?
2 )how does all of this compare to the JAXB api packaged in the
webservices development pack?
I am new to all of this and just looking for some good documentation,
tutorials, and a starting point.
Thanks!!!

BTW, sorry for posting so late, but I am heading out for the day. See you all in 16 hours. :^)
- Saish

XML Marshalling/Unmarshalling

All,
I am familiar with XMLBeans and JAXB. However, I would prefer not to use either of these for two reasons:
I am not a schema guru (not do I want to be)
I hate code generation in the build processI'm looking for something that would map an X-Path to a Java object. However, I do not want the tool to actually generate that Java object. Rather, a developer will.
Any technology out there that anyone has used that fits those requirements?
Thanks,
- Saish

BTW, sorry for posting so late, but I am heading out for the day. See you all in 16 hours. :^)
- Saish

Paramer marshalling/unmarshalling in jax-ws

HI,
Can we transit an complex-type parameter to some other types of java objects (like a Document object or something else) rather than java beans when we are using jax-ws?

Yes, if you use Dispatch you can use a Source object. The JavaBean model
is not required. Again the most flexible would be to use Dispatch.

JAXB marshal and unmarshal

hello,
i have written some code to retrieve data from an XML file and mapped the data and display the mapped data in a new XML file, but i am able to display the mapped data in an MSdos window by running ANT, after this i am unable to write the displayed data in to XML file.
Input XML file holds --- Firstname(Hello) and
Lastname(World)
my MSdos display data ----------- Hello World
is in this way
I want the above out put in to XML file
if any body know this help me.
Thank you.

IMHO these classes are not meant to be serialised, the XML produced is the medium that is tranmitted between programs. The XMLB classes are available at both ends to do the marshalling/unmarshalling.I dissagree, xml is just an interface to the outside world, so to speak. I'm working with a project that uses jini and rmi, I really don't need the extra hasle of writting custom serialization classes.

XML parsing in CEP

Hi All,
I somehow strongly feel OCEP should have much more XML support.
Firstly we need not to use XML marshalling/unmarshalling to and from Java classes.
Secondly event definition could have supported through XSD(s).
Lastly CQL should have a solid XML parsing capability (although it has some XQuery based naive support). If we had the support, it would have been much more easier send data directly from some bus (e.g. OSB) to OCEP and apply the pattern using CQL.
Life would be much more simpler.... Isn't it?
Regards
Arijit
Edited by: calvinIsMe on Oct 15, 2012 11:45 PM

Hi Alex
Nice to get feedback directly from creator.
Always felt EDN integration is an obvious future step. I feel it kind of completes gaps in Oracle EDA offering. ESB (in this case SOA suite) can be biggest source of events in an enterprise.
Having said that can we get some more details on what next release of OCEP is bringing along? Anything on CEP dashboard. Whenever we are trying to build a solution around CEP, we had to rely on BAM. No offense on BAM, that is indeed a powerful tool. But to represent a pattern of data graphically, it seems overkill. Or am I missing something?
Regards
Arijit
Edited by: calvinIsMe on Oct 17, 2012 12:09 AM

Accessing BPEL processes via a proxy web service performance issues

Hello,
I have more BPEL processes implemented, each such a process implementing business functionality in a certain domain (generally, a domain has more business processes).
The request was to provide a single web service for each domain. It means that all the business methods (processes) in the same domain should be accessed through the same web service. This request doesn't make possible to expose the BPEL processes themselves as web services that could be directly consumed by different clients of the application.
The alternative will be to implement the "domain" web services through a Java class, for instance. With this approach, the Java based domain web services will expose the needed business methods to the clients. And the Java class will get the request input parameters and will call the corresponding BPEL process via SOAP. This scenario would be fine, but... this approach would imply a supplementary marshalling/unmarshalling process at the domain web service level. The data returned by the BPEL processes could be very large and in such a situation the Java based domain web service will introduce an important performance drawback.
Is there any other solution to this case that will allow the using of a "proxy" domain web services that will not introduce any important drawback via marshalling/unmarshalling?
Many thanks in advance!
Regards,
Marinel

Hello,
First, thank you Sandor for your answer.
I understand that it is possible to create a BPEL process that exposes multiple operations/messages. This would be exactly what I need: a single process (web service) that will expose many operations. Could anyone, please, point me to such an example?
So far I thought that there is possible to have only one operation exposed with a BPEL process, what is delimited between the receive/reply blocks (in the synchronous case).
Regards,
Marinel

SOAP performance issue

Hi,
My problem is that the NE I am connecting to was exposing its interfaces as LDAP and now they are changing those interfaces as SOAP. We are getting a very high load and I feel that since LDAP is optimized for fast read-speeds, replacing the LDAP interfaces with Web Services would have performance implications since SOAP performs poorly compared to the LDAP because of transport inefficiencies & marshalling/unmarshalling overhead.
Although the NE team says that they will be able to give response withing the defined SLA time (around 1 sec) but the what they are not understanding is that even if they given response withing 1 sec, Web services invocation operations would also be expensive. Also overhead on our end (client) would also include extracting the SOAP envelope and parsing the XML by engine. Further, XML data cannot be optimized much for all cases.
Pls guide me if I am correct or wrong in my opinion.
Thanks
AA

If I get it right, LDAP ist just a protocol for calling a directory service. The backend, is performing with the same throughput independent of the type of protocol.
Our performance tests on our soa-servers showed, the total overhead, including network, logging, Application server stuff, xml parsing, is about 10%. We got this value testing with JMeter and logging statements inside of the code.
CPU, Memory (incl garbage collecting) and networktraffic were very, very good, we didn't except some of these results (~40 samples / second -> 3% CPU on a Sun T5120 machine), most overhead was from the backends.
I guess you're correct if you say, SOAP needs more ressources than LDAP, but this is less than you think (in my opinion, of course).
You definetly should do some performance tests and compare the results with the ldap variant.
regards
slowfly

Using XML as persistance

I'm re-writing a swing client that uses regular serialization to files in order to save user data. The data that needs to be persisted to file is very hierarchical by nature. I'm using MVC throughout the application.
Now, I'm considering using XML as the file format for the persistence. I've written an XML schema (xsd) that dictates the data model.
As I've stumbled upon XStream before I first had a look at that for marshalling/unmarshalling my XML. XStream is wonderful but it kind of makes the XML schema validation useless as I see it. So, now I'm looking at JAXB (or maybe XMLBeans) instead as the API between my XML files model layer in the application.
Basically, what I'm looking for is a convenient way to read XML data from file into my data model. Obviously I want to be able to create XML from my data model as well. Will JAXB really save me from doing all the mapping between the XML and data model (POJO's) based on my XML schema?
Am I barking at the wrong tree here? Also, please stop me if you think that XML are a ridiculous way of persisting application data.
Thanks in advance!

Thank you for your input DrClap!
My Swing app is kind of a CAD app where users can make drawings of marinas. Objects can be moved, rotated, connected to each other and grouped and each object has a set of properties. The drawing layout, object props and calculation parameters needs to be persistent. Think MS Visio... Target audience is marine engineers that needs to make force calulations.
Generating an xml file from my xml schema produces a file on about 7Kb (about 200 lines). A real life file would probably be at least 10 times bigger.
I don't see an issue with updating or adding single elements in the XML. This is only done when the user saves to file, in all other cases the application would store data in the model layer. And as I understand it JAXB would handle all XML marhsalling/unmarshalling automagically.
The only thing I'm worried about is having JAXB generating the model classes from my xml schema (xsd). Since I'm working with MVC my current model classes all fire property change events to its controllers whenever a setter is called. This would be lost if JAXB would generate the model for me. Am I right? My assumption with JAXB/XMLBeans is that you update the model by changing your xml schema and then generate/compile you model classes (and ObjectFactory).
Thank you for taking your time to read this!

Calling one WTC service from another WTC service

Hi,
We have a service called COLLECT defined in our WTC server.
Recently we've added a second service called SUM in the same WTC server.
We were wondering if it's possible to call SUM from COLLECT, and if it is, what configuration changes should be made in order to do it?
Currently both services are exported by the WTC server (and imported by our Tuxedo).
Thanks,
Shy

Hi Shy,
Although I haven't tried it, I'm fairly certain you cannot call a Tuxedo EJB using tpcall() within a WTC based application. What I normally advise customers to do when writing a Tuxedo EJB is to implement two separate interfaces. One is obviously the TuxedoService interface that all Tuxedo EJBs must implement. In particular you must implement the service() method that accepts a TPServiceInformation instance that provides access to the typed buffer passed to the EJB. Normally one then extracts the necessary fields or information from the typed buffer, performs whatever necessary business logic needs to be performed, and then constructs a reply typed buffer.
What I recommend is that you separate out the business logic into a separate interface and have your class implement both interfaces. The service() method would only deal with the marshalling/unmarshalling of the information contained in the typed buffers, and leave all business processing to methods on the second interface. Then if you need to access another "service", you would use the second interface, thus saving you from all the typed buffer manipulation.
So in your case, the business logic in the second interface of the COLLECT implementation would simply call the SUM implementations second interface (the EJB's business logic) instead of trying to call a Tuxedo service. While this helps in reuse of the business logic, it doesn't address the issue of trying to transparently move a service implementation from say Tuxedo to WLS. If that's what you are trying to do, you might try exporting the SUM service from WTC to the Tuxedo domain gateway, and then importing the SUM service from that gateway. This would likely cause a network round trip if it works, but it's something to consider.
Another alternative is to use something like the Apache Tuscany/Java project and build your Java applications using SCA. Tuxedo SALT includes a Tuscany/Java binding extension that allows Tuscany/Java applications to transparently call Tuxedo services. The choice of whether to actually call a Tuxedo service or call a Tuscany/Java based SCA service is determine by the binding selection and not changes in your code. Just a thought...
Regards,
Todd Little
Oracle Tuxedo Chief Architect

Using SOAP-JMS binding for business process

Hi all,
We are currently designing one business process which consume MQ messages. The MQ message body is SOAP XML. SOAP Headers carry business specific important data section, so we don't want to loose these headers at any cost. The message consumer is the Websphere process choreographer business process, reading message as a JMS message. When we develop the business process, we are planning to use SOAP-JMS binding. But problem with SOAP-JMS binding is: when the MDB reads the message off the message queue, it strips off all the SOAP headers and delivers only the SOAP body. Is there a way to make this behaviour change to keep the SOAP headers? You may suggest to use JMS bindings, but JMS binding will send the message body as WSIF message (as a serialized java object). I'm not sure of how easy it is to marshalling/unmarshalling of this serialised object. My main concern is around, how to identify the "type" of the message while marshalling. Would writing our own MDB solve the problem? Again MDB's sends messages as WSIF messages to the business process EJB's, which I guess I get stumble across the same marshal/unmarshall problem. Hope I made myself clear of what i'm going trying to do. Any advice is highly appreciated.
Regards,
Prasad

Hello Markus,
I just paste my answer form the other forum entry Re: Business process management strategy in SAP?
in a nutshell BPM Netweaver is focussing on so called edge-processes (usually
SOA-based and often workflow related). These edge-processes a thought to enhance exisitng core business processes and should provide the fast competitive edge versus competitors. Examples would be also xApps. For this Netweaver provides process modelling tools, where you can get exectuable code through the integration between CE and PI. The monitoring part for these processes is mainly targeting business end-users and business manager.
Business Process Monitoring with Solution Manager focusses on core business processes which are realized with the "conventional", "old" SAP Architecture, e.g. Order-to-Cash or Procure-to-Pay. You get a combination of technical monitors (average response times of transactions, background job runtimes, monitors for IDOC or qRFC processing) and application related monitors (you get more than 200 pre-configured application monitors out-of-the-box like number of overdue customer orders or outbound deliveries or number of deliveries with goods issue posted but no invoice). The target group here is the support organization of the customer, from Basis-Support over application support on IT side to process owner on business department side.
Overview presentations can be found under
https://service.sap.com/bpm --> Media Library --> Customer Information -->
"Business Process Monitoring - Part 1 & 2".
Or look under https://www.sdn.sap.com/irj/sdn/nw-processmonitoring
In the end BPM Netweaver and BPMon SolMan are complementary for different purposes and different target groups.
Best Regards
Volker

Serializing Java Bean to XML

I would like to know if it is possible with XMLBeans to convert existing java beans to XML.
I learnt by going trhu' few materials of XMLBeans that we need to create bean classes from XSD and can use these classes for marshalling/unmarshalling.
But I have java beans already defined which I want to serialize/deserialize to/from XML.
Thanks in advance.
--Ramu

If you are not interested in writing a bunch of code (which is probably the case), I know of a couple options for WLS 8.1:
1. Use the "undocumented" and "unsupported" java2xsd class, in the %WL_HOME%\server\lib\webservices.jar.
2. Use the Java2Schema tool in the Systinet Server for Java product.
Here's the contents of a sample build.xml that uses the java2xsd class:
<project
name="java2xsd"
default="assemble"
basedir="."
>
     <path id="compile.classpath">
          <fileset dir="d:/bea81sp4/">
               <include name="lib/tools.jar" />
          </fileset>
          <fileset dir="d:/bea81sp4/weblogic81">
               <include name="server/lib/weblogic.jar"/>
               <include name="server/lib/webservices.jar"/>
          </fileset>
     </path>
     <target name="clean">
          <delete dir="xsd" />
     </target>
     <target name="run-java2xsd">
<delete dir="xsd" />
<mkdir dir="xsd"/>
<java
     classname="weblogic.xml.schema.binding.util.java2xsd"
fork="true"
>
<jvmarg line="-Djava.io.tmpdir=xsd"/>
<arg line="
com.acme.world.schema.x2005.x11.elending.Loan
com.acme.world.schema.x2005.x11.elending.Applicant
com.acme.world.schema.x2005.x11.ebillpay.Account
"/>
<classpath>
<path refid="compile.classpath"/>
<pathelement location="classes"/>
</classpath>
</java>
     </target>
     <target name="assemble" depends="run-java2xsd">
     </target>
</project>
Here, you would replace the paths in the <path> element of course, but you would also need to come up with a way to provide a list of the JavaBean classes to process. The good thing is that java2xsd is smart enough to put all the classes in a given Java package, in the same <xs:schema> element :-) For instance, in:
<arg line="
com.acme.world.schema.x2005.x11.elending.Loan
com.acme.world.schema.x2005.x11.elending.Applicant
com.acme.world.schema.x2005.x11.ebillpay.Account
"/>
the complexType element for "Loan" and "Applicant", will be defined in the same <xs:schema>. There will only be one schemas.xsd file. I don't know of an easy way to change the file name, but it will contain a <xs:schema> for each unique Java package name. Once you have this schemas.xsd file, you can decide how you want to create the XMLBeans from it. You can either break each <xs:schema> element out into it's own .xsd file, or create a WSDL that uses the contents of the schemas.xsd file. You'll notice that there is a <type> element wrapping all the <xs:schema> elements in the schemas.xsd file, which is exactly the name of the element that WSDL uses :-)
Again, java2xsd is not a "supported" class, so don't confuse it (or the information provided above) with being "the tool that BEA provides" for doing what you want to do :-)
Regards,
Mike Wooten

Giving to @XmlJavaTypeAdapter a generic type value

Hi all
I have a critical problem with adapters used at jaxb unmarshall
some of my fields have type enumeration. I decided that is best to use same adapter class for all enums so i created a generic enumeration adapter. I'm not sure if is 100% ok but here it is:
EnumerationAdapter.java :
public class EnumerationAdapter<T extends Enum<T> > extends XmlAdapter<String, Enum<?>> {
    private Class<T> _enumClass;
     * (non-Javadoc)
     * @see javax.xml.bind.annotation.adapters.XmlAdapter#marshal(java.lang.Object)
    @Override
    public String marshal(Enum<?> e) throws Exception {
        return e.toString();
     * (non-Javadoc)
     * @see javax.xml.bind.annotation.adapters.XmlAdapter#unmarshal(java.lang.Object)
    @Override
    public Enum<?> unmarshal(String v) throws Exception {
        // TODO Auto-generated method stub
        return T.valueOf(_enumClass, value);
}The adapter is called at unmarshall but i can't set type T as i want.
The problem is how i declare @XmlJavaTypeAdapter annotation that.
It should be something like this.
@XmlJavaTypeAdapter(EnumerationAdapter<MyEnum>.class)
protected MyEnum field;Of course syntactically is wrong, but i don't know how to declare it correctly. I.m not sure if at least this is possible.
Also i've noticed that i have to give explicit types to annotations ( not like xxx.getClass() ) :(
So I'm in deep d***, please do try to help me.
Thanks all.
Best regards
Marian

I was using it until i discovered a nasty issue
On short: I'm developing an suite of applications that receive an xml command(validated with a xsd schema), unmarshall it in a class. Then do a lot of stuff and then marshall back in xml structure then send it further.
The issue was that i have differentiate an empty xmle element from a missing one. So for tags that are not present is all ok, those xml elements will be ignored and in clas object them will have null value. All good for now.
But if i receive an empty xml element ( this means that i have to set null value for that field in a database...), i have to unmarshall this xml element into a "special" value(different from null) in order to know that i have to recreate empty tag for this element when i marshal object class back into xml command.
So i decided that that fastest solution is to use custom adapters and unmarshall empty tags into null strings for strings ( no [problem here), MININT value for numeric elements; and elements of type enum to use a convention enumfield NULL_VALUE (that i add for every enumeration).
I know that this solution is far from the best but for me i think is the fastest, and this is what matters for me now.
A better solution was to add for every element ( or at least for all non string elements) a field indicator that i set to true when xml element is present and false when is not).
These fields may be regular class members or even annotation for members.
This i can do easily cos all my schema and my classes are generated automatically ( open architecture projects or xjc), and for additionals fields or annotations i can use jaxb plugins, but i have to customize marshall/unmarshall process.
I'm not very familiar with this so it probably will take me at least day or two and i cannot afford to lose even an hour without an concrete result. :(
Hope i wasn't very ambiguous in presentation.
If u have any advice for me please do post it. Thanks again and have a nice day.
Edited by: grandanat on Apr 30, 2009 8:05 AM

What is marshalling/unmarshalling?

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