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Web Services for J2EE, Version 1.0 Change
Log
Web Services for J2EE, Version 1.0
Change Log
Document last updated: 07/31/2003
Description
This document describes the set of change
requests Proposed, Accepted, and Deferred
per the JSPA section 4. These are changes to the Web Services for
J2EE Version 1.0 specification and intended
to result in a version of the specification
for integration with J2EE 1.4.
Maintenance Lead
Jim Knutson, IBM
Feedback
Comments should be sent to wsee-spec-comments@us.ibm.com.
Proposed Changes
All changes to the final release must be
listed here and approved by the EC.
Request |
Summary |
Specification Changes |
21 |
Add SOAP Header fault mappings |
Section 7.3.5, add part-name element to exception-mappingType to allow for associating a header fault with the actual header in question (by part-name of the message).
This is necessary when more than one header is passed. |
22 |
Add additional JAX-RPC 1.1 type mappings |
Clarifies request 16 and adds support for mapping attribute elements. Section 7.3.5, add xml-attribute-name element, xml-wildattribute element, and xml-wildcard element to variable-mappingType. These are modeled after xml-element-name use. |
23 |
Clarify how element refs should be handled in variable-mappingType. |
Section 7.3.5, add the following description to xml-element-name:
The
value of an xml-element-name element must match the value of the ref
attribute if mapping an element reference.
A similar phrase will be added to xml-attribute-name as part of request 22. |
24 |
Fix java-xml-type-mapping class-type |
A java-xml-type-mapping can map to more than just a Java class. It can map to primitives and arrays of types. In section 7.3.5, rename class-type to java-type
and change its type to j2ee:java-typeType. |
Accepted Changes
Changes approved by the EC move to this section.
Request |
Summary |
Specification Changes |
1 |
Change version to 1.1 |
Title page, replace:
Version 1.0
With:
Version 1.1
Page 2, replace
Version: 1.0
With:
Version: 1.1
|
2 |
Add EJB 2.1 web services view. |
Itemize references to EJB remote interface/home
interface requirements where the EJB
2.1
web services client view needs to be
injected.
Section 3.10, item 1, replace:
The service provider implements the
Web service
business logic by implementing a stateless
session EJB. The EJB�s remote interface
method
signatures must match the method signatures
of the Service Endpoint Interface and
must
include all methods of the Service
Endpoint
Interface.
With:
The service provider implements the
Web service
business logic by creating a stateless
session
Bean that implements the methods of
the Service
Endpoint Interface as described in
the Enterprise
JavaBeans 2.1 specification.
Section 8.1 paragraph 6, replace:
In general, the deployment tool generates
a servlet to handle parsing the incoming
SOAP request, create a remote stateless
session
EJBObject and dispatch the request
to the
stateless session EJB. The methods
of the
SEI are described by the remote interface,
the deployment tool can generate a
servlet
that dispatches to the remote interface
of
the EJB.
With:
In general, the deployment tool generates
a servlet to handle parsing the incoming
SOAP request, the servlet obtains a reference
to an instance of an appropriate EJBObject
and dispatches the request to the stateless
session EJB.
|
3 |
Make EJB 2.0 based web services optional. |
Itemize references to EJB remote interface/home
interface requirements that need to be made
optional. Optional support for J2EE 1.3 based
web services is accomplished by referring
to the original Web Services for J2EE 1.0
specification.
Section 3.10 item 1, remove:
The EJB�s remote interface method signatures
must match the method signatures of
the Service
Endpoint Interface and must include
all methods
of the Service Endpoint Interface.
Section 5.3.2.1.3, remove entire section:
5.3.2.1.3 Exposing an existing EJB
An existing Enterprise JavaBean may be used
as a Service Implementation Bean if it meets
the following requirements:
� The business methods of the EJB bean class
that are exposed on the SEI must meet the
Service Implementation Bean requirements
defined in section 5.3.1.
� The Service Endpoint Interface methods
must be a subset of the remote interface
methods of the EJB and the SEI must meet
the requirements described in the JAX-RPC
specification for Java->WSDL mapping.
� The transaction attributes of the SEI methods
must not include Mandatory.
The developer must package the Web
service
as described in section 5.4 and must
specify
an ejb-link from the port in the Web
services
deployment descriptor to the existing
EJB.
Section 8.1, 3rd bullet, remove:
If the Service Implementation Bean is an
EJB, the SEI methods are fully contained
by the remote interface.
Section 8.2.9, bullet 7, remove:
If the Service Implementation Bean is an
EJB, the SEI methods are not fully contained
by the remote interface.
Add Appendix:
Optional support for J2EE 1.3 platforms
Web Services for J2EE Version 1.1 does not
require support for applications built
according
to the Web Services for J2EE Version
1.0
specification. A vendor may optionally
support
Web Services for J2EE 1.0 by implementing
that version of the specification.
See the
Web Services Version 1.0 Change Log
for more
details on the differences between
the two
specifications.
|
4 |
Add J2EE 1.4 based XML Schemas |
Create new Chapter 7 info with XML Schema
specific info. Describe the general
1-1 mapping
of DTD to XML Schema elements for most
elements
and detail where it isn't 1-1 and why.
Section 7.1.5, replace DTD with XML Schema
Section 7.2.2, 4th bullet, remove:
Scope. If the service reference is
being
defined within an EJB-JAR, the service-ref
elements must be defined within a component-scoped-refs
element so that the service-ref can be associated
with a particular EJB. The association
with
the EJB is defined by the component-name
element.
Section 7.2.2?, add note regarding service-endpoint
declaration in EJB 2.1 deployment descriptor.
Section 7.2.5, replace DTD with XML Schema.
Section 7.3.5, replace section name:
JAX-RPC Mapping DTD
with:
JAX-RPC Mapping Schema
Section 7.3.5: replace DTD with XML Schema. |
5 |
Make the DTD based schemas optional. |
See Appendix change in item 3. |
6 |
Make Holders required for EJB container. |
Modify statement saying that Holders are
optional for the EJB container to say
they
are optional only for an EJB 2.0 container.
Section 5.3, first definition list item,
move the following to the appendix:
Support for OUT and IN/OUT parameters
is
optional for the EJB container.
Section 5.3, second definition list item,
move the following to the appendix:
Support for Holder parameters is optional
for the EJB container.
Section 5.3.1, move the last paragraph to
the appendix:
JAX-RPC defines Holders as non-serializable
classes which cannot be implemented
by the
remote interface of an Enterprise JavaBean.
Therefore, support for an SEI which
uses
Holders for parameters is not required
for
Port components deployed in the EJB
container
|
7 |
Make Handler support required for EJB container |
Remove statement saying that Handlers are
optional for the EJB container.
Section 6.1, last paragraph, remove:
This specification makes Handler support
in the EJB container optional due to
the
required EJB container changes that
would
be necessary to implement Handler support.
It is expected that EJB Handler support
will
be made required in a future J2EE specification.
Section 6.2.4, last paragraph, remove:
A container provider is not required
to support
Handlers for Port component�s that
run in
the EJB container. It is expected this
will
be required when this specification
is included
in J2EE 1.4.
|
8 |
Change references to extension of J2EE 1.3
to include integration into J2EE 1.4 |
Chapter 2, last paragraph, remove:
The relation of this specification to J2EE
1.4 is defined in Appendix A.
Section 2.1.3, second bullet, replace:
The Web service deployment is supported on
top of existing J2EE 1.3 environments.
With:
The Web service deployment is supported on
J2EE 1.4 environments.
Appendix A, J2EE APIs, replace:
Enterprise JavaBeans 2.0 defines the programming
model for implementing Web services
which
run in the EJB container.
Servlet 2.3 defines the packaging and container
service model for implementing Web
services
which run in the servlet container.
J2EE 1.4, EJB 2.1, and Servlet 2.4 will include
the Web services specification defined within
this specification. An effort will be made
to maintain compatibility and ease migration
to J2EE 1.4, but there is no guarantee that
compatibility will be ensured. A JSR 109
1.1 maintenance release will address XML
Schema based deployment descriptors, the
EJB 2.1 Web services view, as well as Holder
and Handler class usage in the EJB container
for use by J2EE 1.4 With:
Enterprise JavaBeans 2.1 defines the programming
model for implementing Web services which
run in the EJB container.
Servlet 2.4 defines the packaging and container
service model for implementing Web services
which run in the servlet container.
|
9 |
Clarify port address requirement. |
Section 4.2.2.4, replace:
The port address attribute may be absent
from the WSDL or may be a dummy value.
with:
The port address location attribute may be
absent from the WSDL or may be a dummy
value.
|
10 |
Clarify publication requirements. |
Section 4.2.6, replace:
WSDL files are located relative to the root
of the module and are typically co-locatedwith the module's deployment descriptor.
with:
WSDL files are located relative to the root
of the module and are typically located in
the wsdl directory that is co-located with the module
deployment descriptor or a subdirectory of
it.
Section 5.4, replace:
WSDL files are located relative to the root
of the module and are typically co-located with the module deployment descriptor.
with:
WSDL files are located relative to the root
of the module and are typically located in
the wsdl directory that is co-located with the module
deployment descriptor or a subdirectory
of
it.
Add new section 5.4.1 before current
5.4.1
(renumber appropriately):
The wsdl directory is a well-known location that
contains WSDL files and any relative content
the WSDL files may reference. WSDL files
and their relative references will be published
during deployment. See section 8.2.4 and
8.2.5 for more details.
Add to the end of old section number
5.4.1
EJB Module Packaging (now 5.4.2):
The wsdl directory is located at META-INF/wsdl.
Add to the end of old section number
5.4.2
Web App Module Packaging (now 5.4.3):
The wsdl directory is located at WEB-INF/wsdl.
Add to section 7.1.2 Port's WSDL description bullet:
The WSDL file may reference (e.g. import)
other files contained within the module using
relative references. It may also reference
other files external to the module using
an explicit URL. Relative imports are declared
relative to the file defining the import.
Imported files may import other files as
well using relative locations or explicit
URLs. It is recommended that the WSDL file
and relative referenced files be packaged
in the wsdl directory as described in section 5.4.1. Relative references must not start with
a �/�.
Add to section 7.2.2 WSDL definition bullet:
The WSDL file may reference (e.g. import)
other files contained within the module using
relative references. It may also reference
other files external to the module using
an explicit URL. Relative imports are declared
relative to the file defining the import.
Imported files may import other files as
well using relative locations or explicit
URLs. Relative references must not start
with a �/�.
Section 8.2.3, add to end of first paragraph:
The container must not update a WSDL file
located in the document root of a WAR file.
Add new section 8.2.4:
8.2.4
Publishing the service-ref WSDL
The deployment tool and/or container must
make the WSDL document that a service-ref is bound to available via a URL returned by the Service Interface getWSDLDocumentLocation() method. This may or may not be the same
WSDL document packaged in the module. The
process of publishing the bound service-ref WSDL is analogous to publishing deployed
WSDL, but only the service-ref that is bound to it is required to have
access to it. A Web Services for J2EE provider
is required to provide a URL that maintains the referential integrity
of the WSDL document the service-ref is bound to if the wsdl-file element refers to a document located in
the wsdl directory or one of its subdirectories.
Add to the end of section 8.2.5 (was 8.2.4):
A Web Services for J2EE provider is required
to support publishing a deployed WSDL document
if the Web services deployment descriptor
(webservices.xml) wsdl-file element refers to a WSDL file contained
in the wsdl directory or subdirectory, as described
in section 5.4.1. A provider may publish the static content (e.g. no JSPs or Servlets)
of the entire wsdl directory and all its subdirectories if the deploy tool cannot compute the minimal
set of documents to publish in order to maintain
referential integrity. The recommended practice is to place WSDL
files referenced by awsdl-file element and their relative imported documents
under the wsdl directory.
Web Services for J2EE providers are free
to organize the published WSDL documents
however they see fit so long as referential
integrity is maintained. For example, the
wsdl directory tree may be collapsed to a flat
published directory structure (updating import
statements appropriately). Clients should
not depend on the wsdl directory structure being maintained during
publication. Access to relatively imported
documents should only be attempted by traversing
the published WSDL document at the location
chosen by the deployer.
|
11 | Clarify resource access from handlers | Section 6.2.3, replace:
A Handler may access transactional resources
in a local transaction mode.
with
A Handler may access transactional resources
defined by a component's resource-refs. Resources are accessed under a transaction
context according to section 6.2.2.3.
|
12 | Clarify request 9 |
Section 4.2.24, replace:
The port address location attribute may be
absent from the WSDL or may be a dummy
value.
with:
The port address location attribute of a
port using a SOAP/HTTP binding must begin
with http: or https:.
Section 8.1, replace:
The WSDL port address for the Port component
is the combination of the web app context-root and servlet url-pattern.
with:
The WSDL port address for the Port component
is the combination of the web app context-root and url-pattern of the servlet-mapping.
|
13 | Correct WSDL filenames | Section (newly renumbered) 8.2.5, replace:
StockQuoteDescription.xml
with:
StockQuoteDescription.wsdl
|
14 | Remove redundant text. | Section 9.1.1, remove:
J2EE application server can handle the request
similar to how it handles other HTTP
requests.
|
15 | Clarify request 10 | Section 8.2.5, add:
A vendor may support publication of WSDL
files packaged in other locations,
but these
are considered non-portable.
|
16 | Add support for xsd:any | Add new section 7.3.2.1 Mapping xsd:any:
Mapping for xsd:any
is described by the JAX-RPC specification. JAX-RPC
defines this as a mapping to/from javax.xml.soap.SoapElement
or an array of type SoapElement.
|
17 | Add support for anonymous types | Add section 7.3.2.2 Mapping anonymous types:
Anonymous types require some special handling
in order to provide a mapping. Anonymous types have no QName, but
dealing with mappings, serializers, and deserializers becomes much
easier if they are assigned QNames. Anonymous types are treated as
root WSDL types with special QNames and are mapped using the
java-xml-type-mapping. In order to achieve some portability in
determining what anonymous type a java-xml-type-mapping refers to,
the following rules must be used.
1.
For type T, the localname of T is determined as follows:
a.
If T has a name
attribute, then it's name is the value of the name attribute
b.
If T has no name
attribute, then its name is�>E� where E is the name of its
enclosing element.
2.
For element E, the localname of E is:
a. If E is at the root level, then the
name is �N� where N is the value of the name attribute.
b. If E is not at the root level, then
the name �T>N� where T is the name of the enclosing type and N is
the value of the name attribute.
3.
If element E has a maxOccurs attribute greater than 1, then
it also has a 'hidden' anonymous type called A. A is an array of the
enclosed type. The name
of A is...
a. If E has a name attribute, then the
name of A is
"E[<minOccursValue>,<maxOccursValue>]" where E
is the value of E�s name attribute.
b. If E has no name attribute, then
the name of A is
"R[<minOccursValue>,<maxOccursValue>]" where R
is the name of the referent element.
Note that only root level types and elements
have a namespace, so all anonymous types acquire their namespaces
from the enclosing root level element or type.
Hidden anonymous array types, as defined in
rule 3, are declared in a param-type element as the name of the Java
type of type T appended with �[]� if the mapping is to a Java array.
This is the only supported and portable mapping for hidden anonymous
array types at this time.
The following example will help illustrate
anonymous types and their mappings. Example name rule uses are underlined:
<schema �
targetNamespace=�X�>
<complexType1 name=�root�>
�
</complexType>
<element2 name="root" minOccurs="0"
maxOccurs="unbounded"3>
<complexType4>
<sequence>
<element5 name="inside" maxOccurs="10"6>
<complexType7>
...
</complexType>
</element>
<element ref="someOtherElement" maxOccurs="20"8/>
</sequence>
</complexType>
</element>
<
element9
name=�someOtherElement� type=�xsd:int�>
There
are 9 named types. Their names are defined as:
Use case
|
Rule based name
|
Based on rule
|
1
|
{X}root
|
Rule 1.a
|
2
|
{X}root
|
Rule 2.a
|
3
|
{X}root[0,unbounded]
|
2
and rule 3.a
|
4
|
{X}>root
|
2
and rule 1.b
|
5
|
{X}>root>inside
|
4
and rule 2.b
|
6
|
{X}>root>inside[,10]
|
5
and rule 3.a
|
7
|
{X}>>root>inside
|
5
and rule 1.b
|
8
|
{X}someOtherElement[,20]
|
9
and rule 3.b
|
9
|
{X}someOtherElement
|
Rule 2.a
|
|
18 | Update Interoperability Requirements | Section 3.7, add a bullet:
Section 8.1, add a paragraph:
It is recommended that containers provide logging functionality similar to that of the WS-I "Monitor" tool. Such contains would log all incoming and outgoing messages in the format defined by the WS-I Testing Tools group and would allow capturing SOAP messages exchanged over the HTTPS protocol in a way that allows analysis by the WS-I tools.
Section 8.2.1, add a paragraph:
A deployment tool must be able to deploy a WS-I Basic Profile 1.0 compliant application. Validating an application for WS-I Basic Profile 1.0 conformance is considered a value add. New Section 8.2.5, add a paragraph:
Requirements for publishing WSDL documents to a UDDI V2 directory are described by the WS-I Basic Profile 1.0 specification. |
19 | Correct namespace | Section 6.2.2.2, replace
http://www.w3.org/2001/09/soap-envelope with:
http://schemas.xmlsoap.org/soap/envelope/ |
20 | Clarify interoperability requirements | Section 4.2 and 5.6, add:
The container must comply with the JAX-RPC specification Chapter 14 Interoperability requirements. Section 6.1, add:
J2EE applications that define one or more port components or service references include WSDL descriptions for each of them as well as application logic and (optionally) SOAP message handlers associated with them. In order for such applications to behave predictably, all three elements (description, handlers and application logic) must be well aligned. Developers should program handlers carefully in order not to create invalid SOAP envelope format that contradicts WS-I BP 1.0 requirements or violates the message schema declared in the WSDL. In particular, containers cannot provide any guarantees beyond those specified as part of the interoperability requirements on the behavior of an application that violates the assumptions embedded in a WSDL document either in its business logic or in SOAP message handlers. |
Note: I looked at the Servlet 2.4 PFD and
it doesn't appear that any change needs to
be made to cover it.
Deferred Changes
Changes deferred by the EC move to this section.
|