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README.md

README.md

Unmaintained Repository

Unmaintained repository. Development moved to: https://github.com/nordic-institute/xrd4j

xrd4j is now actively developed by the Nordic Institute for Interoperability Solutions (NIIS) The original xrd4j codebase here will be kept for archive purposes.

XRd4J

XRd4J is a Java library for building X-Road v6 Adapter servers and clients. The library implements X-Road v6 SOAP profile v4.0 and Service Metadata Protocol. The library takes care of serialization and deserialization of SOAP messages offering built-in support for standard X-Road SOAP headers; only processing of application specific request and response content remains to be implemented.

Library Modules

  • client : SOAP client that generates X-Road v6 SOAP messages that can be sent to X-Road Security Server. Includes request serializer and response deserializer.
  • server : Provides an abstract servlet that can be used as a base class for Adapter Server implementations. Includes a request deserializer and a response serializer.
  • common : General purpose utilities for processing SOAP messages and X-Road v6 message data models.
  • rest : HTTP clients that can be used for sending requests to web services from Adapter Server.

Maven Repositories

Release Repository

All XRd4J release versions are available through the CSC Maven Repository https://maven.csc.fi/repository/internal/.

Add the CSC Maven Repository in your POM-file inside the <repositories> tag:

<repository>
  <id>csc-repo</id>
  <name>CSC's Maven repository</name>
  <url>https://maven.csc.fi/repository/internal/</url>
</repository>

If running mvn clean install generates the error

Failed to collect dependencies at fi.vrk.xrd4j:common:jar:0.2.0: Failed to read artifact descriptor for fi.vrk.xrd4j:common:jar:0.2.0: Could not transfer artifact fi.vrk.xrd4j:common:pom:0.2.0 from/to csc-repo (https://maven.csc.fi/repository/internal/): sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target -> [Help 1]

you can either skip the certificate validation with command

mvn install -Dmaven.wagon.http.ssl.insecure=true -Dmaven.wagon.http.ssl.allowall=true

or import the CSC Maven repository certificate as a trusted certificate into cacerts keystore. See full instructions for more information.

Dependency Declaration

Declare the following dependencies in your POM-file:

<!-- Module: common-->
<dependency>
  <groupId>fi.vrk.xrd4j</groupId>
  <artifactId>common</artifactId>
  <version>0.2.0</version>
</dependency>

<!-- Module: client-->
<dependency>
  <groupId>fi.vrk.xrd4j</groupId>
  <artifactId>client</artifactId>
  <version>0.2.0</version>
</dependency>

<!-- Module: server-->
<dependency>
  <groupId>fi.vrk.xrd4j</groupId>
  <artifactId>server</artifactId>
  <version>0.2.0</version>
</dependency>

<!-- Module: rest-->
<dependency>
  <groupId>fi.vrk.xrd4j</groupId>
  <artifactId>rest</artifactId>
  <version>0.2.0</version>
</dependency>

Snapshot Repository

Snapshot versions of XRd4J are available through the CSC Maven Snapshot repository in https://maven.csc.fi/repository/snapshots/.

Include the snapshot repository in your POM-file inside the <repositories> tag:

<repository>
  <id>csc-snapshot-repo</id>
  <name>CSC's snapshot Maven repository</name>
  <url>https://maven.csc.fi/repository/snapshots/</url>
</repository>

After this, x.x.x-SNAPSHOT versions are available to be declared as dependencies as with release versions above. XRd4J snapshots are meant for development use only. Use release versions for final adapter implementations.

Development

XRd4J Development

Instructions for setting up an environment for XRd4J-related development can be found here.

Javadocs can be generated with the included script generate-javadocs.sh. The script will create javadoc folder with HTML documentation.

The most essential classes of the library are:

  • fi.vrk.xrd4j.common.member.ConsumerMember : represents an X-Road consumer member that acts as a client that initiates a service call by sending a ServiceRequest.
  • fi.vrk.xrd4j.common.member.ProducerMember : represents an X-Road producer member that produces services to X-Road.
  • fi.vrk.xrd4j.common.message.ServiceRequest<?> : represents an X-Road service request that is sent by a ConsumerMember and received by a ProviderMember. Contains the sent SOAP request.
  • fi.vrk.xrd4j.common.message.ServiceResponse<?, ?> : represents an X-Road service response message that is sent by a ProviderMember and received by a ConsumerMember. Contains the SOAP response.
  • fi.vrk.xrd4j.client.serializer.AbstractServiceRequestSerializer : an abstract base class for service request serializers.
  • fi.vrk.xrd4j.server.deserializer.AbstractCustomRequestDeserializer<?> : an abstract base class for service request deserializers.
  • fi.vrk.xrd4j.server.serializer.AbstractServiceResponseSerializer : an abstract base class for service response serializers.
  • fi.vrk.xrd4j.client.deserializer.AbstractResponseDeserializer<?, ?> : an abstract base class for service response deserializers.
  • fi.vrk.xrd4j.client.SOAPClientImpl : a SOAP client that offers two methods for sending SOAPMessage and ServiceRequest objects.
  • fi.vrk.xrd4j.server.AbstractAdapterServlet : an abstract base class for Servlets that implement SOAP message processing. Can be used as a base class for Adapter Server implementations.

Adapter Development Using XRd4J

For implementation details and tips for creating an X-Road service adapter using XRd4J see adapter implementation overview.

Testing HTTPS connectivity may require setting up SSL on Tomcat. Basic instructions for this can be found here.

Compatibility Mode With Older X-Road Versions

To enable processing of SOAP Body elements in compatibility mode with older versions of X-Road protocol, method request.setProcessingWrappers(true) must be called before serialization or deserialization of messages. This means that request messages must contain request wrapper and response messages must contain request and response wrappers. To skip automatic procession of request and response wrappers, method request.setProcessingWrappers(false) must be called before serialization or deserialization of messages, which is the default. The usage of setProcessingWrappers method is demonstrated in the the adapter implementation examples.

Credits

XRd4J library was originally developed by Petteri Kivimäki (https://github.com/petkivim) during 2014-2017. In June 2017 it was agreed that Population Register Centre (VRK) takes maintenance responsibility. In June 2018 maintenance of the repository moved to NIIS.