XML/WSDL Comparison tool

Question

There is no surprise for those who work with web-services a lot that they get updated from time to time. And you always need to track changes of these updates.

In my par

Answer 1

http://membrane-soa.org has a Java API for comparing WSDL in their SOA Model.

package sample.wsdl;

import java.util.List;
import com.predic8.wsdl.*;
import com.predic8.wsdl.diff.WsdlDiffGenerator;
import com.predic8.soamodel.Difference;

public class CompareWSDL {

  public static void main(String[] args) {
    compare();
  }

  private static void compare(){
    WSDLParser parser = new WSDLParser();

    Definitions wsdl1 = parser.parse("resources/diff/1/article.wsdl");

    Definitions wsdl2 = parser.parse("resources/diff/2/article.wsdl");

    WsdlDiffGenerator diffGen = new WsdlDiffGenerator(wsdl1, wsdl2);
    List lst = diffGen.compare();
    for (Difference diff : lst) {
      dumpDiff(diff, "");
    }
  }

  private static void dumpDiff(Difference diff, String level) {
    System.out.println(level + diff.getDescription());
    for (Difference localDiff : diff.getDiffs()){
      dumpDiff(localDiff, level + "  ");
    }
  }
}

After executing you get the output shown in listing 2. It is a List of differences between the two WSDL documents.

Port ArticleServicePTPort removed.
Port ArticleServicePTPort2 added.
Operation create removed.
Operation create2 added.
Schema http://predic8.com/wsdl/material/ArticleService/1/ has changed:
  Element createResponse has changed:
    ComplexType  has changed:
      Sequence has changed:
        Element NewElementForTest added.

For an example of the output from the tool, http://www.service-repository.com/ offers an online WSDL Comparator tool that returns a report of the differences between two WSDL. The report is not a simple XML diff.