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DDCreatorHelper.javaAPI DocApache Ant 1.705371Wed Dec 13 06:16:22 GMT 2006org.apache.tools.ant.taskdefs.optional.ejb

DDCreatorHelper

public final class DDCreatorHelper extends Object
A helper class which performs the actual work of the ddcreator task. This class is run with a classpath which includes the weblogic tools and the home and remote interface class files referenced in the deployment descriptors being built.

Fields Summary
private File
descriptorDirectory
The root directory of the tree containing the textual deployment descriptors.
private File
generatedFilesDirectory
The directory where generated serialised deployment descriptors are written.
String[]
descriptors
The descriptor text files for which a serialised descriptor is to be created.
Constructors Summary
private DDCreatorHelper(String[] args)
Initialise the helper with the command arguments.

        int index = 0;
        descriptorDirectory = new File(args[index++]);
        generatedFilesDirectory = new File(args[index++]);

        descriptors = new String[args.length - index];
        for (int i = 0; index < args.length; ++i) {
            descriptors[i] = args[index++];
        }
Methods Summary
public static voidmain(java.lang.String[] args)
The main method. The main method creates an instance of the DDCreatorHelper, passing it the args which it then processes.

param
args the arguments
throws
Exception on error

        DDCreatorHelper helper = new DDCreatorHelper(args);
        helper.process();
private voidprocess()
Do the actual work. The work proceeds by examining each descriptor given. If the serialised file does not exist or is older than the text description, the weblogic DDCreator tool is invoked directly to build the serialised descriptor.

        for (int i = 0; i < descriptors.length; ++i) {
            String descriptorName = descriptors[i];
            File descriptorFile = new File(descriptorDirectory, descriptorName);

            int extIndex = descriptorName.lastIndexOf(".");
            String serName = null;
            if (extIndex != -1) {
                serName = descriptorName.substring(0, extIndex) + ".ser";
            } else {
                serName = descriptorName + ".ser";
            }
            File serFile = new File(generatedFilesDirectory, serName);

            // do we need to regenerate the file
            if (!serFile.exists() || serFile.lastModified() < descriptorFile.lastModified()
                || regenerateSerializedFile(serFile)) {

                String[] args = {"-noexit",
                                 "-d", serFile.getParent(),
                                 "-outputfile", serFile.getName(),
                                 descriptorFile.getPath()};
                try {
                    weblogic.ejb.utils.DDCreator.main(args);
                } catch (Exception e) {
                    // there was an exception - run with no exit to get proper error
                    String[] newArgs = {"-d", generatedFilesDirectory.getPath(),
                                 "-outputfile", serFile.getName(),
                                 descriptorFile.getPath()};
                    weblogic.ejb.utils.DDCreator.main(newArgs);
                }
            }
        }
private booleanregenerateSerializedFile(java.io.File serFile)
EJBC will fail if the serialized descriptor file does not match the bean classes. You can test for this by trying to load the deployment descriptor. If it fails, the serialized file needs to be regenerated because the associated class files don't match.

        try {

            FileInputStream fis = new FileInputStream(serFile);
            ObjectInputStream ois = new ObjectInputStream(fis);
            DeploymentDescriptor dd = (DeploymentDescriptor) ois.readObject();
            fis.close();

            // Since the descriptor read properly, everything should be o.k.
            return false;

        } catch (Exception e) {

            // Weblogic will throw an error if the deployment descriptor does
            // not match the class files.
            return true;

        }