Examples of org.drools.ChangeSet

org.drools.ChangeSet
s.org/drools-5.0/change-set' xmlns:xs='http://www.w3.org/2001/XMLSchema-instance' xs:schemaLocation='http://drools.org/drools-5.0/change-set drools-change-set-5.0.xsd' > <add> <resource source='http:org/domain/myrules.drl' type='DRL' /> <resource source='classpath:data/IntegrationExampleTest.xls' type="DTABLE"> <decisiontable-conf input-type="XLS" worksheet-name="Tables_2" /> </resource> <resource source='file:org/drools/decisiontable/myflow.drf' type='DRF' /> </add> </change-set>
Notice that each resource defines a protocol for it's source, this is because when using a ChangeSet all resource elements are turned into a URL instance, so it obeys the format as provided by the JDK URL class. There is one exception which is the classpath protocol, which is handled separately. Here the resource is loaded from the classpath, where it uses the default ClassLoader of the KnowledgeBase.

A path, when using file based protocols, can point to a folder. In such a situation all the resources in that folder will be added. When used with a KnowledgeAgent, which is also set to scan directories, it will continue to scan the directory for new or removed resources.

The ChangeSet can be used as a ResourceType with the KnowledgeBuilder or applied directly to a KnowledgeAgent.

Example showing a changeset being used with a KnowledgeBuilder:
```
 KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(); kbuilder.add( ResourceFactory.newUrlResource( url ), ResourceType.ChangeSet ); 
```
Example showing a changeset being applied to a KnowledgeAgent:
```
 KnowledgeAgent kagent = KnowledgeAgentFactory.newKnowledgeAgent( "MyAgent" ); kagent.applyChangeSet( ResourceFactory.newUrlResource( url ) ); KnowledgeBase kbase = kagent.getKnowledgeBase(); 
```
This interface, as well as ResourceChangeMonitor, ResourceChangeNotifier, ResourceChangeScanner and ResourceChangeListener are still considered subject to change. Use the XML format change-set, as part of the ResourceType api when adding to KnowledgeBuilder, which is considered stable.

                                   ( (ClassPathResource) resource ).getClazz() );
        } else {
            reader.setClassLoader( this.configuration.getClassLoader(),
                                   null );
        }
        ChangeSet changeSet = reader.read( resource.getReader() );
        if (changeSet == null) {
            // @TODO should log an error
        }
        for (Resource nestedResource : changeSet.getResourcesAdded()) {
            InternalResource iNestedResourceResource = (InternalResource) nestedResource;
            if (iNestedResourceResource.isDirectory()) {
                for (Resource childResource : iNestedResourceResource.listResources()) {
                    if (( (InternalResource) childResource ).isDirectory()) {
                        continue; // ignore sub directories

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                if ( resource instanceof ClassPathResource ) {
                    reader.setClassLoader( ((ClassPathResource) resource).getClassLoader() );
                } else {
                    reader.setClassLoader( this.configuration.getClassLoader() );
                }
                ChangeSet chageSet = reader.read( resource.getReader() );
                if ( chageSet == null ) {
                    // @TODO should log an error
                }
                for ( Resource nestedResource : chageSet.getResourcesAdded() ) {
                    InternalResource iNestedResourceResource = (InternalResource) nestedResource;
                    if ( iNestedResourceResource.isDirectory() ) {
                        this.resourceDirectories.add( iNestedResourceResource );
                        for ( Resource childResource : iNestedResourceResource.listResources() ) {
                            if ( ((InternalResource) childResource).isDirectory() ) {

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        str += "        </resource>";
        str += "    </add> ";        
        str += "</change-set>";


        StringReader reader = new StringReader( str );
        ChangeSet changeSet = xmlReader.read( reader );


        assertEquals( 2,
                      changeSet.getResourcesAdded().size() );
        UrlResource resource = ( UrlResource ) ((List)changeSet.getResourcesAdded()).get( 0 );
        assertNull( resource.getConfiguration() );
        assertEquals( "http://www.domain.com/test.drl",
                      resource.getURL().toString() );
        assertEquals( ResourceType.DRL,
                      resource.getResourceType() );


        resource =  ( UrlResource ) ((List)changeSet.getResourcesAdded()).get( 1 );
        
        assertEquals( "http://www.domain.com/test.xls",
                      resource.getURL().toString() );        
        assertEquals( ResourceType.DTABLE,
                      resource.getResourceType() );

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        str += "        <resource source='http://localhost:8081/jboss-brms/org.drools.guvnor.Guvnor/package/defaultPackage/LATEST' type='PKG' basicAuthentication='enabled' username='admin' password='pwd'/>";
        str += "    </add> ";        
        str += "</change-set>";


        StringReader reader = new StringReader( str );
        ChangeSet changeSet = xmlReader.read( reader );


        assertEquals( 1,
                      changeSet.getResourcesAdded().size() );
        UrlResource resource = ( UrlResource ) ((List)changeSet.getResourcesAdded()).get( 0 );
        assertNull( resource.getConfiguration() );
        assertEquals( "http://localhost:8081/jboss-brms/org.drools.guvnor.Guvnor/package/defaultPackage/LATEST",
                      resource.getURL().toString() );
        assertEquals( "enabled", resource.getBasicAuthentication() );
        assertEquals( "admin", resource.getUsername() );

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                                           ((ClassPathResource) resource).getClazz() );
                } else {
                    reader.setClassLoader( this.configuration.getClassLoader(),
                                           null );
                }
                ChangeSet changeSet = reader.read( resource.getReader() );
                if ( changeSet == null ) {
                    // @TODO should log an error
                }
                for ( Resource nestedResource : changeSet.getResourcesAdded() ) {
                    InternalResource iNestedResourceResource = (InternalResource) nestedResource;
                    if ( iNestedResourceResource.isDirectory() ) {
                        this.resourceDirectories.add( iNestedResourceResource );
                        for ( Resource childResource : iNestedResourceResource.listResources() ) {
                            if ( ((InternalResource) childResource).isDirectory() ) {

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                                           ((ClassPathResource) resource).getClazz() );
                } else {
                    reader.setClassLoader( this.configuration.getClassLoader(),
                                           null );
                }
                ChangeSet changeSet = reader.read( resource.getReader() );
                if ( changeSet == null ) {
                    // @TODO should log an error
                }
                for ( Resource nestedResource : changeSet.getResourcesAdded() ) {
                    InternalResource iNestedResourceResource = (InternalResource) nestedResource;
                    if ( iNestedResourceResource.isDirectory() ) {
                        this.resourceDirectories.add( iNestedResourceResource );
                        for ( Resource childResource : iNestedResourceResource.listResources() ) {
                            if ( ((InternalResource) childResource).isDirectory() ) {

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                                   null );
        }
        Reader resourceReader = null;
        try {
            resourceReader = resource.getReader();
            ChangeSet changeSet = reader.read( resourceReader );
            if (changeSet == null) {
                // @TODO should log an error
            }
            for (Resource nestedResource : changeSet.getResourcesAdded()) {
                InternalResource iNestedResourceResource = (InternalResource) nestedResource;
                if (iNestedResourceResource.isDirectory()) {
                    for (Resource childResource : iNestedResourceResource.listResources()) {
                        if (( (InternalResource) childResource ).isDirectory()) {
                            continue; // ignore sub directories

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        } else {
            reader.setClassLoader( ((AbstractRuleBase) (((KnowledgeBaseImpl) this.kbase).ruleBase)).getConfiguration().getClassLoader(),
                                   null );
        }


        ChangeSet changeSet = null;
        try {
            changeSet = reader.read( resource.getReader() );
        } catch ( Exception e ) {
            this.listener.exception( new RuntimeException(
                                                           "Unable to parse ChangeSet",

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        str += "        </resource>";
        str += "    </add> ";        
        str += "</change-set>";


        StringReader reader = new StringReader( str );
        ChangeSet changeSet = xmlReader.read( reader );


        assertEquals( 2,
                      changeSet.getResourcesAdded().size() );
        UrlResource resource = ( UrlResource ) ((List)changeSet.getResourcesAdded()).get( 0 );
        assertNull( resource.getConfiguration() );
        assertEquals( "http://www.domain.com/test.drl",
                      resource.getURL().toString() );
        assertEquals( ResourceType.DRL,
                      resource.getResourceType() );


        resource =  ( UrlResource ) ((List)changeSet.getResourcesAdded()).get( 1 );
        
        assertEquals( "http://www.domain.com/test.xls",
                      resource.getURL().toString() );        
        assertEquals( ResourceType.DTABLE,
                      resource.getResourceType() );

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    public boolean isUseKBaseClassLoaderForCompiling() {
        return useKBaseClassLoaderForCompiling;
    }


    public void applyChangeSet(Resource resource) {
        ChangeSet cs = getChangeSet( resource );
        if ( cs != null ) {
            applyChangeSet( cs );
        } else {
            this.listener.warning(" Warning : KnowledgeAgent was requested to apply a Changeset, but no Changeset could be determined", resource);
        }

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Related Classes of org.drools.ChangeSet

org.drools.agent.impl.KnowledgeAgentImpl

org.drools.compiler.PackageBuilder

org.drools.compiler.xml.changeset.ChangeSetTest

org.drools.io.impl.ResourceChangeScannerImpl

org.drools.xml.changeset.AddHandler

org.drools.xml.changeset.ChangeSetTest

org.drools.xml.changeset.ModifyHandler

org.drools.xml.changeset.RemoveHandler

org.drools.xml.XmlChangeSetReaderTest

org.jboss.internal.soa.esb.services.rules.DroolsRuleBaseHelper

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