/*
* Copyright 2005 JBoss Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.drools.guvnor.server.contenthandler;
import com.google.gwt.user.client.rpc.SerializationException;
import org.apache.commons.lang.StringEscapeUtils;
import org.drools.compiler.DroolsParserException;
import org.drools.compiler.PackageBuilderConfiguration;
import org.drools.guvnor.client.rpc.Asset;
import org.drools.guvnor.client.rpc.RuleFlowContentModel;
import org.drools.guvnor.server.builder.AssemblyErrorLogger;
import org.drools.guvnor.server.builder.BRMSPackageBuilder;
import org.drools.guvnor.server.builder.RuleFlowContentModelBuilder;
import org.drools.guvnor.server.builder.RuleFlowProcessBuilder;
import org.drools.guvnor.server.util.LoggingHelper;
import org.drools.ide.common.client.modeldriven.brl.PortableObject;
import org.drools.repository.AssetItem;
import org.jbpm.bpmn2.xml.BPMNDISemanticModule;
import org.jbpm.bpmn2.xml.BPMNSemanticModule;
import org.jbpm.bpmn2.xml.XmlBPMNProcessDumper;
import org.jbpm.compiler.xml.XmlProcessReader;
import org.jbpm.compiler.xml.XmlRuleFlowProcessDumper;
import org.jbpm.ruleflow.core.RuleFlowProcess;
import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import org.drools.guvnor.client.configurations.ApplicationPreferences;
public class BPMN2ProcessHandler extends ContentHandler
implements
ICompilable,
ICanRenderSource {
private static final LoggingHelper log = LoggingHelper.getLogger( BPMN2ProcessHandler.class );
public void retrieveAssetContent(Asset asset,
AssetItem item) throws SerializationException {
RuleFlowProcess process = readProcess( new ByteArrayInputStream( item.getContent().getBytes() ) );
if ( process != null ) {
RuleFlowContentModel content = RuleFlowContentModelBuilder.createModel( process );
content.setXml( item.getContent() );
asset.setContent( content );
} else {
// we are very fault tolerant
RuleFlowContentModel content = new RuleFlowContentModel();
content.setXml( item.getContent() );
asset.setContent( content );
}
}
protected RuleFlowProcess readProcess(InputStream is) {
RuleFlowProcess process = null;
try {
InputStreamReader reader = new InputStreamReader( is );
PackageBuilderConfiguration configuration = new PackageBuilderConfiguration();
configuration.initSemanticModules();
configuration.addSemanticModule( new BPMNSemanticModule() );
configuration.addSemanticModule( new BPMNDISemanticModule() );
XmlProcessReader xmlReader = new XmlProcessReader( configuration.getSemanticModules(),
getClassLoader() );
try {
process = (RuleFlowProcess) xmlReader.read( reader );
} catch ( Exception e ) {
reader.close();
throw new Exception( "Unable to read BPMN2 XML.",
e );
}
reader.close();
} catch ( Exception e ) {
return null;
}
return process;
}
public void storeAssetContent(Asset asset,
AssetItem repoAsset) throws SerializationException {
RuleFlowContentModel content = (RuleFlowContentModel) asset.getContent();
//
// Migrate v4 ruleflows to v5
// Added guards to check for nulls in the case where the ruleflows
// have not been migrated from drools 4 to 5.
//
if ( content != null ) {
if ( content.getXml() != null ) {
RuleFlowProcess process = readProcess( new ByteArrayInputStream( content.getXml().getBytes() ) );
if ( process != null ) {
RuleFlowProcessBuilder.updateProcess( process,
content.getNodes() );
XmlRuleFlowProcessDumper dumper = XmlRuleFlowProcessDumper.INSTANCE;
String out = dumper.dump( process );
repoAsset.updateContent( out );
} else {
//
// Migrate v4 ruleflows to v5
// Put the old contents back as there is no updating possible
//
repoAsset.updateContent( content.getXml() );
}
}
if ( content.getJson() != null ) {
try {
String designerURL = System.getProperty(ApplicationPreferences.DESIGNER_URL)+"/"+System.getProperty(ApplicationPreferences.DESIGNER_CONTEXT);
designerURL += "/uuidRepository?profile="+System.getProperty(ApplicationPreferences.DESIGNER_PROFILE)+"&action=toXML&pp=";
String xml = serialize( designerURL +
URLEncoder.encode( content.getPreprocessingdata(),
"UTF-8" ),
content.getJson() );
content.setXml( xml );
repoAsset.updateContent( content.getXml() );
} catch ( Exception e ) {
log.error( e.getMessage(),
e );
}
}
}
}
public static String serialize(String serializeUrl,
String modelJson) throws IOException {
OutputStream out = null;
InputStream content = null;
ByteArrayOutputStream bos = null;
try {
modelJson = "&data=" + URLEncoder.encode( modelJson,
"UTF-8" );
byte[] bytes = modelJson.getBytes( "UTF-8" );
HttpURLConnection connection = (HttpURLConnection) new URL( serializeUrl ).openConnection();
connection.setRequestMethod( "POST" );
connection.setRequestProperty( "Content-Type",
"application/x-www-form-urlencoded;charset=UTF-8" );
//connection.setFixedLengthStreamingMode( bytes.length );
connection.setDoOutput( true );
out = connection.getOutputStream();
out.write( bytes );
out.close();
content = connection.getInputStream();
bos = new ByteArrayOutputStream();
int b = 0;
while ( (b = content.read()) > -1 ) {
bos.write( b );
}
bytes = bos.toByteArray();
content.close();
bos.close();
return new String( bytes );
} finally {
try {
if ( out != null ) {
out.close();
}
if ( content != null ) {
content.close();
}
if ( bos != null ) {
bos.close();
}
} catch ( IOException e ) {
}
}
}
/**
* The rule flow can not be built if the package name is not the same as the
* package that it exists in. This changes the package name.
*
* @param item
*/
public void ruleFlowAttached(AssetItem item) {
String content = item.getContent();
if ( content != null && !content.equals( "" ) ) {
RuleFlowProcess process = readProcess( new ByteArrayInputStream( content.getBytes() ) );
if ( process != null ) {
String packageName = item.getModuleName();
String originalPackageName = process.getPackageName();
if ( !packageName.equals( originalPackageName ) ) {
process.setPackageName( packageName );
XmlBPMNProcessDumper dumper = XmlBPMNProcessDumper.INSTANCE;
String out = dumper.dump( process );
item.updateContent( out );
item.checkin( "Changed BPMN2 process package from " + originalPackageName + " to " + packageName );
}
}
}
}
public void compile(BRMSPackageBuilder builder,
AssetItem asset,
AssemblyErrorLogger logger) throws DroolsParserException,
IOException {
InputStream ins = asset.getBinaryContentAttachment();
if ( ins != null ) {
builder.addProcessFromXml( new InputStreamReader( asset.getBinaryContentAttachment() ) );
}
}
public void assembleSource(PortableObject assetContent,
StringBuilder stringBuilder) {
RuleFlowContentModel content = (RuleFlowContentModel) assetContent;
if ( content.getXml() != null && content.getXml().length() > 0 ) {
stringBuilder.append( content.getXml() );
} else if ( content.getJson() != null && content.getJson().length() > 0 ) {
// convert the json to xml
try {
String designerURL = System.getProperty(ApplicationPreferences.DESIGNER_URL)+"/"+System.getProperty(ApplicationPreferences.DESIGNER_CONTEXT);
designerURL += "/uuidRepository?profile="+System.getProperty(ApplicationPreferences.DESIGNER_PROFILE)+"&action=toXML&pp=";
String xml = BPMN2ProcessHandler.serialize( designerURL +
URLEncoder.encode( content.getPreprocessingdata(),
"UTF-8" ),
content.getJson() );
stringBuilder.append( StringEscapeUtils.escapeXml( xml ) );
} catch ( IOException e ) {
log.error( "Exception converting to xml: " + e.getMessage() );
}
} else {
//default..nothing.
}
}
private static ClassLoader getClassLoader() {
ClassLoader cl = Thread.currentThread().getContextClassLoader();
if ( cl == null ) {
cl = BPMN2ProcessHandler.class.getClassLoader();
}
return cl;
}
}