package org.drools.compiler.kie.builder.impl;
import org.drools.compiler.kie.builder.impl.event.KieModuleDiscovered;
import org.drools.compiler.kie.builder.impl.event.KieServicesEventListerner;
import org.drools.core.util.IoUtils;
import org.drools.core.util.StringUtils;
import org.drools.compiler.kproject.ReleaseIdImpl;
import org.drools.compiler.kproject.models.KieModuleModelImpl;
import org.drools.compiler.kproject.xml.PomModel;
import org.kie.api.KieServices;
import org.kie.api.builder.ReleaseId;
import org.kie.api.builder.model.KieModuleModel;
import org.kie.api.builder.KieRepository;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.UnsupportedEncodingException;
import java.lang.ref.WeakReference;
import java.lang.reflect.Method;
import java.net.URL;
import java.net.URLDecoder;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import static org.drools.compiler.kie.builder.impl.KieBuilderImpl.setDefaultsforEmptyKieModule;
import static org.drools.core.common.ProjectClassLoader.createProjectClassLoader;
/**
* Discovers all KieModules on the classpath, via the kmodule.xml file.
* KieBaseModels and KieSessionModels are then indexed, with helper lookups
* Each resulting KieModule is added to the KieRepository
*
*/
public class ClasspathKieProject extends AbstractKieProject {
private static final Logger log = LoggerFactory.getLogger( ClasspathKieProject.class );
public static final String OSGI_KIE_MODULE_CLASS_NAME = "org.drools.osgi.compiler.OsgiKieModule";
private Map<ReleaseId, InternalKieModule> kieModules = new HashMap<ReleaseId, InternalKieModule>();
private Map<String, InternalKieModule> kJarFromKBaseName = new HashMap<String, InternalKieModule>();
private final KieRepository kieRepository;
private final ClassLoader parentCL;
private ClassLoader classLoader;
private final WeakReference<KieServicesEventListerner> listener;
ClasspathKieProject(ClassLoader parentCL, WeakReference<KieServicesEventListerner> listener) {
this.kieRepository = KieServices.Factory.get().getRepository();
this.listener = listener;
this.parentCL = parentCL;
}
public void init() {
this.classLoader = createProjectClassLoader(parentCL);
discoverKieModules();
indexParts(kieModules.values(), kJarFromKBaseName);
}
public ReleaseId getGAV() {
return null;
}
public long getCreationTimestamp() {
return 0L;
}
public void discoverKieModules() {
String[] configFiles = {KieModuleModelImpl.KMODULE_JAR_PATH, KieModuleModelImpl.KMODULE_SPRING_JAR_PATH};
for ( String configFile : configFiles) {
final Enumeration<URL> e;
try {
e = classLoader.getResources(configFile );
} catch ( IOException exc ) {
log.error( "Unable to find and build index of "+configFile+"." + exc.getMessage() );
return;
}
// Map of kmodule urls
while ( e.hasMoreElements() ) {
URL url = e.nextElement();
notifyKieModuleFound(url);
try {
InternalKieModule kModule = fetchKModule(url);
if (kModule != null) {
ReleaseId releaseId = kModule.getReleaseId();
kieModules.put(releaseId, kModule);
log.debug( "Discovered classpath module " + releaseId.toExternalForm() );
kieRepository.addKieModule(kModule);
}
} catch ( Exception exc ) {
log.error( "Unable to build index of kmodule.xml url=" + url.toExternalForm() + "\n" + exc.getMessage() );
}
}
}
}
private void notifyKieModuleFound(URL url) {
log.info( "Found kmodule: " + url);
if (listener != null && listener.get() != null) {
listener.get().onKieModuleDiscovered(new KieModuleDiscovered(url.toString()));
}
}
public static InternalKieModule fetchKModule(URL url) {
if (url.toString().startsWith("bundle:")) {
return fetchOsgiKModule(url);
}
return fetchKModule(url, fixURLFromKProjectPath(url));
}
private static InternalKieModule fetchOsgiKModule(URL url) {
Method m;
try {
Class<?> c = Class.forName(OSGI_KIE_MODULE_CLASS_NAME);
m = c.getMethod("create", URL.class);
} catch (Exception e) {
log.error("It is necessary to have the drools-osgi-integration module on the path in order to create a KieProject from an ogsi bundle", e);
throw new RuntimeException(e);
}
try {
return (InternalKieModule) m.invoke(null, url);
} catch (Exception e) {
log.error("Failure creating a OsgiKieModule caused by: " + e.getMessage(), e);
throw new RuntimeException(e);
}
}
private static void fetchKModuleFromSpring(URL kModuleUrl, String fixedURL){
try{
Class clazz = Class.forName("org.kie.spring.KModuleSpringMarshaller");
Method method = clazz.getDeclaredMethod("fromXML", java.net.URL.class, String.class);
method.invoke(null, kModuleUrl, fixedURL);
} catch (Exception e) {
log.error("It is necessary to have the kie-spring module on the path in order to create a KieProject from a spring context", e);
throw new RuntimeException(e);
}
}
private static InternalKieModule fetchKModule(URL url, String fixedURL) {
if ( url.getPath().endsWith("-spring.xml")) {
// the entire kmodule creation is happening in the kie-spring module,
// hence we force a null return
fetchKModuleFromSpring(url, fixedURL);
return null;
}
KieModuleModel kieProject = KieModuleModelImpl.fromXML( url );
setDefaultsforEmptyKieModule(kieProject);
String pomProperties = getPomProperties( fixedURL );
if (pomProperties == null) {
log.warn("Cannot find maven pom properties for this project. Using the container's default ReleaseId");
}
ReleaseId releaseId = pomProperties != null ?
ReleaseIdImpl.fromPropertiesString(pomProperties) :
KieServices.Factory.get().getRepository().getDefaultReleaseId();
String rootPath = fixedURL;
if ( rootPath.lastIndexOf( ':' ) > 0 ) {
rootPath = IoUtils.asSystemSpecificPath( rootPath, rootPath.lastIndexOf( ':') );
}
return createInternalKieModule(url, fixedURL, kieProject, releaseId, rootPath);
}
public static InternalKieModule createInternalKieModule(URL url, String fixedURL, KieModuleModel kieProject, ReleaseId releaseId, String rootPath) {
File file = new File( rootPath );
return file.isDirectory() ?
new FileKieModule( releaseId, kieProject, file ) :
new ZipKieModule( releaseId, kieProject, file );
}
public static String getPomProperties(String urlPathToAdd) {
String pomProperties = null;
String rootPath = urlPathToAdd;
if ( rootPath.lastIndexOf( ':' ) > 0 ) {
rootPath = IoUtils.asSystemSpecificPath( rootPath, rootPath.lastIndexOf( ':' ) );
}
if ( urlPathToAdd.endsWith( ".jar" ) || urlPathToAdd.endsWith( "/content" ) ) {
pomProperties = getPomPropertiesFromZipFile(rootPath);
} else {
pomProperties = getPomPropertiesFromFileSystem(rootPath);
if (pomProperties == null) {
int webInf = rootPath.indexOf("/WEB-INF");
if (webInf > 0) {
rootPath = rootPath.substring(0, webInf);
pomProperties = getPomPropertiesFromFileSystem(rootPath);
}
}
if (pomProperties == null) {
pomProperties = generatePomPropertiesFromPom(rootPath);
}
}
if (pomProperties == null) {
log.warn( "Unable to load pom.properties from" + urlPathToAdd );
}
return pomProperties;
}
private static String getPomPropertiesFromZipFile(String rootPath) {
File actualZipFile = new File( rootPath );
if ( !actualZipFile.exists() ) {
log.error( "Unable to load pom.properties from" + rootPath + " as jarPath cannot be found\n" + rootPath );
}
ZipFile zipFile = null;
try {
zipFile = new ZipFile( actualZipFile );
String file = KieBuilderImpl.findPomProperties( zipFile );
if ( file == null ) {
log.warn( "Unable to find pom.properties in " + rootPath );
return null;
}
ZipEntry zipEntry = zipFile.getEntry( file );
String pomProps = StringUtils.readFileAsString(
new InputStreamReader( zipFile.getInputStream( zipEntry ), IoUtils.UTF8_CHARSET ) );
log.debug( "Found and used pom.properties " + file);
return pomProps;
} catch ( Exception e ) {
log.error( "Unable to load pom.properties from " + rootPath + "\n" + e.getMessage() );
} finally {
try {
zipFile.close();
} catch ( IOException e ) {
log.error( "Error when closing InputStream to " + rootPath + "\n" + e.getMessage() );
}
}
return null;
}
private static String getPomPropertiesFromFileSystem(String rootPath) {
Reader reader = null;
try {
File file = KieBuilderImpl.findPomProperties( new File( rootPath ) );
if ( file == null ) {
log.warn( "Unable to find pom.properties in " + rootPath );
return null;
}
reader = new InputStreamReader( new FileInputStream( file ), IoUtils.UTF8_CHARSET );
log.debug( "Found and used pom.properties " + file);
return StringUtils.toString( reader );
} catch ( Exception e ) {
log.warn( "Unable to load pom.properties tried recursing down from " + rootPath + "\n" + e.getMessage() );
} finally {
if ( reader != null ) {
try {
reader.close();
} catch ( IOException e ) {
log.error( "Error when closing InputStream to " + rootPath + "\n" + e.getMessage() );
}
}
}
return null;
}
private static String generatePomPropertiesFromPom(String rootPath) {
// recurse until we reach root or find a pom.xml
File file = null;
for ( File folder = new File( rootPath ); folder.getParent() != null; folder = new File( folder.getParent() ) ) {
file = new File( folder, "pom.xml" );
if ( file.exists() ) {
break;
}
file = null;
}
if ( file != null ) {
FileInputStream fis = null;
try {
fis = new FileInputStream( file ) ;
PomModel pomModel = PomModel.Parser.parse( rootPath + "/pom.xml", fis);
KieBuilderImpl.validatePomModel( pomModel ); // throws an exception if invalid
ReleaseIdImpl gav = (ReleaseIdImpl) pomModel.getReleaseId();
String str = KieBuilderImpl.generatePomProperties( gav );
log.info( "Recursed up folders, found and used pom.xml " + file );
return str;
} catch ( Exception e ) {
log.error( "As folder project tried to fall back to pom.xml " + file + "\nbut failed with exception:\n" + e.getMessage() );
} finally {
if ( fis != null ) {
try {
fis.close();
} catch ( IOException e ) {
log.error( "Error when closing InputStream to " + file + "\n" + e.getMessage() );
}
}
}
} else {
log.warn( "As folder project tried to fall back to pom.xml, but could not find one for " + file );
}
return null;
}
public static String fixURLFromKProjectPath(URL url) {
String urlPath = url.toExternalForm();
// determine resource type (eg: jar, file, bundle)
String urlType = "file";
int colonIndex = urlPath.indexOf( ":" );
if ( colonIndex != -1 ) {
urlType = urlPath.substring( 0,
colonIndex );
}
urlPath = url.getPath();
if ( "jar".equals( urlType ) ) {
// switch to using getPath() instead of toExternalForm()
if ( urlPath.indexOf( '!' ) > 0 ) {
urlPath = urlPath.substring( 0,
urlPath.indexOf( '!' ) );
}
} else if ( "vfs".equals( urlType ) ) {
urlPath = getPathForVFS(url);
} else {
if (url.toString().contains("-spring.xml")){
urlPath = urlPath.substring( 0, urlPath.length() - ("/" + KieModuleModelImpl.KMODULE_SPRING_JAR_PATH).length() );
} else {
urlPath = urlPath.substring( 0,
urlPath.length() - ("/" + KieModuleModelImpl.KMODULE_JAR_PATH).length() );
}
}
if (urlPath.endsWith(".jar!")) {
urlPath = urlPath.substring( 0, urlPath.length() - 1 );
}
// remove any remaining protocols, normally only if it was a jar
int firstSlash = urlPath.indexOf( '/' );
colonIndex = firstSlash > 0 ? urlPath.lastIndexOf( ":", firstSlash ) : urlPath.lastIndexOf( ":" );
if ( colonIndex >= 0 ) {
urlPath = IoUtils.asSystemSpecificPath(urlPath, colonIndex);
}
try {
urlPath = URLDecoder.decode( urlPath,
"UTF-8" );
} catch ( UnsupportedEncodingException e ) {
throw new IllegalArgumentException( "Error decoding URL (" + url + ") using UTF-8",
e );
}
log.debug("KieModule URL type=" + urlType + " url=" + urlPath);
return urlPath;
}
private static String getPathForVFS(URL url) {
String urlString = url.toString();
int kModulePos = urlString.length() - ("/" + KieModuleModelImpl.KMODULE_JAR_PATH).length();
boolean isInJar = urlString.substring(kModulePos - 4, kModulePos).equals(".jar");
try {
Method m = Class.forName("org.jboss.vfs.VirtualFile").getMethod("getPhysicalFile");
Object content = url.openConnection().getContent();
File f = (File)m.invoke(content);
String path = f.getPath();
if (isInJar && path.contains("contents" + File.separator)) {
String jarName = urlString.substring(0, kModulePos);
jarName = jarName.substring(jarName.lastIndexOf('/')+1);
String jarFolderPath = path.substring( 0, path.length() - ("contents/" + KieModuleModelImpl.KMODULE_JAR_PATH).length() );
String jarPath = jarFolderPath + jarName;
path = new File(jarPath).exists() ? jarPath : jarFolderPath + "content";
} else if (path.endsWith(File.separator + KieModuleModelImpl.KMODULE_FILE_NAME)) {
path = path.substring( 0, path.length() - ("/" + KieModuleModelImpl.KMODULE_JAR_PATH).length() );
}
log.info( "Virtual file physical path = " + path );
return path;
} catch (Exception e) {
log.error( "Error when reading virtual file from " + url.toString(), e );
}
return url.getPath();
}
public InternalKieModule getKieModuleForKBase(String kBaseName) {
return this.kJarFromKBaseName.get( kBaseName );
}
public ClassLoader getClassLoader() {
return this.classLoader;
}
public ClassLoader getClonedClassLoader() {
return createProjectClassLoader(classLoader.getParent());
}
}