/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.cxf.bus.spring;
import java.io.IOException;
import java.net.URL;
import java.net.URLConnection;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.stream.XMLStreamException;
import org.w3c.dom.Document;
import org.xml.sax.InputSource;
import org.springframework.beans.factory.BeanDefinitionStoreException;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.xml.XmlBeanDefinitionReader;
import org.springframework.core.io.Resource;
import org.springframework.core.io.UrlResource;
import org.springframework.core.io.support.EncodedResource;
/**
* CXF reads a series of Spring XML files as part of initialization.
* The time it takes to parse them, especially if validating, builds up.
* The XML files shipped in a release in the JARs are valid and invariant.
* To speed things up, this class implements two levels of optimization.
* When a CXF distribution is fully-packaged, each of the Spring XML
* bus extension .xml files is accompanied by a FastInfoset '.fixml' file.
* These read much more rapidly. When one of those is present, this classs
* reads it instead of reading the XML text file.
*
* Absent a .fixml file, this class uses WoodStox instead of Xerces (or
* whatever the JDK is providing).
*
* The Woodstox optimization also applies to user cxf.xml or cxf-servlet.xml files
* if the user has disabled XML validation of Spring files with
* the org.apache.cxf.spring.validation.mode system property.
*
* Note that the fastInfoset optimization is only applied for the
* methods here that start from a Resource. If this is called with an InputSource,
* that optimization is not applied, since we can't reliably know the
* location of the XML.
*/
public class ControlledValidationXmlBeanDefinitionReader extends XmlBeanDefinitionReader {
/**
* Exception class used to avoid reading old FastInfoset files.
*/
private static class StaleFastinfosetException extends Exception {
}
// the following flag allows performance comparisons with and
// without fast infoset processing.
private boolean noFastinfoset;
// Spring has no 'getter' for this, so we need our own copy.
private int visibleValidationMode = VALIDATION_AUTO;
// We need a reference to the subclass.
private TunedDocumentLoader tunedDocumentLoader;
/**
* @param beanFactory
*/
public ControlledValidationXmlBeanDefinitionReader(BeanDefinitionRegistry beanFactory) {
super(beanFactory);
tunedDocumentLoader = new TunedDocumentLoader();
this.setDocumentLoader(tunedDocumentLoader);
noFastinfoset = System.getProperty("org.apache.cxf.nofastinfoset") != null
|| !TunedDocumentLoader.hasFastInfoSet();
}
@Override
protected int doLoadBeanDefinitions(InputSource inputSource,
Resource resource) throws BeanDefinitionStoreException {
// sadly, the Spring class we are extending has the critical function
// getValidationModeForResource
// marked private instead of protected, so trickery is called for here.
boolean suppressValidation = false;
try {
URL url = resource.getURL();
if (url.getFile().contains("META-INF/cxf/")) {
suppressValidation = true;
}
} catch (IOException e) {
// this space intentionally left blank.
}
int savedValidation = visibleValidationMode;
if (suppressValidation) {
setValidationMode(VALIDATION_NONE);
}
int r = super.doLoadBeanDefinitions(inputSource, resource);
setValidationMode(savedValidation);
return r;
}
@Override
public void setValidationMode(int validationMode) {
visibleValidationMode = validationMode;
super.setValidationMode(validationMode);
}
@Override
public int loadBeanDefinitions(EncodedResource encodedResource) throws BeanDefinitionStoreException {
if (!noFastinfoset) {
try {
return fastInfosetLoadBeanDefinitions(encodedResource);
} catch (BeanDefinitionStoreException bdse) {
throw bdse;
} catch (Throwable e) {
//ignore - just call the super to load them
}
}
return super.loadBeanDefinitions(encodedResource);
}
private int fastInfosetLoadBeanDefinitions(EncodedResource encodedResource)
throws IOException, StaleFastinfosetException,
ParserConfigurationException, XMLStreamException {
URL resUrl = encodedResource.getResource().getURL();
// There are XML files scampering around that don't end in .xml.
// We don't apply the optimization to them.
if (!resUrl.getPath().endsWith(".xml")) {
throw new StaleFastinfosetException();
}
String fixmlPath = resUrl.getPath().replaceFirst("\\.xml$", ".fixml");
String protocol = resUrl.getProtocol();
// beware of the relative URL rules for jar:, which are surprising.
if ("jar".equals(protocol)) {
fixmlPath = fixmlPath.replaceFirst("^.*!", "");
}
URL fixmlUrl = new URL(resUrl, fixmlPath);
// if we are in unpacked files, we take some extra time
// to ensure that we aren't using a stale Fastinfoset file.
if ("file".equals(protocol)) {
URLConnection resCon = null;
URLConnection fixCon = null;
resCon = resUrl.openConnection();
fixCon = fixmlUrl.openConnection();
if (resCon.getLastModified() > fixCon.getLastModified()) {
throw new StaleFastinfosetException();
}
}
Resource newResource = new UrlResource(fixmlUrl);
Document doc = TunedDocumentLoader.loadFastinfosetDocument(fixmlUrl);
if (doc == null) {
//something caused FastinfoSet to not be able to read the doc
throw new StaleFastinfosetException();
}
return registerBeanDefinitions(doc, newResource);
}
}