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Posted to dev@ofbiz.apache.org by Adrian Crum <ad...@sandglass-software.com> on 2015/04/30 14:32:42 UTC
Re: svn commit: r1676970 - /ofbiz/trunk/framework/base/src/org/ofbiz/base/component/ComponentLoaderConfig.java
Hmmm... this seems to have a caused a problem with the load-demo ant
target. I am looking into it.
Adrian Crum
Sandglass Software
www.sandglass-software.com
On 4/30/2015 1:12 PM, adrianc@apache.org wrote:
> Author: adrianc
> Date: Thu Apr 30 12:12:17 2015
> New Revision: 1676970
>
> URL: http://svn.apache.org/r1676970
> Log:
> Some work on ComponentLoaderConfig.java:
>
> 1. Thread safety
> 2. Optimization
> 3. Code cleanup
> 4. Improved error handling
>
> Modified:
> ofbiz/trunk/framework/base/src/org/ofbiz/base/component/ComponentLoaderConfig.java
>
> Modified: ofbiz/trunk/framework/base/src/org/ofbiz/base/component/ComponentLoaderConfig.java
> URL: http://svn.apache.org/viewvc/ofbiz/trunk/framework/base/src/org/ofbiz/base/component/ComponentLoaderConfig.java?rev=1676970&r1=1676969&r2=1676970&view=diff
> ==============================================================================
> --- ofbiz/trunk/framework/base/src/org/ofbiz/base/component/ComponentLoaderConfig.java (original)
> +++ ofbiz/trunk/framework/base/src/org/ofbiz/base/component/ComponentLoaderConfig.java Thu Apr 30 12:12:17 2015
> @@ -20,15 +20,15 @@ package org.ofbiz.base.component;
>
> import java.io.IOException;
> import java.net.URL;
> -import java.util.LinkedList;
> +import java.util.ArrayList;
> import java.util.List;
> -import java.util.Properties;
> +import java.util.Map;
> +import java.util.concurrent.atomic.AtomicReference;
>
> import javax.xml.parsers.ParserConfigurationException;
>
> import org.ofbiz.base.util.UtilGenerics;
> import org.ofbiz.base.util.UtilURL;
> -import org.ofbiz.base.util.UtilValidate;
> import org.ofbiz.base.util.UtilXml;
> import org.ofbiz.base.util.string.FlexibleStringExpander;
> import org.w3c.dom.Document;
> @@ -43,33 +43,31 @@ public class ComponentLoaderConfig {
>
> public static final String module = ComponentLoaderConfig.class.getName();
> public static final String COMPONENT_LOAD_XML_FILENAME = "component-load.xml";
> -
> public static final int SINGLE_COMPONENT = 0;
> public static final int COMPONENT_DIRECTORY = 1;
> -
> - protected static List<ComponentDef> componentsToLoad = null;
> + private static final AtomicReference<List<ComponentDef>> componentDefsRef = new AtomicReference<List<ComponentDef>>(null);
>
> public static List<ComponentDef> getRootComponents(String configFile) throws ComponentException {
> - if (componentsToLoad == null) {
> - synchronized (ComponentLoaderConfig.class) {
> - if (componentsToLoad == null) {
> - if (configFile == null) {
> - configFile = COMPONENT_LOAD_XML_FILENAME;
> - }
> - URL xmlUrl = UtilURL.fromResource(configFile);
> - ComponentLoaderConfig.componentsToLoad = ComponentLoaderConfig.getComponentsFromConfig(xmlUrl);
> - }
> + List<ComponentDef> existingInstance = componentDefsRef.get();
> + if (existingInstance == null) {
> + if (configFile == null) {
> + configFile = COMPONENT_LOAD_XML_FILENAME;
> + }
> + URL xmlUrl = UtilURL.fromResource(configFile);
> + List<ComponentDef> newInstance = getComponentsFromConfig(xmlUrl);
> + if (componentDefsRef.compareAndSet(existingInstance, newInstance)) {
> + existingInstance = newInstance;
> + } else {
> + existingInstance = componentDefsRef.get();
> }
> }
> - return componentsToLoad;
> + return existingInstance;
> }
>
> public static List<ComponentDef> getComponentsFromConfig(URL configUrl) throws ComponentException {
> if (configUrl == null) {
> - throw new ComponentException("Component config file does not exist: " + configUrl);
> + throw new IllegalArgumentException("configUrl cannot be null");
> }
> -
> - List<ComponentDef> componentsFromConfig = null;
> Document document = null;
> try {
> document = UtilXml.readXmlDocument(configUrl, true);
> @@ -80,13 +78,27 @@ public class ComponentLoaderConfig {
> } catch (IOException e) {
> throw new ComponentException("Error reading the component config file: " + configUrl, e);
> }
> -
> Element root = document.getDocumentElement();
> List<? extends Element> toLoad = UtilXml.childElementList(root);
> - if (UtilValidate.isNotEmpty(toLoad)) {
> - componentsFromConfig = new LinkedList<ComponentDef>();
> - for (Element element: toLoad) {
> - componentsFromConfig.add(new ComponentDef(element));
> + List<ComponentDef> componentsFromConfig = null;
> + if (!toLoad.isEmpty()) {
> + componentsFromConfig = new ArrayList<ComponentDef>(toLoad.size());
> + Map<String, ? extends Object> systemProps = UtilGenerics.<String, Object> checkMap(System.getProperties());
> + for (Element element : toLoad) {
> + String nodeName = element.getNodeName();
> + String name = null;
> + String location = null;
> + int type = SINGLE_COMPONENT;
> + if ("load-component".equals(nodeName)) {
> + name = element.getAttribute("component-name");
> + location = FlexibleStringExpander.expandString(element.getAttribute("component-location"), systemProps);
> + } else if ("load-components".equals(nodeName)) {
> + location = FlexibleStringExpander.expandString(element.getAttribute("parent-directory"), systemProps);
> + type = COMPONENT_DIRECTORY;
> + } else {
> + throw new ComponentException("Invalid element '" + nodeName + "' found in component config file " + configUrl);
> + }
> + componentsFromConfig.add(new ComponentDef(name, location, type));
> }
> }
> return componentsFromConfig;
> @@ -94,20 +106,13 @@ public class ComponentLoaderConfig {
>
> public static class ComponentDef {
> public String name;
> - public String location;
> - public int type = -1;
> + public final String location;
> + public final int type;
>
> - public ComponentDef(Element element) {
> - Properties systemProps = System.getProperties();
> - if ("load-component".equals(element.getNodeName())) {
> - name = element.getAttribute("component-name");
> - location = FlexibleStringExpander.expandString(element.getAttribute("component-location"), UtilGenerics.<String, Object>checkMap(systemProps));
> - type = SINGLE_COMPONENT;
> - } else if ("load-components".equals(element.getNodeName())) {
> - name = null;
> - location = FlexibleStringExpander.expandString(element.getAttribute("parent-directory"), UtilGenerics.<String, Object>checkMap(systemProps));
> - type = COMPONENT_DIRECTORY;
> - }
> + private ComponentDef(String name, String location, int type) {
> + this.name = name;
> + this.location = location;
> + this.type = type;
> }
> }
> }
>
>