关于ofbiz-component.xml文件中的resource-loader
寻找文件的方式最后是通过ComponentConfig.java的getURL方法来解析的
public URL getURL(String resourceLoaderName, String location) throws ComponentException {
ResourceLoaderInfo resourceLoaderInfo = resourceLoaderInfos.get(resourceLoaderName);
if (resourceLoaderInfo == null) {
throw new ComponentException("Could not find resource-loader named: " + resourceLoaderName);
}
if ("component".equals(resourceLoaderInfo.type) || "file".equals(resourceLoaderInfo.type)) {
//如果是<resource-loader name="main" type="component" />
String fullLocation = getFullLocation(resourceLoaderName, location);
URL fileUrl = UtilURL.fromFilename(fullLocation);
if (fileUrl == null) {
throw new ComponentException("File Resource not found: " + fullLocation);
}
return fileUrl;
} else if ("classpath".equals(resourceLoaderInfo.type)) {
String fullLocation = getFullLocation(resourceLoaderName, location);
URL url = UtilURL.fromResource(fullLocation);
if (url == null) {
throw new ComponentException("Classpath Resource not found: " + fullLocation);
}
return url;
} else if ("url".equals(resourceLoaderInfo.type)) {
String fullLocation = getFullLocation(resourceLoaderName, location);
URL url = null;
try {
url = FlexibleLocation.resolveLocation(location);
} catch (java.net.MalformedURLException e) {
throw new ComponentException("Error with malformed URL while trying to load URL resource at location [" + fullLocation + "]", e);
}
if (url == null) {
throw new ComponentException("URL Resource not found: " + fullLocation);
}
return url;
} else {
throw new ComponentException("The resource-loader type is not recognized: " + resourceLoaderInfo.type);
}
}
其中主要是看
就是用getFullLocation(resourceLoaderName, location);方法
它做的事是判断如果类型是component，就进行rootLocation+location。而rootLocation就是组建所在路径，而location就是我们的entity-resource或者service-resource等等设置的location。
另外这个方法还有几个操作，判断是否要使用prependEnv，如果使用，会添加上prependEnv
if (UtilValidate.isNotEmpty(resourceLoaderInfo.prependEnv)) {
String propValue = System.getProperty(resourceLoaderInfo.prependEnv);
if (propValue == null) {
String errMsg = "The Java environment (-Dxxx=yyy) variable with name " + resourceLoaderInfo.prependEnv + " is not set, cannot load resource.";
Debug.logError(errMsg, module);
throw new IllegalArgumentException(errMsg);
}
buf.append(propValue);
}
//判断是否要添加prefix
if (UtilValidate.isNotEmpty(resourceLoaderInfo.prefix)) {
buf.append(resourceLoaderInfo.prefix);
}
由此可以得出，resource-loader元素的完整配置是
<resource-loader name="main" type="component" prepend-env="" prefix=""/>
