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NIHVIVO-3628 Clean up the logic that instantiates the postprocessor. Log a more specific error message if there is a problem.

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This commit is contained in:
j2blake 2012-02-22 20:29:50 +00:00
parent 28c06329f7
commit 1f96d551f5
2 changed files with 56 additions and 45 deletions
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67
webapp/src/edu/cornell/mannlib/vitro/webapp/web/templatemodels/individual/ObjectPropertyTemplateModel.java
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@ -338,9 +338,9 @@ public abstract class ObjectPropertyTemplateModel extends PropertyTemplateModel
/* NB The default post-processor is not the same as the post-processor for the default view. The latter
* actually defines its own post-processor, whereas the default post-processor is used for custom views
* that don't define a post-processor, to ensure that the standard post-processing applies.
*
* edu.cornell.mannlib.vitro.webapp.web.templatemodels.individual.DefaultObjectPropertyDataPostProcessor
*/
private static final String DEFAULT_POSTPROCESSOR =
"edu.cornell.mannlib.vitro.webapp.web.templatemodels.individual.DefaultObjectPropertyDataPostProcessor";
private boolean isDefaultConfig;
private Set<String> constructQueries;
@ -440,35 +440,50 @@ public abstract class ObjectPropertyTemplateModel extends PropertyTemplateModel
constructQueries = configFileContents.getConstructQueries();
String postprocessorName = configFileContents.getPostprocessorName();
if (StringUtils.isBlank(postprocessorName)) {
log.debug("No postprocessor specified for property "
+ propertyUri + ". Using default postprocessor.");
postprocessorName = DEFAULT_POSTPROCESSOR;
}
try {
getPostProcessor(postprocessorName, wdf);
} catch (Exception e) {
if (!postprocessorName.equals(DEFAULT_POSTPROCESSOR)) {
log.debug("Cannot find postprocessor specified for property "
+ propertyUri
+ ". Using default postprocessor.");
postprocessorName = DEFAULT_POSTPROCESSOR;
getPostProcessor(postprocessorName, wdf);
}
}
postprocessor = getPostProcessor(postprocessorName, ObjectPropertyTemplateModel.this, wdf, configFilePath);
} catch (Exception e) {
log.error("Error processing config file " + configFilePath, e);
}
}
private void getPostProcessor(String name, WebappDaoFactory wdf) throws Exception {
Class<?> postprocessorClass = Class.forName(name);
Constructor<?> constructor = postprocessorClass.getConstructor(ObjectPropertyTemplateModel.class, WebappDaoFactory.class);
postprocessor = (ObjectPropertyDataPostProcessor) constructor.newInstance(ObjectPropertyTemplateModel.this, wdf);
}
private ObjectPropertyDataPostProcessor getPostProcessor(
String className,
ObjectPropertyTemplateModel optm,
WebappDaoFactory wdf, String configFilePath) {
try {
if (StringUtils.isBlank(className)) {
return new DefaultObjectPropertyDataPostProcessor(optm, wdf);
}
Class<?> clazz = Class.forName(className);
Constructor<?> constructor = clazz.getConstructor(ObjectPropertyTemplateModel.class, WebappDaoFactory.class);
return (ObjectPropertyDataPostProcessor) constructor.newInstance(optm, wdf);
} catch (ClassNotFoundException e) {
log.error("Error processing config file '" + configFilePath
+ "': can't load postprocessor class '" + className
+ "'. " + "Using default postprocessor.", e);
return new DefaultObjectPropertyDataPostProcessor(optm, wdf);
} catch (NoSuchMethodException e) {
log.error("Error processing config file '" + configFilePath
+ "': postprocessor class '" + className
+ "' does not have a constructor that takes "
+ "ObjectPropertyTemplateModel and WebappDaoFactory. "
+ "Using default postprocessor.", e);
return new DefaultObjectPropertyDataPostProcessor(optm, wdf);
} catch (ClassCastException e) {
log.error("Error processing config file '" + configFilePath
+ "': postprocessor class '" + className + "' does "
+ "not implement ObjectPropertyDataPostProcessor. "
+ "Using default postprocessor.", e);
return new DefaultObjectPropertyDataPostProcessor(optm, wdf);
} catch (Exception e) {
log.error("Error processing config file '" + configFilePath
+ "': can't create postprocessor instance of class '"
+ className + "'. " + "Using default postprocessor.", e);
return new DefaultObjectPropertyDataPostProcessor(optm, wdf);
}
}
private String getConfigFilePath(String filename) {
return servletContext.getRealPath(CONFIG_FILE_PATH + filename);
}