SamplePersistenceBase.java
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package io.wcm.qa.glnm.persistence;
import java.util.NoSuchElementException;
import org.apache.commons.configuration2.PropertiesConfiguration;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import io.wcm.qa.glnm.differences.base.Differences;
import io.wcm.qa.glnm.differences.generic.MutableDifferences;
abstract class SamplePersistenceBase<T> implements SamplePersistence<T> {
private static final Logger LOG = LoggerFactory.getLogger(SamplePersistenceBase.class);
private Class resourceClass;
/** {@inheritDoc} */
@Override
public T loadFromBaseline(Differences key) {
try {
if (LOG.isTraceEnabled()) {
LOG.trace("loading for " + resourceClass + " with key " + key.getKey());
}
return fetchBaseline(keyWithContextDifferences(key));
}
catch (NoSuchElementException ex) {
return handleNotFound();
}
}
/** {@inheritDoc} */
@Override
public void storeToBaseline(Differences key, T sample) {
samples().setProperty(keyWithContextDifferences(key), sample);
}
private Class initResourceClass() {
Class contextResourceClass = BaselinePersistenceExtension.getContextResourceClass();
if (contextResourceClass != null) {
return contextResourceClass;
}
return getClass();
}
protected PropertiesConfiguration baseline() {
return PersistingCacheUtil.cachedBaselineForProperties(getResourceClass());
}
protected Class getResourceClass() {
if (resourceClass == null) {
resourceClass = initResourceClass();
}
return resourceClass;
}
protected T handleNotFound() {
return null;
}
protected String keyWithContextDifferences(Differences key) {
MutableDifferences differences = new MutableDifferences();
Differences contextDifferences = BaselinePersistenceExtension.getContextDifferences();
if (contextDifferences != null) {
differences.addAll(contextDifferences);
}
differences.addAll(key);
return differences.getKey();
}
protected abstract T fetchBaseline(String keyWithContextDifferences);
protected PropertiesConfiguration samples() {
return PersistingCacheUtil.cachedSamplesForProperties(getResourceClass());
}
protected void setResourceClass(Class resourceClass) {
this.resourceClass = resourceClass;
}
}