package org.springframework.boot.devtools.autoconfigure;
import java.util.concurrent.ConcurrentHashMap;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.boot.autoconfigure.condition.ConditionEvaluationReport;
import org.springframework.boot.autoconfigure.logging.ConditionEvaluationReportMessage;
import org.springframework.boot.context.event.ApplicationReadyEvent;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.ApplicationListener;
class ConditionEvaluationDeltaLoggingListener
implements ApplicationListener<ApplicationReadyEvent>, ApplicationContextAware {
private static final ConcurrentHashMap<String, ConditionEvaluationReport> previousReports = new ConcurrentHashMap<>();
private static final Log logger = LogFactory.getLog(ConditionEvaluationDeltaLoggingListener.class);
private volatile ApplicationContext context;
@Override
public void onApplicationEvent(ApplicationReadyEvent event) {
if (!event.getApplicationContext().equals(this.context)) {
return;
}
ConditionEvaluationReport report = event.getApplicationContext().getBean(ConditionEvaluationReport.class);
ConditionEvaluationReport previousReport = previousReports.get(event.getApplicationContext().getId());
if (previousReport != null) {
ConditionEvaluationReport delta = report.getDelta(previousReport);
if (!delta.getConditionAndOutcomesBySource().isEmpty() || !delta.getExclusions().isEmpty()
|| !delta.getUnconditionalClasses().isEmpty()) {
if (logger.isInfoEnabled()) {
logger.info("Condition evaluation delta:"
+ new ConditionEvaluationReportMessage(delta, "CONDITION EVALUATION DELTA"));
}
}
else {
logger.info("Condition evaluation unchanged");
}
}
previousReports.put(event.getApplicationContext().getId(), report);
}
@Override
public void setApplicationContext(ApplicationContext applicationContext) {
this.context = applicationContext;
}
}