org.springframework.boot.devtools.autoconfigure.ConditionEvaluationDeltaLoggingListener Maven / Gradle / Ivy
/*
* Copyright 2012-2017 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.boot.devtools.autoconfigure;
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.ApplicationListener;
/**
* An {@link ApplicationListener} that logs the delta of condition evaluation across
* restarts.
*
* @author Andy Wilkinson
*/
class ConditionEvaluationDeltaLoggingListener
implements ApplicationListener {
private final Log logger = LogFactory.getLog(getClass());
private static ConditionEvaluationReport previousReport;
@Override
public void onApplicationEvent(ApplicationReadyEvent event) {
ConditionEvaluationReport report = event.getApplicationContext()
.getBean(ConditionEvaluationReport.class);
if (previousReport != null) {
ConditionEvaluationReport delta = report.getDelta(previousReport);
if (!delta.getConditionAndOutcomesBySource().isEmpty()
|| !delta.getExclusions().isEmpty()
|| !delta.getUnconditionalClasses().isEmpty()) {
if (this.logger.isInfoEnabled()) {
this.logger.info("Condition evaluation delta:"
+ new ConditionEvaluationReportMessage(delta,
"CONDITION EVALUATION DELTA"));
}
}
else {
this.logger.info("Condition evaluation unchanged");
}
}
previousReport = report;
}
}