package org.apereo.cas.support.events.listener;
import org.apache.commons.lang3.ObjectUtils;
import org.apereo.cas.configuration.CasConfigurationPropertiesEnvironmentManager;
import org.apereo.cas.support.events.config.CasConfigurationModifiedEvent;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.context.properties.ConfigurationPropertiesBindingPostProcessor;
import org.springframework.cloud.context.environment.EnvironmentChangeEvent;
import org.springframework.cloud.context.refresh.ContextRefresher;
import org.springframework.context.event.EventListener;
import java.util.Collection;
import java.util.Collections;
/**
* This is {@link CasConfigurationEventListener}.
*
* @author Misagh Moayyed
* @since 5.1.0
*/
public class CasConfigurationEventListener {
private static final Logger LOGGER = LoggerFactory.getLogger(CasConfigurationEventListener.class);
@Autowired
private ConfigurationPropertiesBindingPostProcessor binder;
@Autowired(required = false)
private ContextRefresher contextRefresher;
private final CasConfigurationPropertiesEnvironmentManager configurationPropertiesEnvironmentManager;
public CasConfigurationEventListener(final CasConfigurationPropertiesEnvironmentManager configurationPropertiesEnvironmentManager) {
this.configurationPropertiesEnvironmentManager = configurationPropertiesEnvironmentManager;
}
/**
* Handle refresh event when issued to this CAS server locally.
*
* @param event the event
*/
@EventListener
public void handleRefreshEvent(final EnvironmentChangeEvent event) {
LOGGER.debug("Received event [{}]", event);
rebind();
}
/**
* Handle configuration modified event.
*
* @param event the event
*/
@EventListener
public void handleConfigurationModifiedEvent(final CasConfigurationModifiedEvent event) {
if (this.contextRefresher == null) {
LOGGER.warn("Unable to refresh application context, since no refresher is available");
return;
}
if (event.isEligibleForContextRefresh()) {
LOGGER.info("Received event [{}]. Refreshing CAS configuration...", event);
Collection<String> keys = null;
try {
keys = this.contextRefresher.refresh();
LOGGER.debug("Refreshed the following settings: [{}].", keys);
} catch (final Throwable e) {
LOGGER.trace(e.getMessage(), e);
} finally {
rebind();
LOGGER.info("CAS finished rebinding configuration with new settings [{}]",
ObjectUtils.defaultIfNull(keys, Collections.emptyList()));
}
}
}
private void rebind() {
LOGGER.info("Refreshing CAS configuration. Stand by...");
if (configurationPropertiesEnvironmentManager != null) {
configurationPropertiesEnvironmentManager.rebindCasConfigurationProperties();
} else {
CasConfigurationPropertiesEnvironmentManager.rebindCasConfigurationProperties(this.binder);
}
}
}