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Cassandra support for Spring Data
/*
* Copyright 2018-2022 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
*
* https://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.data.cassandra.core.mapping.event;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.context.ApplicationListener;
import org.springframework.core.GenericTypeResolver;
/**
* Base class to implement domain specific {@link ApplicationListener}s for {@link CassandraMappingEvent}.
*
* @author Lukasz Antoniak
* @author Mark Paluch
* @since 2.1
*/
public abstract class AbstractCassandraEventListener implements ApplicationListener> {
protected static final Log log = LogFactory.getLog(AbstractCassandraEventListener.class);
private final Class domainClass;
/**
* Creates a new {@link AbstractCassandraEventListener}.
*/
public AbstractCassandraEventListener() {
Class typeArgument = GenericTypeResolver.resolveTypeArgument(getClass(), AbstractCassandraEventListener.class);
this.domainClass = typeArgument == null ? Object.class : typeArgument;
}
@SuppressWarnings({ "unchecked" })
@Override
public void onApplicationEvent(CassandraMappingEvent event) {
Object source = event.getSource();
if (event instanceof AfterLoadEvent) {
AfterLoadEvent afterLoadEvent = (AfterLoadEvent) event;
if (domainClass.isAssignableFrom(afterLoadEvent.getType())) {
onAfterLoad((AfterLoadEvent) event);
}
return;
}
if (event instanceof AbstractDeleteEvent) {
Class eventDomainType = ((AbstractDeleteEvent) event).getType();
if (eventDomainType != null && domainClass.isAssignableFrom(eventDomainType)) {
if (event instanceof BeforeDeleteEvent) {
onBeforeDelete((BeforeDeleteEvent) event);
}
if (event instanceof AfterDeleteEvent) {
onAfterDelete((AfterDeleteEvent) event);
}
}
return;
}
// Check for matching domain type and invoke callbacks.
if (!domainClass.isAssignableFrom(source.getClass())) {
return;
}
if (event instanceof BeforeSaveEvent) {
onBeforeSave((BeforeSaveEvent) event);
} else if (event instanceof AfterSaveEvent) {
onAfterSave((AfterSaveEvent) event);
} else if (event instanceof AfterConvertEvent) {
onAfterConvert((AfterConvertEvent) event);
}
}
/**
* Captures {@link BeforeSaveEvent}.
*
* @param event will never be {@literal null}.
*/
public void onBeforeSave(BeforeSaveEvent event) {
if (log.isDebugEnabled()) {
log.debug(String.format("onBeforeSave(%s)", event.getSource()));
}
}
/**
* Captures {@link AfterSaveEvent}.
*
* @param event will never be {@literal null}.
*/
public void onAfterSave(AfterSaveEvent event) {
if (log.isDebugEnabled()) {
log.debug(String.format("onAfterSave(%s)", event.getSource()));
}
}
/**
* Captures {@link BeforeDeleteEvent}.
*
* @param event will never be {@literal null}.
*/
public void onBeforeDelete(BeforeDeleteEvent event) {
if (log.isDebugEnabled()) {
log.debug(String.format("onBeforeDelete(%s)", event.getSource()));
}
}
/**
* Captures {@link AfterDeleteEvent}.
*
* @param event will never be {@literal null}.
*/
public void onAfterDelete(AfterDeleteEvent event) {
if (log.isDebugEnabled()) {
log.debug(String.format("onAfterDelete(%s)", event.getSource()));
}
}
/**
* Captures {@link AfterLoadEvent}.
*
* @param event will never be {@literal null}.
*/
public void onAfterLoad(AfterLoadEvent event) {
if (log.isDebugEnabled()) {
log.debug(String.format("onAfterLoad(%s)", event.getSource()));
}
}
/**
* Captures {@link AfterConvertEvent}.
*
* @param event will never be {@literal null}.
*/
public void onAfterConvert(AfterConvertEvent event) {
if (log.isDebugEnabled()) {
log.debug(String.format("onAfterConvert(%s)", event.getSource()));
}
}
}