org.teiid.spring.autoconfigure.TeiidInitializer 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.teiid.spring.autoconfigure;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import javax.annotation.PostConstruct;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationListener;
import org.springframework.core.io.Resource;
import org.springframework.jdbc.config.SortedResourcesFactoryBean;
/**
* Bean to handle {@link TeiidServer} initialization by running
* {@literal teiid.ddl} on {@link PostConstruct} on a
* {@link TeiidInitializedEvent}.
*
* Code borrowed from {@link DataSourceInitializedEvent}
*/
class TeiidInitializer implements ApplicationListener {
private static final Log logger = LogFactory.getLog(TeiidInitializer.class);
private final ApplicationContext applicationContext;
private TeiidServer teiidServer;
private boolean initialized = false;
TeiidInitializer(ApplicationContext applicationContext) {
this.applicationContext = applicationContext;
}
@PostConstruct
public void init() {
if (this.applicationContext.getBeanNamesForType(TeiidServer.class, false, false).length > 0) {
this.teiidServer = this.applicationContext.getBean(TeiidServer.class);
}
if (this.teiidServer == null) {
logger.debug("No DataSource found so not initializing");
return;
}
runSchemaScripts();
}
private void runSchemaScripts() {
}
@Override
public void onApplicationEvent(TeiidInitializedEvent event) {
// NOTE the event can happen more than once and
// the event datasource is not used here
if (!this.initialized) {
runDataScripts();
this.initialized = true;
}
}
private void runDataScripts() {
// none right now.
}
static List getClasspathResources(ApplicationContext context, String... locations) {
List resources = new ArrayList();
for (String location : locations) {
getClasspathResources(context, resources, location);
}
return resources;
}
private static void getClasspathResources(ApplicationContext context, List resources, String location) {
for (Resource resource : doGetResources("classpath*:" +location, context)) {
if (resource.exists()) {
resources.add(resource);
}
}
}
private static Resource[] doGetResources(String location, ApplicationContext context) {
try {
SortedResourcesFactoryBean factory = new SortedResourcesFactoryBean(context,
Collections.singletonList(location));
factory.afterPropertiesSet();
return factory.getObject();
} catch (Exception ex) {
throw new IllegalStateException("Unable to load resources from " + location, ex);
}
}
}