org.fabric3.datasource.runtime.DataSourceWireAttacher Maven / Gradle / Ivy
/*
* Fabric3
* Copyright (c) 2009-2015 Metaform Systems
*
* 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.
* Portions originally based on Apache Tuscany 2007
* licensed under the Apache 2.0 license.
*/
package org.fabric3.datasource.runtime;
import javax.sql.DataSource;
import java.util.function.Supplier;
import org.fabric3.api.host.Fabric3Exception;
import org.fabric3.datasource.provision.DataSourceWireTarget;
import org.fabric3.datasource.spi.DataSourceRegistry;
import org.fabric3.spi.container.builder.TargetWireAttacher;
import org.oasisopen.sca.annotation.Reference;
/**
* Attaches to a runtime DataSource.
*/
public class DataSourceWireAttacher implements TargetWireAttacher {
private DataSourceRegistry registry;
public DataSourceWireAttacher(@Reference DataSourceRegistry registry) {
this.registry = registry;
}
public Supplier createSupplier(DataSourceWireTarget target) {
String dataSourceName = target.getDataSourceName();
DataSource source = registry.getDataSource(dataSourceName);
if (!target.isOptional() && source == null) {
throw new Fabric3Exception("DataSource not found: " + dataSourceName);
}
return () -> source;
}
}