/*
* Copyright (c) the original 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 com.complexible.stardog.ext.spring.batch;
import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.batch.item.ItemWriter;
import com.complexible.stardog.StardogException;
import com.complexible.stardog.api.Adder;
import com.complexible.stardog.api.Connection;
import com.complexible.stardog.ext.spring.DataSource;
/**
* Implementation of the Spring Batch ItemWriter interface that supports the SNARL API
*
* @author Al Baker
* @author Clark & Parsia
*
*/
public class SnarlItemWriter<T> implements ItemWriter<T> {
final Logger log = LoggerFactory.getLogger(SnarlItemWriter.class);
private DataSource dataSource;
private BatchAdderCallback<T> callback;
@Override
public void write(List<? extends T> items) throws Exception {
Connection connection = dataSource.getConnection();
Adder adder = null;
try {
connection.begin();
adder = connection.add();
callback.write(adder, items);
connection.commit();
} catch (StardogException e) {
log.error("Error with SnarlItemWriter ", e);
throw new RuntimeException(e);
} finally {
adder = null;
dataSource.releaseConnection(connection);
}
}
/**
* @return the dataSource
*/
public DataSource getDataSource() {
return dataSource;
}
/**
* @param dataSource the dataSource to set
*/
public void setDataSource(DataSource dataSource) {
this.dataSource = dataSource;
}
/**
* @return the callback
*/
public BatchAdderCallback<T> getCallback() {
return callback;
}
/**
* @param callback the callback to set
*/
public void setCallback(BatchAdderCallback<T> callback) {
this.callback = callback;
}
}