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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.tuscany.service.persistence.store.jdbc.converter;
import java.io.BufferedInputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.Serializable;
import java.sql.Blob;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import org.apache.tuscany.spi.services.store.StoreReadException;
import org.apache.tuscany.spi.services.store.StoreWriteException;
/**
* Performs writing and reading operations to a JDBC driver/database combination that supports Blobs
*
* @version $Rev$ $Date$
*/
public class JDBCConverter extends AbstractConverter {
public void insert(PreparedStatement stmt, String ownerId, String id, long expiration, Serializable object)
throws StoreWriteException {
try {
stmt.setString(OWNER, ownerId);
stmt.setString(ID, id);
stmt.setLong(EXPIRATION, expiration);
byte[] data = serialize(object);
InputStream in = new ByteArrayInputStream(data);
stmt.setBinaryStream(DATA, in, data.length);
} catch (SQLException e) {
throw new StoreWriteException(e);
} catch (IOException e) {
throw new StoreWriteException(e);
}
}
public void update(PreparedStatement stmt, String ownerId, String id, Serializable object)
throws StoreWriteException {
throw new UnsupportedOperationException();
}
public Object read(Connection conn, String ownerId, String id) throws StoreReadException {
PreparedStatement stmt = null;
try {
stmt = conn.prepareStatement(findSql);
stmt.setString(OWNER, ownerId);
stmt.setString(ID, id);
ResultSet rs = stmt.executeQuery();
rs.next();
Blob blob = rs.getBlob(DATA);
ByteArrayOutputStream out = new ByteArrayOutputStream();
BufferedInputStream in = new BufferedInputStream(blob.getBinaryStream());
int b;
byte[] buffer = new byte[1024];
while ((b = in.read(buffer, 0, 1024)) != -1) {
out.write(buffer, 0, b);
}
return deserialize(out.toByteArray());
} catch (SQLException e) {
throw new StoreReadException(e);
} catch (IOException e) {
throw new StoreReadException(e);
} catch (ClassNotFoundException e) {
throw new StoreReadException(e);
} finally {
if (stmt != null) {
try {
stmt.close();
} catch (SQLException e) {
// ignore
}
}
}
}
}
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