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/*-
* ============LICENSE_START=======================================================
* OpenECOMP - org.openecomp.dmaapbc
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.openecomp.dmaapbc.database;
import java.sql.*;
public abstract class ConnWrapper<T, U> {
protected Connection c;
protected PreparedStatement ps;
protected ResultSet rs;
protected abstract T run(U u) throws Exception;
public T protect(ConnectionFactory cf, U u) throws DBException {
try {
try {
return(attempt(cf, u, false));
} catch (SQLException sqle) {
return(attempt(cf, u, true));
}
} catch (RuntimeException rte) {
throw rte;
} catch (Exception e) {
throw new DBException(e);
}
}
private T attempt(ConnectionFactory cf, U u, boolean fresh) throws Exception {
c = null;
ps = null;
rs = null;
try {
c = cf.get(fresh);
T ret = run(u);
cf.release(c);
c = null;
return(ret);
} finally {
if (rs != null) { try { rs.close(); } catch (Exception e) {}}
rs = null;
if (ps != null) { try { ps.close(); } catch (Exception e) {}}
ps = null;
if (c != null) { try { c.close(); } catch (Exception e) {}}
c = null;
}
}
}
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