org.molasdin.wbase.transaction.jdbc.JdbcEngine.java Source code

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Here is the source code for org.molasdin.wbase.transaction.jdbc.JdbcEngine.java

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/*
 * Copyright 2014 Bersenev Dmitry molasdin@outlook.com
 *
 * 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.molasdin.wbase.transaction.jdbc;

import org.apache.commons.dbutils.ProxyFactory;
import org.molasdin.wbase.transaction.Engine;

import java.io.IOException;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.sql.Connection;
import java.sql.Statement;
import java.util.LinkedList;
import java.util.List;

/**
 * Created by dbersenev on 15.10.2014.
 */
public class JdbcEngine implements InvocationHandler, Engine {
    private Connection connection;
    private Connection proxy;
    private List<Statement> statements = new LinkedList<Statement>();

    public JdbcEngine(Connection connection) {
        this.connection = connection;
        proxy = ProxyFactory.instance().createConnection(this);
    }

    public Connection connection() {
        return proxy;
    }

    public Connection realConnection() {
        return connection;
    }

    private void closeDependencies() throws Exception {
        for (Statement entry : statements) {
            if (entry.isClosed()) {
                entry.close();
            }
        }
        statements.clear();
    }

    @Override
    public void close() {
        if (statements.isEmpty()) {
            return;
        }
        try {
            closeDependencies();
        } catch (Exception ex) {
            throw new RuntimeException(ex);
        }
    }

    @Override
    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
        Object result = method.invoke(proxy, args);
        if (method.getName().equals("prepareStatement") || method.getName().equals("createStatement")) {
            statements.add((Statement) result);
        }
        return result;
    }
}