/*
 * Copyright 2017 NAVER Corp.
 *
 * 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.navercorp.pinpoint.plugin.commons.dbcp.interceptor;

import com.navercorp.pinpoint.bootstrap.interceptor.AroundInterceptor;
import com.navercorp.pinpoint.bootstrap.plugin.monitor.DataSourceMonitorRegistry;
import com.navercorp.pinpoint.bootstrap.util.InterceptorUtils;
import com.navercorp.pinpoint.plugin.commons.dbcp.DataSourceMonitorAccessor;
import com.navercorp.pinpoint.plugin.commons.dbcp.DbcpDataSourceMonitor;
import org.apache.commons.dbcp.BasicDataSource;

/**
 * @author Taejin Koo
 */
public class DataSourceConstructorInterceptor implements AroundInterceptor {

    private final DataSourceMonitorRegistry dataSourceMonitorRegistry;

    public DataSourceConstructorInterceptor(DataSourceMonitorRegistry dataSourceMonitorRegistry) {
        this.dataSourceMonitorRegistry = dataSourceMonitorRegistry;
    }

    @Override
    public void before(Object target, Object[] args) {
    }

    @Override
    public void after(Object target, Object[] args, Object result, Throwable throwable) {
        if (!InterceptorUtils.isSuccess(throwable)) {
            return;
        }

        final BasicDataSource basicDataSource = getBasicDatasource(target);
        if (basicDataSource instanceof DataSourceMonitorAccessor) {
            DbcpDataSourceMonitor dataSourceMonitor = new DbcpDataSourceMonitor(basicDataSource);
            dataSourceMonitorRegistry.register(dataSourceMonitor);

            ((DataSourceMonitorAccessor) basicDataSource)._$PINPOINT$_setDataSourceMonitor(dataSourceMonitor);
        }
    }

    private BasicDataSource getBasicDatasource(Object target) {
        if (target instanceof BasicDataSource) {
            return (BasicDataSource) target;
        }
        return null;
    }

}
