add SPIShardingHook.

/*

 * 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.shardingsphere.core.hook;

import org.apache.shardingsphere.core.metadata.table.ShardingTableMetaData;

import org.apache.shardingsphere.core.route.SQLRouteResult;

import org.apache.shardingsphere.core.spi.NewInstanceServiceLoader;

import java.util.Collection;

/**

 * Sharding hook for SPI.

 *

 * @author zhaojun

 */

public final class SPIShardingHook implements ShardingHook {

    private final Collection<ShardingHook> shardingHooks = NewInstanceServiceLoader.newServiceInstances(ShardingHook.class);

    static {

        NewInstanceServiceLoader.register(ShardingHook.class);

    }

    @Override

    public void start(final String sql) {

        for (ShardingHook each : shardingHooks) {

            each.start(sql);

        }

    }

    @Override

    public void finishSuccess(final SQLRouteResult sqlRouteResult, final ShardingTableMetaData shardingTableMetaData) {

        for (ShardingHook each : shardingHooks) {

            each.finishSuccess(sqlRouteResult, shardingTableMetaData);

        }

    }

    @Override

    public void finishFailure(final Exception cause) {

        for (ShardingHook each : shardingHooks) {

            each.finishFailure(cause);

        }

    }

}