/*
* 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.cassandra.schema;
import java.util.Collection;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.cassandra.concurrent.Stage;
import org.apache.cassandra.concurrent.StageManager;
import org.apache.cassandra.db.Mutation;
import org.apache.cassandra.net.IVerbHandler;
import org.apache.cassandra.net.MessageIn;
/**
* Called when node receives updated schema state from the schema migration coordinator node.
* Such happens when user makes local schema migration on one of the nodes in the ring
* (which is going to act as coordinator) and that node sends (pushes) it's updated schema state
* (in form of mutations) to all the alive nodes in the cluster.
*/
public final class SchemaPushVerbHandler implements IVerbHandler<Collection<Mutation>>
{
private static final Logger logger = LoggerFactory.getLogger(SchemaPushVerbHandler.class);
public void doVerb(final MessageIn<Collection<Mutation>> message, int id)
{
logger.trace("Received schema push request from {}", message.from);
StageManager.getStage(Stage.MIGRATION).submit(() -> Schema.instance.mergeAndAnnounceVersion(message.payload));
}
}