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The Apache Cassandra Project develops a highly scalable second-generation distributed database, bringing together Dynamo's fully distributed design and Bigtable's ColumnFamily-based data model.

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/*
 * 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.tools.nodetool;

import static com.google.common.base.Preconditions.checkState;
import io.airlift.airline.Command;

import java.io.IOException;

import org.apache.cassandra.tools.NodeProbe;
import org.apache.cassandra.tools.NodeTool.NodeToolCmd;

@Command(name = "join", description = "Join the ring")
public class Join extends NodeToolCmd
{
    @Override
    public void execute(NodeProbe probe)
    {
        checkState(!probe.isJoined(), "This node has already joined the ring.");
        checkState(!probe.isBootstrapMode(), "Cannot join the ring until bootstrap completes");

        try
        {
            probe.joinRing();
        } catch (IOException e)
        {
            throw new RuntimeException("Error during joining the ring", e);
        }
    }
}