test/distributed/org/apache/cassandra/distributed/test/AlterTest.java

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 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
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 *
 *     http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.cassandra.distributed.test;

import org.junit.Assert;
import org.junit.Test;

import org.apache.cassandra.db.Keyspace;
import org.apache.cassandra.distributed.Cluster;
import org.apache.cassandra.distributed.api.ICluster;
import org.apache.cassandra.distributed.api.IInstanceConfig;
import org.apache.cassandra.distributed.api.IInvokableInstance;
import org.apache.cassandra.distributed.api.IIsolatedExecutor;
import org.apache.cassandra.distributed.api.SimpleQueryResult;
import org.apache.cassandra.service.StorageService;

import static org.apache.cassandra.distributed.action.GossipHelper.withProperty;
import static org.apache.cassandra.distributed.api.ConsistencyLevel.ONE;
import static org.apache.cassandra.distributed.api.Feature.GOSSIP;
import static org.apache.cassandra.distributed.api.Feature.NATIVE_PROTOCOL;
import static org.apache.cassandra.distributed.api.Feature.NETWORK;
import static org.apache.cassandra.distributed.api.TokenSupplier.evenlyDistributedTokens;
import static org.apache.cassandra.distributed.shared.NetworkTopology.singleDcNetworkTopology;
import static org.assertj.core.api.Assertions.assertThat;
import static org.junit.Assert.assertFalse;

public class AlterTest extends TestBaseImpl
{
    @Test
    public void getAndSetCompressionParametersTest() throws Throwable
    {
        try (ICluster<IInvokableInstance> cluster = init(builder().withNodes(2)
                                                                  .start()))
        {
            cluster.schemaChange("CREATE TABLE " + KEYSPACE + ".tbl (pk int, ck int, v int, PRIMARY KEY (pk, ck));");
            cluster.stream().forEach((i) -> {
                i.acceptsOnInstance((IIsolatedExecutor.SerializableConsumer<String>) (ks) -> {
                    Keyspace.open(ks)
                            .getColumnFamilyStore("tbl")
                            .setCompressionParametersJson("{\"chunk_length_in_kb\": \"128\"," +
                                                          " \"class\": \"org.apache.cassandra.io.compress.LZ4Compressor\"}");
                    Assert.assertTrue(Keyspace.open(ks)
                                              .getColumnFamilyStore("tbl")
                                              .getCompressionParametersJson().contains("128"));
                }).accept(KEYSPACE);
            });
            cluster.schemaChange("ALTER TABLE " + KEYSPACE + ".tbl ADD v2 int");

            cluster.stream().forEach((i) -> {
                i.acceptsOnInstance((IIsolatedExecutor.SerializableConsumer<String>) (ks) -> {
                    Assert.assertFalse(Keyspace.open(ks)
                                               .getColumnFamilyStore("tbl")
                                               .getCompressionParametersJson().contains("128"));
                }).accept(KEYSPACE);
            });
        }
    }

    @Test
    public void alteringKeyspaceOnInsufficientNumberOfReplicasFiltersOutGossppingOnlyMembersTest() throws Throwable
    {
        int originalNodeCount = 1;
        int expandedNodeCount = originalNodeCount + 1;

        try (Cluster cluster = builder().withNodes(originalNodeCount)
                                        .withTokenSupplier(evenlyDistributedTokens(expandedNodeCount, 1))
                                        .withNodeIdTopology(singleDcNetworkTopology(expandedNodeCount, "dc0", "rack0"))
                                        .withConfig(config -> config.with(NETWORK, GOSSIP, NATIVE_PROTOCOL))
                                        .start())
        {
            IInstanceConfig config = cluster.newInstanceConfig();
            IInvokableInstance gossippingOnlyMember = cluster.bootstrap(config);
            withProperty("cassandra.join_ring", Boolean.toString(false), () -> gossippingOnlyMember.startup(cluster));

            int attempts = 0;
            // it takes some time the underlying structure is populated otherwise the test is flaky
            while (((IInvokableInstance) (cluster.get(2))).callOnInstance(() -> StorageService.instance.getTokenMetadata().getAllMembers().isEmpty()))
            {
                if (attempts++ > 30)
                    throw new RuntimeException("timeouted on waiting for a member");
                Thread.sleep(1000);
            }

            for (String operation : new String[] { "CREATE", "ALTER" })
            {
                SimpleQueryResult result = cluster.coordinator(2)
                                                  .executeWithResult(operation + " KEYSPACE abc WITH replication = {'class' : 'NetworkTopologyStrategy', 'dc0' : 2 }",
                                                                     ONE);
                assertFalse(result.warnings().isEmpty());
                assertThat(result.warnings().get(0)).contains("Your replication factor 2 for keyspace abc is higher than the number of nodes 1 for datacenter dc0");
            }
        }
    }
}