| /* |
| * 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.distributed.test; |
| |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| import org.junit.Test; |
| |
| import org.apache.cassandra.distributed.Cluster; |
| import org.apache.cassandra.distributed.api.ConsistencyLevel; |
| import org.apache.cassandra.distributed.api.Row; |
| import org.apache.cassandra.distributed.api.SimpleQueryResult; |
| |
| import static org.assertj.core.api.Assertions.assertThat; |
| import static org.junit.Assert.assertTrue; |
| |
| public class QueriesTableTest extends TestBaseImpl |
| { |
| public static final int ITERATIONS = 256; |
| |
| @Test |
| public void shouldExposeReadsAndWrites() throws Throwable |
| { |
| try (Cluster cluster = init(Cluster.build(1).start())) |
| { |
| ExecutorService executor = Executors.newFixedThreadPool(16); |
| |
| cluster.schemaChange("CREATE TABLE " + KEYSPACE + ".tbl (k int primary key, v int)"); |
| |
| AtomicInteger reads = new AtomicInteger(0); |
| AtomicInteger writes = new AtomicInteger(0); |
| AtomicInteger paxos = new AtomicInteger(0); |
| |
| for (int i = 0; i < ITERATIONS; i++) |
| { |
| int k = i; |
| executor.execute(() -> cluster.coordinator(1).execute("INSERT INTO " + KEYSPACE + ".tbl (k, v) VALUES (" + k + ", 0)", ConsistencyLevel.ALL)); |
| executor.execute(() -> cluster.coordinator(1).execute("UPDATE " + KEYSPACE + ".tbl SET v = 10 WHERE k = " + (k - 1) + " IF v = 0", ConsistencyLevel.ALL)); |
| executor.execute(() -> cluster.coordinator(1).execute("SELECT * FROM " + KEYSPACE + ".tbl WHERE k = " + (k - 1), ConsistencyLevel.ALL)); |
| |
| executor.execute(() -> |
| { |
| SimpleQueryResult result = cluster.get(1).executeInternalWithResult("SELECT * FROM system_views.queries"); |
| |
| while (result.hasNext()) |
| { |
| Row row = result.next(); |
| String threadId = row.get("thread_id").toString(); |
| String task = row.get("task").toString(); |
| |
| if (threadId.contains("Read") && task.contains("SELECT")) |
| reads.incrementAndGet(); |
| else if (threadId.contains("Mutation") && task.contains("Mutation")) |
| writes.incrementAndGet(); |
| else if (threadId.contains("Mutation") && task.contains("Paxos")) |
| paxos.incrementAndGet(); |
| } |
| }); |
| } |
| |
| executor.shutdown(); |
| assertTrue(executor.awaitTermination(1, TimeUnit.MINUTES)); |
| |
| // We should see at least one read, write, and conditional update in the "queries" table. |
| assertThat(reads.get()).isGreaterThan(0).isLessThanOrEqualTo(ITERATIONS); |
| assertThat(writes.get()).isGreaterThan(0).isLessThanOrEqualTo(ITERATIONS); |
| assertThat(paxos.get()).isGreaterThan(0).isLessThanOrEqualTo(ITERATIONS); |
| } |
| } |
| } |