| /* |
| * 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.db.guardrails; |
| |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| import static java.lang.String.format; |
| |
| /** |
| * Tests the guardrail for the number of materialized views in a table, {@link Guardrails#materializedViewsPerTable}. |
| */ |
| public class GuardrailViewsPerTableTest extends ThresholdTester |
| { |
| private static final int VIEWS_PER_TABLE_WARN_THRESHOLD = 1; |
| private static final int VIEWS_PER_TABLE_FAIL_THRESHOLD = 3; |
| |
| private static final String CREATE_TABLE = "CREATE TABLE %s (k int PRIMARY KEY, v int)"; |
| private static final String CREATE_VIEW = "CREATE MATERIALIZED VIEW %s AS SELECT * FROM %%s " + |
| "WHERE k IS NOT NULL AND v IS NOT NULL PRIMARY KEY (v, k)"; |
| |
| public GuardrailViewsPerTableTest() |
| { |
| super(VIEWS_PER_TABLE_WARN_THRESHOLD, |
| VIEWS_PER_TABLE_FAIL_THRESHOLD, |
| Guardrails.materializedViewsPerTable, |
| Guardrails::setMaterializedViewsPerTableThreshold, |
| Guardrails::getMaterializedViewsPerTableWarnThreshold, |
| Guardrails::getMaterializedViewsPerTableFailThreshold); |
| } |
| |
| @Override |
| protected long currentValue() |
| { |
| return getCurrentColumnFamilyStore().viewManager.size(); |
| } |
| |
| @Before |
| public void before() |
| { |
| super.before(); |
| createTable(CREATE_TABLE); |
| } |
| |
| @Test |
| public void testCreateView() throws Throwable |
| { |
| String view1 = assertCreateViewSucceeds(); |
| assertCurrentValue(1); |
| |
| assertCreateViewWarns(); |
| assertCreateViewWarns(); |
| assertCreateViewFails(); |
| assertCurrentValue(3); |
| |
| // drop the first view, we should be able to create new MV again |
| dropView(view1); |
| assertCurrentValue(2); |
| assertCreateViewWarns(); |
| assertCreateViewFails(); |
| assertCurrentValue(3); |
| |
| // previous guardrail should not apply to another base table |
| createTable("CREATE TABLE %s (k int primary key, v int)"); |
| assertCreateViewSucceeds(); |
| assertCreateViewWarns(); |
| assertCreateViewWarns(); |
| assertCreateViewFails(); |
| assertCurrentValue(3); |
| } |
| |
| @Test |
| public void testExcludedUsers() throws Throwable |
| { |
| createTable("CREATE TABLE %s (k int PRIMARY KEY, v1 int, v2 int)"); |
| |
| testExcludedUsers(() -> format("CREATE MATERIALIZED VIEW %s AS SELECT * FROM %s " + |
| " WHERE k IS NOT NULL AND v1 IS NOT NULL PRIMARY KEY (v1, k)", |
| createViewName(), currentTable()), |
| () -> format("CREATE MATERIALIZED VIEW %s AS SELECT * FROM %s " + |
| " WHERE k IS NOT NULL AND v2 IS NOT NULL PRIMARY KEY (v2, k)", |
| createViewName(), currentTable())); |
| } |
| |
| private String assertCreateViewSucceeds() throws Throwable |
| { |
| String viewName = createViewName(); |
| assertMaxThresholdValid(format(CREATE_VIEW, viewName)); |
| return viewName; |
| } |
| |
| private void assertCreateViewWarns() throws Throwable |
| { |
| String viewName = createViewName(); |
| assertThresholdWarns(format(CREATE_VIEW, viewName), |
| format("Creating materialized view %s on table %s, current number of views %s exceeds warning threshold of %s.", |
| viewName, currentTable(), currentValue() + 1, guardrails().getMaterializedViewsPerTableWarnThreshold())); |
| } |
| |
| private void assertCreateViewFails() throws Throwable |
| { |
| String viewName = createViewName(); |
| assertThresholdFails(format(CREATE_VIEW, viewName), |
| format("aborting the creation of materialized view %s on table %s", |
| viewName, currentTable())); |
| } |
| } |