| /* |
| * 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.bookkeeper.mledger.impl; |
| |
| import static org.testng.Assert.assertEquals; |
| import static org.testng.Assert.assertFalse; |
| import static org.testng.Assert.assertTrue; |
| import static org.testng.Assert.fail; |
| |
| import java.util.List; |
| import java.util.concurrent.TimeUnit; |
| |
| import org.apache.bookkeeper.mledger.Entry; |
| import org.apache.bookkeeper.mledger.ManagedLedger; |
| import org.apache.bookkeeper.mledger.ManagedLedgerConfig; |
| import org.apache.bookkeeper.mledger.ManagedLedgerException.ManagedLedgerNotFoundException; |
| import org.apache.bookkeeper.mledger.Position; |
| import org.apache.bookkeeper.mledger.ReadOnlyCursor; |
| import org.apache.bookkeeper.test.MockedBookKeeperTestCase; |
| import org.testng.annotations.Test; |
| |
| public class ReadOnlyCursorTest extends MockedBookKeeperTestCase { |
| |
| @Test |
| void notFound() throws Exception { |
| try { |
| factory.openReadOnlyCursor("notFound", PositionImpl.EARLIEST, new ManagedLedgerConfig()); |
| fail("Should have failed"); |
| } catch (ManagedLedgerNotFoundException e) { |
| // Expected |
| } |
| |
| factory.shutdown(); |
| } |
| |
| @Test |
| void simple() throws Exception { |
| ManagedLedger ledger = factory.open("simple", new ManagedLedgerConfig().setRetentionTime(1, TimeUnit.HOURS)); |
| |
| int N = 10; |
| |
| for (int i = 0; i < N; i++) { |
| ledger.addEntry(("entry-" + i).getBytes()); |
| } |
| |
| ReadOnlyCursor cursor = factory.openReadOnlyCursor("simple", PositionImpl.EARLIEST, new ManagedLedgerConfig()); |
| |
| assertEquals(cursor.getNumberOfEntries(), N); |
| assertTrue(cursor.hasMoreEntries()); |
| |
| List<Entry> entries = cursor.readEntries(N); |
| assertEquals(entries.size(), N); |
| |
| assertEquals(cursor.getNumberOfEntries(), 0); |
| assertFalse(cursor.hasMoreEntries()); |
| entries.forEach(Entry::release); |
| cursor.close(); |
| |
| // Ensure we can still write to ledger |
| for (int i = 0; i < N; i++) { |
| ledger.addEntry(("entry-" + i).getBytes()); |
| } |
| |
| // Open a new cursor |
| cursor = factory.openReadOnlyCursor("simple", PositionImpl.EARLIEST, new ManagedLedgerConfig()); |
| |
| assertEquals(cursor.getNumberOfEntries(), 2 * N); |
| assertTrue(cursor.hasMoreEntries()); |
| |
| entries = cursor.readEntries(N); |
| assertEquals(entries.size(), N); |
| |
| assertEquals(cursor.getNumberOfEntries(), N); |
| assertTrue(cursor.hasMoreEntries()); |
| entries.forEach(Entry::release); |
| |
| entries = cursor.readEntries(N); |
| assertEquals(entries.size(), N); |
| |
| assertEquals(cursor.getNumberOfEntries(), 0); |
| assertFalse(cursor.hasMoreEntries()); |
| entries.forEach(Entry::release); |
| |
| cursor.close(); |
| } |
| |
| @Test |
| void skip() throws Exception { |
| ManagedLedger ledger = factory.open("skip", |
| new ManagedLedgerConfig() |
| .setMaxEntriesPerLedger(2) |
| .setRetentionTime(1, TimeUnit.HOURS) |
| .setRetentionSizeInMB(-1)); |
| |
| int N = 10; |
| |
| for (int i = 0; i < N; i++) { |
| ledger.addEntry(("entry-" + i).getBytes()); |
| } |
| |
| ReadOnlyCursor cursor = factory.openReadOnlyCursor("skip", PositionImpl.EARLIEST, new ManagedLedgerConfig()); |
| |
| assertEquals(cursor.getNumberOfEntries(), N); |
| assertTrue(cursor.hasMoreEntries()); |
| |
| cursor.skipEntries(5); |
| |
| assertEquals(cursor.getNumberOfEntries(), N - 5); |
| assertTrue(cursor.hasMoreEntries()); |
| |
| cursor.close(); |
| } |
| |
| @Test |
| void skipAll() throws Exception { |
| ManagedLedger ledger = factory.open("skip-all", |
| new ManagedLedgerConfig().setMaxEntriesPerLedger(7).setRetentionTime(1, TimeUnit.HOURS)); |
| |
| int N = 10; |
| |
| for (int i = 0; i < N; i++) { |
| ledger.addEntry(("entry-" + i).getBytes()); |
| } |
| |
| ReadOnlyCursor cursor = factory.openReadOnlyCursor("skip-all", PositionImpl.EARLIEST, |
| new ManagedLedgerConfig()); |
| |
| assertEquals(cursor.getNumberOfEntries(), N); |
| assertTrue(cursor.hasMoreEntries()); |
| |
| cursor.skipEntries(N); |
| |
| assertEquals(cursor.getNumberOfEntries(), 0); |
| assertFalse(cursor.hasMoreEntries()); |
| |
| cursor.close(); |
| } |
| |
| @Test |
| void skipMultiple() throws Exception { |
| ManagedLedger ledger = factory.open("skip", |
| new ManagedLedgerConfig() |
| .setMaxEntriesPerLedger(7) |
| .setRetentionTime(1, TimeUnit.HOURS) |
| .setRetentionSizeInMB(-1)); |
| |
| int N = 30; |
| |
| for (int i = 0; i < N; i++) { |
| ledger.addEntry(("entry-" + i).getBytes()); |
| } |
| |
| ReadOnlyCursor cursor = factory.openReadOnlyCursor("skip", PositionImpl.EARLIEST, new ManagedLedgerConfig()); |
| |
| assertEquals(cursor.getNumberOfEntries(), N); |
| assertTrue(cursor.hasMoreEntries()); |
| |
| cursor.skipEntries(25); |
| |
| assertEquals(cursor.getNumberOfEntries(), 5); |
| assertTrue(cursor.hasMoreEntries()); |
| |
| cursor.skipEntries(5); |
| |
| assertEquals(cursor.getNumberOfEntries(), 0); |
| assertFalse(cursor.hasMoreEntries()); |
| |
| cursor.close(); |
| } |
| |
| @Test |
| void empty() throws Exception { |
| factory.open("empty", new ManagedLedgerConfig().setRetentionTime(1, TimeUnit.HOURS)); |
| |
| ReadOnlyCursor cursor = factory.openReadOnlyCursor("empty", PositionImpl.EARLIEST, new ManagedLedgerConfig()); |
| |
| assertEquals(cursor.getNumberOfEntries(), 0); |
| assertFalse(cursor.hasMoreEntries()); |
| |
| cursor.close(); |
| } |
| |
| @Test |
| void specifyStartPosition() throws Exception { |
| ManagedLedger ledger = factory.open("simple", new ManagedLedgerConfig().setRetentionTime(1, TimeUnit.HOURS)); |
| |
| int N = 10; |
| |
| for (int i = 0; i < N; i++) { |
| ledger.addEntry(("entry-" + i).getBytes()); |
| } |
| |
| ReadOnlyCursor cursor = factory.openReadOnlyCursor("simple", PositionImpl.EARLIEST, new ManagedLedgerConfig()); |
| |
| assertEquals(cursor.getNumberOfEntries(), N); |
| assertTrue(cursor.hasMoreEntries()); |
| |
| Position readPosition = cursor.getReadPosition(); |
| cursor = factory.openReadOnlyCursor("simple", readPosition, new ManagedLedgerConfig()); |
| |
| assertEquals(cursor.getNumberOfEntries(), N); |
| assertTrue(cursor.hasMoreEntries()); |
| |
| cursor.skipEntries(5); |
| |
| Position newReadPosition = cursor.getReadPosition(); |
| cursor = factory.openReadOnlyCursor("simple", newReadPosition, new ManagedLedgerConfig()); |
| |
| assertEquals(cursor.getNumberOfEntries(), N - 5); |
| assertTrue(cursor.hasMoreEntries()); |
| } |
| |
| } |