| /* |
| * 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.tephra.util; |
| |
| import com.google.common.collect.Lists; |
| import com.google.common.collect.Sets; |
| import org.apache.tephra.ChangeId; |
| import org.apache.tephra.TransactionType; |
| import org.apache.tephra.persist.TransactionEdit; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Random; |
| import java.util.Set; |
| |
| /** |
| * Util class for {@link TransactionEdit} related tests. |
| */ |
| public final class TransactionEditUtil { |
| private static Random random = new Random(); |
| |
| /** |
| * Generates a number of semi-random {@link TransactionEdit} instances. |
| */ |
| public static List<TransactionEdit> createRandomEdits(int numEntries) { |
| List<co.cask.tephra.persist.TransactionEdit> caskTxEdits = createRandomCaskEdits(numEntries); |
| List<TransactionEdit> txEdits = new ArrayList<>(); |
| for (co.cask.tephra.persist.TransactionEdit caskTxEdit : caskTxEdits) { |
| txEdits.add(TransactionEdit.convertCaskTxEdit(caskTxEdit)); |
| } |
| return txEdits; |
| } |
| |
| /** |
| * Generates a number of semi-random {@link co.cask.tephra.persist.TransactionEdit} instances. |
| * These are just randomly selected from the possible states, so would not necessarily reflect a real-world |
| * distribution. |
| * |
| * @param numEntries how many entries to generate in the returned list. |
| * @return a list of randomly generated transaction log edits. |
| */ |
| @Deprecated |
| public static List<co.cask.tephra.persist.TransactionEdit> createRandomCaskEdits(int numEntries) { |
| List<co.cask.tephra.persist.TransactionEdit> edits = Lists.newArrayListWithCapacity(numEntries); |
| for (int i = 0; i < numEntries; i++) { |
| co.cask.tephra.persist.TransactionEdit.State nextType = |
| co.cask.tephra.persist.TransactionEdit.State.values()[random.nextInt(6)]; |
| long writePointer = Math.abs(random.nextLong()); |
| switch (nextType) { |
| case INPROGRESS: |
| edits.add( |
| co.cask.tephra.persist.TransactionEdit.createStarted(writePointer, writePointer - 1, |
| System.currentTimeMillis() + 300000L, |
| TransactionType.SHORT)); |
| break; |
| case COMMITTING: |
| edits.add(co.cask.tephra.persist.TransactionEdit.createCommitting(writePointer, generateChangeSet(10))); |
| break; |
| case COMMITTED: |
| edits.add(co.cask.tephra.persist.TransactionEdit.createCommitted(writePointer, generateChangeSet(10), |
| writePointer + 1, random.nextBoolean())); |
| break; |
| case INVALID: |
| edits.add(co.cask.tephra.persist.TransactionEdit.createInvalid(writePointer)); |
| break; |
| case ABORTED: |
| edits.add(co.cask.tephra.persist.TransactionEdit.createAborted(writePointer, TransactionType.SHORT, null)); |
| break; |
| case MOVE_WATERMARK: |
| edits.add(co.cask.tephra.persist.TransactionEdit.createMoveWatermark(writePointer)); |
| break; |
| } |
| } |
| return edits; |
| } |
| |
| private static Set<ChangeId> generateChangeSet(int numEntries) { |
| Set<ChangeId> changes = Sets.newHashSet(); |
| for (int i = 0; i < numEntries; i++) { |
| byte[] bytes = new byte[8]; |
| random.nextBytes(bytes); |
| changes.add(new ChangeId(bytes)); |
| } |
| return changes; |
| } |
| } |