git.opendaylight Code Review - controller.git/blob

   1 /*
   2  * Copyright (c) 2014 Brocade Communications Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.controller.cluster.datastore.utils;
   9
  10 import static org.junit.Assert.assertEquals;
  11 import java.util.Collections;
  12 import java.util.Iterator;
  13 import java.util.Map;
  14 import java.util.concurrent.Callable;
  15 import java.util.concurrent.ConcurrentHashMap;
  16 import java.util.concurrent.CountDownLatch;
  17 import java.util.concurrent.TimeUnit;
  18 import com.google.common.collect.Maps;
  19 import com.google.common.util.concurrent.Uninterruptibles;
  20 import scala.concurrent.Future;
  21 import akka.dispatch.Futures;
  22 import akka.japi.Procedure;
  23 import akka.persistence.PersistentConfirmation;
  24 import akka.persistence.PersistentId;
  25 import akka.persistence.PersistentImpl;
  26 import akka.persistence.PersistentRepr;
  27 import akka.persistence.journal.japi.AsyncWriteJournal;
  28
  29 public class InMemoryJournal extends AsyncWriteJournal {
  30
  31     private static final Map<String, Map<Long, Object>> journals = new ConcurrentHashMap<>();
  32
  33     private static final Map<String, CountDownLatch> deleteMessagesCompleteLatches = new ConcurrentHashMap<>();
  34
  35     public static void addEntry(String persistenceId, long sequenceNr, Object data) {
  36         Map<Long, Object> journal = journals.get(persistenceId);
  37         if(journal == null) {
  38             journal = Maps.newLinkedHashMap();
  39             journals.put(persistenceId, journal);
  40         }
  41
  42         synchronized (journal) {
  43             journal.put(sequenceNr, data);
  44         }
  45     }
  46
  47     public static void clear() {
  48         journals.clear();
  49     }
  50
  51     public static Map<Long, Object> get(String persistenceId) {
  52         Map<Long, Object> journal = journals.get(persistenceId);
  53         return journal != null ? journal : Collections.<Long, Object>emptyMap();
  54     }
  55
  56     public static void waitForDeleteMessagesComplete(String persistenceId) {
  57         assertEquals("Recovery complete", true, Uninterruptibles.awaitUninterruptibly(
  58                 deleteMessagesCompleteLatches.get(persistenceId), 5, TimeUnit.SECONDS));
  59     }
  60
  61     public static void addDeleteMessagesCompleteLatch(String persistenceId) {
  62         deleteMessagesCompleteLatches.put(persistenceId, new CountDownLatch(1));
  63     }
  64
  65     @Override
  66     public Future<Void> doAsyncReplayMessages(final String persistenceId, long fromSequenceNr,
  67             long toSequenceNr, long max, final Procedure<PersistentRepr> replayCallback) {
  68         return Futures.future(new Callable<Void>() {
  69             @Override
  70             public Void call() throws Exception {
  71                 Map<Long, Object> journal = journals.get(persistenceId);
  72                 if(journal == null) {
  73                     return null;
  74                 }
  75
  76                 synchronized (journal) {
  77                     for (Map.Entry<Long,Object> entry : journal.entrySet()) {
  78                         PersistentRepr persistentMessage =
  79                                 new PersistentImpl(entry.getValue(), entry.getKey(), persistenceId,
  80                                         false, null, null);
  81                         replayCallback.apply(persistentMessage);
  82                     }
  83                 }
  84
  85                 return null;
  86             }
  87         }, context().dispatcher());
  88     }
  89
  90     @Override
  91     public Future<Long> doAsyncReadHighestSequenceNr(String persistenceId, long fromSequenceNr) {
  92         return Futures.successful(-1L);
  93     }
  94
  95     @Override
  96     public Future<Void> doAsyncWriteMessages(final Iterable<PersistentRepr> messages) {
  97         return Futures.future(new Callable<Void>() {
  98             @Override
  99             public Void call() throws Exception {
 100                 for (PersistentRepr repr : messages) {
 101                     Map<Long, Object> journal = journals.get(repr.persistenceId());
 102                     if(journal == null) {
 103                         journal = Maps.newLinkedHashMap();
 104                         journals.put(repr.persistenceId(), journal);
 105                     }
 106
 107                     synchronized (journal) {
 108                         journal.put(repr.sequenceNr(), repr.payload());
 109                     }
 110                 }
 111                 return null;
 112             }
 113         }, context().dispatcher());
 114     }
 115
 116     @Override
 117     public Future<Void> doAsyncWriteConfirmations(Iterable<PersistentConfirmation> confirmations) {
 118         return Futures.successful(null);
 119     }
 120
 121     @Override
 122     public Future<Void> doAsyncDeleteMessages(Iterable<PersistentId> messageIds, boolean permanent) {
 123         return Futures.successful(null);
 124     }
 125
 126     @Override
 127     public Future<Void> doAsyncDeleteMessagesTo(String persistenceId, long toSequenceNr, boolean permanent) {
 128         Map<Long, Object> journal = journals.get(persistenceId);
 129         if(journal != null) {
 130             synchronized (journal) {
 131                 Iterator<Long> iter = journal.keySet().iterator();
 132                 while(iter.hasNext()) {
 133                     Long n = iter.next();
 134                     if(n <= toSequenceNr) {
 135                         iter.remove();
 136                     }
 137                 }
 138             }
 139         }
 140
 141         CountDownLatch latch = deleteMessagesCompleteLatches.get(persistenceId);
 142         if(latch != null) {
 143             latch.countDown();
 144         }
 145
 146         return Futures.successful(null);
 147     }
 148 }