| /* |
| * 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.qi4j.library.eventsourcing.application.source.memory; |
| |
| import org.qi4j.api.activation.Activators; |
| import org.qi4j.api.mixin.Mixins; |
| import org.qi4j.api.service.ServiceComposite; |
| import org.qi4j.io.Input; |
| import org.qi4j.io.Output; |
| import org.qi4j.io.Receiver; |
| import org.qi4j.io.Sender; |
| import org.qi4j.library.eventsourcing.application.api.TransactionApplicationEvents; |
| import org.qi4j.library.eventsourcing.application.source.*; |
| import org.qi4j.library.eventsourcing.domain.api.UnitOfWorkDomainEventsValue; |
| |
| import java.io.IOException; |
| import java.util.*; |
| |
| /** |
| * In-Memory ApplicationEventStore. Mainly used for testing. |
| */ |
| @Mixins( MemoryApplicationEventStoreService.MemoryStoreMixin.class ) |
| @Activators( ApplicationEventStoreActivation.Activator.class ) |
| public interface MemoryApplicationEventStoreService |
| extends ApplicationEventSource, ApplicationEventStore, ApplicationEventStream, ApplicationEventStoreActivation, ServiceComposite |
| { |
| abstract class MemoryStoreMixin |
| extends AbstractApplicationEventStoreMixin |
| implements ApplicationEventSource, ApplicationEventStoreActivation |
| { |
| // This list holds all transactions |
| private LinkedList<TransactionApplicationEvents> store = new LinkedList<TransactionApplicationEvents>(); |
| |
| @Override |
| public Input<TransactionApplicationEvents, IOException> transactionsAfter( final long afterTimestamp, final long maxTransactions ) |
| { |
| return new Input<TransactionApplicationEvents, IOException>() |
| { |
| @Override |
| public <ReceiverThrowableType extends Throwable> void transferTo( Output<? super TransactionApplicationEvents, ReceiverThrowableType> output ) |
| throws IOException, ReceiverThrowableType |
| { |
| // Lock store first |
| lock.lock(); |
| try |
| { |
| output.receiveFrom( new Sender<TransactionApplicationEvents, IOException>() |
| { |
| @Override |
| public <ReceiverThrowableType extends Throwable> void sendTo( Receiver<? super TransactionApplicationEvents, ReceiverThrowableType> receiver ) |
| throws ReceiverThrowableType, IOException |
| { |
| Iterator<TransactionApplicationEvents> iterator = store.iterator(); |
| |
| long count = 0; |
| |
| while( iterator.hasNext() && count < maxTransactions ) |
| { |
| TransactionApplicationEvents next = iterator.next(); |
| if( next.timestamp().get() > afterTimestamp ) |
| { |
| receiver.receive( next ); |
| count++; |
| } |
| } |
| } |
| }); |
| } |
| finally |
| { |
| lock.unlock(); |
| } |
| } |
| }; |
| } |
| |
| @Override |
| public Input<TransactionApplicationEvents, IOException> transactionsBefore( final long beforeTimestamp, final long maxTransactions ) |
| { |
| return new Input<TransactionApplicationEvents, IOException>() |
| { |
| @Override |
| public <ReceiverThrowableType extends Throwable> void transferTo( Output<? super TransactionApplicationEvents, ReceiverThrowableType> output ) |
| throws IOException, ReceiverThrowableType |
| { |
| // Lock store first |
| lock.lock(); |
| try |
| { |
| output.receiveFrom( new Sender<TransactionApplicationEvents, IOException>() |
| { |
| @Override |
| public <ReceiverThrowableType extends Throwable> void sendTo( Receiver<? super TransactionApplicationEvents, ReceiverThrowableType> receiver ) |
| throws ReceiverThrowableType, IOException |
| { |
| Iterator<TransactionApplicationEvents> iterator = store.descendingIterator(); |
| |
| long count = 0; |
| |
| while( iterator.hasNext() && count < maxTransactions ) |
| { |
| TransactionApplicationEvents next = iterator.next(); |
| if( next.timestamp().get() < beforeTimestamp ) |
| { |
| receiver.receive( next ); |
| count++; |
| } |
| } |
| } |
| }); |
| } |
| finally |
| { |
| lock.unlock(); |
| } |
| } |
| }; |
| } |
| |
| @Override |
| protected void storeEvents( TransactionApplicationEvents transactionDomain ) throws IOException |
| { |
| store.add( transactionDomain ); |
| } |
| } |
| } |