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https://github.com/Alfresco/alfresco-community-repo.git
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ALF-9613: (fake) slow content store and CachingContentStore tests to use it.
Created a stub content store that reads and writes very slowly and end-to-end tests that utilise the slow store to prove there is a speed up on reading and writing through the CachingContentStore. git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@29838 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
This commit is contained in:
Matt Ward
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/*
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* Copyright (C) 2005-2011 Alfresco Software Limited.
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*
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* This file is part of Alfresco
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*
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* Alfresco is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Alfresco is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.alfresco.repo.content.caching.test;
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import java.io.IOException;
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import java.nio.ByteBuffer;
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import java.nio.channels.ReadableByteChannel;
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import java.nio.channels.WritableByteChannel;
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import org.alfresco.repo.content.AbstractContentReader;
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import org.alfresco.repo.content.AbstractContentStore;
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import org.alfresco.repo.content.AbstractContentWriter;
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import org.alfresco.repo.content.filestore.FileContentStore;
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import org.alfresco.service.cmr.repository.ContentIOException;
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import org.alfresco.service.cmr.repository.ContentReader;
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import org.alfresco.service.cmr.repository.ContentWriter;
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/**
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* Package-private class - only for testing the CachingContentStore.
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*
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* @author Matt Ward
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*/
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class SlowContentStore extends AbstractContentStore
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{
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/*
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* @see org.alfresco.repo.content.ContentStore#isWriteSupported()
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*/
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@Override
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public boolean isWriteSupported()
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{
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return true;
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}
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/*
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* @see org.alfresco.repo.content.ContentStore#getReader(java.lang.String)
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*/
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@Override
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public ContentReader getReader(String contentUrl)
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{
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return new SlowReader(contentUrl);
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}
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@Override
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protected ContentWriter getWriterInternal(ContentReader existingContentReader, String newContentUrl)
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{
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if (newContentUrl == null)
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newContentUrl = FileContentStore.createNewFileStoreUrl() + ".slow";
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return new SlowWriter(newContentUrl, existingContentReader);
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}
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@Override
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public boolean exists(String contentUrl)
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{
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return false;
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}
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private class SlowWriter extends AbstractContentWriter
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{
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protected SlowWriter(String contentUrl, ContentReader existingContentReader)
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{
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super(contentUrl, existingContentReader);
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}
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@Override
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public long getSize()
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{
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return 20;
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}
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@Override
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protected ContentReader createReader() throws ContentIOException
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{
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return new SlowReader(getContentUrl());
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}
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@Override
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protected WritableByteChannel getDirectWritableChannel() throws ContentIOException
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{
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return new WritableByteChannel()
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{
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private boolean closed = false;
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private int left = 200;
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@Override
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public boolean isOpen()
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{
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return !closed;
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}
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@Override
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public void close() throws IOException
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{
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closed = true;
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}
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@Override
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public int write(ByteBuffer src) throws IOException
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{
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try
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{
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Thread.sleep(50);
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}
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catch (InterruptedException error)
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{
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throw new RuntimeException(error);
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}
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if (left > 0)
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{
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src.get();
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left--;
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return 1;
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}
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return 0;
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}
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};
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}
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}
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private class SlowReader extends AbstractContentReader
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{
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protected SlowReader(String contentUrl)
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{
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super(contentUrl);
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}
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@Override
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public boolean exists()
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{
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return true;
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}
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@Override
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public long getLastModified()
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{
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return 0L;
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}
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@Override
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public long getSize()
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{
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return 20;
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}
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@Override
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protected ContentReader createReader() throws ContentIOException
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{
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return new SlowReader(getContentUrl());
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}
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@Override
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protected ReadableByteChannel getDirectReadableChannel() throws ContentIOException
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{
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return new ReadableByteChannel()
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{
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private final byte[] content = "This is the content for my slow ReadableByteChannel".getBytes();
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private int index = 0;
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private boolean closed = false;
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@Override
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public boolean isOpen()
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{
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return !closed;
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}
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@Override
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public void close() throws IOException
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{
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closed = true;
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}
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@Override
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public int read(ByteBuffer dst) throws IOException
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{
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if (index < content.length)
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{
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try
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{
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Thread.sleep(50);
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}
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catch (InterruptedException error)
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{
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throw new RuntimeException(error);
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}
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dst.put(content[index++]);
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return 1;
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}
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else
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{
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return 0;
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}
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}
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};
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}
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}
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public static void main(String[] args)
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{
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SlowContentStore scs = new SlowContentStore();
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ContentReader reader = scs.getReader("store://something/bin");
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String content = reader.getContentString();
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System.out.println("Content: " + content);
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}
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}
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@@ -0,0 +1,140 @@
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/*
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* Copyright (C) 2005-2011 Alfresco Software Limited.
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*
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* This file is part of Alfresco
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*
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* Alfresco is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Alfresco is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.alfresco.repo.content.caching.test;
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import static org.junit.Assert.assertEquals;
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import static org.junit.Assert.assertTrue;
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import org.alfresco.repo.content.ContentContext;
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import org.alfresco.repo.content.caching.CachingContentStore;
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import org.alfresco.util.ApplicationContextHelper;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.junit.Test;
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import org.springframework.context.support.ClassPathXmlApplicationContext;
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/**
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* Tests that exercise the CachingContentStore in conjunction with a backing store
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* that runs deliberately slowly.
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*
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* @author Matt Ward
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*/
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public class SlowContentStoreTest
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{
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private ClassPathXmlApplicationContext ctx;
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private CachingContentStore cachingStore;
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private static final Log logger = LogFactory.getLog(SlowContentStoreTest.class);
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public SlowContentStoreTest()
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{
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String conf = "classpath:cachingstore/test-context.xml";
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String slowconf = "classpath:cachingstore/test-slow-context.xml";
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ctx = (ClassPathXmlApplicationContext) ApplicationContextHelper.getApplicationContext(new String[] { conf, slowconf });
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cachingStore = (CachingContentStore) ctx.getBean("cachingContentStore");
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cachingStore.setCacheOnInbound(false);
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}
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@Test
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public void readsAreFasterFromCache()
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{
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// First read will hit the SLOW backing store
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TimedStoreReader storeReader = new TimedStoreReader();
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storeReader.execute();
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assertTrue("First read should take a while", storeReader.timeTakenMillis() > 1000);
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logger.info(String.format("First read took %ds", storeReader.timeTakenMillis()));
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// The content came from the slow backing store...
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assertEquals("This is the content for my slow ReadableByteChannel", storeReader.content);
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// Subsequent reads will hit the cache
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for (int i = 0; i < 5; i++)
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{
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storeReader = new TimedStoreReader();
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storeReader.execute();
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assertTrue("Subsequent reads should be fast", storeReader.timeTakenMillis() < 100);
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logger.info(String.format("Cache read took %ds", storeReader.timeTakenMillis()));
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// The content came from the slow backing store, but was cached...
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assertEquals("This is the content for my slow ReadableByteChannel", storeReader.content);
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}
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}
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@Test
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public void writeThroughCacheResultsInFastReadFirstTime()
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{
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cachingStore.setCacheOnInbound(true);
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// This content will be cached on the way in
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cachingStore.getWriter(new ContentContext(null, "any-url")).
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putContent("Content written from " + getClass().getSimpleName());
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// First read will hit cache
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TimedStoreReader storeReader = new TimedStoreReader();
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storeReader.execute();
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assertTrue("First read should be fast", storeReader.timeTakenMillis() < 100);
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logger.info(String.format("First read took %ds", storeReader.timeTakenMillis()));
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assertEquals("Content written from " + getClass().getSimpleName(), storeReader.content);
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// Subsequent reads will also hit the cache
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for (int i = 0; i < 5; i++)
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{
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storeReader = new TimedStoreReader();
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storeReader.execute();
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assertTrue("Subsequent reads should be fast", storeReader.timeTakenMillis() < 100);
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logger.info(String.format("Cache read took %ds", storeReader.timeTakenMillis()));
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// The original cached content, still cached...
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assertEquals("Content written from " + getClass().getSimpleName(), storeReader.content);
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}
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}
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private class TimedStoreReader extends TimedExecutor
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{
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String content;
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@Override
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protected void doExecute()
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{
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content = cachingStore.getReader("any-url").getContentString();
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logger.info("Read content: " + content);
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}
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}
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private abstract class TimedExecutor
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{
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private long start;
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private long finish;
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public void execute()
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{
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start = System.currentTimeMillis();
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doExecute();
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finish = System.currentTimeMillis();
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}
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public long timeTakenMillis()
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{
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return finish - start;
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}
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protected abstract void doExecute();
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}
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}
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