Examples of org.jcoredb.fs.impl.FileSystem

org.jcoredb.fs.impl.FileSystem
This class provides access to the file system functions those are required @author david.maier@jcoredb.org

  
  @Test
  public void dropTest() throws Exception
  {
    //Create a File System
    IFileSystem fs = new FileSystem(Constants.ROOT_PATH);
    fs.create(0);
    fs.create(Integer.MAX_VALUE);
    fs.close();
    
    //Open the File System
    fs = new FileSystem(Constants.ROOT_PATH);
    fs.open();
    fs.drop(Integer.MAX_VALUE);
    
    assertTrue(new File(Constants.ROOT_PATH + org.jcoredb.system.Constants.PATH_SEP + 0).exists());
    assertFalse(new File(Constants.ROOT_PATH + org.jcoredb.system.Constants.PATH_SEP + Integer.MAX_VALUE).exists());
  }

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  }
  
  @Test
  public void openAndCloseTest() throws Exception
  {
    IFileSystem fs = new FileSystem(Constants.ROOT_PATH);
    fs.create(0);
    
    fs = new FileSystem(Constants.ROOT_PATH);
    fs.open();
    
    FileSystemConfig cfg = Configs.getFSConfig();    
    
    ISegment[] segments = fs.getContainer(0).getSegments();
    
    assertEquals(cfg.getNumOfSegs(), segments.length);
    
    fs.close();
  }

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  }
  
  @Test
  public void readTest() throws Exception
  {
    IFileSystem fs = new FileSystem(Constants.ROOT_PATH);
    fs.create(0);
    fs.open();
    
    ArrayList<Block> blocks = new ArrayList<Block>();
    ArrayList<BlockId> blockIds = new ArrayList<BlockId>();
    
    String testStr = "<test> <content> Hello world! </content> </test>";
    byte[] content = testStr.getBytes();
    
    for (int i = 0; i < 200; i++) {


      Block b = new Block(new BlockId(0));
      b.setBytes(content);
      
      blocks.add(b);
      
      BlockId bid = fs.append(b, false);


      blockIds.add(bid);
    }


        
    Block b = fs.read(new BlockId(0,0,111));
    
    assertEquals(testStr, new String(b.getBytes()).substring(0, testStr.length()));
    
    fs.close();
  }

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  @Test
  public void writeTest() throws Exception
  {


    IFileSystem fs = new FileSystem(Constants.ROOT_PATH);
    fs.create(0);
    fs.open();
    
    ArrayList<Block> blocks = new ArrayList<Block>();
    ArrayList<BlockId> blockIds = new ArrayList<BlockId>();
    
    String testStr = "<test> <content> Hello world! </content> </test>";
    byte[] content = testStr.getBytes();
    
    for (int i = 0; i < 200; i++) {


      Block b = new Block(new BlockId(0));
      b.setBytes(content);
      
      blocks.add(b);
      
      BlockId bid = fs.append(b, false);


      blockIds.add(bid);
    }
    
    String newTestStr = "<test> <content> Hello world, again! </content> </test>";
    byte[] newContent = newTestStr.getBytes();
  
    Block b = new Block(blockIds.get(78));
    b.setBytes(newContent);
    fs.write(b);
    
    
    Block rB = fs.read(blockIds.get(78));
    
    assertEquals(newTestStr, new String(rB.getBytes()).substring(0, newTestStr.length()));  
  }

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  }
  
  @Test
  public void appendSingleThreadedTest() throws Exception
  {
    IFileSystem fs = new FileSystem(Constants.ROOT_PATH);
    fs.create(0);
    fs.open();
    
    Block[] blocks = new Block[NUM_OF_BLOCKS_TO_APPEND];
    
    String testStr = "<test> <content> Hello world! </content> </test>";
    byte[] content = testStr.getBytes();
    
    for (int i = 0; i < NUM_OF_BLOCKS_TO_APPEND; i++) {


      Block b = new Block(new BlockId(0));
      b.setBytes(content);      
      blocks[i] = b;
    }


    long startMs = System.currentTimeMillis();
    
    fs.append(blocks, false);
        
    long endMs = System.currentTimeMillis();
    
    System.out.println(endMs - startMs + "ms");

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   * @param args
   * @throws Exception
   */
  public static void main(String[] args) throws Exception {
    
    FileSystem fs = new FileSystem(Configs.getFSConfig().getRootDir());
    fs.open();
    FileSystemRegistry.register(Constants.HOST,fs);
    
    HTTPServer srv = new HTTPServer();
    srv.start();
  }

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  @Test
  public void startHTTPServerTest() throws Exception {
    
    FileSystem fs = new FileSystem("C:\\data\\jcoredb");
    fs.open();
    FileSystemRegistry.register(Constants.HOST, fs);
  
    HTTPServer.main(new String[0]);
    
    System.out.println("Press any key!");

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  }


  @Test
  public void appendTest() throws Exception {
  
    IFileSystem fs = new FileSystem(Constants.ROOT_PATH);
    fs.create(0);
    fs.open();
    
    Block b = new Block(new BlockId(0));
    byte[] content = "<test> <content> Hello world! </content> </test>".getBytes();
    b.setBytes(content);
    
    Block b2 = new Block(new BlockId(0));
    b.setBytes(content);
    
    BlockId bid = fs.append(b, false);
    BlockId bid2 = fs.append(b2, false);
    
    assertEquals(0, bid.getContainerId());
    assertEquals(0, bid.getSegmentId());
    assertEquals(0, bid.getId());
    
    assertEquals(0, bid2.getContainerId());
    assertEquals(0, bid2.getSegmentId());
    assertEquals(1, bid2.getId());
        
    fs.close();
  }

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  }
  
  @Test
  public void createTest() throws Exception
  {
    IFileSystem fs = new FileSystem(Constants.ROOT_PATH);
    
    fs.create(0);
    
    assertTrue(new File(Constants.ROOT_PATH + org.jcoredb.system.Constants.PATH_SEP + 0).exists());
    
    fs.create(Integer.MAX_VALUE);
    
    assertTrue(new File(Constants.ROOT_PATH + org.jcoredb.system.Constants.PATH_SEP + Integer.MAX_VALUE).exists());
  }

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  }
  
  @Test
  public void deleteTest() throws Exception
  {
    IFileSystem fs = new FileSystem(Constants.ROOT_PATH);
    fs.create(0);
    fs.open();
    
    ArrayList<Block> blocks = new ArrayList<Block>();
    ArrayList<BlockId> blockIds = new ArrayList<BlockId>();
    
    for (int i = 0; i < 200; i++) {


      Block b = new Block(new BlockId(0));
      byte[] content = "<test> <content> Hello world! </content> </test>".getBytes();
      b.setBytes(content);
      
      blocks.add(b);
      
      BlockId bid = fs.append(b, false);


      blockIds.add(bid);
    }


    BlockId toDelete = blockIds.get(100);
    
    fs.delete(toDelete, true);
    
    Block b = fs.read(toDelete);
    
    assertEquals(null, b);
    
    fs.close();
  }

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Related Classes of org.jcoredb.fs.impl.FileSystem

org.jcoredb.conf.FileSystemConfig

org.jcoredb.fs.Block

org.jcoredb.fs.BlockId

org.jcoredb.fs.IContainer

org.jcoredb.fs.test.FileSystemPerformanceTests

org.jcoredb.fs.test.FileSystemTests

org.jcoredb.fs.test.service.SimpleFSServerTest

org.jcoredb.service.http.HTTPServer

java.io.File

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