Examples of org.teiid.common.buffer.impl.BufferManagerImpl

org.teiid.common.buffer.impl.BufferManagerImpl

Default implementation of BufferManager.
Responsible for creating/tracking TupleBuffers and providing access to the StorageManager.
The buffering strategy attempts to purge batches from the least recently used TupleBuffer from before (which wraps around circularly) the last used batch. This attempts to compensate for our tendency to read buffers in a forward manner. If our processing algorithms are changed to use alternating ascending/descending access, then the buffering approach could be replaced with a simple LRU. TODO: allow for cached stores to use lru - (result set/mat view) TODO: account for row/content based sizing (difficult given value sharing) TODO: account for memory based lobs (it would be nice if the approximate buffer size matched at 100kB) TODO: add detection of pinned batches to prevent unnecessary purging of non-persistent batches - this is not necessary for already persistent batches, since we hold a weak reference


        return INSTANCE;
    }


  public static BufferManagerImpl createBufferManager() {
    BufferManagerImpl bufferMgr = new BufferManagerImpl();
    try {
      bufferMgr.initialize();
    } catch (TeiidComponentException e) {
      throw new RuntimeException(e);
    }


    // Add unmanaged memory storage manager
    bufferMgr.setStorageManager(new MemoryStorageManager());
    return bufferMgr;
  }

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public class TestLobManager {


  @Test
  public void testLobPeristence() throws Exception{
    
    BufferManagerImpl buffMgr = BufferManagerFactory.createBufferManager();
    FileStore fs = buffMgr.createFileStore("temp");
    
    ClobType clob = new ClobType(new ClobImpl(new InputStreamFactory() {
      @Override
      public InputStream getInputStream() throws IOException {
        return new ReaderInputStream(new StringReader("Clob contents One"),  Charset.forName(Streamable.ENCODING));

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    }
        
    public static void doProcess(ProcessorPlan plan, ProcessorDataManager dataManager, List[] expectedResults, CommandContext context) throws Exception {
      BufferManager bufferMgr = context.getBufferManager();
      if (bufferMgr == null) {
          BufferManagerImpl bm = BufferManagerFactory.createBufferManager();
          bm.setProcessorBatchSize(context.getProcessorBatchSize());
          bm.setConnectorBatchSize(context.getProcessorBatchSize());
          context.setBufferManager(bm);
          bufferMgr = bm;
      }
      context.getNextRand(0);
        if (context.getTempTableStore() == null) {

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Related Classes of org.teiid.common.buffer.impl.BufferManagerImpl

org.teiid.common.buffer.BatchManager

org.teiid.common.buffer.BufferManagerFactory

org.teiid.common.buffer.FileStore

org.teiid.common.buffer.LobManager

org.teiid.common.buffer.STree

org.teiid.common.buffer.TestLobManager

org.teiid.common.buffer.TestSTree

org.teiid.common.buffer.TupleBatch

org.teiid.common.buffer.TupleBuffer

org.teiid.dqp.service.buffer.TestLocalBufferService

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