Package be.bagofwords.db

Examples of be.bagofwords.db.DataInterface

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        }
        factory.close();
    }

    private void testSeparateWritingReading(DataType dataType, DataInterfaceFactory factory, DatabaseCachingType cachingType, File largeTextFile, int numberOfThreads, long numberOfItems) throws FileNotFoundException, InterruptedException {
        final DataInterface dataInterface = createDataInterface(dataType, cachingType, factory);
        dataInterface.dropAllData();
        final BufferedReader rdr = new BufferedReader(new FileReader(largeTextFile));

        //write data
        MutableLong numberOfItemsWritten = new MutableLong(0);
        CountDownLatch writeLatch = new CountDownLatch(numberOfThreads);
        long startOfWrite = System.nanoTime();
        for (int i = 0; i < numberOfThreads; i++) {
            new BigramTestsThread(dataType, numberOfItemsWritten, numberOfItems, rdr, dataInterface, writeLatch, false).start();
        }
        writeLatch.await();
        dataInterface.flush();
        long endOfWrite = System.nanoTime();
        double writesPerSecond = numberOfItemsWritten.longValue() * 1e9 / (endOfWrite - startOfWrite);

        //read data (we don't read more then 200M of items, since this is plenty to get an accurate estimate of reading speed)
        dataInterface.optimizeForReading();
        MutableLong numberOfItemsRead = new MutableLong(0);
        CountDownLatch readLatch = new CountDownLatch(numberOfThreads);
        long startOfRead = System.nanoTime();
        for (int i = 0; i < numberOfThreads; i++) {
            new BigramTestsThread(dataType, numberOfItemsRead, Math.min(200 * 1024 * 1024, numberOfItems), rdr, dataInterface, readLatch, true).start();
        }
        readLatch.await();
        dataInterface.flush();
        long endOfRead = System.nanoTime();
        double readsPerSecond = numberOfItemsRead.longValue() * 1e9 / (endOfRead - startOfRead);

        dataInterface.close();
        UI.write(factory.getClass().getSimpleName() + " threads " + numberOfThreads + " items " + numberOfItems + " write " + NumUtils.fmt(writesPerSecond) + " read " + NumUtils.fmt(readsPerSecond));
    }
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        }
        factory.close();
    }

    private void testMixedWritingReading(DataType dataType, DataInterfaceFactory factory, DatabaseCachingType cachingType, File largeTextFile, int numberOfThreads, long numberOfItems) throws FileNotFoundException, InterruptedException {
        final DataInterface dataInterface = createDataInterface(dataType, cachingType, factory);
        dataInterface.dropAllData();
        final BufferedReader rdr = new BufferedReader(new FileReader(largeTextFile));

        //first fill database by writing data
        MutableLong numberOfItemsWritten = new MutableLong(0);
        CountDownLatch writeLatch = new CountDownLatch(numberOfThreads);
        for (int i = 0; i < numberOfThreads; i++) {
            new BigramTestsThread(dataType, numberOfItemsWritten, numberOfItems, rdr, dataInterface, writeLatch, false).start();
        }
        writeLatch.await();
        dataInterface.flush();

        //now start threads that will write and read data simultaneously
        dataInterface.optimizeForReading();
        MutableLong numberOfItemsRead = new MutableLong(0);
        numberOfItemsWritten = new MutableLong(0);
        CountDownLatch readLatch = new CountDownLatch(numberOfThreads / 2);
        writeLatch = new CountDownLatch(numberOfThreads / 2);
        long start = System.nanoTime();
        for (int i = 0; i < numberOfThreads; i++) {
            boolean isReadThread = i % 2 == 0;
            new BigramTestsThread(dataType, isReadThread ? numberOfItemsRead : numberOfItemsWritten, Math.min(100 * 1024 * 1024, numberOfItems), rdr, dataInterface, isReadThread ? readLatch : writeLatch, isReadThread).start();
        }
        readLatch.await(); //this assumes that reading data is faster than writing data.
        long endOfRead = System.nanoTime();
        writeLatch.await();
        dataInterface.flush();
        long endOfWrite = System.nanoTime();
        double readsPerSecond = numberOfItemsRead.longValue() * 1e9 / (endOfRead - start);
        double writesPerSecond = numberOfItemsWritten.longValue() * 1e9 / (endOfWrite - start);

        dataInterface.close();
        UI.write(factory.getClass().getSimpleName() + " threads " + numberOfThreads + " items " + numberOfItems + " write " + NumUtils.fmt(writesPerSecond) + " read " + NumUtils.fmt(readsPerSecond));
    }
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        }
        factory.close();
    }

    private void testBatchWritingAndReading(DataInterfaceFactory factory, DatabaseCachingType cachingType, int numberOfThreads, final long numberOfItems) throws FileNotFoundException, InterruptedException {
        final DataInterface dataInterface = createDataInterface(cachingType, factory);
        dataInterface.dropAllData();

        MutableLong numberOfItemsWritten = new MutableLong(0);
        long startOfWrite = System.nanoTime();
        CountDownLatch countDownLatch = new CountDownLatch(numberOfThreads);
        for (int i = 0; i < numberOfThreads; i++) {
            new UniformDataTestsThread(numberOfItemsWritten, numberOfItems, dataInterface, countDownLatch, true).start();
        }
        countDownLatch.await();
        dataInterface.flush();
        long endOfWrite = System.nanoTime();
        double writesPerSecond = numberOfItemsWritten.longValue() * 1e9 / (endOfWrite - startOfWrite);

        countDownLatch = new CountDownLatch(numberOfThreads);
        dataInterface.optimizeForReading();
        MutableLong numberOfItemsRead = new MutableLong(0);
        long startOfRead = System.nanoTime();
        for (int i = 0; i < numberOfThreads; i++) {
            new UniformDataTestsThread(numberOfItemsRead, numberOfItems, dataInterface, countDownLatch, false).start();
        }
        countDownLatch.await();
        long endOfRead = System.nanoTime();
        double readsPerSecond = numberOfItemsRead.longValue() * 1e9 / (endOfRead - startOfRead);

        UI.write(factory.getClass().getSimpleName() + " threads " + numberOfThreads + " items " + numberOfItems + " write " + NumUtils.fmt(writesPerSecond) + " read " + NumUtils.fmt(readsPerSecond));
        dataInterface.close();
    }
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                } catch (IOException e) {
                    throw new RuntimeException("Unexpected exception while starting changedValueListenerThread", e);
                }
            }
        }
        DataInterface result = new RemoteDataInterface<>(nameOfSubset, objectClass, combinator, host, port);
        dataInterfaceMap.put(nameOfSubset, result);
        return result;
    }
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                    int numOfKeys = connection.readInt();
                    long[] keys = new long[numOfKeys];
                    for (int i = 0; i < numOfKeys; i++) {
                        keys[i] = connection.readLong();
                    }
                    DataInterface dataInterface = dataInterfaceMap.get(interfaceName);
                    if (dataInterface != null) {
                        dataInterface.notifyListenersOfChangedValues(keys);
                    }
                    connection.writeLong(LONG_OK);
                    connection.flush();
                }
            } catch (SocketException exp) {
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Related Classes of be.bagofwords.db.DataInterface

  • be.bagofwords.db.remote.RemoteDatabaseInterfaceFactory
  • be.bagofwords.db.remote.RemoteDatabaseInterfaceFactory$ChangedValueListenerThread
  • be.bagofwords.main.tests.bigrams.BigramTestsMain
  • be.bagofwords.main.tests.uniform.UniformDataTestsMain
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