Examples with BlockLogBuffer org.neo4j.com.BlockLogBuffer used on opensource projects

Example 6 with BlockLogBuffer

use of org.neo4j.com.BlockLogBuffer in project neo4j by neo4j.

the class ToNetworkStoreWriter method write.

@Override
public long write(String path, ReadableByteChannel data, ByteBuffer temporaryBuffer, boolean hasData, int requiredElementAlignment) throws IOException {
    char[] chars = path.toCharArray();
    targetBuffer.writeShort(chars.length);
    Protocol.writeChars(targetBuffer, chars);
    targetBuffer.writeByte(hasData ? 1 : 0);
    // TODO Make use of temporaryBuffer?
    BlockLogBuffer buffer = new BlockLogBuffer(targetBuffer, bufferMonitor);
    long totalWritten = Short.BYTES + chars.length * Character.BYTES + Byte.BYTES;
    if (hasData) {
        targetBuffer.writeInt(requiredElementAlignment);
        totalWritten += Integer.BYTES;
        totalWritten += buffer.write(data);
        buffer.close();
    }
    return totalWritten;
}

Example 7 with BlockLogBuffer

use of org.neo4j.com.BlockLogBuffer in project neo4j by neo4j.

the class TestBlockLogBuffer method readOnlyOneFullBlock.

@Test
public void readOnlyOneFullBlock() throws Exception {
    byte[] bytes = new byte[256];
    ChannelBuffer wrappedBuffer = ChannelBuffers.wrappedBuffer(bytes);
    wrappedBuffer.resetWriterIndex();
    BlockLogBuffer buffer = new BlockLogBuffer(wrappedBuffer, new Monitors().newMonitor(ByteCounterMonitor.class));
    byte[] bytesValue = new byte[255];
    bytesValue[0] = 1;
    bytesValue[254] = -1;
    buffer.put(bytesValue, bytesValue.length);
    buffer.close();
    ReadableByteChannel reader = new BlockLogReader(wrappedBuffer);
    ByteBuffer verificationBuffer = ByteBuffer.wrap(new byte[1000]);
    reader.read(verificationBuffer);
    verificationBuffer.flip();
    byte[] actualBytes = new byte[bytesValue.length];
    verificationBuffer.get(actualBytes);
    assertThat(actualBytes, new ArrayMatches<byte[]>(bytesValue));
}

Example 8 with BlockLogBuffer

use of org.neo4j.com.BlockLogBuffer in project neo4j by neo4j.

the class TestBlockLogBuffer method canReaderReallyLargeByteArray.

@Test
public void canReaderReallyLargeByteArray() throws Exception {
    byte[] bytes = new byte[650];
    ChannelBuffer wrappedBuffer = ChannelBuffers.wrappedBuffer(bytes);
    wrappedBuffer.resetWriterIndex();
    BlockLogBuffer buffer = new BlockLogBuffer(wrappedBuffer, new Monitors().newMonitor(ByteCounterMonitor.class));
    byte[] bytesValue = new byte[600];
    bytesValue[1] = 1;
    bytesValue[99] = 2;
    bytesValue[199] = 3;
    bytesValue[299] = 4;
    bytesValue[399] = 5;
    bytesValue[499] = 6;
    bytesValue[599] = 7;
    buffer.put(bytesValue, bytesValue.length);
    buffer.close();
    byte[] actual;
    BlockLogReader reader = new BlockLogReader(wrappedBuffer);
    ByteBuffer verificationBuffer = ByteBuffer.wrap(new byte[1000]);
    reader.read(verificationBuffer);
    verificationBuffer.flip();
    actual = new byte[255];
    verificationBuffer.get(actual);
    assertThat(actual, new ArrayMatches<byte[]>(Arrays.copyOfRange(bytesValue, 0, 255)));
    actual = new byte[255];
    verificationBuffer.get(actual);
    assertThat(actual, new ArrayMatches<byte[]>(Arrays.copyOfRange(bytesValue, 255, 510)));
    actual = new byte[90];
    verificationBuffer.get(actual);
    assertThat(actual, new ArrayMatches<byte[]>(Arrays.copyOfRange(bytesValue, 510, 600)));
}

Example 9 with BlockLogBuffer

use of org.neo4j.com.BlockLogBuffer in project neo4j by neo4j.

the class TestBlockLogBuffer method onlyOneFullBlock.

@Test
public void onlyOneFullBlock() throws Exception {
    byte[] bytes = new byte[256];
    ChannelBuffer wrappedBuffer = ChannelBuffers.wrappedBuffer(bytes);
    wrappedBuffer.resetWriterIndex();
    BlockLogBuffer buffer = new BlockLogBuffer(wrappedBuffer, new Monitors().newMonitor(ByteCounterMonitor.class));
    byte[] bytesValue = new byte[255];
    bytesValue[0] = 1;
    bytesValue[254] = -1;
    buffer.put(bytesValue, bytesValue.length);
    buffer.close();
    ByteBuffer verificationBuffer = ByteBuffer.wrap(bytes);
    assertEquals((byte) 255, verificationBuffer.get());
    byte[] actualBytes = new byte[bytesValue.length];
    verificationBuffer.get(actualBytes);
    assertThat(actualBytes, new ArrayMatches<byte[]>(bytesValue));
}

Example 10 with BlockLogBuffer

use of org.neo4j.com.BlockLogBuffer in project neo4j by neo4j.

the class TestBlockLogBuffer method readOnlyOneNonFullBlock.

@Test
public void readOnlyOneNonFullBlock() throws IOException {
    byte[] bytes = new byte[255];
    ChannelBuffer wrappedBuffer = ChannelBuffers.wrappedBuffer(bytes);
    wrappedBuffer.resetWriterIndex();
    BlockLogBuffer buffer = new BlockLogBuffer(wrappedBuffer, new Monitors().newMonitor(ByteCounterMonitor.class));
    byte byteValue = 5;
    int intValue = 1234;
    long longValue = 574853;
    float floatValue = 304985.5f;
    double doubleValue = 48493.22d;
    final byte[] bytesValue = new byte[] { 1, 5, 2, 6, 3 };
    buffer.put(byteValue);
    buffer.putInt(intValue);
    buffer.putLong(longValue);
    buffer.putFloat(floatValue);
    buffer.putDouble(doubleValue);
    buffer.put(bytesValue, bytesValue.length);
    buffer.close();
    ReadableByteChannel reader = new BlockLogReader(wrappedBuffer);
    ByteBuffer verificationBuffer = ByteBuffer.wrap(new byte[1000]);
    reader.read(verificationBuffer);
    verificationBuffer.flip();
    assertEquals(byteValue, verificationBuffer.get());
    assertEquals(intValue, verificationBuffer.getInt());
    assertEquals(longValue, verificationBuffer.getLong());
    assertEquals(floatValue, verificationBuffer.getFloat(), 0.0);
    assertEquals(doubleValue, verificationBuffer.getDouble(), 0.0);
    byte[] actualBytes = new byte[bytesValue.length];
    verificationBuffer.get(actualBytes);
    assertThat(actualBytes, new ArrayMatches<byte[]>(bytesValue));
}