| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.apache.datasketches.memory; |
| |
| import java.io.File; |
| |
| /** |
| * Allocates direct memory used to memory map files for write operations |
| * (including those > 2GB). |
| * |
| * @author Lee Rhodes |
| * @author Roman Leventov |
| * @author Praveenkumar Venkatesan |
| */ |
| //Called from WritableMemory, implements combo of WritableMemory with WritableMap resource |
| final class AllocateDirectWritableMap extends AllocateDirectMap implements WritableMap { |
| |
| AllocateDirectWritableMap(final File file, final long fileOffsetBytes, |
| final long capacityBytes, final boolean localReadOnly) { |
| super(file, fileOffsetBytes, capacityBytes, localReadOnly); |
| } |
| |
| @Override |
| public void force() { |
| if (resourceReadOnly) { |
| throw new ReadOnlyException("Memory Mapped File is Read Only."); |
| } |
| try { |
| MAPPED_BYTE_BUFFER_FORCE0_METHOD |
| //force0 is effectively static, so ZERO_READ_ONLY_DIRECT_BYTE_BUFFER is not modified |
| .invoke(AccessByteBuffer.ZERO_READ_ONLY_DIRECT_BYTE_BUFFER, |
| raf.getFD(), |
| nativeBaseOffset, |
| capacityBytes); |
| } catch (final Exception e) { |
| throw new RuntimeException(String.format("Encountered %s exception in force. " |
| + e.getClass())); |
| } |
| } |
| } |