| /* |
| * 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.ignite.internal.fileio; |
| |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import java.util.concurrent.TimeUnit; |
| |
| /** |
| * Abstract {@link FileIo}. |
| */ |
| public abstract class AbstractFileIo implements FileIo { |
| /** Max io timeout milliseconds. */ |
| private static final int MAX_IO_TIMEOUT_MS = 2000; |
| |
| /** {@inheritDoc} */ |
| @Override |
| public int readFully(final ByteBuffer destBuf) throws IOException { |
| return fully(offs -> read(destBuf), position(), destBuf.remaining(), false); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public int readFully(final ByteBuffer destBuf, final long position) throws IOException { |
| return fully(offs -> read(destBuf, position + offs), position, destBuf.remaining(), false); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public int readFully(final byte[] buf, final int off, final int len) throws IOException { |
| return fully(offs -> read(buf, off + offs, len - offs), position(), len, false); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public int writeFully(final ByteBuffer srcBuf) throws IOException { |
| return fully(offs -> write(srcBuf), position(), srcBuf.remaining(), true); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public int writeFully(final ByteBuffer srcBuf, final long position) throws IOException { |
| return fully(offs -> write(srcBuf, position + offs), position, srcBuf.remaining(), true); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public int writeFully(final byte[] buf, final int off, final int len) throws IOException { |
| return fully(offs -> write(buf, off + offs, len - offs), position(), len, true); |
| } |
| |
| /** |
| * I/O operation. |
| */ |
| private interface IoOperation { |
| /** |
| * Returns number of bytes operated. |
| * |
| * @param offs Offset. |
| * @throws IOException If some I/O error occurs. |
| */ |
| int run(int offs) throws IOException; |
| } |
| |
| /** |
| * Returns available bytes. |
| * |
| * @param requested Requested bytes. |
| * @param position File position. |
| * @throws IOException If some I/O error occurs. |
| */ |
| private int available(int requested, long position) throws IOException { |
| long available = size() - position; |
| |
| return requested > available ? (int) available : requested; |
| } |
| |
| /** |
| * Returns number of written/read bytes. |
| * |
| * @param operation IO operation. |
| * @param position File position. |
| * @param num Number of bytes to operate. |
| * @param write {@code True} if writing to file. |
| * @throws IOException If some I/O error occurs. |
| */ |
| private int fully(IoOperation operation, long position, int num, boolean write) throws IOException { |
| if (num > 0) { |
| long time = 0; |
| |
| for (int i = 0; i < num; ) { |
| int n = operation.run(i); |
| |
| if (n > 0) { |
| i += n; |
| time = 0; |
| } else if (n == 0 || i > 0) { |
| if (!write && available(num - i, position + i) == 0) { |
| return i; |
| } |
| |
| if (time == 0) { |
| time = System.nanoTime(); |
| } else if ((System.nanoTime() - time) >= TimeUnit.MILLISECONDS.toNanos(MAX_IO_TIMEOUT_MS)) { |
| throw new IOException(write && (position + i) == size() ? "Failed to extend file." : |
| "Probably disk is too busy, please check your device."); |
| } |
| } else { |
| return -1; |
| } |
| } |
| } |
| |
| return num; |
| } |
| } |