Examples with FileChannel java.nio.channels.FileChannel used on opensource projects

Example 56 with FileChannel

use of java.nio.channels.FileChannel in project jimfs by google.

the class JimfsFileChannelTest method testTruncate.

@Test
public void testTruncate() throws IOException {
    RegularFile file = regularFile(10);
    FileChannel channel = channel(file, WRITE);
    // no resize, >= size
    channel.truncate(10);
    assertEquals(10, file.size());
    // no resize, > size
    channel.truncate(11);
    assertEquals(10, file.size());
    // resize down to 5
    channel.truncate(5);
    assertEquals(5, file.size());
    channel.position(20);
    channel.truncate(10);
    assertEquals(10, channel.position());
    channel.truncate(2);
    assertEquals(2, channel.position());
}

Example 57 with FileChannel

use of java.nio.channels.FileChannel in project jimfs by google.

the class JimfsFileChannelTest method testLockNegative.

@Test
public void testLockNegative() throws IOException {
    FileChannel channel = channel(regularFile(0), READ, WRITE);
    try {
        channel.lock(-1, 10, true);
        fail();
    } catch (IllegalArgumentException expected) {
    }
    try {
        channel.lock(0, -1, true);
        fail();
    } catch (IllegalArgumentException expected) {
    }
    try {
        channel.tryLock(-1, 10, true);
        fail();
    } catch (IllegalArgumentException expected) {
    }
    try {
        channel.tryLock(0, -1, true);
        fail();
    } catch (IllegalArgumentException expected) {
    }
}

Example 58 with FileChannel

use of java.nio.channels.FileChannel in project jimfs by google.

the class JimfsFileChannelTest method testLock.

@Test
public void testLock() throws IOException {
    FileChannel channel = channel(regularFile(10), READ, WRITE);
    assertNotNull(channel.lock());
    assertNotNull(channel.lock(0, 10, false));
    assertNotNull(channel.lock(0, 10, true));
    assertNotNull(channel.tryLock());
    assertNotNull(channel.tryLock(0, 10, false));
    assertNotNull(channel.tryLock(0, 10, true));
    FileLock lock = channel.lock();
    assertTrue(lock.isValid());
    lock.release();
    assertFalse(lock.isValid());
}

Example 59 with FileChannel

use of java.nio.channels.FileChannel in project jimfs by google.

the class JimfsFileChannelTest method testFileTimeUpdates.

@Test
public void testFileTimeUpdates() throws IOException {
    RegularFile file = regularFile(10);
    FileChannel channel = new JimfsFileChannel(file, ImmutableSet.<OpenOption>of(READ, WRITE), new FileSystemState(Runnables.doNothing()));
    // accessed
    long accessTime = file.getLastAccessTime();
    Uninterruptibles.sleepUninterruptibly(2, MILLISECONDS);
    channel.read(ByteBuffer.allocate(10));
    assertNotEquals(accessTime, file.getLastAccessTime());
    accessTime = file.getLastAccessTime();
    Uninterruptibles.sleepUninterruptibly(2, MILLISECONDS);
    channel.read(ByteBuffer.allocate(10), 0);
    assertNotEquals(accessTime, file.getLastAccessTime());
    accessTime = file.getLastAccessTime();
    Uninterruptibles.sleepUninterruptibly(2, MILLISECONDS);
    channel.read(new ByteBuffer[] { ByteBuffer.allocate(10) });
    assertNotEquals(accessTime, file.getLastAccessTime());
    accessTime = file.getLastAccessTime();
    Uninterruptibles.sleepUninterruptibly(2, MILLISECONDS);
    channel.read(new ByteBuffer[] { ByteBuffer.allocate(10) }, 0, 1);
    assertNotEquals(accessTime, file.getLastAccessTime());
    accessTime = file.getLastAccessTime();
    Uninterruptibles.sleepUninterruptibly(2, MILLISECONDS);
    channel.transferTo(0, 10, new ByteBufferChannel(10));
    assertNotEquals(accessTime, file.getLastAccessTime());
    // modified
    long modifiedTime = file.getLastModifiedTime();
    Uninterruptibles.sleepUninterruptibly(2, MILLISECONDS);
    channel.write(ByteBuffer.allocate(10));
    assertNotEquals(modifiedTime, file.getLastModifiedTime());
    modifiedTime = file.getLastModifiedTime();
    Uninterruptibles.sleepUninterruptibly(2, MILLISECONDS);
    channel.write(ByteBuffer.allocate(10), 0);
    assertNotEquals(modifiedTime, file.getLastModifiedTime());
    modifiedTime = file.getLastModifiedTime();
    Uninterruptibles.sleepUninterruptibly(2, MILLISECONDS);
    channel.write(new ByteBuffer[] { ByteBuffer.allocate(10) });
    assertNotEquals(modifiedTime, file.getLastModifiedTime());
    modifiedTime = file.getLastModifiedTime();
    Uninterruptibles.sleepUninterruptibly(2, MILLISECONDS);
    channel.write(new ByteBuffer[] { ByteBuffer.allocate(10) }, 0, 1);
    assertNotEquals(modifiedTime, file.getLastModifiedTime());
    modifiedTime = file.getLastModifiedTime();
    Uninterruptibles.sleepUninterruptibly(2, MILLISECONDS);
    channel.truncate(0);
    assertNotEquals(modifiedTime, file.getLastModifiedTime());
    modifiedTime = file.getLastModifiedTime();
    Uninterruptibles.sleepUninterruptibly(2, MILLISECONDS);
    channel.transferFrom(new ByteBufferChannel(10), 0, 10);
    assertNotEquals(modifiedTime, file.getLastModifiedTime());
}

Example 60 with FileChannel

use of java.nio.channels.FileChannel in project jimfs by google.

the class JimfsFileChannelTest method testTruncateNegative.

@Test
public void testTruncateNegative() throws IOException {
    FileChannel channel = channel(regularFile(0), READ, WRITE);
    try {
        channel.truncate(-1);
        fail();
    } catch (IllegalArgumentException expected) {
    }
}