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[BAEL-3601] - Fix code review comments.

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This commit is contained in:
Philippe Soares
2020-02-09 00:49:26 -05:00
parent e94f0ad2f1
commit 696e4943df
14 changed files with 156 additions and 520 deletions
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core-java-modules/core-java-nio-2/README.md
+1 -2
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@@ -8,5 +8,4 @@ This module contains articles about core Java non-blocking input and output (IO)
- [Create a Symbolic Link with Java](https://www.baeldung.com/java-symlink)
- [Introduction to the Java NIO Selector](https://www.baeldung.com/java-nio-selector)
- [Using Java MappedByteBuffer](https://www.baeldung.com/java-mapped-byte-buffer)
- [How to Lock a File in Java](https://www.baeldung.com/how-to-lock-a-file-in-java)
- [[<-- Prev]](/core-java-modules/core-java-nio)
- [[<-- Prev]](/core-java-modules/core-java-nio)
core-java-modules/core-java-nio-2/src/main/java/com/baeldung/lock/FileLocks.java
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core-java-modules/core-java-nio-2/src/test/java/com/baeldung/lock/FileLocksTest.java
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@@ -1,87 +0,0 @@
package com.baeldung.lock;
import static org.junit.Assert.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;
import java.io.IOException;
import java.nio.channels.FileLock;
import java.nio.channels.NonReadableChannelException;
import java.nio.channels.NonWritableChannelException;
import org.junit.jupiter.api.Test;
class FileLocksTest {
// Exclusive locks
/**
* Getting an exclusive (write) lock on the entire file.
* Fails when getting the lock from a FileChannel obtained through a FileInputStream.
*/
@Test
void givenAnInputStream_whenGetWriteLock_throwNonWritableChannelException() {
assertThrows(NonWritableChannelException.class,
() -> FileLocks.getExclusiveLockFromInputStream());
}
/**
* Getting an exclusive lock from a RandomAccessFile
* @throws IOException
*/
@Test
void givenARandomAccessFileWithReadWriteAccess_whenGetWriteLock_lock() throws IOException {
FileLock lock = FileLocks.getExclusiveLockFromRandomAccessFile(0, 10);
assertNotNull(lock);
assertFalse(lock.isShared());
}
/**
* Getting an exclusive lock from FileChannel::open
* @throws IOException
*/
@Test
void givenAPath_whenGetExclusiveLock_lock() throws IOException {
FileLock lock = FileLocks.getExclusiveLockFromFileChannelOpen(0, 10);
assertNotNull(lock);
assertFalse(lock.isShared());
}
// Shared locks
/**
* Getting a shared (read) lock on the entire file.
* Fails when getting the lock from a FileChannel obtained through a FileOutputStream.
*/
@Test
void givenAFileOutputStream_whenGetSharedLock_throwNonReadableChannelException() {
assertThrows(NonReadableChannelException.class,
() -> FileLocks.getReadLockFromOutputStream(0, 10));
}
/**
* Getting a shared (read) lock works fine when getting the lock from a FileChannel obtained through a FileInputStream.
* @throws IOException
*/
@Test
void givenAnInputStream_whenGetSharedLock_lock() throws IOException {
FileLock lock = FileLocks.getReadLockFromInputStream(0, 10);
assertNotNull(lock);
assertTrue(lock.isShared());
}
/**
* Getting a shared lock from a RandomAccessFile
* @throws IOException
*/
@Test
void givenARandomAccessFile_whenGetSharedLock_lock() throws IOException {
FileLock lock = FileLocks.getReadLockFromRandomAccessFile(0, 10);
assertNotNull(lock);
assertTrue(lock.isShared());
}
}
core-java-modules/core-java-nio-2/src/test/java/com/baeldung/lock/FileLocksUnitTest.java
+48
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@@ -0,0 +1,48 @@
package com.baeldung.lock;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;
import java.io.IOException;
import java.nio.channels.FileLock;
import java.nio.channels.NonReadableChannelException;
import java.nio.channels.NonWritableChannelException;
import org.junit.jupiter.api.Test;
class FileLocksUnitTest {
@Test void givenAnInputStream_whenGetWriteLock_throwNonWritableChannelException() {
assertThrows(NonWritableChannelException.class, () -> FileLocks.getExclusiveLockFromInputStream());
}
@Test void givenARandomAccessFileWithReadWriteAccess_whenGetWriteLock_lock() throws IOException {
FileLock lock = FileLocks.getExclusiveLockFromRandomAccessFile(0, 10);
assertNotNull(lock);
assertFalse(lock.isShared());
}
@Test void givenAPath_whenGetExclusiveLock_lock() throws IOException {
FileLock lock = FileLocks.getExclusiveLockFromFileChannelOpen(0, 10);
assertNotNull(lock);
assertFalse(lock.isShared());
}
@Test void givenAFileOutputStream_whenGetSharedLock_throwNonReadableChannelException() {
assertThrows(NonReadableChannelException.class, FileLocks::getReadLockFromOutputStream);
}
@Test void givenAnInputStream_whenGetSharedLock_lock() throws IOException {
FileLock lock = FileLocks.getReadLockFromInputStream(0, 10);
assertNotNull(lock);
assertTrue(lock.isShared());
}
@Test void givenARandomAccessFile_whenGetSharedLock_lock() throws IOException {
FileLock lock = FileLocks.getReadLockFromRandomAccessFile(0, 10);
assertNotNull(lock);
assertTrue(lock.isShared());
}
}