// @Test
// Check the file API's
public void testFiles() throws Exception {
Path subDir1 = new Path("dir.1");
Path file1 = new Path("dir.1/foo.1");
Path file2 = new Path("dir.1/foo.2");
kosmosFileSystem.mkdirs(baseDir);
assertTrue(kosmosFileSystem.isDirectory(baseDir));
kosmosFileSystem.setWorkingDirectory(baseDir);
kosmosFileSystem.mkdirs(subDir1);
FSDataOutputStream s1 =
kosmosFileSystem.create(file1, true, 4096, (short) 1, (long) 4096, null);
FSDataOutputStream s2 =
kosmosFileSystem.create(file2, true, 4096, (short) 1, (long) 4096, null);
s1.close();
s2.close();
FileStatus[] p = kosmosFileSystem.listStatus(subDir1);
assertEquals(p.length, 2);
kosmosFileSystem.delete(file1, true);
p = kosmosFileSystem.listStatus(subDir1);
assertEquals(p.length, 1);
kosmosFileSystem.delete(file2, true);
p = kosmosFileSystem.listStatus(subDir1);
assertEquals(p.length, 0);
kosmosFileSystem.delete(baseDir, true);
assertFalse(kosmosFileSystem.exists(baseDir));
}
public FSDataOutputStream create(
Path file,
FsPermission permission,
boolean overwrite,
int bufferSize,
short replication,
long blockSize,
Progressable progress)
throws IOException {
if (exists(file)) {
if (overwrite) {
delete(file);
} else {
throw new IOException("File already exists: " + file);
}
}
Path parent = file.getParent();
if (parent != null && !mkdirs(parent)) {
throw new IOException("Mkdirs failed to create " + parent);
}
Path absolute = makeAbsolute(file);
String srep = absolute.toUri().getPath();
return kfsImpl.create(srep, replication, bufferSize);
}
// recursively delete the directory and its contents
public boolean delete(Path path, boolean recursive) throws IOException {
Path absolute = makeAbsolute(path);
String srep = absolute.toUri().getPath();
if (kfsImpl.isFile(srep)) return kfsImpl.remove(srep) == 0;
FileStatus[] dirEntries = listStatus(absolute);
if ((!recursive) && (dirEntries != null) && (dirEntries.length != 0)) {
throw new IOException("Directory " + path.toString() + " is not empty.");
}
if (dirEntries != null) {
for (int i = 0; i < dirEntries.length; i++) {
delete(new Path(absolute, dirEntries[i].getPath()), recursive);
}
}
return kfsImpl.rmdir(srep) == 0;
}
// @Test
// Check all the directory API's in KFS
public void testDirs() throws Exception {
Path subDir1 = new Path("dir.1");
// make the dir
kosmosFileSystem.mkdirs(baseDir);
assertTrue(kosmosFileSystem.isDirectory(baseDir));
kosmosFileSystem.setWorkingDirectory(baseDir);
kosmosFileSystem.mkdirs(subDir1);
assertTrue(kosmosFileSystem.isDirectory(subDir1));
assertFalse(kosmosFileSystem.exists(new Path("test1")));
assertFalse(kosmosFileSystem.isDirectory(new Path("test/dir.2")));
FileStatus[] p = kosmosFileSystem.listStatus(baseDir);
assertEquals(p.length, 1);
kosmosFileSystem.delete(baseDir, true);
assertFalse(kosmosFileSystem.exists(baseDir));
}
// @Test
// Check file/read write
public void testFileIO() throws Exception {
Path subDir1 = new Path("dir.1");
Path file1 = new Path("dir.1/foo.1");
kosmosFileSystem.mkdirs(baseDir);
assertTrue(kosmosFileSystem.isDirectory(baseDir));
kosmosFileSystem.setWorkingDirectory(baseDir);
kosmosFileSystem.mkdirs(subDir1);
FSDataOutputStream s1 =
kosmosFileSystem.create(file1, true, 4096, (short) 1, (long) 4096, null);
int bufsz = 4096;
byte[] data = new byte[bufsz];
for (int i = 0; i < data.length; i++) data[i] = (byte) (i % 16);
// write 4 bytes and read them back; read API should return a byte per call
s1.write(32);
s1.write(32);
s1.write(32);
s1.write(32);
// write some data
s1.write(data, 0, data.length);
// flush out the changes
s1.close();
// Read the stuff back and verify it is correct
FSDataInputStream s2 = kosmosFileSystem.open(file1, 4096);
int v;
long nread = 0;
v = s2.read();
assertEquals(v, 32);
v = s2.read();
assertEquals(v, 32);
v = s2.read();
assertEquals(v, 32);
v = s2.read();
assertEquals(v, 32);
assertEquals(s2.available(), data.length);
byte[] buf = new byte[bufsz];
s2.read(buf, 0, buf.length);
nread = s2.getPos();
for (int i = 0; i < data.length; i++) assertEquals(data[i], buf[i]);
assertEquals(s2.available(), 0);
s2.close();
// append some data to the file
try {
s1 = kosmosFileSystem.append(file1);
for (int i = 0; i < data.length; i++) data[i] = (byte) (i % 17);
// write the data
s1.write(data, 0, data.length);
// flush out the changes
s1.close();
// read it back and validate
s2 = kosmosFileSystem.open(file1, 4096);
s2.seek(nread);
s2.read(buf, 0, buf.length);
for (int i = 0; i < data.length; i++) assertEquals(data[i], buf[i]);
s2.close();
} catch (Exception e) {
System.out.println("append isn't supported by the underlying fs");
}
kosmosFileSystem.delete(file1, true);
assertFalse(kosmosFileSystem.exists(file1));
kosmosFileSystem.delete(subDir1, true);
assertFalse(kosmosFileSystem.exists(subDir1));
kosmosFileSystem.delete(baseDir, true);
assertFalse(kosmosFileSystem.exists(baseDir));
}