public static void main(String[] args) throws IOException {
ConnectionOptions options = new ConnectionOptions();
options.set(ADDRESS, "unix-box");
options.set(USERNAME, "demo");
options.set(PASSWORD, "secret");
options.set(OPERATING_SYSTEM, UNIX);
options.set(CONNECTION_TYPE, SFTP);
OverthereConnection connection = Overthere.getConnection("ssh", options);
try {
connection.execute(CmdLine.build("cp", "-r", "/var/log/apt", "/tmp/logs1"));
OverthereFile logs1 = connection.getFile("/tmp/logs1");
OverthereFile logs2 = connection.getFile("/tmp/logs2");
logs2.delete();
System.err.println("Exists #1: " + logs1.exists());
System.err.println("Exists #2: " + logs2.exists());
logs1.renameTo(logs2);
System.err.println("Exists #1: " + logs1.exists());
System.err.println("Exists #2: " + logs2.exists());
logs2.copyTo(logs1);
System.err.println("Exists #1: " + logs1.exists());
System.err.println("Exists #2: " + logs2.exists());
logs1.deleteRecursively();
logs2.deleteRecursively();
System.err.println("Exists #1: " + logs1.exists());
System.err.println("Exists #2: " + logs2.exists());
} finally {
connection.close();
}
}
private OverthereFile createConnectionTemporaryDirectory() {
OverthereFile temporaryDirectory = getFile(temporaryDirectoryPath);
Random r = new Random();
DateFormat dateFormat = new SimpleDateFormat("yyyyMMdd'T'HHmmssSSS");
String prefix = "overthere-" + dateFormat.format(new Date());
String infix = "";
String suffix = ".tmp";
for (int i = 0; i < temporaryFileCreationRetries; i++) {
OverthereFile tempDir = getFileForTempFile(temporaryDirectory, prefix + infix + suffix);
if (!tempDir.exists()) {
tempDir.mkdir();
logger.info("Created connection temporary directory {}", tempDir);
return tempDir;
}
infix = "-" + Long.toString(Math.abs(r.nextLong()));
}
throw new RuntimeIOException("Cannot create connection temporary directory on " + this);
}
/**
* Creates a reference to a temporary file on the host. This file has a unique name and will be
* automatically removed when this connection is closed. <b>N.B.:</b> The file is not actually
* created until a put method is invoked.
*
* @param prefix the prefix string to be used in generating the file's name; must be at least
* three characters long
* @param suffix the suffix string to be used in generating the file's name; may be <code>null
* </code>, in which case the suffix ".tmp" will be used
* @return a reference to the temporary file on the host
*/
@Override
public final OverthereFile getTempFile(String prefix, String suffix) throws RuntimeIOException {
if (prefix == null) throw new NullPointerException("prefix is null");
if (suffix == null) {
suffix = ".tmp";
}
Random r = new Random();
String infix = "";
for (int i = 0; i < temporaryFileCreationRetries; i++) {
OverthereFile f =
getFileForTempFile(getConnectionTemporaryDirectory(), prefix + infix + suffix);
if (!f.exists()) {
logger.debug("Created temporary file {}", f);
return f;
}
infix = "-" + Long.toString(Math.abs(r.nextLong()));
}
throw new RuntimeIOException("Cannot generate a unique temporary file name on " + this);
}
@Test
public void shouldCreateWriteReadAndRemoveTemporaryFile() throws IOException {
final String prefix = "prefix";
final String suffix = "suffix";
final byte[] contents =
("Contents of the temporary file created at "
+ System.currentTimeMillis()
+ "ms since the epoch")
.getBytes();
OverthereFile tempFile = connection.getTempFile(prefix, suffix);
assertThat(
"Expected a non-null return value from HostConnection.getTempFile()",
tempFile,
notNullValue());
assertThat(
"Expected name of temporary file to start with the prefix",
tempFile.getName(),
startsWith(prefix));
assertThat(
"Expected name of temporary file to end with the suffix",
tempFile.getName(),
endsWith(suffix));
assertThat("Expected temporary file to not exist yet", tempFile.exists(), equalTo(false));
OutputStream out = tempFile.getOutputStream();
try {
out.write(contents);
} finally {
closeQuietly(out);
}
assertThat(
"Expected temporary file to exist after writing to it", tempFile.exists(), equalTo(true));
assertThat(
"Expected temporary file to not be a directory", tempFile.isDirectory(), equalTo(false));
assertThat(
"Expected temporary file to have the size of the contents written to it",
tempFile.length(),
equalTo((long) contents.length));
assertThat("Expected temporary file to be readable", tempFile.canRead(), equalTo(true));
assertThat("Expected temporary file to be writeable", tempFile.canWrite(), equalTo(true));
// Windows systems don't support the concept of checking for executability
if (connection.getHostOperatingSystem() == OperatingSystemFamily.UNIX) {
assertFalse("Expected temporary file to not be executable", tempFile.canExecute());
}
DataInputStream in = new DataInputStream(tempFile.getInputStream());
try {
final byte[] contentsRead = new byte[contents.length];
in.readFully(contentsRead);
assertThat(
"Expected input stream to be exhausted after reading the full contents",
in.available(),
equalTo(0));
assertThat(
"Expected contents in temporary file to be identical to data written into it",
contentsRead,
equalTo(contents));
} finally {
closeQuietly(in);
}
tempFile.delete();
assertThat("Expected temporary file to no longer exist", tempFile.exists(), equalTo(false));
}
@Test
public void shouldCreatePopulateListAndRemoveTemporaryDirectory() {
final String prefix = "prefix";
final String suffix = "suffix";
OverthereFile tempDir = connection.getTempFile(prefix, suffix);
assertThat(
"Expected a non-null return value from HostConnection.getTempFile()",
tempDir,
notNullValue());
assertThat(
"Expected name of temporary file to start with the prefix",
tempDir.getName(),
startsWith(prefix));
assertThat(
"Expected name of temporary file to end with the suffix",
tempDir.getName(),
endsWith(suffix));
assertThat("Expected temporary file to not exist yet", tempDir.exists(), equalTo(false));
tempDir.mkdir();
assertThat(
"Expected temporary directory to exist after creating it", tempDir.exists(), equalTo(true));
assertThat(
"Expected temporary directory to be a directory", tempDir.isDirectory(), equalTo(true));
OverthereFile anotherTempDir = connection.getTempFile(prefix, suffix);
assertThat(
"Expected temporary directories created with identical prefix and suffix to still be different",
tempDir.getPath(),
not(equalTo(anotherTempDir.getPath())));
OverthereFile nested1 = tempDir.getFile("nested1");
OverthereFile nested2 = nested1.getFile("nested2");
OverthereFile nested3 = nested2.getFile("nested3");
assertThat("Expected deeply nested directory to not exist", nested3.exists(), equalTo(false));
try {
nested3.mkdir();
fail("Expected not to be able to create a deeply nested directory in one go");
} catch (RuntimeIOException expected1) {
}
assertThat(
"Expected deeply nested directory to still not exist", nested3.exists(), equalTo(false));
nested3.mkdirs();
assertThat(
"Expected deeply nested directory to exist after invoking mkdirs on it",
nested3.exists(),
equalTo(true));
final byte[] contents =
("Contents of the temporary file created at "
+ System.currentTimeMillis()
+ "ms since the epoch")
.getBytes();
OverthereFile regularFile = tempDir.getFile("somefile.txt");
OverthereUtils.write(contents, regularFile);
List<OverthereFile> dirContents = tempDir.listFiles();
assertThat("Expected directory to contain two entries", dirContents.size(), equalTo(2));
assertThat(
"Expected directory to contain parent of deeply nested directory",
dirContents.contains(nested1),
equalTo(true));
assertThat(
"Expected directory to contain regular file that was just created",
dirContents.contains(regularFile),
equalTo(true));
try {
nested1.delete();
} catch (RuntimeIOException expected2) {
}
nested1.deleteRecursively();
assertThat(
"Expected parent of deeply nested directory to have been removed recursively",
nested1.exists(),
equalTo(false));
regularFile.delete();
tempDir.delete();
assertThat(
"Expected temporary directory to not exist after removing it when it was empty",
tempDir.exists(),
equalTo(false));
}