org.apache.brooklyn.util.io.FileUtil Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of brooklyn-utils-common Show documentation
Show all versions of brooklyn-utils-common Show documentation
Utility classes and methods developed for Brooklyn but not dependendent on Brooklyn or much else
/*
* 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.brooklyn.util.io;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.List;
import org.apache.brooklyn.util.exceptions.Exceptions;
import org.apache.brooklyn.util.guava.Maybe;
import org.apache.brooklyn.util.os.Os;
import org.apache.brooklyn.util.stream.StreamGobbler;
import org.apache.brooklyn.util.stream.Streams;
import org.apache.commons.io.FileUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.annotations.Beta;
import com.google.common.collect.ImmutableList;
public class FileUtil {
private static final Logger LOG = LoggerFactory.getLogger(FileUtil.class);
private static boolean loggedSetFilePermissionsWarning = false;
private static final FilePermissions permissions600 = new FilePermissions(0600);
private static final FilePermissions permissions700 = new FilePermissions(0700);
public static void setFilePermissionsTo700(File file) throws IOException {
createNewFile(file);
try {
permissions700.apply(file);
if (LOG.isTraceEnabled()) LOG.trace("Set permissions to 700 for file {}", file.getAbsolutePath());
} catch (IOException ex) {
logSetFilePermissionsFailure("700", file, ex);
}
}
public static void setFilePermissionsTo600(File file) throws IOException {
createNewFile(file);
try {
permissions600.apply(file);
if (LOG.isTraceEnabled()) LOG.trace("Set permissions to 600 for file {}", file.getAbsolutePath());
} catch (IOException ex) {
logSetFilePermissionsFailure("600", file, ex);
}
}
private static void logSetFilePermissionsFailure(final String permissions, File file, IOException ex) {
if (loggedSetFilePermissionsWarning) {
if (LOG.isTraceEnabled()) LOG.trace("Failed to set permissions to {} for file {}: {}",
new Object[] {permissions, file.getAbsolutePath(), ex});
} else {
if (Os.isMicrosoftWindows()) {
if (LOG.isDebugEnabled()) LOG.debug("Failed to set permissions to {} for file {}; expected behaviour on Windows; {}; subsequent failures (on any file) will be logged at trace",
new Object[] {permissions, file.getAbsolutePath(), ex});
} else {
LOG.warn("Failed to set permissions to {} for file {}: {}; subsequent failures (on any file) will be logged at trace",
new Object[] {permissions, file.getAbsolutePath(), ex});
}
loggedSetFilePermissionsWarning = true;
}
}
public static void moveDir(File srcDir, File destDir) throws IOException, InterruptedException {
if (!Os.isMicrosoftWindows()) {
String cmd = "mv '"+srcDir.getAbsolutePath()+"' '"+destDir.getAbsolutePath()+"'";
Process proc = Runtime.getRuntime().exec(cmd);
proc.waitFor();
if (proc.exitValue() == 0) return;
}
FileUtils.moveDirectory(srcDir, destDir);
}
public static void copyDir(File srcDir, File destDir) throws IOException, InterruptedException {
if (!Os.isMicrosoftWindows()) {
String cmd = "cp -R '"+srcDir.getAbsolutePath()+"' '"+destDir.getAbsolutePath()+"'";
Process proc = Runtime.getRuntime().exec(cmd);
proc.waitFor();
if (proc.exitValue() == 0) return;
}
FileUtils.copyDirectory(srcDir, destDir);
}
/**
* This utility will be deleted when we move to Java 7
*
* @return The file permission (in a form like "-rwxr--r--"), or null if the permissions could not be determined.
*/
@Beta
public static Maybe getFilePermissions(File file) {
if (!file.exists()) return Maybe.absent("File "+file+" does not exist");
if (Os.isMicrosoftWindows()) {
return Maybe.absent("Cannot determine permissions on windows");
} else {
ByteArrayOutputStream out = new ByteArrayOutputStream();
ByteArrayOutputStream err = new ByteArrayOutputStream();
int exitcode = exec(ImmutableList.of("ls", "-ld", file.getAbsolutePath()), out, err);
if (exitcode != 0) {
if (LOG.isDebugEnabled()) LOG.debug("Could not determine permissions of file "+file+"; exit code "+exitcode+"; stderr "+new String(err.toByteArray()));
return Maybe.absent("Could not determine permission of file "+file+"; exit code "+exitcode);
}
String stdout = new String(out.toByteArray());
return (stdout.trim().isEmpty() ? Maybe.absent("empty output") : Maybe.of(stdout.split("\\s")[0]));
}
}
// guava's Files.copy(InputStreamSupplier, File) is deprecated, and will be deleted in guava 18.0
@Beta
public static void copyTo(InputStream in, File dest) {
FileOutputStream out = null;
try {
out = new FileOutputStream(dest);
Streams.copy(in, out);
} catch (FileNotFoundException e) {
throw Exceptions.propagate(e);
} finally {
Streams.closeQuietly(out);
}
}
private static int exec(List cmds, OutputStream out, OutputStream err) {
StreamGobbler errgobbler = null;
StreamGobbler outgobbler = null;
ProcessBuilder pb = new ProcessBuilder(cmds);
try {
Process p = pb.start();
if (out != null) {
InputStream outstream = p.getInputStream();
outgobbler = new StreamGobbler(outstream, out, (Logger) null);
outgobbler.start();
}
if (err != null) {
InputStream errstream = p.getErrorStream();
errgobbler = new StreamGobbler(errstream, err, (Logger) null);
errgobbler.start();
}
int result = p.waitFor();
if (outgobbler != null) outgobbler.blockUntilFinished();
if (errgobbler != null) errgobbler.blockUntilFinished();
return result;
} catch (Exception e) {
throw Exceptions.propagate(e);
} finally {
Streams.closeQuietly(outgobbler);
Streams.closeQuietly(errgobbler);
}
}
private static boolean createNewFile(File file) throws IOException {
if (!file.getParentFile().exists()) {
file.getParentFile().mkdirs();
}
return file.createNewFile();
}
/**
* Recursively delete a directory.
*
* Any IOException that might be raised is logged and not thrown.
*
* @param file The directory to be deleted
*/
public static void deleteDirectory(final File file) {
if (file != null) {
try {
FileUtils.deleteDirectory(file);
} catch (IOException e) {
LOG.warn(e.getMessage());
}
}
}
}