[commons-vfs] 02/03: Synchronized methods that read or write the thread-unsafe instance variable of type SftpATTRS.

[ggregory]

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ggregory pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/commons-vfs.git

commit d6b7eff01c6aff3adf4e62af8c6149b2eb4ec22f
Author: Gary Gregory <garydgreg...@gmail.com>
AuthorDate: Thu Jul 15 16:15:48 2021 -0400

    Synchronized methods that read or write the thread-unsafe instance
    variable of type SftpATTRS.
---
 .../commons/vfs2/provider/sftp/SftpFileObject.java | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git 
a/commons-vfs2/src/main/java/org/apache/commons/vfs2/provider/sftp/SftpFileObject.java
 
b/commons-vfs2/src/main/java/org/apache/commons/vfs2/provider/sftp/SftpFileObject.java
index 43c17be..7cec9ad 100644
--- 
a/commons-vfs2/src/main/java/org/apache/commons/vfs2/provider/sftp/SftpFileObject.java
+++ 
b/commons-vfs2/src/main/java/org/apache/commons/vfs2/provider/sftp/SftpFileObject.java
@@ -138,7 +138,7 @@ public class SftpFileObject extends 
AbstractFileObject<SftpFileSystem> {
 
     /** @since 2.0 */
     @Override
-    protected void doDetach() throws Exception {
+    protected synchronized void doDetach() throws Exception {
         attrs = null;
     }
 
@@ -146,7 +146,7 @@ public class SftpFileObject extends 
AbstractFileObject<SftpFileSystem> {
      * Returns the size of the file content (in bytes).
      */
     @Override
-    protected long doGetContentSize() throws Exception {
+    protected synchronized long doGetContentSize() throws Exception {
         if (attrs == null || (attrs.getFlags() & 
SftpATTRS.SSH_FILEXFER_ATTR_SIZE) == 0) {
             throw new 
FileSystemException("vfs.provider.sftp/unknown-size.error");
         }
@@ -200,7 +200,7 @@ public class SftpFileObject extends 
AbstractFileObject<SftpFileSystem> {
     }
 
     @Override
-    protected long doGetLastModifiedTime() throws Exception {
+    protected synchronized long doGetLastModifiedTime() throws Exception {
         if (attrs == null || (attrs.getFlags() & 
SftpATTRS.SSH_FILEXFER_ATTR_ACMODTIME) == 0) {
             throw new 
FileSystemException("vfs.provider.sftp/unknown-modtime.error");
         }
@@ -231,7 +231,7 @@ public class SftpFileObject extends 
AbstractFileObject<SftpFileSystem> {
      * Determines the type of this file, returns null if the file does not 
exist.
      */
     @Override
-    protected FileType doGetType() throws Exception {
+    protected synchronized FileType doGetType() throws Exception {
         if (attrs == null) {
             statSelf();
         }
@@ -366,7 +366,7 @@ public class SftpFileObject extends 
AbstractFileObject<SftpFileSystem> {
     }
 
     @Override
-    protected boolean doSetExecutable(final boolean executable, final boolean 
ownerOnly) throws Exception {
+    protected synchronized boolean doSetExecutable(final boolean executable, 
final boolean ownerOnly) throws Exception {
         final PosixPermissions permissions = getPermissions(false);
         final int newPermissions = permissions.makeExecutable(executable, 
ownerOnly);
         if (newPermissions == permissions.getPermissions()) {
@@ -387,7 +387,7 @@ public class SftpFileObject extends 
AbstractFileObject<SftpFileSystem> {
      *            at the moment jsch send them with second precision.
      */
     @Override
-    protected boolean doSetLastModifiedTime(final long modtime) throws 
Exception {
+    protected synchronized boolean doSetLastModifiedTime(final long modtime) 
throws Exception {
         final int newMTime = (int) (modtime / MOD_TIME_FACTOR);
         attrs.setACMODTIME(attrs.getATime(), newMTime);
         flushStat();
@@ -409,7 +409,7 @@ public class SftpFileObject extends 
AbstractFileObject<SftpFileSystem> {
     }
 
     @Override
-    protected boolean doSetWritable(final boolean writable, final boolean 
ownerOnly) throws Exception {
+    protected synchronized boolean doSetWritable(final boolean writable, final 
boolean ownerOnly) throws Exception {
         final PosixPermissions permissions = getPermissions(false);
         final int newPermissions = permissions.makeWritable(writable, 
ownerOnly);
         if (newPermissions == permissions.getPermissions()) {
@@ -422,7 +422,7 @@ public class SftpFileObject extends 
AbstractFileObject<SftpFileSystem> {
         return true;
     }
 
-    private void flushStat() throws IOException, SftpException {
+    private synchronized void flushStat() throws IOException, SftpException {
         final ChannelSftp channel = getAbstractFileSystem().getChannel();
         try {
             channel.setStat(relPath, attrs);
@@ -455,7 +455,7 @@ public class SftpFileObject extends 
AbstractFileObject<SftpFileSystem> {
      * @throws Exception If an error occurs
      * @since 2.1
      */
-    protected PosixPermissions getPermissions(final boolean checkIds) throws 
Exception {
+    protected synchronized PosixPermissions getPermissions(final boolean 
checkIds) throws Exception {
         statSelf();
         boolean isInGroup = false;
         if (checkIds) {
@@ -488,7 +488,7 @@ public class SftpFileObject extends 
AbstractFileObject<SftpFileSystem> {
     /**
      * Sets attrs from listChildrenResolved
      */
-    private void setStat(final SftpATTRS attrs) {
+    private synchronized void setStat(final SftpATTRS attrs) {
         this.attrs = attrs;
     }
 
@@ -497,7 +497,7 @@ public class SftpFileObject extends 
AbstractFileObject<SftpFileSystem> {
      *
      * @throws IOException if an error occurs.
      */
-    private void statSelf() throws IOException {
+    private synchronized void statSelf() throws IOException {
         ChannelSftp channelSftp = null;
         try {
             channelSftp = getAbstractFileSystem().getChannel();