tomaswolf commented on a change in pull request #207:
URL: https://github.com/apache/mina-sshd/pull/207#discussion_r739644691
##########
File path: sshd-sftp/src/main/java/org/apache/sshd/sftp/client/fs/SftpPath.java
##########
@@ -25,12 +25,80 @@
import java.util.List;
import org.apache.sshd.common.file.util.BasePath;
+import org.apache.sshd.sftp.client.SftpClient;
public class SftpPath extends BasePath<SftpPath, SftpFileSystem> {
+
+ private SftpClient.Attributes attributes;
+
+ private int cachingLevel;
+
public SftpPath(SftpFileSystem fileSystem, String root, List<String>
names) {
super(fileSystem, root, names);
}
+ /**
+ * {@link SftpPath} instances can cache SFTP {@link
SftpClient.Attributes}. Caching can be enabled by passing
+ * {@code true}. If the {@link SftpPath} instance is already caching
attributes, a counter is increased only. To
+ * disable caching, pass {@code false}, which decreases the counter. The
cache is cleared when the counter reaches
+ * zero again.
+ * <p>
+ * Each call of {@code cacheAttributes(true)} must be matched by a call to
{@code cacheAttributes(false)}. Such call
+ * pairs can be nested; caching is enabled for the duration of the
outermost such pair. The outermost call passing
+ * {@code true} clears any possibly already cached attributes so that the
next attempt to read remote attributes
+ * will fetch them anew.
+ *
+ * @param doCache whether to start caching (increasing the cache level) or
to stop caching (decreasing the cache
+ * level)
+ */
+ protected void cacheAttributes(boolean doCache) {
+ if (doCache) {
+ // Start caching. Clear possibly already cached data
+ if (cachingLevel == 0) {
+ attributes = null;
+ }
+ cachingLevel++;
+ } else if (!doCache) {
+ // Stop caching
+ if (cachingLevel > 0) {
+ cachingLevel--;
+ if (cachingLevel == 0) {
+ attributes = null;
+ }
+ }
+ }
+ }
+
+ /**
+ * Sets the cached attributes to the argument if this {@link SftpPath}
instance is currently caching attributes.
+ * Otherwise a no-op.
+ *
+ * @param attributes the {@link SftpClient.Attributes} to cache
+ */
+ protected void cacheAttributes(SftpClient.Attributes attributes) {
+ if (cachingLevel > 0) {
+ setAttributes(attributes);
+ }
+ }
+
+ /**
+ * Unconditionally set the cached attributes, whether or not this
instance's attribute cache is enabled.
+ *
+ * @param attributes the {@link SftpClient.Attributes} to cache
+ */
+ void setAttributes(SftpClient.Attributes attributes) {
Review comment:
Refactored anyway. This is now on `SftpPathImpl`.
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: dev-unsubscr...@mina.apache.org
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org
---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscr...@mina.apache.org
For additional commands, e-mail: dev-h...@mina.apache.org
