/** for snapshot file while modifying file after snapshot. */
@Test(timeout = 15000)
public void testSnapshotPathINodesAfterModification() throws Exception {
// First check the INode for /TestSnapshot/sub1/file1
String[] names = INode.getPathNames(file1.toString());
byte[][] components = INode.getPathComponents(names);
INodesInPath nodesInPath = INodesInPath.resolve(fsdir.rootDir, components, false);
// The number of inodes should be equal to components.length
assertEquals(nodesInPath.length(), components.length);
// The last INode should be associated with file1
assertEquals(nodesInPath.getINode(components.length - 1).getFullPathName(), file1.toString());
// record the modification time of the inode
final long modTime = nodesInPath.getINode(nodesInPath.length() - 1).getModificationTime();
// Create a snapshot for the dir, and check the inodes for the path
// pointing to a snapshot file
hdfs.allowSnapshot(sub1);
hdfs.createSnapshot(sub1, "s3");
// Modify file1
DFSTestUtil.appendFile(hdfs, file1, "the content for appending");
// Check the INodes for snapshot of file1
String snapshotPath = sub1.toString() + "/.snapshot/s3/file1";
names = INode.getPathNames(snapshotPath);
components = INode.getPathComponents(names);
INodesInPath ssNodesInPath = INodesInPath.resolve(fsdir.rootDir, components, false);
// Length of ssInodes should be (components.length - 1), since we will
// ignore ".snapshot"
assertEquals(ssNodesInPath.length(), components.length - 1);
final Snapshot s3 = getSnapshot(ssNodesInPath, "s3", 3);
assertSnapshot(ssNodesInPath, true, s3, 3);
// Check the INode for snapshot of file1
INode snapshotFileNode = ssNodesInPath.getLastINode();
assertEquals(snapshotFileNode.getLocalName(), file1.getName());
assertTrue(snapshotFileNode.asFile().isWithSnapshot());
// The modification time of the snapshot INode should be the same with the
// original INode before modification
assertEquals(modTime, snapshotFileNode.getModificationTime(ssNodesInPath.getPathSnapshotId()));
// Check the INode for /TestSnapshot/sub1/file1 again
names = INode.getPathNames(file1.toString());
components = INode.getPathComponents(names);
INodesInPath newNodesInPath = INodesInPath.resolve(fsdir.rootDir, components, false);
assertSnapshot(newNodesInPath, false, s3, -1);
// The number of inodes should be equal to components.length
assertEquals(newNodesInPath.length(), components.length);
// The last INode should be associated with file1
final int last = components.length - 1;
assertEquals(newNodesInPath.getINode(last).getFullPathName(), file1.toString());
// The modification time of the INode for file3 should have been changed
Assert.assertFalse(modTime == newNodesInPath.getINode(last).getModificationTime());
hdfs.deleteSnapshot(sub1, "s3");
hdfs.disallowSnapshot(sub1);
}
static void assertSnapshot(
INodesInPath inodesInPath, boolean isSnapshot, final Snapshot snapshot, int index) {
assertEquals(isSnapshot, inodesInPath.isSnapshot());
assertEquals(
Snapshot.getSnapshotId(isSnapshot ? snapshot : null), inodesInPath.getPathSnapshotId());
if (!isSnapshot) {
assertEquals(Snapshot.getSnapshotId(snapshot), inodesInPath.getLatestSnapshotId());
}
if (isSnapshot && index >= 0) {
assertEquals(Snapshot.Root.class, inodesInPath.getINode(index).getClass());
}
}
