/**
* 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.hadoop.hdfs.server.namenode;
import com.google.common.collect.Lists;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.hdfs.inotify.Event;
import org.apache.hadoop.hdfs.inotify.EventBatch;
import org.apache.hadoop.hdfs.protocol.Block;
import java.util.List;
/**
* Translates from edit log ops to inotify events.
*/
@InterfaceAudience.Private
public class InotifyFSEditLogOpTranslator {
private static long getSize(FSEditLogOp.AddCloseOp acOp) {
long size = 0;
for (Block b : acOp.getBlocks()) {
size += b.getNumBytes();
}
return size;
}
public static EventBatch translate(FSEditLogOp op) {
switch(op.opCode) {
case OP_ADD:
FSEditLogOp.AddOp addOp = (FSEditLogOp.AddOp) op;
if (addOp.blocks.length == 0) { // create
return new EventBatch(op.txid,
new Event[] { new Event.CreateEvent.Builder().path(addOp.path)
.ctime(addOp.atime)
.replication(addOp.replication)
.ownerName(addOp.permissions.getUserName())
.groupName(addOp.permissions.getGroupName())
.perms(addOp.permissions.getPermission())
.overwrite(addOp.overwrite)
.defaultBlockSize(addOp.blockSize)
.iNodeType(Event.CreateEvent.INodeType.FILE).build() });
} else { // append
return new EventBatch(op.txid,
new Event[]{new Event.AppendEvent.Builder()
.path(addOp.path)
.build()});
}
case OP_CLOSE:
FSEditLogOp.CloseOp cOp = (FSEditLogOp.CloseOp) op;
return new EventBatch(op.txid, new Event[] {
new Event.CloseEvent(cOp.path, getSize(cOp), cOp.mtime) });
case OP_APPEND:
FSEditLogOp.AppendOp appendOp = (FSEditLogOp.AppendOp) op;
return new EventBatch(op.txid, new Event[] {new Event.AppendEvent
.Builder().path(appendOp.path).newBlock(appendOp.newBlock).build()});
case OP_SET_REPLICATION:
FSEditLogOp.SetReplicationOp setRepOp = (FSEditLogOp.SetReplicationOp) op;
return new EventBatch(op.txid,
new Event[] { new Event.MetadataUpdateEvent.Builder()
.metadataType(Event.MetadataUpdateEvent.MetadataType.REPLICATION)
.path(setRepOp.path)
.replication(setRepOp.replication).build() });
case OP_CONCAT_DELETE:
FSEditLogOp.ConcatDeleteOp cdOp = (FSEditLogOp.ConcatDeleteOp) op;
List<Event> events = Lists.newArrayList();
events.add(new Event.AppendEvent.Builder()
.path(cdOp.trg)
.build());
for (String src : cdOp.srcs) {
events.add(new Event.UnlinkEvent.Builder()
.path(src)
.timestamp(cdOp.timestamp)
.build());
}
events.add(new Event.CloseEvent(cdOp.trg, -1, cdOp.timestamp));
return new EventBatch(op.txid, events.toArray(new Event[0]));
case OP_RENAME_OLD:
FSEditLogOp.RenameOldOp rnOpOld = (FSEditLogOp.RenameOldOp) op;
return new EventBatch(op.txid, new Event[] {
new Event.RenameEvent.Builder()
.srcPath(rnOpOld.src)
.dstPath(rnOpOld.dst)
.timestamp(rnOpOld.timestamp)
.build() });
case OP_RENAME:
FSEditLogOp.RenameOp rnOp = (FSEditLogOp.RenameOp) op;
return new EventBatch(op.txid, new Event[] {
new Event.RenameEvent.Builder()
.srcPath(rnOp.src)
.dstPath(rnOp.dst)
.timestamp(rnOp.timestamp)
.build() });
case OP_DELETE:
FSEditLogOp.DeleteOp delOp = (FSEditLogOp.DeleteOp) op;
return new EventBatch(op.txid, new Event[] {
new Event.UnlinkEvent.Builder()
.path(delOp.path)
.timestamp(delOp.timestamp)
.build() });
case OP_MKDIR:
FSEditLogOp.MkdirOp mkOp = (FSEditLogOp.MkdirOp) op;
return new EventBatch(op.txid,
new Event[] { new Event.CreateEvent.Builder().path(mkOp.path)
.ctime(mkOp.timestamp)
.ownerName(mkOp.permissions.getUserName())
.groupName(mkOp.permissions.getGroupName())
.perms(mkOp.permissions.getPermission())
.iNodeType(Event.CreateEvent.INodeType.DIRECTORY).build() });
case OP_SET_PERMISSIONS:
FSEditLogOp.SetPermissionsOp permOp = (FSEditLogOp.SetPermissionsOp) op;
return new EventBatch(op.txid,
new Event[] { new Event.MetadataUpdateEvent.Builder()
.metadataType(Event.MetadataUpdateEvent.MetadataType.PERMS)
.path(permOp.src)
.perms(permOp.permissions).build() });
case OP_SET_OWNER:
FSEditLogOp.SetOwnerOp ownOp = (FSEditLogOp.SetOwnerOp) op;
return new EventBatch(op.txid,
new Event[] { new Event.MetadataUpdateEvent.Builder()
.metadataType(Event.MetadataUpdateEvent.MetadataType.OWNER)
.path(ownOp.src)
.ownerName(ownOp.username).groupName(ownOp.groupname).build() });
case OP_TIMES:
FSEditLogOp.TimesOp timesOp = (FSEditLogOp.TimesOp) op;
return new EventBatch(op.txid,
new Event[] { new Event.MetadataUpdateEvent.Builder()
.metadataType(Event.MetadataUpdateEvent.MetadataType.TIMES)
.path(timesOp.path)
.atime(timesOp.atime).mtime(timesOp.mtime).build() });
case OP_SYMLINK:
FSEditLogOp.SymlinkOp symOp = (FSEditLogOp.SymlinkOp) op;
return new EventBatch(op.txid,
new Event[] { new Event.CreateEvent.Builder().path(symOp.path)
.ctime(symOp.atime)
.ownerName(symOp.permissionStatus.getUserName())
.groupName(symOp.permissionStatus.getGroupName())
.perms(symOp.permissionStatus.getPermission())
.symlinkTarget(symOp.value)
.iNodeType(Event.CreateEvent.INodeType.SYMLINK).build() });
case OP_REMOVE_XATTR:
FSEditLogOp.RemoveXAttrOp rxOp = (FSEditLogOp.RemoveXAttrOp) op;
return new EventBatch(op.txid,
new Event[] { new Event.MetadataUpdateEvent.Builder()
.metadataType(Event.MetadataUpdateEvent.MetadataType.XATTRS)
.path(rxOp.src)
.xAttrs(rxOp.xAttrs)
.xAttrsRemoved(true).build() });
case OP_SET_XATTR:
FSEditLogOp.SetXAttrOp sxOp = (FSEditLogOp.SetXAttrOp) op;
return new EventBatch(op.txid,
new Event[] { new Event.MetadataUpdateEvent.Builder()
.metadataType(Event.MetadataUpdateEvent.MetadataType.XATTRS)
.path(sxOp.src)
.xAttrs(sxOp.xAttrs)
.xAttrsRemoved(false).build() });
case OP_SET_ACL:
FSEditLogOp.SetAclOp saOp = (FSEditLogOp.SetAclOp) op;
return new EventBatch(op.txid,
new Event[] { new Event.MetadataUpdateEvent.Builder()
.metadataType(Event.MetadataUpdateEvent.MetadataType.ACLS)
.path(saOp.src)
.acls(saOp.aclEntries).build() });
default:
return null;
}
}
}