public static String buildPath(String parent, String firstPart, String... restOfParts) {
PathUtils.validatePath(parent);
if (firstPart.contains("/"))
throw new IllegalArgumentException("only parent may contain / character");
String path = (parent.equals("/") ? parent : parent + "/") + firstPart;
for (String part : restOfParts) {
if (part.contains("/"))
throw new IllegalArgumentException("only parent may contain / character");
path = path + "/" + part;
}
PathUtils.validatePath(path);
return path;
}
/**
* Return the data and the stat of the node of the given path.
*
* <p>If the watch is non-null and the call is successful (no exception is thrown), a watch will
* be left on the node with the given path. The watch will be triggered by a successful operation
* that sets data on the node, or deletes the node.
*
* <p>A KeeperException with error code KeeperException.NoNode will be thrown if no node with the
* given path exists.
*
* @param path the given path
* @param watcher explicit watcher
* @param stat the stat of the node
* @return the data of the node
* @throws KeeperException If the server signals an error with a non-zero error code
* @throws InterruptedException If the server transaction is interrupted.
* @throws IllegalArgumentException if an invalid path is specified
*/
public byte[] getData(final String path, Watcher watcher, Stat stat)
throws KeeperException, InterruptedException {
final String clientPath = path;
PathUtils.validatePath(clientPath);
// the watch contains the un-chroot path
WatchRegistration wcb = null;
if (watcher != null) {
wcb = new DataWatchRegistration(watcher, clientPath);
}
final String serverPath = prependChroot(clientPath);
RequestHeader h = new RequestHeader();
h.setType(ZooDefs.OpCode.getData);
GetDataRequest request = new GetDataRequest();
request.setPath(serverPath);
request.setWatch(watcher != null);
GetDataResponse response = new GetDataResponse();
ReplyHeader r = cnxn.submitRequest(h, request, response, wcb);
if (r.getErr() != 0) {
throw KeeperException.create(KeeperException.Code.get(r.getErr()), clientPath);
}
if (stat != null) {
DataTree.copyStat(response.getStat(), stat);
}
return response.getData();
}
/**
* Create a node with the given path. The node data will be the given data, and node acl will be
* the given acl.
*
* <p>The flags argument specifies whether the created node will be ephemeral or not.
*
* <p>An ephemeral node will be removed by the ZooKeeper automatically when the session associated
* with the creation of the node expires.
*
* <p>The flags argument can also specify to create a sequential node. The actual path name of a
* sequential node will be the given path plus a suffix "_i" where i is the current sequential
* number of the node. Once such a node is created, the sequential number will be incremented by
* one.
*
* <p>If a node with the same actual path already exists in the ZooKeeper, a KeeperException with
* error code KeeperException.NodeExists will be thrown. Note that since a different actual path
* is used for each invocation of creating sequential node with the same path argument, the call
* will never throw "file exists" KeeperException.
*
* <p>If the parent node does not exist in the ZooKeeper, a KeeperException with error code
* KeeperException.NoNode will be thrown.
*
* <p>An ephemeral node cannot have children. If the parent node of the given path is ephemeral, a
* KeeperException with error code KeeperException.NoChildrenForEphemerals will be thrown.
*
* <p>This operation, if successful, will trigger all the watches left on the node of the given
* path by exists and getData API calls, and the watches left on the parent node by getChildren
* API calls.
*
* <p>If a node is created successfully, the ZooKeeper server will trigger the watches on the path
* left by exists calls, and the watches on the parent of the node by getChildren calls.
*
* <p>The maximum allowable size of the data array is 1 MB (1,048,576 bytes). Arrays larger than
* this will cause a KeeperExecption to be thrown.
*
* @param path the path for the node
* @param data the initial data for the node
* @param acl the acl for the node
* @param createMode specifying whether the node to be created is ephemeral and/or sequential
* @return the actual path of the created node
* @throws KeeperException if the server returns a non-zero error code
* @throws KeeperException.InvalidACLException if the ACL is invalid
* @throws InterruptedException if the transaction is interrupted
* @throws IllegalArgumentException if an invalid path is specified
*/
public String create(final String path, byte data[], List<ACL> acl, CreateMode createMode)
throws KeeperException, InterruptedException {
final String clientPath = path;
PathUtils.validatePath(clientPath, createMode.isSequential());
final String serverPath = prependChroot(clientPath);
RequestHeader h = new RequestHeader();
h.setType(ZooDefs.OpCode.create);
CreateRequest request = new CreateRequest();
CreateResponse response = new CreateResponse();
request.setData(data);
request.setFlags(createMode.toFlag());
request.setPath(serverPath);
if (acl != null && acl.size() == 0) {
throw new KeeperException.InvalidACLException();
}
request.setAcl(acl);
ReplyHeader r = cnxn.submitRequest(h, request, response, null);
if (r.getErr() != 0) {
throw KeeperException.create(KeeperException.Code.get(r.getErr()), clientPath);
}
if (cnxn.chrootPath == null) {
return response.getPath();
} else {
return response.getPath().substring(cnxn.chrootPath.length());
}
}
/**
* Return the list of the children of the node of the given path.
*
* <p>If the watch is non-null and the call is successful (no exception is thrown), a watch will
* be left on the node with the given path. The watch willbe triggered by a successful operation
* that deletes the node of the given path or creates/delete a child under the node.
*
* <p>The list of children returned is not sorted and no guarantee is provided as to its natural
* or lexical order.
*
* <p>A KeeperException with error code KeeperException.NoNode will be thrown if no node with the
* given path exists.
*
* @param path
* @param watcher explicit watcher
* @return an unordered array of children of the node with the given path
* @throws InterruptedException If the server transaction is interrupted.
* @throws KeeperException If the server signals an error with a non-zero error code.
* @throws IllegalArgumentException if an invalid path is specified
*/
public List<String> getChildren(final String path, Watcher watcher)
throws KeeperException, InterruptedException {
final String clientPath = path;
PathUtils.validatePath(clientPath);
// the watch contains the un-chroot path
WatchRegistration wcb = null;
if (watcher != null) {
wcb = new ChildWatchRegistration(watcher, clientPath);
}
final String serverPath = prependChroot(clientPath);
RequestHeader h = new RequestHeader();
h.setType(ZooDefs.OpCode.getChildren);
GetChildrenRequest request = new GetChildrenRequest();
request.setPath(serverPath);
request.setWatch(watcher != null);
GetChildrenResponse response = new GetChildrenResponse();
ReplyHeader r = cnxn.submitRequest(h, request, response, wcb);
if (r.getErr() != 0) {
throw KeeperException.create(KeeperException.Code.get(r.getErr()), clientPath);
}
return response.getChildren();
}
/**
* Delete the node with the given path. The call will succeed if such a node exists, and the given
* version matches the node's version (if the given version is -1, it matches any node's
* versions).
*
* <p>A KeeperException with error code KeeperException.NoNode will be thrown if the nodes does
* not exist.
*
* <p>A KeeperException with error code KeeperException.BadVersion will be thrown if the given
* version does not match the node's version.
*
* <p>A KeeperException with error code KeeperException.NotEmpty will be thrown if the node has
* children.
*
* <p>This operation, if successful, will trigger all the watches on the node of the given path
* left by exists API calls, and the watches on the parent node left by getChildren API calls.
*
* @param path the path of the node to be deleted.
* @param version the expected node version.
* @throws InterruptedException IF the server transaction is interrupted
* @throws KeeperException If the server signals an error with a non-zero return code.
* @throws IllegalArgumentException if an invalid path is specified
*/
public void delete(final String path, int version) throws InterruptedException, KeeperException {
final String clientPath = path;
PathUtils.validatePath(clientPath);
final String serverPath;
// maintain semantics even in chroot case
// specifically - root cannot be deleted
// I think this makes sense even in chroot case.
if (clientPath.equals("/")) {
// a bit of a hack, but delete(/) will never succeed and ensures
// that the same semantics are maintained
serverPath = clientPath;
} else {
serverPath = prependChroot(clientPath);
}
RequestHeader h = new RequestHeader();
h.setType(ZooDefs.OpCode.delete);
DeleteRequest request = new DeleteRequest();
request.setPath(serverPath);
request.setVersion(version);
ReplyHeader r = cnxn.submitRequest(h, request, null, null);
if (r.getErr() != 0) {
throw KeeperException.create(KeeperException.Code.get(r.getErr()), clientPath);
}
}
/**
* Return the stat of the node of the given path. Return null if no such a node exists.
*
* <p>If the watch is non-null and the call is successful (no exception is thrown), a watch will
* be left on the node with the given path. The watch will be triggered by a successful operation
* that creates/delete the node or sets the data on the node.
*
* @param path the node path
* @param watcher explicit watcher
* @return the stat of the node of the given path; return null if no such a node exists.
* @throws KeeperException If the server signals an error
* @throws InterruptedException If the server transaction is interrupted.
* @throws IllegalArgumentException if an invalid path is specified
*/
public Stat exists(final String path, Watcher watcher)
throws KeeperException, InterruptedException {
final String clientPath = path;
PathUtils.validatePath(clientPath);
// the watch contains the un-chroot path
WatchRegistration wcb = null;
if (watcher != null) {
wcb = new ExistsWatchRegistration(watcher, clientPath);
}
final String serverPath = prependChroot(clientPath);
RequestHeader h = new RequestHeader();
h.setType(ZooDefs.OpCode.exists);
ExistsRequest request = new ExistsRequest();
request.setPath(serverPath);
request.setWatch(watcher != null);
SetDataResponse response = new SetDataResponse();
ReplyHeader r = cnxn.submitRequest(h, request, response, wcb);
if (r.getErr() != 0) {
if (r.getErr() == KeeperException.Code.NONODE.intValue()) {
return null;
}
throw KeeperException.create(KeeperException.Code.get(r.getErr()), clientPath);
}
return response.getStat().getCzxid() == -1 ? null : response.getStat();
}
public static String getName(String path) {
PathUtils.validatePath(path);
if (path.equals("/")) {
throw new IllegalArgumentException("name of / is undefined");
}
final int index = path.lastIndexOf('/');
return path.substring(index + 1);
}
public static String getParent(String path) {
PathUtils.validatePath(path);
if (path.equals("/")) {
throw new IllegalArgumentException("parent of / is undefined");
}
final int index = path.lastIndexOf('/');
if (index == 0) {
return "/";
}
return path.substring(0, index);
}
/**
* Asynchronous sync. Flushes channel between process and leader.
*
* @param path
* @param cb a handler for the callback
* @param ctx context to be provided to the callback
* @throws IllegalArgumentException if an invalid path is specified
*/
public void sync(final String path, VoidCallback cb, Object ctx) {
final String clientPath = path;
PathUtils.validatePath(clientPath);
final String serverPath = prependChroot(clientPath);
RequestHeader h = new RequestHeader();
h.setType(ZooDefs.OpCode.sync);
SyncRequest request = new SyncRequest();
SyncResponse response = new SyncResponse();
request.setPath(serverPath);
cnxn.queuePacket(
h, new ReplyHeader(), request, response, cb, clientPath, serverPath, ctx, null);
}
/**
* The Asynchronous version of setData. The request doesn't actually until the asynchronous
* callback is called.
*
* @see #setData(String, byte[], int)
*/
public void setData(final String path, byte data[], int version, StatCallback cb, Object ctx) {
final String clientPath = path;
PathUtils.validatePath(clientPath);
final String serverPath = prependChroot(clientPath);
RequestHeader h = new RequestHeader();
h.setType(ZooDefs.OpCode.setData);
SetDataRequest request = new SetDataRequest();
request.setPath(serverPath);
request.setData(data);
request.setVersion(version);
SetDataResponse response = new SetDataResponse();
cnxn.queuePacket(
h, new ReplyHeader(), request, response, cb, clientPath, serverPath, ctx, null);
}
LockInternals(
CuratorFramework client,
LockInternalsDriver driver,
String path,
String lockName,
int maxLeases) {
this.driver = driver;
this.lockName = lockName;
this.maxLeases = maxLeases;
PathUtils.validatePath(path);
this.client = client;
this.basePath = path;
this.path = ZKPaths.makePath(path, lockName);
ensurePath = client.newNamespaceAwareEnsurePath(basePath);
}
/**
* Return the ACL and stat of the node of the given path.
*
* <p>A KeeperException with error code KeeperException.NoNode will be thrown if no node with the
* given path exists.
*
* @param path the given path for the node
* @param stat the stat of the node will be copied to this parameter.
* @return the ACL array of the given node.
* @throws InterruptedException If the server transaction is interrupted.
* @throws KeeperException If the server signals an error with a non-zero error code.
* @throws IllegalArgumentException if an invalid path is specified
*/
public List<ACL> getACL(final String path, Stat stat)
throws KeeperException, InterruptedException {
final String clientPath = path;
PathUtils.validatePath(clientPath);
final String serverPath = prependChroot(clientPath);
RequestHeader h = new RequestHeader();
h.setType(ZooDefs.OpCode.getACL);
GetACLRequest request = new GetACLRequest();
request.setPath(serverPath);
GetACLResponse response = new GetACLResponse();
ReplyHeader r = cnxn.submitRequest(h, request, response, null);
if (r.getErr() != 0) {
throw KeeperException.create(KeeperException.Code.get(r.getErr()), clientPath);
}
DataTree.copyStat(response.getStat(), stat);
return response.getAcl();
}
/**
* Set the data for the node of the given path if such a node exists and the given version matches
* the version of the node (if the given version is -1, it matches any node's versions). Return
* the stat of the node.
*
* <p>This operation, if successful, will trigger all the watches on the node of the given path
* left by getData calls.
*
* <p>A KeeperException with error code KeeperException.NoNode will be thrown if no node with the
* given path exists.
*
* <p>A KeeperException with error code KeeperException.BadVersion will be thrown if the given
* version does not match the node's version.
*
* <p>The maximum allowable size of the data array is 1 MB (1,048,576 bytes). Arrays larger than
* this will cause a KeeperExecption to be thrown.
*
* @param path the path of the node
* @param data the data to set
* @param version the expected matching version
* @return the state of the node
* @throws InterruptedException If the server transaction is interrupted.
* @throws KeeperException If the server signals an error with a non-zero error code.
* @throws IllegalArgumentException if an invalid path is specified
*/
public Stat setData(final String path, byte data[], int version)
throws KeeperException, InterruptedException {
final String clientPath = path;
PathUtils.validatePath(clientPath);
final String serverPath = prependChroot(clientPath);
RequestHeader h = new RequestHeader();
h.setType(ZooDefs.OpCode.setData);
SetDataRequest request = new SetDataRequest();
request.setPath(serverPath);
request.setData(data);
request.setVersion(version);
SetDataResponse response = new SetDataResponse();
ReplyHeader r = cnxn.submitRequest(h, request, response, null);
if (r.getErr() != 0) {
throw KeeperException.create(KeeperException.Code.get(r.getErr()), clientPath);
}
return response.getStat();
}
/**
* The Asynchronous version of getData. The request doesn't actually until the asynchronous
* callback is called.
*
* @see #getData(String, Watcher, Stat)
*/
public void getData(final String path, Watcher watcher, DataCallback cb, Object ctx) {
final String clientPath = path;
PathUtils.validatePath(clientPath);
// the watch contains the un-chroot path
WatchRegistration wcb = null;
if (watcher != null) {
wcb = new DataWatchRegistration(watcher, clientPath);
}
final String serverPath = prependChroot(clientPath);
RequestHeader h = new RequestHeader();
h.setType(ZooDefs.OpCode.getData);
GetDataRequest request = new GetDataRequest();
request.setPath(serverPath);
request.setWatch(watcher != null);
GetDataResponse response = new GetDataResponse();
cnxn.queuePacket(h, new ReplyHeader(), request, response, cb, clientPath, serverPath, ctx, wcb);
}
/**
* Set the ACL for the node of the given path if such a node exists and the given version matches
* the version of the node. Return the stat of the node.
*
* <p>A KeeperException with error code KeeperException.NoNode will be thrown if no node with the
* given path exists.
*
* <p>A KeeperException with error code KeeperException.BadVersion will be thrown if the given
* version does not match the node's version.
*
* @param path
* @param acl
* @param version
* @return the stat of the node.
* @throws InterruptedException If the server transaction is interrupted.
* @throws KeeperException If the server signals an error with a non-zero error code.
* @throws org.apache.zookeeper.KeeperException.InvalidACLException If the acl is invalide.
* @throws IllegalArgumentException if an invalid path is specified
*/
public Stat setACL(final String path, List<ACL> acl, int version)
throws KeeperException, InterruptedException {
final String clientPath = path;
PathUtils.validatePath(clientPath);
final String serverPath = prependChroot(clientPath);
RequestHeader h = new RequestHeader();
h.setType(ZooDefs.OpCode.setACL);
SetACLRequest request = new SetACLRequest();
request.setPath(serverPath);
if (acl != null && acl.size() == 0) {
throw new KeeperException.InvalidACLException();
}
request.setAcl(acl);
request.setVersion(version);
SetACLResponse response = new SetACLResponse();
ReplyHeader r = cnxn.submitRequest(h, request, response, null);
if (r.getErr() != 0) {
throw KeeperException.create(KeeperException.Code.get(r.getErr()), clientPath);
}
return response.getStat();
}
/**
* The Asynchronous version of create. The request doesn't actually until the asynchronous
* callback is called.
*
* @see #create(String, byte[], List, CreateMode)
*/
public void create(
final String path,
byte data[],
List<ACL> acl,
CreateMode createMode,
StringCallback cb,
Object ctx) {
final String clientPath = path;
PathUtils.validatePath(clientPath, createMode.isSequential());
final String serverPath = prependChroot(clientPath);
RequestHeader h = new RequestHeader();
h.setType(ZooDefs.OpCode.create);
CreateRequest request = new CreateRequest();
CreateResponse response = new CreateResponse();
ReplyHeader r = new ReplyHeader();
request.setData(data);
request.setFlags(createMode.toFlag());
request.setPath(serverPath);
request.setAcl(acl);
cnxn.queuePacket(h, r, request, response, cb, clientPath, serverPath, ctx, null);
}
/**
* The Asynchronous version of delete. The request doesn't actually until the asynchronous
* callback is called.
*
* @see #delete(String, int)
*/
public void delete(final String path, int version, VoidCallback cb, Object ctx) {
final String clientPath = path;
PathUtils.validatePath(clientPath);
final String serverPath;
// maintain semantics even in chroot case
// specifically - root cannot be deleted
// I think this makes sense even in chroot case.
if (clientPath.equals("/")) {
// a bit of a hack, but delete(/) will never succeed and ensures
// that the same semantics are maintained
serverPath = clientPath;
} else {
serverPath = prependChroot(clientPath);
}
RequestHeader h = new RequestHeader();
h.setType(ZooDefs.OpCode.delete);
DeleteRequest request = new DeleteRequest();
request.setPath(serverPath);
request.setVersion(version);
cnxn.queuePacket(h, new ReplyHeader(), request, null, cb, clientPath, serverPath, ctx, null);
}
/**
* This method will be called inside the ProcessRequestThread, which is a singleton, so there will
* be a single thread calling this code.
*
* @param request
*/
@SuppressWarnings("unchecked")
protected void pRequest(Request request) throws RequestProcessorException {
// LOG.info("Prep>>> cxid = " + request.cxid + " type = " +
// request.type + " id = 0x" + Long.toHexString(request.sessionId));
TxnHeader txnHeader = null;
Record txn = null;
try {
switch (request.type) {
case OpCode.create:
txnHeader =
new TxnHeader(
request.sessionId, request.cxid, zks.getNextZxid(), zks.getTime(), OpCode.create);
zks.sessionTracker.checkSession(request.sessionId, request.getOwner());
CreateRequest createRequest = new CreateRequest();
ZooKeeperServer.byteBuffer2Record(request.request, createRequest);
String path = createRequest.getPath();
int lastSlash = path.lastIndexOf('/');
if (lastSlash == -1 || path.indexOf('\0') != -1 || failCreate) {
LOG.info(
"Invalid path " + path + " with session 0x" + Long.toHexString(request.sessionId));
throw new KeeperException.BadArgumentsException(path);
}
if (!fixupACL(request.authInfo, createRequest.getAcl())) {
throw new KeeperException.InvalidACLException(path);
}
String parentPath = path.substring(0, lastSlash);
ChangeRecord parentRecord = getRecordForPath(parentPath);
checkACL(zks, parentRecord.acl, ZooDefs.Perms.CREATE, request.authInfo);
int parentCVersion = parentRecord.stat.getCversion();
CreateMode createMode = CreateMode.fromFlag(createRequest.getFlags());
if (createMode.isSequential()) {
path = path + String.format(Locale.ENGLISH, "%010d", parentCVersion);
}
try {
PathUtils.validatePath(path);
} catch (IllegalArgumentException ie) {
LOG.info(
"Invalid path " + path + " with session 0x" + Long.toHexString(request.sessionId));
throw new KeeperException.BadArgumentsException(path);
}
try {
if (getRecordForPath(path) != null) {
throw new KeeperException.NodeExistsException(path);
}
} catch (KeeperException.NoNodeException e) {
// ignore this one
}
boolean ephemeralParent = parentRecord.stat.getEphemeralOwner() != 0;
if (ephemeralParent) {
throw new KeeperException.NoChildrenForEphemeralsException(path);
}
txn =
new CreateTxn(
path, createRequest.getData(), createRequest.getAcl(), createMode.isEphemeral());
StatPersisted s = new StatPersisted();
if (createMode.isEphemeral()) {
s.setEphemeralOwner(request.sessionId);
}
parentRecord = parentRecord.duplicate(txnHeader.getZxid());
parentRecord.childCount++;
parentRecord.stat.setCversion(parentRecord.stat.getCversion() + 1);
addChangeRecord(parentRecord);
addChangeRecord(
new ChangeRecord(txnHeader.getZxid(), path, s, 0, createRequest.getAcl()));
break;
case OpCode.delete:
txnHeader =
new TxnHeader(
request.sessionId, request.cxid, zks.getNextZxid(), zks.getTime(), OpCode.delete);
zks.sessionTracker.checkSession(request.sessionId, request.getOwner());
DeleteRequest deleteRequest = new DeleteRequest();
ZooKeeperServer.byteBuffer2Record(request.request, deleteRequest);
path = deleteRequest.getPath();
lastSlash = path.lastIndexOf('/');
if (lastSlash == -1
|| path.indexOf('\0') != -1
|| zks.getZKDatabase().isSpecialPath(path)) {
throw new KeeperException.BadArgumentsException(path);
}
parentPath = path.substring(0, lastSlash);
parentRecord = getRecordForPath(parentPath);
ChangeRecord nodeRecord = getRecordForPath(path);
checkACL(zks, parentRecord.acl, ZooDefs.Perms.DELETE, request.authInfo);
int version = deleteRequest.getVersion();
if (version != -1 && nodeRecord.stat.getVersion() != version) {
throw new KeeperException.BadVersionException(path);
}
if (nodeRecord.childCount > 0) {
throw new KeeperException.NotEmptyException(path);
}
txn = new DeleteTxn(path);
parentRecord = parentRecord.duplicate(txnHeader.getZxid());
parentRecord.childCount--;
parentRecord.stat.setCversion(parentRecord.stat.getCversion() + 1);
addChangeRecord(parentRecord);
addChangeRecord(new ChangeRecord(txnHeader.getZxid(), path, null, -1, null));
break;
case OpCode.setData:
txnHeader =
new TxnHeader(
request.sessionId,
request.cxid,
zks.getNextZxid(),
zks.getTime(),
OpCode.setData);
zks.sessionTracker.checkSession(request.sessionId, request.getOwner());
SetDataRequest setDataRequest = new SetDataRequest();
ZooKeeperServer.byteBuffer2Record(request.request, setDataRequest);
path = setDataRequest.getPath();
nodeRecord = getRecordForPath(path);
checkACL(zks, nodeRecord.acl, ZooDefs.Perms.WRITE, request.authInfo);
version = setDataRequest.getVersion();
int currentVersion = nodeRecord.stat.getVersion();
if (version != -1 && version != currentVersion) {
throw new KeeperException.BadVersionException(path);
}
version = currentVersion + 1;
txn = new SetDataTxn(path, setDataRequest.getData(), version);
nodeRecord = nodeRecord.duplicate(txnHeader.getZxid());
nodeRecord.stat.setVersion(version);
addChangeRecord(nodeRecord);
break;
case OpCode.setACL:
txnHeader =
new TxnHeader(
request.sessionId, request.cxid, zks.getNextZxid(), zks.getTime(), OpCode.setACL);
zks.sessionTracker.checkSession(request.sessionId, request.getOwner());
SetACLRequest setAclRequest = new SetACLRequest();
ZooKeeperServer.byteBuffer2Record(request.request, setAclRequest);
path = setAclRequest.getPath();
if (!fixupACL(request.authInfo, setAclRequest.getAcl())) {
throw new KeeperException.InvalidACLException(path);
}
nodeRecord = getRecordForPath(path);
checkACL(zks, nodeRecord.acl, ZooDefs.Perms.ADMIN, request.authInfo);
version = setAclRequest.getVersion();
currentVersion = nodeRecord.stat.getAversion();
if (version != -1 && version != currentVersion) {
throw new KeeperException.BadVersionException(path);
}
version = currentVersion + 1;
txn = new SetACLTxn(path, setAclRequest.getAcl(), version);
nodeRecord = nodeRecord.duplicate(txnHeader.getZxid());
nodeRecord.stat.setAversion(version);
addChangeRecord(nodeRecord);
break;
case OpCode.createSession:
txnHeader =
new TxnHeader(
request.sessionId,
request.cxid,
zks.getNextZxid(),
zks.getTime(),
OpCode.createSession);
request.request.rewind();
int to = request.request.getInt();
txn = new CreateSessionTxn(to);
request.request.rewind();
zks.sessionTracker.addSession(request.sessionId, to);
zks.setOwner(request.sessionId, request.getOwner());
break;
case OpCode.closeSession:
txnHeader =
new TxnHeader(
request.sessionId,
request.cxid,
zks.getNextZxid(),
zks.getTime(),
OpCode.closeSession);
// We don't want to do this check since the session expiration thread
// queues up this operation without being the session owner.
// this request is the last of the session so it should be ok
// zks.sessionTracker.checkSession(request.sessionId, request.getOwner());
HashSet<String> es = zks.getZKDatabase().getEphemerals(request.sessionId);
synchronized (zks.outstandingChanges) {
for (ChangeRecord c : zks.outstandingChanges) {
if (c.stat == null) {
// Doing a delete
es.remove(c.path);
} else if (c.stat.getEphemeralOwner() == request.sessionId) {
es.add(c.path);
}
}
for (String path2Delete : es) {
addChangeRecord(new ChangeRecord(txnHeader.getZxid(), path2Delete, null, 0, null));
}
zks.sessionTracker.setSessionClosing(request.sessionId);
}
LOG.info(
"Processed session termination for sessionid: 0x"
+ Long.toHexString(request.sessionId));
break;
case OpCode.sync:
case OpCode.exists:
case OpCode.getData:
case OpCode.getACL:
case OpCode.getChildren:
case OpCode.getChildren2:
case OpCode.ping:
case OpCode.setWatches:
zks.sessionTracker.checkSession(request.sessionId, request.getOwner());
break;
}
} catch (KeeperException e) {
if (txnHeader != null) {
txnHeader.setType(OpCode.error);
txn = new ErrorTxn(e.code().intValue());
}
LOG.info(
"Got user-level KeeperException when processing "
+ request.toString()
+ " Error Path:"
+ e.getPath()
+ " Error:"
+ e.getMessage());
request.setException(e);
} catch (Exception e) {
// log at error level as we are returning a marshalling
// error to the user
LOG.error("Failed to process " + request, e);
StringBuilder sb = new StringBuilder();
ByteBuffer bb = request.request;
if (bb != null) {
bb.rewind();
while (bb.hasRemaining()) {
sb.append(Integer.toHexString(bb.get() & 0xff));
}
} else {
sb.append("request buffer is null");
}
LOG.error("Dumping request buffer: 0x" + sb.toString());
if (txnHeader != null) {
txnHeader.setType(OpCode.error);
txn = new ErrorTxn(Code.MARSHALLINGERROR.intValue());
}
}
request.hdr = txnHeader;
request.txn = txn;
request.zxid = zks.getZxid();
nextProcessor.processRequest(request);
}
