org.apache.solr.common.cloud

Class SolrZkClient

java.lang.Object

org.apache.solr.common.cloud.SolrZkClient

All Implemented Interfaces:

Closeable, AutoCloseable

public class SolrZkClient
extends Object
implements Closeable

All Solr ZooKeeper interactions should go through this class rather than ZooKeeper. This class handles synchronous connects and reconnections.

Field Summary

Fields

Modifier and Type	Field and Description
static String	ZK_ACL_PROVIDER_CLASS_NAME_VM_PARAM_NAME
static String	ZK_CRED_PROVIDER_CLASS_NAME_VM_PARAM_NAME

Constructor Summary

Constructors

Constructor and Description
SolrZkClient()
SolrZkClient(String zkServerAddress, int zkClientTimeout)
SolrZkClient(String zkServerAddress, int zkClientTimeout, int zkClientConnectTimeout)
SolrZkClient(String zkServerAddress, int zkClientTimeout, int zkClientConnectTimeout, OnReconnect onReonnect)
SolrZkClient(String zkServerAddress, int zkClientTimeout, int clientConnectTimeout, ZkClientConnectionStrategy strat, OnReconnect onReconnect)
SolrZkClient(String zkServerAddress, int zkClientTimeout, int clientConnectTimeout, ZkClientConnectionStrategy strat, OnReconnect onReconnect, BeforeReconnect beforeReconnect)
SolrZkClient(String zkServerAddress, int zkClientTimeout, int clientConnectTimeout, ZkClientConnectionStrategy strat, OnReconnect onReconnect, BeforeReconnect beforeReconnect, ZkACLProvider zkACLProvider)
SolrZkClient(String zkServerAddress, int zkClientTimeout, ZkClientConnectionStrategy strat, OnReconnect onReconnect)

Method Summary

Modifier and Type	Method and Description
static Throwable	checkInterrupted(Throwable e) Check to see if a Throwable is an InterruptedException, and if it is, set the thread interrupt flag
void	clean(String path)
void	close()
static boolean	containsChroot(String zkHost) Validates if zkHost contains a chroot.
String	create(String path, byte[] data, org.apache.zookeeper.CreateMode createMode, boolean retryOnConnLoss) Returns path of created node
protected ZkACLProvider	createZkACLProvider()
protected ZkCredentialsProvider	createZkCredentialsToAddAutomatically()
void	delete(String path, int version, boolean retryOnConnLoss)
void	downConfig(String confName, Path confPath)
void	downloadFromZK(String zkPath, Path dir)
Boolean	exists(String path, boolean retryOnConnLoss) Returns true if path exists
org.apache.zookeeper.data.Stat	exists(String path, org.apache.zookeeper.Watcher watcher, boolean retryOnConnLoss) Return the stat of the node of the given path.
List<String>	getChildren(String path, org.apache.zookeeper.Watcher watcher, boolean retryOnConnLoss) Returns children of the node at the path
ConnectionManager	getConnectionManager()
byte[]	getData(String path, org.apache.zookeeper.Watcher watcher, org.apache.zookeeper.data.Stat stat, boolean retryOnConnLoss) Returns node's data
SolrZooKeeper	getSolrZooKeeper()
ZkACLProvider	getZkACLProvider()
ZkClientConnectionStrategy	getZkClientConnectionStrategy()
int	getZkClientTimeout()
String	getZkServerAddress()
boolean	isClosed()
boolean	isConnected() Returns true if client is connected
String	listZnode(String path, Boolean recurse)
void	makePath(String path, boolean retryOnConnLoss) Creates the path in ZooKeeper, creating each node as necessary.
void	makePath(String path, boolean failOnExists, boolean retryOnConnLoss)
void	makePath(String path, byte[] data, boolean retryOnConnLoss) Creates the path in ZooKeeper, creating each node as necessary.
void	makePath(String path, byte[] data, org.apache.zookeeper.CreateMode createMode, boolean retryOnConnLoss) Creates the path in ZooKeeper, creating each node as necessary.
void	makePath(String path, byte[] data, org.apache.zookeeper.CreateMode createMode, org.apache.zookeeper.Watcher watcher, boolean retryOnConnLoss) Creates the path in ZooKeeper, creating each node as necessary.
void	makePath(String path, byte[] data, org.apache.zookeeper.CreateMode createMode, org.apache.zookeeper.Watcher watcher, boolean failOnExists, boolean retryOnConnLoss) Creates the path in ZooKeeper, creating each node as necessary.
void	makePath(String path, byte[] data, org.apache.zookeeper.CreateMode createMode, org.apache.zookeeper.Watcher watcher, boolean failOnExists, boolean retryOnConnLoss, int skipPathParts) Creates the path in ZooKeeper, creating each node as necessary.
void	makePath(String path, org.apache.zookeeper.CreateMode createMode, boolean retryOnConnLoss)
void	makePath(String zkPath, org.apache.zookeeper.CreateMode createMode, org.apache.zookeeper.Watcher watcher, boolean retryOnConnLoss)
void	makePath(String path, File file, boolean retryOnConnLoss)
void	makePath(String path, File file, boolean failOnExists, boolean retryOnConnLoss)
void	moveZnode(String src, String dst)
List<org.apache.zookeeper.OpResult>	multi(Iterable<org.apache.zookeeper.Op> ops, boolean retryOnConnLoss)
static String	prettyPrint(String input, int indent)
void	printLayout(String path, int indent, StringBuilder string) Fills string with printout of current ZooKeeper layout.
void	printLayoutToStdOut() Prints current ZooKeeper layout to stdout.
void	printLayoutToStream(PrintStream out)
org.apache.zookeeper.data.Stat	setACL(String path, List<org.apache.zookeeper.data.ACL> acls, boolean retryOnConnLoss) Set the ACL on a single node in ZooKeeper.
org.apache.zookeeper.data.Stat	setData(String path, byte[] data, boolean retryOnConnLoss) Write data to ZooKeeper.
org.apache.zookeeper.data.Stat	setData(String path, byte[] data, int version, boolean retryOnConnLoss) Returns node's state
org.apache.zookeeper.data.Stat	setData(String path, File file, boolean retryOnConnLoss) Write file to ZooKeeper - default system encoding used.
void	upConfig(Path confPath, String confName)
void	updateACLs(String root) Update all ACLs for a zk tree based on our configured ZkACLProvider.
void	uploadToZK(Path rootPath, String zkPath, Pattern filenameExclusions)
org.apache.zookeeper.Watcher	wrapWatcher(org.apache.zookeeper.Watcher watcher) Wraps the watcher so that it doesn't fire off ZK's event queue.
void	zkTransfer(String src, Boolean srcIsZk, String dst, Boolean dstIsZk, Boolean recurse)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

ZK_CRED_PROVIDER_CLASS_NAME_VM_PARAM_NAME

public static final String ZK_CRED_PROVIDER_CLASS_NAME_VM_PARAM_NAME

See Also:

Constant Field Values

ZK_ACL_PROVIDER_CLASS_NAME_VM_PARAM_NAME

public static final String ZK_ACL_PROVIDER_CLASS_NAME_VM_PARAM_NAME

See Also:

Constant Field Values

Constructor Detail

SolrZkClient

public SolrZkClient()

SolrZkClient

public SolrZkClient(String zkServerAddress,
                    int zkClientTimeout)

SolrZkClient

public SolrZkClient(String zkServerAddress,
                    int zkClientTimeout,
                    int zkClientConnectTimeout)

SolrZkClient

public SolrZkClient(String zkServerAddress,
                    int zkClientTimeout,
                    int zkClientConnectTimeout,
                    OnReconnect onReonnect)

SolrZkClient

public SolrZkClient(String zkServerAddress,
                    int zkClientTimeout,
                    ZkClientConnectionStrategy strat,
                    OnReconnect onReconnect)

SolrZkClient

public SolrZkClient(String zkServerAddress,
                    int zkClientTimeout,
                    int clientConnectTimeout,
                    ZkClientConnectionStrategy strat,
                    OnReconnect onReconnect)

SolrZkClient

public SolrZkClient(String zkServerAddress,
                    int zkClientTimeout,
                    int clientConnectTimeout,
                    ZkClientConnectionStrategy strat,
                    OnReconnect onReconnect,
                    BeforeReconnect beforeReconnect)

SolrZkClient

public SolrZkClient(String zkServerAddress,
                    int zkClientTimeout,
                    int clientConnectTimeout,
                    ZkClientConnectionStrategy strat,
                    OnReconnect onReconnect,
                    BeforeReconnect beforeReconnect,
                    ZkACLProvider zkACLProvider)

Method Detail

getZkClientTimeout

public int getZkClientTimeout()

getConnectionManager

public ConnectionManager getConnectionManager()

getZkClientConnectionStrategy

public ZkClientConnectionStrategy getZkClientConnectionStrategy()

createZkCredentialsToAddAutomatically

protected ZkCredentialsProvider createZkCredentialsToAddAutomatically()

createZkACLProvider

protected ZkACLProvider createZkACLProvider()

isConnected

public boolean isConnected()

Returns true if client is connected

delete

public void delete(String path,
                   int version,
                   boolean retryOnConnLoss)
            throws InterruptedException,
                   org.apache.zookeeper.KeeperException

Throws:

InterruptedException

org.apache.zookeeper.KeeperException

wrapWatcher

public org.apache.zookeeper.Watcher wrapWatcher(org.apache.zookeeper.Watcher watcher)

Wraps the watcher so that it doesn't fire off ZK's event queue. In order to guarantee that a watch object will only be triggered once for a given notification, users need to wrap their watcher using this method before calling exists(String, org.apache.zookeeper.Watcher, boolean) or getData(String, org.apache.zookeeper.Watcher, org.apache.zookeeper.data.Stat, boolean).

exists

public org.apache.zookeeper.data.Stat exists(String path,
                                             org.apache.zookeeper.Watcher watcher,
                                             boolean retryOnConnLoss)
                                      throws org.apache.zookeeper.KeeperException,
                                             InterruptedException

Return the stat of the node of the given path. Return null if no such a node exists.

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.

Parameters:

path - the node path

watcher - explicit watcher

Returns:

the stat of the node of the given path; return null if no such a node exists.

Throws:

org.apache.zookeeper.KeeperException - If the server signals an error

InterruptedException - If the server transaction is interrupted.

IllegalArgumentException - if an invalid path is specified

exists

public Boolean exists(String path,
                      boolean retryOnConnLoss)
               throws org.apache.zookeeper.KeeperException,
                      InterruptedException

Returns true if path exists

Throws:

org.apache.zookeeper.KeeperException

InterruptedException

getChildren

public List<String> getChildren(String path,
                                org.apache.zookeeper.Watcher watcher,
                                boolean retryOnConnLoss)
                         throws org.apache.zookeeper.KeeperException,
                                InterruptedException

Returns children of the node at the path

Throws:

org.apache.zookeeper.KeeperException

InterruptedException

getData

public byte[] getData(String path,
                      org.apache.zookeeper.Watcher watcher,
                      org.apache.zookeeper.data.Stat stat,
                      boolean retryOnConnLoss)
               throws org.apache.zookeeper.KeeperException,
                      InterruptedException

Returns node's data

Throws:

org.apache.zookeeper.KeeperException

InterruptedException

setData

public org.apache.zookeeper.data.Stat setData(String path,
                                              byte[] data,
                                              int version,
                                              boolean retryOnConnLoss)
                                       throws org.apache.zookeeper.KeeperException,
                                              InterruptedException

Returns node's state

Throws:

org.apache.zookeeper.KeeperException

InterruptedException

create

public String create(String path,
                     byte[] data,
                     org.apache.zookeeper.CreateMode createMode,
                     boolean retryOnConnLoss)
              throws org.apache.zookeeper.KeeperException,
                     InterruptedException

Returns path of created node

Throws:

org.apache.zookeeper.KeeperException

InterruptedException

makePath

public void makePath(String path,
                     boolean retryOnConnLoss)
              throws org.apache.zookeeper.KeeperException,
                     InterruptedException

Creates the path in ZooKeeper, creating each node as necessary. e.g. If path=/solr/group/node and none of the nodes, solr, group, node exist, each will be created.

Throws:

org.apache.zookeeper.KeeperException

InterruptedException

makePath

public void makePath(String path,
                     boolean failOnExists,
                     boolean retryOnConnLoss)
              throws org.apache.zookeeper.KeeperException,
                     InterruptedException

Throws:

org.apache.zookeeper.KeeperException

InterruptedException

makePath

public void makePath(String path,
                     File file,
                     boolean failOnExists,
                     boolean retryOnConnLoss)
              throws IOException,
                     org.apache.zookeeper.KeeperException,
                     InterruptedException

Throws:

IOException

org.apache.zookeeper.KeeperException

InterruptedException

makePath

public void makePath(String path,
                     File file,
                     boolean retryOnConnLoss)
              throws IOException,
                     org.apache.zookeeper.KeeperException,
                     InterruptedException

Throws:

IOException

org.apache.zookeeper.KeeperException

InterruptedException

makePath

public void makePath(String path,
                     org.apache.zookeeper.CreateMode createMode,
                     boolean retryOnConnLoss)
              throws org.apache.zookeeper.KeeperException,
                     InterruptedException

Throws:

org.apache.zookeeper.KeeperException

InterruptedException

makePath

public void makePath(String path,
                     byte[] data,
                     boolean retryOnConnLoss)
              throws org.apache.zookeeper.KeeperException,
                     InterruptedException

Creates the path in ZooKeeper, creating each node as necessary.

Parameters:

data - to set on the last zkNode

Throws:

org.apache.zookeeper.KeeperException

InterruptedException

makePath

public void makePath(String path,
                     byte[] data,
                     org.apache.zookeeper.CreateMode createMode,
                     boolean retryOnConnLoss)
              throws org.apache.zookeeper.KeeperException,
                     InterruptedException

Creates the path in ZooKeeper, creating each node as necessary. e.g. If path=/solr/group/node and none of the nodes, solr, group, node exist, each will be created.

Parameters:

data - to set on the last zkNode

Throws:

org.apache.zookeeper.KeeperException

InterruptedException

makePath

public void makePath(String path,
                     byte[] data,
                     org.apache.zookeeper.CreateMode createMode,
                     org.apache.zookeeper.Watcher watcher,
                     boolean retryOnConnLoss)
              throws org.apache.zookeeper.KeeperException,
                     InterruptedException

Creates the path in ZooKeeper, creating each node as necessary. e.g. If path=/solr/group/node and none of the nodes, solr, group, node exist, each will be created.

Parameters:

data - to set on the last zkNode

Throws:

org.apache.zookeeper.KeeperException

InterruptedException

makePath

public void makePath(String path,
                     byte[] data,
                     org.apache.zookeeper.CreateMode createMode,
                     org.apache.zookeeper.Watcher watcher,
                     boolean failOnExists,
                     boolean retryOnConnLoss)
              throws org.apache.zookeeper.KeeperException,
                     InterruptedException

Creates the path in ZooKeeper, creating each node as necessary. e.g. If path=/solr/group/node and none of the nodes, solr, group, node exist, each will be created.

Parameters:

data - to set on the last zkNode

Throws:

org.apache.zookeeper.KeeperException

InterruptedException

makePath

public void makePath(String path,
                     byte[] data,
                     org.apache.zookeeper.CreateMode createMode,
                     org.apache.zookeeper.Watcher watcher,
                     boolean failOnExists,
                     boolean retryOnConnLoss,
                     int skipPathParts)
              throws org.apache.zookeeper.KeeperException,
                     InterruptedException

Creates the path in ZooKeeper, creating each node as necessary. e.g. If path=/solr/group/node and none of the nodes, solr, group, node exist, each will be created. skipPathParts will force the call to fail if the first skipPathParts do not exist already. Note: retryOnConnLoss is only respected for the final node - nodes before that are always retried on connection loss.

Throws:

org.apache.zookeeper.KeeperException

InterruptedException

makePath

public void makePath(String zkPath,
                     org.apache.zookeeper.CreateMode createMode,
                     org.apache.zookeeper.Watcher watcher,
                     boolean retryOnConnLoss)
              throws org.apache.zookeeper.KeeperException,
                     InterruptedException

Throws:

org.apache.zookeeper.KeeperException

InterruptedException

setData

public org.apache.zookeeper.data.Stat setData(String path,
                                              byte[] data,
                                              boolean retryOnConnLoss)
                                       throws org.apache.zookeeper.KeeperException,
                                              InterruptedException

Write data to ZooKeeper.

Throws:

org.apache.zookeeper.KeeperException

InterruptedException

setData

public org.apache.zookeeper.data.Stat setData(String path,
                                              File file,
                                              boolean retryOnConnLoss)
                                       throws IOException,
                                              org.apache.zookeeper.KeeperException,
                                              InterruptedException

Write file to ZooKeeper - default system encoding used.

Parameters:

path - path to upload file to e.g. /solr/conf/solrconfig.xml

file - path to file to be uploaded

Throws:

IOException

org.apache.zookeeper.KeeperException

InterruptedException

multi

public List<org.apache.zookeeper.OpResult> multi(Iterable<org.apache.zookeeper.Op> ops,
                                                 boolean retryOnConnLoss)
                                          throws InterruptedException,
                                                 org.apache.zookeeper.KeeperException

Throws:

InterruptedException

org.apache.zookeeper.KeeperException

printLayout

public void printLayout(String path,
                        int indent,
                        StringBuilder string)
                 throws org.apache.zookeeper.KeeperException,
                        InterruptedException

Fills string with printout of current ZooKeeper layout.

Throws:

org.apache.zookeeper.KeeperException

InterruptedException

printLayoutToStdOut

public void printLayoutToStdOut()
                         throws org.apache.zookeeper.KeeperException,
                                InterruptedException

Prints current ZooKeeper layout to stdout.

Throws:

org.apache.zookeeper.KeeperException

InterruptedException

printLayoutToStream

public void printLayoutToStream(PrintStream out)
                         throws org.apache.zookeeper.KeeperException,
                                InterruptedException

Throws:

org.apache.zookeeper.KeeperException

InterruptedException

prettyPrint

public static String prettyPrint(String input,
                                 int indent)

close

public void close()

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

isClosed

public boolean isClosed()

getSolrZooKeeper

public SolrZooKeeper getSolrZooKeeper()

containsChroot

public static boolean containsChroot(String zkHost)

Validates if zkHost contains a chroot. See http://zookeeper.apache.org/doc/r3.2.2/zookeeperProgrammers.html#ch_zkSessions

checkInterrupted

public static Throwable checkInterrupted(Throwable e)

Check to see if a Throwable is an InterruptedException, and if it is, set the thread interrupt flag

Parameters:

e - the Throwable

Returns:

the Throwable

getZkServerAddress

public String getZkServerAddress()

Returns:

the address of the zookeeper cluster

getZkACLProvider

public ZkACLProvider getZkACLProvider()

setACL

public org.apache.zookeeper.data.Stat setACL(String path,
                                             List<org.apache.zookeeper.data.ACL> acls,
                                             boolean retryOnConnLoss)
                                      throws InterruptedException,
                                             org.apache.zookeeper.KeeperException

Set the ACL on a single node in ZooKeeper. This will replace all existing ACL on that node.

Parameters:

path - path to set ACL on e.g. /solr/conf/solrconfig.xml

acls - a list of ACLs to be applied

retryOnConnLoss - true if the command should be retried on connection loss

Throws:

InterruptedException

org.apache.zookeeper.KeeperException

updateACLs

public void updateACLs(String root)
                throws org.apache.zookeeper.KeeperException,
                       InterruptedException

Update all ACLs for a zk tree based on our configured ZkACLProvider.

Parameters:

root - the root node to recursively update

Throws:

org.apache.zookeeper.KeeperException

InterruptedException

clean

public void clean(String path)
           throws InterruptedException,
                  org.apache.zookeeper.KeeperException

Throws:

InterruptedException

org.apache.zookeeper.KeeperException

upConfig

public void upConfig(Path confPath,
                     String confName)
              throws IOException

Throws:

IOException

listZnode

public String listZnode(String path,
                        Boolean recurse)
                 throws org.apache.zookeeper.KeeperException,
                        InterruptedException,
                        SolrServerException

Throws:

org.apache.zookeeper.KeeperException

InterruptedException

SolrServerException

downConfig

public void downConfig(String confName,
                       Path confPath)
                throws IOException

Throws:

IOException

zkTransfer

public void zkTransfer(String src,
                       Boolean srcIsZk,
                       String dst,
                       Boolean dstIsZk,
                       Boolean recurse)
                throws SolrServerException,
                       org.apache.zookeeper.KeeperException,
                       InterruptedException,
                       IOException

Throws:

SolrServerException

org.apache.zookeeper.KeeperException

InterruptedException

IOException

moveZnode

public void moveZnode(String src,
                      String dst)
               throws SolrServerException,
                      org.apache.zookeeper.KeeperException,
                      InterruptedException

Throws:

SolrServerException

org.apache.zookeeper.KeeperException

InterruptedException

uploadToZK

public void uploadToZK(Path rootPath,
                       String zkPath,
                       Pattern filenameExclusions)
                throws IOException

Throws:

IOException

downloadFromZK

public void downloadFromZK(String zkPath,
                           Path dir)
                    throws IOException

Throws:

IOException