The Zookeeper class

(PECL zookeeper >= 0.1.0)

Einführung

Represents ZooKeeper session.

Klassenbeschreibung

class Zookeeper {

/* Methoden */

public __construct(string $host = '', callable $watcher_cb = null, int $recv_timeout = 10000)

public addAuth(string $scheme, string $cert, callable $completion_cb = null): bool

public close(): void

public connect(string $host, callable $watcher_cb = null, int $recv_timeout = 10000): void

public create(
    string $path,
    string $value,
    array $acls,
    int $flags = null
): string

public delete(string $path, int $version = -1): bool

public exists(string $path, callable $watcher_cb = null): array

public get(
    string $path,
    callable $watcher_cb = null,
    array &$stat = null,
    int $max_size = 0
): string

public getAcl(string $path): array

public getChildren(string $path, callable $watcher_cb = null): array

public getClientId(): int

public getConfig(): ZookeeperConfig

public getRecvTimeout(): int

public getState(): int

public isRecoverable(): bool

public set(
    string $path,
    string $value,
    int $version = -1,
    array &$stat = null
): bool

public setAcl(string $path, int $version, array $acl): bool

public static setDebugLevel(int $logLevel): bool

public static setDeterministicConnOrder(bool $yesOrNo): bool

public setLogStream(resource $stream): bool

public setWatcher(callable $watcher_cb): bool

/* Konstanten */

const int PERM_READ = 1;

const int PERM_WRITE = 2;

const int PERM_CREATE = 4;

const int PERM_DELETE = 8;

const int PERM_ADMIN = 16;

const int PERM_ALL = 31;

const int EPHEMERAL = 1;

const int SEQUENCE = 2;

const int LOG_LEVEL_ERROR = 1;

const int LOG_LEVEL_WARN = 2;

const int LOG_LEVEL_INFO = 3;

const int LOG_LEVEL_DEBUG = 4;

const int EXPIRED_SESSION_STATE = -112;

const int AUTH_FAILED_STATE = -113;

const int CONNECTING_STATE = 1;

const int ASSOCIATING_STATE = 2;

const int CONNECTED_STATE = 3;

const int READONLY_STATE = 5;

const int NOTCONNECTED_STATE = 999;

const int CREATED_EVENT = 1;

const int DELETED_EVENT = 2;

const int CHANGED_EVENT = 3;

const int CHILD_EVENT = 4;

const int SESSION_EVENT = -1;

const int NOTWATCHING_EVENT = -2;

const int SYSTEMERROR = -1;

const int RUNTIMEINCONSISTENCY = -2;

const int DATAINCONSISTENCY = -3;

const int CONNECTIONLOSS = -4;

const int MARSHALLINGERROR = -5;

const int UNIMPLEMENTED = -6;

const int OPERATIONTIMEOUT = -7;

const int BADARGUMENTS = -8;

const int INVALIDSTATE = -9;

const int NEWCONFIGNOQUORUM = -13;

const int RECONFIGINPROGRESS = -14;

const int OK = 0;

const int APIERROR = -100;

const int NONODE = -101;

const int NOAUTH = -102;

const int BADVERSION = -103;

const int NOCHILDRENFOREPHEMERALS = -108;

const int NODEEXISTS = -110;

const int NOTEMPTY = -111;

const int SESSIONEXPIRED = -112;

const int INVALIDCALLBACK = -113;

const int INVALIDACL = -114;

const int AUTHFAILED = -115;

const int CLOSING = -116;

const int NOTHING = -117;

const int SESSIONMOVED = -118;

const int NOTREADONLY = -119;

const int EPHEMERALONLOCALSESSION = -120;

const int NOWATCHER = -121;

const int RECONFIGDISABLED = -122;

}

Vordefinierte Konstanten

ZooKeeper Permissions

Zookeeper::PERM_READ: Can read nodes value and list its children
Zookeeper::PERM_WRITE: Can set the nodes value
Zookeeper::PERM_CREATE: Can create children
Zookeeper::PERM_DELETE: Can delete children
Zookeeper::PERM_ADMIN: Can execute set_acl()
Zookeeper::PERM_ALL: All of the above flags ORd together

ZooKeeper Create Flags

Zookeeper::EPHEMERAL: If Zookeeper::EPHEMERAL flag is set, the node will automatically get removed if the client session goes away.
Zookeeper::SEQUENCE: If the Zookeeper::SEQUENCE flag is set, a unique monotonically increasing sequence number is appended to the path name. The sequence number is always fixed length of 10 digits, 0 padded.

ZooKeeper Log Levels

Zookeeper::LOG_LEVEL_ERROR: Outputs only error mesages
Zookeeper::LOG_LEVEL_WARN: Outputs errors/warnings
Zookeeper::LOG_LEVEL_INFO: Outputs big action messages besides errors/warnings
Zookeeper::LOG_LEVEL_DEBUG: Outputs all

ZooKeeper States

Zookeeper::EXPIRED_SESSION_STATE: Connected but session expired
Zookeeper::AUTH_FAILED_STATE: Connected but auth failed
Zookeeper::CONNECTING_STATE: Connecting
Zookeeper::ASSOCIATING_STATE: Associating
Zookeeper::CONNECTED_STATE: Connected
Zookeeper::READONLY_STATE: TODO: help us improve this extension.
Zookeeper::NOTCONNECTED_STATE: Connection failed

ZooKeeper Watch Types

Zookeeper::CREATED_EVENT

A node has been created

This is only generated by watches on non-existent nodes. These watches are set using Zookeeper::exists.

Zookeeper::DELETED_EVENT

A node has been deleted

This is only generated by watches on nodes. These watches are set using Zookeeper::exists and Zookeeper::get.

Zookeeper::CHANGED_EVENT

A node has changed

This is only generated by watches on nodes. These watches are set using Zookeeper::exists and Zookeeper::get.

Zookeeper::CHILD_EVENT

A change as occurred in the list of children

This is only generated by watches on the child list of a node. These watches are set using Zookeeper::getChildren.

Zookeeper::SESSION_EVENT

A session has been lost

This is generated when a client loses contact or reconnects with a server.

Zookeeper::NOTWATCHING_EVENT

A watch has been removed

This is generated when the server for some reason, probably a resource constraint, will no longer watch a node for a client.

ZooKeeper System and Server-side Errors

Zookeeper::SYSTEMERROR

This is never thrown by the server, it shouldn't be used other than to indicate a range. Specifically error codes greater than this value, but lesser than Zookeeper::APIERROR, are system errors.

Zookeeper::RUNTIMEINCONSISTENCY

A runtime inconsistency was found.

Zookeeper::DATAINCONSISTENCY

A data inconsistency was found.

Zookeeper::CONNECTIONLOSS

Connection to the server has been lost.

Zookeeper::MARSHALLINGERROR

Error while marshalling or unmarshalling data.

Zookeeper::UNIMPLEMENTED

Operation is unimplemented.

Zookeeper::OPERATIONTIMEOUT

Operation timeout.

Zookeeper::BADARGUMENTS

Invalid arguments.

Zookeeper::INVALIDSTATE

Invliad zhandle state.

Zookeeper::NEWCONFIGNOQUORUM

No quorum of new config is connected and up-to-date with the leader of last committed config - try invoking reconfiguration after new servers are connected and synced.

Available as of ZooKeeper 3.5.0

Zookeeper::RECONFIGINPROGRESS

Reconfiguration requested while another reconfiguration is currently in progress. This is currently not supported. Please retry.

Available as of ZooKeeper 3.5.0

ZooKeeper API Errors

Zookeeper::OK: Everything is OK.
Zookeeper::APIERROR: This is never thrown by the server, it shouldn't be used other than to indicate a range. Specifically error codes greater than this value are API errors (while values less than this indicate a Zookeeper::SYSTEMERROR).
Zookeeper::NONODE: Node does not exist.
Zookeeper::NOAUTH: Not authenticated.
Zookeeper::BADVERSION: Version conflict.
Zookeeper::NOCHILDRENFOREPHEMERALS: Ephemeral nodes may not have children.
Zookeeper::NODEEXISTS: The node already exists.
Zookeeper::NOTEMPTY: The node has children.
Zookeeper::SESSIONEXPIRED: The session has been expired by the server.
Zookeeper::INVALIDCALLBACK: Invalid callback specified.
Zookeeper::INVALIDACL: Invalid ACL specified.
Zookeeper::AUTHFAILED: Client authentication failed.
Zookeeper::CLOSING: ZooKeeper is closing.
Zookeeper::NOTHING: (not error) No server responses to process.
Zookeeper::SESSIONMOVED: Session moved to another server, so operation is ignored.
Zookeeper::NOTREADONLY: State-changing request is passed to read-only server.
Zookeeper::EPHEMERALONLOCALSESSION: Attempt to create ephemeral node on a local session.
Zookeeper::NOWATCHER: The watcher couldn't be found.
Zookeeper::RECONFIGDISABLED: Attempts to perform a reconfiguration operation when reconfiguration feature is disabled.

Inhaltsverzeichnis

Zookeeper::addAuth — Specify application credentials
Zookeeper::close — Close the zookeeper handle and free up any resources
Zookeeper::connect — Create a handle to used communicate with zookeeper
Zookeeper::__construct — Create a handle to used communicate with zookeeper
Zookeeper::create — Create a node synchronously
Zookeeper::delete — Delete a node in zookeeper synchronously
Zookeeper::exists — Checks the existence of a node in zookeeper synchronously
Zookeeper::get — Gets the data associated with a node synchronously
Zookeeper::getAcl — Gets the acl associated with a node synchronously
Zookeeper::getChildren — Lists the children of a node synchronously
Zookeeper::getClientId — Return the client session id, only valid if the connections is currently connected (ie. last watcher state is ZOO_CONNECTED_STATE)
Zookeeper::getConfig — Get instance of ZookeeperConfig
Zookeeper::getRecvTimeout — Return the timeout for this session, only valid if the connections is currently connected (ie. last watcher state is ZOO_CONNECTED_STATE). This value may change after a server re-connect
Zookeeper::getState — Get the state of the zookeeper connection
Zookeeper::isRecoverable — Checks if the current zookeeper connection state can be recovered
Zookeeper::set — Sets the data associated with a node
Zookeeper::setAcl — Sets the acl associated with a node synchronously
Zookeeper::setDebugLevel — Sets the debugging level for the library
Zookeeper::setDeterministicConnOrder — Enable/disable quorum endpoint order randomization
Zookeeper::setLogStream — Sets the stream to be used by the library for logging
Zookeeper::setWatcher — Set a watcher function

Hier Kannst Du einen Kommentar verfassen

Es sind noch keine Kommentare vorhanden.

The Zookeeper class

Einführung

Klassenbeschreibung

Vordefinierte Konstanten

ZooKeeper Permissions

ZooKeeper Create Flags

ZooKeeper Log Levels

ZooKeeper States

ZooKeeper Watch Types

ZooKeeper System and Server-side Errors

ZooKeeper API Errors

Inhaltsverzeichnis

Hier Kannst Du einen Kommentar verfassen

PHP cURL-Tutorial: Verwendung von cURL zum Durchführen von HTTP-Anfragen

Midjourney Tutorial - Anleitung für Anfänger

Grundlagen von Views in MySQL

Tutorial veröffentlichen

Teile Dein Wissen mit anderen Entwicklern weltweit

Ein data POST via Curl funktioniert nicht.

Ein data POST via Curl funktioniert nicht.

Probleme mit einem Linux-Befehl...

ein .htaccess-File für eine WordPress-Installation - wie gehe ich hier vor.?

The Zookeeper class

Einführung

Klassenbeschreibung

Vordefinierte Konstanten

ZooKeeper Permissions

ZooKeeper Create Flags

ZooKeeper Log Levels

ZooKeeper States

ZooKeeper Watch Types

ZooKeeper System and Server-side Errors

ZooKeeper API Errors

Inhaltsverzeichnis

Hier Kannst Du einen Kommentar verfassen

PHP cURL-Tutorial: Verwendung von cURL zum Durchführen von HTTP-Anfragen

Midjourney Tutorial - Anleitung für Anfänger

Grundlagen von Views in MySQL

Tutorial veröffentlichen

Teile Dein Wissen mit anderen Entwicklern weltweit

Ein data POST via Curl funktioniert nicht.

Ein data POST via Curl funktioniert nicht.

Probleme mit einem Linux-Befehl...

ein .htaccess-File für eine WordPress-Installation - wie gehe ich hier vor.?

Wird geladen... Bitte warte.