io.vertx.rxjava.pgclient.pubsub

Class PgSubscriber

java.lang.Object

io.vertx.rxjava.pgclient.pubsub.PgSubscriber

public class PgSubscriber
extends Object

A class for managing subscriptions using LISTEN/UNLISTEN to Postgres channels.

The subscriber manages a single connection to Postgres.

NOTE: This class has been automatically generated from the original non RX-ified interface using Vert.x codegen.

Field Summary

Fields

Modifier and Type	Field and Description
static io.vertx.lang.rx.TypeArg<PgSubscriber>	__TYPE_ARG

Constructor Summary

Constructors

Constructor and Description
PgSubscriber(Object delegate)
PgSubscriber(PgSubscriber delegate)

Method Summary

Modifier and Type	Method and Description
PgConnection	actualConnection()
PgChannel	channel(String name) Return a channel for the given name.
void	close() Close the subscriber, the retry policy will not be invoked.
boolean	closed()
PgSubscriber	closeHandler(Handler<Void> handler) Set an handler called when the subscriber is closed.
PgSubscriber	connect(Handler<AsyncResult<Void>> handler) Connect the subscriber to Postgres.
boolean	equals(Object o)
PgSubscriber	getDelegate()
int	hashCode()
static PgSubscriber	newInstance(PgSubscriber arg)
PgSubscriber	reconnectPolicy(java.util.function.Function<Integer,Long> policy) Set the reconnect policy that is executed when the subscriber is disconnected.
Single<Void>	rxConnect() Connect the subscriber to Postgres.
static PgSubscriber	subscriber(Vertx vertx, PgConnectOptions options) Create a subscriber.
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

__TYPE_ARG

public static final io.vertx.lang.rx.TypeArg<PgSubscriber> __TYPE_ARG

Constructor Detail

PgSubscriber

public PgSubscriber(PgSubscriber delegate)

PgSubscriber

public PgSubscriber(Object delegate)

Method Detail

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

getDelegate

public PgSubscriber getDelegate()

subscriber

public static PgSubscriber subscriber(Vertx vertx,
                                      PgConnectOptions options)

Create a subscriber.

Parameters:

vertx - the vertx instance

options - the connect options

Returns:

the subscriber

channel

public PgChannel channel(String name)

Return a channel for the given name.

Parameters:

name - the channel name

This will be the name of the channel exactly as held by Postgres for sending notifications. Internally this name will be truncated to the Postgres identifier maxiumum length of (NAMEDATALEN = 64) - 1 == 63 characters, and prepared as a quoted identifier without unicode escape sequence support for use in LISTEN/UNLISTEN commands. Examples of channel names and corresponding NOTIFY commands:

• when name == "the_channel": NOTIFY the_channel, 'msg', NOTIFY The_Channel, 'msg', or NOTIFY "the_channel", 'msg' succeed in delivering a message to the created channel
• when name == "The_Channel": NOTIFY "The_Channel", 'msg', succeeds in delivering a message to the created channel

Returns:

the channel

connect

public PgSubscriber connect(Handler<AsyncResult<Void>> handler)

Connect the subscriber to Postgres.

Parameters:

handler - the handler notified of the connection success or failure

Returns:

a reference to this, so the API can be used fluently

rxConnect

public Single<Void> rxConnect()

Connect the subscriber to Postgres.

Returns:

a reference to this, so the API can be used fluently

reconnectPolicy

public PgSubscriber reconnectPolicy(java.util.function.Function<Integer,Long> policy)

Set the reconnect policy that is executed when the subscriber is disconnected.

When the subscriber is disconnected, the policy function is called with the actual number of retries and returns an amountOfTime value:

• when amountOfTime < 0: the subscriber is closed and there is no retry
• when amountOfTime == 0: the subscriber retries to connect immediately
• when amountOfTime > 0: the subscriber retries after amountOfTime milliseconds

The default policy does not perform any retries.

Parameters:

policy - the policy to set

Returns:

a reference to this, so the API can be used fluently

closeHandler

public PgSubscriber closeHandler(Handler<Void> handler)

Set an handler called when the subscriber is closed.

Parameters:

handler - the handler

Returns:

a reference to this, so the API can be used fluently

actualConnection

public PgConnection actualConnection()

Returns:

the actual connection to Postgres, it might be null

closed

public boolean closed()

Returns:

whether the subscriber is closed

close

public void close()

Close the subscriber, the retry policy will not be invoked.

newInstance

public static PgSubscriber newInstance(PgSubscriber arg)