org.apache.pulsar.client.api

Enum SubscriptionType

java.lang.Object

java.lang.Enum<SubscriptionType>

org.apache.pulsar.client.api.SubscriptionType

All Implemented Interfaces:

Serializable, Comparable<SubscriptionType>

@InterfaceAudience.Public
 @InterfaceStability.Stable
public enum SubscriptionType
extends Enum<SubscriptionType>

Types of subscription supported by Pulsar.

Enum Constant Summary

Enum Constants

Enum Constant and Description
Exclusive There can be only 1 consumer on the same topic with the same subscription name.
Failover Multiple consumer will be able to use the same subscription name but only 1 consumer will receive the messages.
Key_Shared Multiple consumer will be able to use the same subscription and all messages with the same key will be dispatched to only one consumer.
Shared Multiple consumer will be able to use the same subscription name and the messages will be dispatched according to a round-robin rotation between the connected consumers.

Method Summary

Modifier and Type	Method and Description
static SubscriptionType	valueOf(String name) Returns the enum constant of this type with the specified name.
static SubscriptionType[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

Exclusive

public static final SubscriptionType Exclusive

There can be only 1 consumer on the same topic with the same subscription name.

Shared

public static final SubscriptionType Shared

Multiple consumer will be able to use the same subscription name and the messages will be dispatched according to a round-robin rotation between the connected consumers.

In this mode, the consumption order is not guaranteed.

Failover

public static final SubscriptionType Failover

Multiple consumer will be able to use the same subscription name but only 1 consumer will receive the messages. If that consumer disconnects, one of the other connected consumers will start receiving messages.

In failover mode, the consumption ordering is guaranteed.

In case of partitioned topics, the ordering is guaranteed on a per-partition basis. The partitions assignments will be split across the available consumers. On each partition, at most one consumer will be active at a given point in time.

Key_Shared

public static final SubscriptionType Key_Shared

Multiple consumer will be able to use the same subscription and all messages with the same key will be dispatched to only one consumer.

Use ordering_key to overwrite the message key for message ordering.

Method Detail

values

public static SubscriptionType[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (SubscriptionType c : SubscriptionType.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static SubscriptionType valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null