Package org.acemq.rabbitmq.admin

Class PolicyInfo

java.lang.Object

org.acemq.rabbitmq.admin.PolicyInfo

public final class PolicyInfo
extends Object

A policy: settings applied to whatever matches a pattern.

The thing to understand before using one. A queue argument is fixed at declaration and cannot be changed without deleting the queue; a **policy is applied afterwards and can be changed at any time**. So `x-message-ttl` as an argument is permanent, and the same setting as a policy is editable — which is why operators reach for policies and why a topology comparison that only looks at arguments can be confidently wrong.

Two more traps worth knowing:

• Only one policy applies. Where several match, the highest priority wins outright — the definitions are not merged. A queue matching a broad policy and a narrow one gets exactly one of them.
• An argument beats a policy. If a queue was declared with x-message-ttl and a policy also sets it, the argument wins, and the policy appears to do nothing for reasons nothing reports.

Constructor Summary

Constructors

Constructor	Description
PolicyInfo(String name, String vhost, String pattern, String applyTo, Integer priority, Map<String,Object> definition)

Method Summary

Modifier and Type	Method	Description
String	applyTo()
Map<String,Object>	definition()
String	name()
String	pattern()
int	priority()
String	toString()
String	vhost()

Methods inherited from class java.lang.Object

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

Constructor Details

PolicyInfo

public PolicyInfo(String name,
 String vhost,
 String pattern,
 String applyTo,
 Integer priority,
 Map<String,Object> definition)

Method Details

name

public String name()

vhost

public String vhost()

pattern

public String pattern()

Returns:

the regular expression matched against queue and exchange names

applyTo

public String applyTo()

Returns:

queues, exchanges, classic_queues, quorum_queues or all

priority

public int priority()

Returns:

the priority. Where several policies match, the highest wins outright

definition

public Map<String,Object> definition()

Returns:

what the policy sets

toString

public String toString()

Overrides:

toString in class Object