org.apache.whirr
Class RolePredicates

java.lang.Object
  org.apache.whirr.RolePredicates

public class RolePredicates
extends Object

Predicates for matching Cluster.Instances with certain cluster roles.

Constructor Summary

RolePredicates()

Method Summary

static com.google.common.base.Predicate<Cluster.Instance>	allRolesIn(Set<String> roles)
static com.google.common.base.Predicate<Cluster.Instance>	anyRoleIn(Set<String> roles)
static com.google.common.base.Predicate<Cluster.Instance>	onlyRolesIn(Set<String> roles)
static com.google.common.base.Predicate<Cluster.Instance>	role(String role)
static com.google.common.base.Predicate<Cluster.Instance>	withIds(Set<String> ids)
static com.google.common.base.Predicate<Cluster.Instance>	withIds(String... ids)

Methods inherited from class java.lang.Object

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

Constructor Detail

RolePredicates

public RolePredicates()

Method Detail

role

public static com.google.common.base.Predicate<Cluster.Instance> role(String role)

Parameters:

role -

Returns:

A Predicate that matches Cluster.Instances whose roles include role.

onlyRolesIn

public static com.google.common.base.Predicate<Cluster.Instance> onlyRolesIn(Set<String> roles)

Parameters:

roles -

Returns:

A Predicate that matches Cluster.Instances whose roles are exactly the same as those in roles.

allRolesIn

public static com.google.common.base.Predicate<Cluster.Instance> allRolesIn(Set<String> roles)

Parameters:

roles -

Returns:

A Predicate that matches Cluster.Instances whose roles contain all of roles.

anyRoleIn

public static com.google.common.base.Predicate<Cluster.Instance> anyRoleIn(Set<String> roles)

Parameters:

roles -

Returns:

A Predicate that matches Cluster.Instances whose roles contain at least one of roles.

withIds

public static com.google.common.base.Predicate<Cluster.Instance> withIds(String... ids)

Parameters:

ids - list of instance ids

Returns:

A Predicate that matches Cluster.Instance whose id is found in the IDs list

withIds

public static com.google.common.base.Predicate<Cluster.Instance> withIds(Set<String> ids)

Parameters:

ids - list of instance ids

Returns:

A Predicate that matches Cluster.Instance whose id is found in the IDs list