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jclouds components to access compute providers
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jclouds.compute.predicates;
import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.base.Strings.emptyToNull;
import java.util.Set;
import org.jclouds.compute.domain.ComputeMetadata;
import org.jclouds.compute.domain.NodeMetadata;
import org.jclouds.compute.domain.NodeMetadata.Status;
import com.google.common.base.Predicate;
import com.google.common.base.Predicates;
import com.google.common.collect.ImmutableSet;
/**
* Container for node filters (predicates).
*
* This class has static methods that create customized predicates to use with
* {@link org.jclouds.compute.ComputeService}.
*/
public class NodePredicates {
private static class ParentLocationId implements Predicate {
private final String id;
private ParentLocationId(String id) {
this.id = id;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((id == null) ? 0 : id.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
ParentLocationId other = (ParentLocationId) obj;
if (id == null) {
if (other.id != null)
return false;
} else if (!id.equals(other.id))
return false;
return true;
}
@Override
public boolean apply(ComputeMetadata nodeMetadata) {
if (nodeMetadata.getLocation().getParent() == null)
return false;
return id.equals(nodeMetadata.getLocation().getParent().getId());
}
@Override
public String toString() {
return "ParentLocationId [id=" + id + "]";
}
}
private static class LocationId implements Predicate {
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((id == null) ? 0 : id.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
LocationId other = (LocationId) obj;
if (id == null) {
if (other.id != null)
return false;
} else if (!id.equals(other.id))
return false;
return true;
}
private final String id;
private LocationId(String id) {
this.id = id;
}
@Override
public boolean apply(ComputeMetadata nodeMetadata) {
return id.equals(nodeMetadata.getLocation().getId());
}
@Override
public String toString() {
return "locationId(" + id + ")";
}
}
/**
* Return nodes in the specified location.
*
* @param id
* id of the location
* @return predicate
*/
public static Predicate locationId(final String id) {
checkNotNull(id, "id must be defined");
return new LocationId(id);
}
/**
* Return nodes in the specified parent location.
*
* @param id
* id of the location
* @return predicate
*/
public static Predicate parentLocationId(final String id) {
checkNotNull(id, "id must be defined");
return new ParentLocationId(id);
}
/**
* Return nodes with the specific ids Note: returns all nodes, regardless of the state.
*
* @param ids
* ids of the resources
* @return predicate
*/
public static Predicate withIds(String... ids) {
checkNotNull(ids, "ids must be defined");
final Set search = ImmutableSet.copyOf(ids);
return new Predicate() {
@Override
public boolean apply(T nodeMetadata) {
return search.contains(nodeMetadata.getId());
}
@Override
public String toString() {
return "withIds(" + search + ")";
}
};
}
/**
* return everything.
*/
public static Predicate all() {
return Predicates. alwaysTrue();
}
/**
* Return nodes in the specified group. Note: returns all nodes, regardless of the state.
*
* @param group
* group to match the items
* @return predicate
*/
public static Predicate inGroup(final String group) {
checkNotNull(emptyToNull(group), "group must be defined");
return new Predicate() {
@Override
public boolean apply(NodeMetadata nodeMetadata) {
return group.equals(nodeMetadata.getGroup());
}
@Override
public String toString() {
return "inGroup(" + group + ")";
}
};
}
/**
* Return nodes who have a value for {@link NodeMetadata#getGroup}
*
*/
public static Predicate hasGroup() {
return new Predicate() {
@Override
public boolean apply(NodeMetadata nodeMetadata) {
return nodeMetadata != null && nodeMetadata.getGroup() != null;
}
@Override
public String toString() {
return "hasGroup()";
}
};
}
/**
* Return nodes with specified group that are in the NODE_RUNNING state.
*
* @param group
* group to match the items
* @return predicate
*/
public static Predicate runningInGroup(final String group) {
checkNotNull(emptyToNull(group), "group must be defined");
return new Predicate() {
@Override
public boolean apply(NodeMetadata nodeMetadata) {
return group.equals(nodeMetadata.getGroup()) && nodeMetadata.getStatus() == Status.RUNNING;
}
@Override
public String toString() {
return "runningInGroup(" + group + ")";
}
};
}
/**
* Match nodes with State == RUNNING
*/
public static final Predicate RUNNING = new Predicate() {
@Override
public boolean apply(NodeMetadata nodeMetadata) {
return nodeMetadata.getStatus() == Status.RUNNING;
}
@Override
public String toString() {
return Status.RUNNING.toString();
}
};
/**
* Match nodes with State == NODE_TERMINATED
*/
public static final Predicate TERMINATED = new Predicate() {
@Override
public boolean apply(NodeMetadata nodeMetadata) {
return nodeMetadata.getStatus() == Status.TERMINATED;
}
@Override
public String toString() {
return Status.TERMINATED.toString();
}
};
/**
* Match nodes with State == SUSPENDED
*/
public static final Predicate SUSPENDED = new Predicate() {
@Override
public boolean apply(NodeMetadata nodeMetadata) {
return nodeMetadata.getStatus() == Status.SUSPENDED;
}
@Override
public String toString() {
return Status.SUSPENDED.toString();
}
};
}
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