/*
* 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.examples.rackspace.cloudloadbalancers;
import com.google.common.base.Function;
import com.google.common.collect.Iterables;
import com.google.common.collect.Sets;
import com.google.common.io.Closeables;
import org.jclouds.ContextBuilder;
import org.jclouds.rackspace.cloudloadbalancers.v1.CloudLoadBalancersApi;
import org.jclouds.rackspace.cloudloadbalancers.v1.domain.LoadBalancer;
import org.jclouds.rackspace.cloudloadbalancers.v1.domain.Node;
import org.jclouds.rackspace.cloudloadbalancers.v1.features.LoadBalancerApi;
import org.jclouds.rackspace.cloudloadbalancers.v1.features.NodeApi;
import org.jclouds.rackspace.cloudloadbalancers.v1.predicates.LoadBalancerPredicates;
import java.io.Closeable;
import java.io.IOException;
import java.util.Set;
import java.util.concurrent.TimeoutException;
import static org.jclouds.examples.rackspace.cloudloadbalancers.Constants.*;
/**
* This example removes a Node from a Load Balancer.
*
*/
public class RemoveNodes implements Closeable {
private final CloudLoadBalancersApi clbApi;
private final LoadBalancerApi lbApi;
/**
* To get a username and API key see http://www.jclouds.org/documentation/quickstart/rackspace/
*
* The first argument (args[0]) must be your username
* The second argument (args[1]) must be your API key
*/
public static void main(String[] args) throws IOException {
RemoveNodes removeNodes = new RemoveNodes(args[0], args[1]);
try {
LoadBalancer loadBalancer = removeNodes.getLoadBalancer();
Set<Node> nodes = removeNodes.getNodes(loadBalancer);
removeNodes.removeNodesFromLoadBalancer(nodes, loadBalancer);
}
catch (Exception e) {
e.printStackTrace();
}
finally {
removeNodes.close();
}
}
public RemoveNodes(String username, String apiKey) {
clbApi = ContextBuilder.newBuilder(PROVIDER)
.credentials(username, apiKey)
.buildApi(CloudLoadBalancersApi.class);
lbApi = clbApi.getLoadBalancerApiForZone(ZONE);
}
private LoadBalancer getLoadBalancer() {
for (LoadBalancer loadBalancer: lbApi.list().concat()) {
if (loadBalancer.getName().startsWith(NAME)) {
return loadBalancer;
}
}
throw new RuntimeException(NAME + " not found. Run a CreateLoadBalancer* example first.");
}
private Set<Node> getNodes(LoadBalancer loadBalancer) {
NodeApi nodeApi = clbApi.getNodeApiForZoneAndLoadBalancer(ZONE, loadBalancer.getId());
Set<Node> nodes = Sets.newHashSet();
for (Node node: nodeApi.list().concat()) {
if (node.getAddress().startsWith("10.180.1")) {
nodes.add(node);
}
}
return nodes;
}
private void removeNodesFromLoadBalancer(Set<Node> nodes, LoadBalancer loadBalancer) throws TimeoutException {
System.out.format("Remove Nodes%n");
NodeApi nodeApi = clbApi.getNodeApiForZoneAndLoadBalancer(ZONE, loadBalancer.getId());
Iterable<Integer> nodeIds = Iterables.transform(nodes, new NodeToId());
nodeApi.remove(nodeIds);
// Wait for the Load Balancer to become Active before moving on
// If you want to know what's happening during the polling, enable logging. See
// /jclouds-example/rackspace/src/main/java/org/jclouds/examples/rackspace/Logging.java
if (!LoadBalancerPredicates.awaitAvailable(lbApi).apply(loadBalancer)) {
throw new TimeoutException("Timeout on loadBalancer: " + loadBalancer);
}
System.out.format(" %s%n", nodeIds);
}
private static class NodeToId implements Function<Node, Integer> {
@Override
public Integer apply(Node node) {
return node.getId();
}
}
/**
* Always close your service when you're done with it.
*
* Note that closing quietly like this is not necessary in Java 7.
* You would use try-with-resources in the main method instead.
*/
public void close() throws IOException {
Closeables.close(clbApi, true);
}
}