org.jclouds.rackspace.cloudloadbalancers.functions.ParseNode.java Source code

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Here is the source code for org.jclouds.rackspace.cloudloadbalancers.functions.ParseNode.java

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/**
 * Licensed to jclouds, Inc. (jclouds) under one or more
 * contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  jclouds 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.rackspace.cloudloadbalancers.functions;

import static com.google.common.base.Preconditions.checkNotNull;

import java.util.List;
import java.util.Map;

import javax.inject.Inject;

import org.jclouds.http.HttpRequest;
import org.jclouds.http.HttpResponse;
import org.jclouds.http.functions.ParseJson;
import org.jclouds.rackspace.cloudloadbalancers.domain.Node;
import org.jclouds.rackspace.cloudloadbalancers.domain.Node.Status;
import org.jclouds.rackspace.cloudloadbalancers.domain.internal.BaseNode;
import org.jclouds.rackspace.cloudloadbalancers.functions.ParseMetadata.CLBMetadata;
import org.jclouds.rest.InvocationContext;

import com.google.common.base.Function;
import com.google.common.collect.Iterables;

/**
 * @author Everett Toews
 */
public class ParseNode implements Function<HttpResponse, Node>, InvocationContext<ParseNode> {

    private final ParseJson<Map<String, NodeWithCLBMetadata>> json;

    @Inject
    ParseNode(ParseJson<Map<String, NodeWithCLBMetadata>> json) {
        this.json = checkNotNull(json, "json");
    }

    @Override
    public Node apply(HttpResponse response) {
        Map<String, NodeWithCLBMetadata> map = json.apply(response);

        if (map == null || map.size() == 0)
            return null;

        NodeWithCLBMetadata nodeWithCLBMetadata = Iterables.get(map.values(), 0);
        Node node = Node.builder().address(nodeWithCLBMetadata.getAddress()).port(nodeWithCLBMetadata.getPort())
                .condition(nodeWithCLBMetadata.getCondition()).type(nodeWithCLBMetadata.getType())
                .weight(nodeWithCLBMetadata.getWeight()).id(nodeWithCLBMetadata.id)
                .status(nodeWithCLBMetadata.status)
                .metadata(ParseMetadata.transformCLBMetadataToMetadata(nodeWithCLBMetadata.metadata)).build();

        return node;
    }

    @Override
    public ParseNode setContext(HttpRequest request) {
        return this;
    }

    /**
     * This class is here only to deal with the metadata format in CLB.
     */
    private static class NodeWithCLBMetadata extends BaseNode<Node> {
        private int id;
        private Status status;
        private List<CLBMetadata> metadata;
    }
}