/**
 * Copyright 2016 Netflix, Inc.
 *
 * Licensed 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 com.netflix.dynomitemanager.sidecore.config;

import com.netflix.dynomitemanager.sidecore.utils.SystemUtils;

/**
 * Calls AWS ec2 metadata to get info on the location of the running instance in VPC.
 * Public Hostname will return local-hostname
 * Public IP will return local-ipv4
 */
public class VpcInstanceDataRetriever implements InstanceDataRetriever
{
    public String getRac()
    {
        return SystemUtils.getDataFromUrl("http://169.254.169.254/latest/meta-data/placement/availability-zone");
    }

    public String getPublicHostname()
    {
        return SystemUtils.getDataFromUrl("http://169.254.169.254/latest/meta-data/local-hostname");
    }

    public String getPublicIP()
    {
        return SystemUtils.getDataFromUrl("http://169.254.169.254/latest/meta-data/local-ipv4");
    }

    public String getInstanceId()
    {
        return SystemUtils.getDataFromUrl("http://169.254.169.254/latest/meta-data/instance-id");
    }

    public String getInstanceType()
    {
        return SystemUtils.getDataFromUrl("http://169.254.169.254/latest/meta-data/instance-type");
    }
}

/**
 * Copyright 2016 Netflix, Inc.
 *
 * Licensed 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 com.netflix.dynomitemanager.sidecore.config;

import com.netflix.dynomitemanager.sidecore.utils.SystemUtils;

/**
 * Calls AWS ec2 metadata to get info on the location of the running instance in VPC.
 * Public Hostname will return local-hostname
 * Public IP will return local-ipv4
 */
public class VpcInstanceDataRetriever implements InstanceDataRetriever
{
    public String getRac()
    {
        return SystemUtils.getDataFromUrl("http://169.254.169.254/latest/meta-data/placement/availability-zone");
    }

    public String getPublicHostname()
    {
        return SystemUtils.getDataFromUrl("http://169.254.169.254/latest/meta-data/public-hostname");
    }

    public String getPublicIP()
    {
        return SystemUtils.getDataFromUrl("http://169.254.169.254/latest/meta-data/public-ipv4");
    }

    public String getInstanceId()
    {
        return SystemUtils.getDataFromUrl("http://169.254.169.254/latest/meta-data/instance-id");
    }

    public String getInstanceType()
    {
        return SystemUtils.getDataFromUrl("http://169.254.169.254/latest/meta-data/instance-type");
    }
}

Update VpcInstanceDataRetriever.java