org.jclouds.ec2.compute.functions.CreateSecurityGroupIfNeeded.java Source code

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Here is the source code for org.jclouds.ec2.compute.functions.CreateSecurityGroupIfNeeded.java

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/**
 *
 * Copyright (C) 2010 Cloud Conscious, LLC. <info@cloudconscious.com>
 *
 * ====================================================================
 * 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 org.jclouds.ec2.compute.functions;

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

import javax.annotation.Resource;
import javax.inject.Inject;
import javax.inject.Named;
import javax.inject.Singleton;

import org.jclouds.ec2.EC2Client;
import org.jclouds.ec2.compute.domain.RegionNameAndIngressRules;
import org.jclouds.ec2.domain.IpProtocol;
import org.jclouds.ec2.domain.UserIdGroupPair;
import org.jclouds.compute.reference.ComputeServiceConstants;
import org.jclouds.logging.Logger;

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

/**
 * 
 * @author Adrian Cole
 */
@Singleton
public class CreateSecurityGroupIfNeeded implements Function<RegionNameAndIngressRules, String> {
    @Resource
    @Named(ComputeServiceConstants.COMPUTE_LOGGER)
    protected Logger logger = Logger.NULL;
    protected final EC2Client ec2Client;

    @Inject
    public CreateSecurityGroupIfNeeded(EC2Client ec2Client) {
        this.ec2Client = ec2Client;
    }

    @Override
    public String apply(RegionNameAndIngressRules from) {
        createSecurityGroupInRegion(from.getRegion(), from.getName(), from.getPorts());
        return from.getName();
    }

    private void createSecurityGroupInRegion(String region, String name, int... ports) {
        checkNotNull(region, "region");
        checkNotNull(name, "name");
        logger.debug(">> creating securityGroup region(%s) name(%s)", region, name);
        try {
            ec2Client.getSecurityGroupServices().createSecurityGroupInRegion(region, name, name);
            logger.debug("<< created securityGroup(%s)", name);
            for (int port : ports) {
                createIngressRuleForTCPPort(region, name, port);
            }
            if (ports.length > 0) {
                authorizeGroupToItself(region, name);
            }
        } catch (IllegalStateException e) {
            logger.debug("<< reused securityGroup(%s)", name);
        }
    }

    private void createIngressRuleForTCPPort(String region, String name, int port) {
        logger.debug(">> authorizing securityGroup region(%s) name(%s) port(%s)", region, name, port);
        ec2Client.getSecurityGroupServices().authorizeSecurityGroupIngressInRegion(region, name, IpProtocol.TCP,
                port, port, "0.0.0.0/0");
        logger.debug("<< authorized securityGroup(%s)", name);
    }

    private void authorizeGroupToItself(String region, String name) {
        logger.debug(">> authorizing securityGroup region(%s) name(%s) permission to itself", region, name);
        String myOwnerId = Iterables
                .get(ec2Client.getSecurityGroupServices().describeSecurityGroupsInRegion(region), 0).getOwnerId();
        ec2Client.getSecurityGroupServices().authorizeSecurityGroupIngressInRegion(region, name,
                new UserIdGroupPair(myOwnerId, name));
        logger.debug("<< authorized securityGroup(%s)", name);
    }

}