com.eucalyptus.network.applicator.ModeSpecificApplicator.java Source code

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Here is the source code for com.eucalyptus.network.applicator.ModeSpecificApplicator.java

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/*************************************************************************
 * Copyright 2009-2016 Eucalyptus Systems, Inc.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 3 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see http://www.gnu.org/licenses/.
 *
 * Please contact Eucalyptus Systems, Inc., 6755 Hollister Ave., Goleta
 * CA 93117, USA or visit http://www.eucalyptus.com/licenses/ if you need
 * additional information or have any questions.
 ************************************************************************/
package com.eucalyptus.network.applicator;

import java.util.EnumSet;
import java.util.Optional;
import com.eucalyptus.cluster.NIProperty;
import com.eucalyptus.cluster.NetworkInfo;
import com.eucalyptus.network.NetworkMode;
import com.eucalyptus.util.TypedKey;
import com.google.common.collect.Iterables;

/**
 * An applicator that is active in specific network modes.
 */
public abstract class ModeSpecificApplicator implements Applicator {

    private static final TypedKey<NetworkMode> MODE_KEY = TypedKey.create("NetworkMode");
    private final EnumSet<NetworkMode> modes;

    protected ModeSpecificApplicator(final EnumSet<NetworkMode> modes) {
        this.modes = modes;
    }

    @Override
    public final void apply(final ApplicatorContext context, final ApplicatorChain chain)
            throws ApplicatorException {
        NetworkMode mode = context.getAttribute(MODE_KEY);
        if (mode == null) {
            mode = extractMode(context.getNetworkInfo());
            context.setAttribute(MODE_KEY, mode);
        }

        if (modes.contains(mode)) {
            modeApply(mode, context, chain);
        } else {
            chain.applyNext(context);
        }
    }

    protected abstract void modeApply(NetworkMode mode, ApplicatorContext context, ApplicatorChain chain)
            throws ApplicatorException;

    private NetworkMode extractMode(final NetworkInfo networkInfo) {
        final Optional<NIProperty> property = networkInfo.getConfiguration().getProperties().stream()
                .filter(prop -> "mode".equals(prop.getName())).findFirst();

        return NetworkMode.fromString(property.map(prop -> Iterables.get(prop.getValues(), 0)).orElse(null),
                NetworkMode.EDGE);
    }
}