com.spotify.docker.client.auth.MultiRegistryAuthSupplier.java Source code

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Here is the source code for com.spotify.docker.client.auth.MultiRegistryAuthSupplier.java

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/*-
 * -\-\-
 * docker-client
 * --
 * Copyright (C) 2016 - 2017 Spotify AB
 * --
 * 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.spotify.docker.client.auth;

import com.google.common.collect.Lists;
import com.spotify.docker.client.exceptions.DockerException;
import com.spotify.docker.client.messages.RegistryAuth;
import com.spotify.docker.client.messages.RegistryConfigs;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * A RegistryAuthSupplier that combines authentication info from multiple RegistryAuthSupplier
 * instances.
 *
 * <p>The order of the suppliers matters: RegistryAuthSuppliers earlier in the list are
 * checked first to see if they can handle authentication for the given operation before trying
 * later RegistryAuthSuppliers in the list (a RegistryAuthSupplier signals that it can't handle the
 * operation by returning {@code null}).</p>
 */
public class MultiRegistryAuthSupplier implements RegistryAuthSupplier {

    private final List<RegistryAuthSupplier> suppliers;

    public MultiRegistryAuthSupplier(final List<RegistryAuthSupplier> suppliers) {
        this.suppliers = suppliers;
    }

    @Override
    public RegistryAuth authFor(final String imageName) throws DockerException {
        for (RegistryAuthSupplier supplier : suppliers) {
            final RegistryAuth auth = supplier.authFor(imageName);
            if (auth != null) {
                return auth;
            }
        }
        return null;
    }

    @Override
    public RegistryAuth authForSwarm() throws DockerException {
        for (RegistryAuthSupplier supplier : suppliers) {
            final RegistryAuth auth = supplier.authForSwarm();
            if (auth != null) {
                return auth;
            }
        }
        return null;

    }

    @Override
    public RegistryConfigs authForBuild() throws DockerException {
        final Map<String, RegistryAuth> allConfigs = new HashMap<>();
        // iterate through suppliers in reverse so that the earlier suppliers in the list
        // have precedence
        for (RegistryAuthSupplier supplier : Lists.reverse(suppliers)) {
            final RegistryConfigs configs = supplier.authForBuild();
            if (configs != null && configs.configs() != null) {
                allConfigs.putAll(configs.configs());
            }
        }
        return RegistryConfigs.create(allConfigs);
    }
}