DockerAccessInterfaceImpl.java

/*
 * Copyright 2016 Red Hat, Inc. and/or its affiliates.
 *
 * 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.guvnor.ala.docker.access.impl;

import java.util.Map;

import com.spotify.docker.client.DefaultDockerClient;
import com.spotify.docker.client.DockerCertificateException;
import com.spotify.docker.client.DockerClient;
import com.spotify.docker.client.DockerException;
import com.spotify.docker.client.messages.Info;
import java.util.concurrent.ConcurrentHashMap;
import org.uberfire.commons.lifecycle.Disposable;
import org.guvnor.ala.docker.access.DockerAccessInterface;
import org.guvnor.ala.runtime.providers.ProviderId;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class DockerAccessInterfaceImpl
        implements DockerAccessInterface,
        Disposable {

    protected static final Logger LOG = LoggerFactory.getLogger( DockerAccessInterfaceImpl.class );
    private final Map<String, DockerClient> clientMap = new ConcurrentHashMap<>();

    @Override
    public DockerClient getDockerClient( final ProviderId providerId ) throws DockerException, InterruptedException {
        if ( !clientMap.containsKey( providerId.getId() ) ) {
            clientMap.put( providerId.getId(), buildClient( providerId ) );
        }
        return clientMap.get( providerId.getId() );
    }

    private DockerClient buildClient( final ProviderId providerId ) throws DockerException, InterruptedException {
        DefaultDockerClient dockerClient;
        if ( providerId.getId().equals( "local" ) ) {
            try {
                if ( System.getProperty( "os.name" ).toLowerCase().contains( "mac" ) ) {
                    dockerClient = DefaultDockerClient.builder().uri( DefaultDockerClient.DEFAULT_UNIX_ENDPOINT ).build();
                    // This test the docker client connection to see if the client was built properly
                    Info info = dockerClient.info();
                    LOG.info( "Connected to Docker Client Info: " + info );
                    return dockerClient;
                }
                
                try {
                    dockerClient = DefaultDockerClient.fromEnv().build();
                    Info info = dockerClient.info();
                    LOG.info( "Connected to Docker Client Info: " + info );
                    return dockerClient;
                } catch ( DockerCertificateException ex ) {
                    throw new RuntimeException( ex );
                }

            } catch ( DockerException | InterruptedException ex ) {
                try {
                    dockerClient = DefaultDockerClient.fromEnv().build();
                    Info info = dockerClient.info();
                    LOG.info( "Connected to Docker Client Info: " + info );
                    return dockerClient;

                } catch ( DockerCertificateException e ) {
                    throw new RuntimeException( e );
                }
            }
        }
        throw new RuntimeException( "Couldn't create Docker Client, for providerId = " + providerId.getId() );
    }

    @Override
    public void dispose() {
        clientMap.values().forEach( DockerClient::close );
    }
}