/
MongoContainerFactory.java
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/
MongoContainerFactory.java
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/*
* Copyright (c) 2020 Contributors to the Eclipse Foundation
*
* See the NOTICE file(s) distributed with this work for additional
* information regarding copyright ownership.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0
*
* SPDX-License-Identifier: EPL-2.0
*/
package org.eclipse.ditto.services.utils.test.mongo;
import java.util.Arrays;
import java.util.List;
import java.util.Optional;
import com.github.dockerjava.api.DockerClient;
import com.github.dockerjava.api.model.ExposedPort;
import com.github.dockerjava.api.model.HostConfig;
import com.github.dockerjava.api.model.Image;
import com.github.dockerjava.api.model.PortBinding;
import com.github.dockerjava.api.model.Ports;
import com.github.dockerjava.core.DefaultDockerClientConfig;
import com.github.dockerjava.core.DockerClientImpl;
import com.github.dockerjava.zerodep.ZerodepDockerHttpClient;
/**
* Responsible for creating and configuring the mongo db docker container that should be started for tests.
*/
final class MongoContainerFactory {
private static final String MONGO_IMAGE_NAME = "mongo";
private static final String MONGO_VERSION = "4.2";
private static final String MONGO_IMAGE_IDENTIFIER = MONGO_IMAGE_NAME + ":" + MONGO_VERSION;
private static final int MONGO_INTERNAL_PORT = 27017;
private static final PortBinding MONGO_PORT_BINDING_TO_RANDOM_PORT =
new PortBinding(Ports.Binding.empty(), ExposedPort.tcp(MONGO_INTERNAL_PORT));
private static final List<String> MONGO_COMMANDS = Arrays.asList("mongod", "--storageEngine", "wiredTiger");
private static final MongoContainerFactory INSTANCE = new MongoContainerFactory();
private static final String UNIX_DOCKER_HOST = "unix:///var/run/docker.sock";
private static final String WINDOWS_DOCKER_HOST = "tcp://localhost:2375";
private final DockerClient dockerClient;
private MongoContainerFactory() {
final String dockerHost = OsDetector.isWindows() ? WINDOWS_DOCKER_HOST : UNIX_DOCKER_HOST;
final DefaultDockerClientConfig config =
DefaultDockerClientConfig.createDefaultConfigBuilder().withDockerHost(dockerHost).build();
final ZerodepDockerHttpClient httpClient = new ZerodepDockerHttpClient.Builder()
.dockerHost(config.getDockerHost())
.sslConfig(config.getSSLConfig())
.build();
dockerClient = DockerClientImpl.getInstance(config, httpClient);
if (isMongoImageAbsent()) {
pullMongoImage();
}
}
/**
* @return returns the singleton instance of this factory.
*/
static MongoContainerFactory getInstance() {
return INSTANCE;
}
/**
* Creates the mongo docker container with all required configuration and returns it.
* It's not started after it has been returned.
*
* @return the created {@link DockerContainer}.
*/
DockerContainer createMongoContainer() {
return getMongoImageId()
.map(imageId -> dockerClient.createContainerCmd(imageId)
.withCmd(MONGO_COMMANDS)
.withHostConfig(HostConfig.newHostConfig().withPortBindings(MONGO_PORT_BINDING_TO_RANDOM_PORT))
.exec()
.getId())
.map(containerId -> new DockerContainer(dockerClient, containerId))
.orElseThrow(
() -> new IllegalStateException("Could not create container because no image was present.")
);
}
private boolean isMongoImageAbsent() {
return getMongoImageId().isEmpty();
}
private Optional<String> getMongoImageId() {
return dockerClient.listImagesCmd()
.withImageNameFilter(MONGO_IMAGE_IDENTIFIER)
.exec()
.stream()
.findFirst()
.map(Image::getId);
}
private void pullMongoImage() {
final DockerImagePullHandler dockerImagePullHandler = DockerImagePullHandler.newInstance();
dockerClient.pullImageCmd(MONGO_IMAGE_IDENTIFIER).exec(dockerImagePullHandler);
dockerImagePullHandler.getImagePullFuture().join();
}
}