Java tutorial
/* * Copyright (c) 2014 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.helios.agent; import com.google.common.base.Optional; import com.google.common.collect.ImmutableList; import com.google.common.collect.Lists; import com.google.common.net.InetAddresses; import com.spotify.docker.client.messages.ContainerConfig; import com.spotify.docker.client.messages.HostConfig; import com.spotify.docker.client.messages.ImageInfo; import com.spotify.helios.common.descriptors.Job; import java.util.Collections; import java.util.List; /** ContainerDecorator that adds to {@link HostConfig#extraHosts}. */ public class AddExtraHostContainerDecorator implements ContainerDecorator { private final List<String> extraHosts; public AddExtraHostContainerDecorator(final List<String> extraHosts) { this.extraHosts = ImmutableList.copyOf(extraHosts); } @Override public void decorateHostConfig(final Job job, final Optional<String> dockerVersion, final HostConfig.Builder hostConfig) { final List<String> hosts = Lists.newArrayList(); hosts.addAll(this.extraHosts); //TODO write better backwards copatiblity hosts.addAll(Optional.fromNullable(job.getExtraHosts()).or(Collections.emptySet())); hostConfig.extraHosts(hosts); } @Override public void decorateContainerConfig(final Job job, final ImageInfo imageInfo, final Optional<String> dockerVersion, final ContainerConfig.Builder containerConfig) { //do nothing } /** * Validates that the argument has form "host:ip-address". Does not validate the form of the * hostname argument, but checks that the second half is valid via {@link * InetAddresses#isInetAddress}. */ public static boolean isValidArg(String arg) { final String[] args = arg.split(":"); if (args.length != 2) { return false; } final String ip = args[1]; return InetAddresses.isInetAddress(ip); } }