io.streamthoughts.kafka.specs.command.acls.subcommands.Describe Maven / Gradle / Ivy

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/*
 * Copyright 2021 StreamThoughts.
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 io.streamthoughts.kafka.specs.command.acls.subcommands;

import io.streamthoughts.kafka.specs.YAMLClusterSpecWriter;
import io.streamthoughts.kafka.specs.resources.acl.AccessControlPolicy;
import io.streamthoughts.kafka.specs.resources.acl.AclRulesBuilder;
import io.streamthoughts.kafka.specs.resources.acl.builder.LiteralAclRulesBuilder;
import io.streamthoughts.kafka.specs.resources.acl.builder.TopicMatchingAclRulesBuilder;
import io.streamthoughts.kafka.specs.command.BaseCommand;
import io.streamthoughts.kafka.specs.command.acls.subcommands.internal.DescribeACLs;
import io.streamthoughts.kafka.specs.model.MetaObject;
import io.streamthoughts.kafka.specs.model.V1AccessPrincipalObject;
import io.streamthoughts.kafka.specs.model.V1SecurityObject;
import io.streamthoughts.kafka.specs.model.V1SpecFile;
import io.streamthoughts.kafka.specs.model.V1SpecsObject;
import org.apache.kafka.clients.admin.AdminClient;
import picocli.CommandLine;
import picocli.CommandLine.Command;
import picocli.CommandLine.Option;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.util.Collection;

@Command(name = "describe",
        description = "Describe all the ACLs that currently exist on remote cluster."
)
public class Describe extends BaseCommand {

    @Option(names = "--file-path",
            description = "The file path to write the description of Topics."
    )
    File filePath;

    /**
     * {@inheritDoc}
     */
    @Override
    public Integer call(final AdminClient client) {

        final AclRulesBuilder builder = getAclRulesBuilder(client);
        Collection rules = new DescribeACLs(client).describe();
        final Collection users = builder.toAclUserPolicy(rules);

        try {
            OutputStream os = (filePath != null) ? new FileOutputStream(filePath) : System.out;
            final V1SpecsObject specsObject = V1SpecsObject.withSecurity(new V1SecurityObject(users, null));
            YAMLClusterSpecWriter.instance().write(new V1SpecFile(MetaObject.defaults(), specsObject), os);
            return CommandLine.ExitCode.OK;
        } catch (FileNotFoundException e) {
            throw new RuntimeException(e);
        }
    }

    private AclRulesBuilder getAclRulesBuilder(final AdminClient client) {
        return AclRulesBuilder.combines(
                new LiteralAclRulesBuilder(),
                new TopicMatchingAclRulesBuilder(client));
    }
}