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Concourse is a self-tuning database that is designed for both ad hoc analytics and high volume transactions at scale. Developers use Concourse to quickly build mission critical software while also benefiting from real time insight into their most important data. With Concourse, end-to-end data management requires no extra infrastructure, no prior configuration and no additional coding–all of which greatly reduce costs and allow developers to focus on core business problems.

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/*
 * Copyright (c) 2013-2019 Cinchapi Inc.
 *
 * 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.cinchapi.concourse;

import java.nio.ByteBuffer;
import java.util.List;

import com.cinchapi.common.io.ByteBuffers;
import com.cinchapi.concourse.thrift.ComplexTObject;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;

/**
 * The client-side interface for Concourse's management capabilities.
 *
 * @author jeff
 */
public class Manager {

    /**
     * The parent driver that contains the connection to thrift.
     */
    private final ConcourseThriftDriver concourse;

    /**
     * Construct a new instance.
     * 
     * @param concourse
     */
    Manager(Concourse concourse) {
        Preconditions.checkArgument(concourse instanceof ConcourseThriftDriver);
        this.concourse = (ConcourseThriftDriver) concourse;
    }

    /**
     * Create a user with the specified {@code username}, {@code password} and
     * {@code role}.
     * 
     * @param username
     * @param password
     * @param role
     */
    public void createUser(String username, String password, String role) {
        ByteBuffer uname = ByteBuffers.fromUtf8String(username);
        ByteBuffer pword = ByteBuffers.fromUtf8String(password);
        List params = ImmutableList.of(
                ComplexTObject.fromJavaObject(uname),
                ComplexTObject.fromJavaObject(pword),
                ComplexTObject.fromJavaObject(role));
        concourse.execute(() -> concourse.$core().invokeManagement("createUser",
                params, concourse.creds()));
    }

    /**
     * Grant the {@code permission} to the user with {@code username} in the
     * default environment.
     * 
     * @param username
     * @param permission
     */
    public final void grant(String username, String permission) {
        grant(username, permission, "");
    }

    /**
     * Grant the {@code permission} to the user with {@code username} in the
     * specified {@code environment}.
     * 
     * @param username
     * @param permission
     * @param environment
     */
    public void grant(String username, String permission, String environment) {
        ByteBuffer uname = ByteBuffers.fromUtf8String(username);
        List params = ImmutableList.of(
                ComplexTObject.fromJavaObject(uname),
                ComplexTObject.fromJavaObject(permission),
                ComplexTObject.fromJavaObject(environment));
        concourse.execute(() -> concourse.$core().invokeManagement("grant",
                params, concourse.creds()));
    }

}