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/*
 * (c) Copyright 2018 Palantir Technologies Inc. All rights reserved.
 *
 * 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.palantir.atlasdb.containers;

import com.palantir.atlasdb.cassandra.CassandraCredentialsConfig;
import com.palantir.atlasdb.cassandra.CassandraKeyValueServiceConfig;
import com.palantir.atlasdb.cassandra.CassandraKeyValueServiceRuntimeConfig;
import com.palantir.atlasdb.cassandra.ImmutableCassandraCredentialsConfig;
import com.palantir.atlasdb.cassandra.ImmutableCassandraKeyValueServiceConfig;
import com.palantir.atlasdb.cassandra.ImmutableCassandraKeyValueServiceRuntimeConfig;
import com.palantir.atlasdb.cassandra.ImmutableCqlCapableConfig;
import com.palantir.atlasdb.keyvalue.cassandra.CassandraKeyValueServiceImpl;
import com.palantir.docker.compose.DockerComposeRule;
import com.palantir.docker.compose.connection.waiting.SuccessOrFailure;
import com.palantir.logsafe.logger.SafeLogger;
import com.palantir.logsafe.logger.SafeLoggerFactory;
import com.palantir.refreshable.Refreshable;
import java.net.InetSocketAddress;
import java.util.Map;

public class ThreeNodeCassandraCluster extends Container {
    private static final SafeLogger log = SafeLoggerFactory.get(ThreeNodeCassandraCluster.class);

    private static final CassandraVersion CASSANDRA_VERSION = CassandraVersion.fromEnvironment();

    public static final String CLI_CONTAINER_NAME = "cli";
    public static final String FIRST_CASSANDRA_CONTAINER_NAME = "cassandra1";
    public static final String SECOND_CASSANDRA_CONTAINER_NAME = "cassandra2";
    public static final String THIRD_CASSANDRA_CONTAINER_NAME = "cassandra3";
    private static final CassandraCredentialsConfig CREDENTIALS = ImmutableCassandraCredentialsConfig.builder()
            .username("username")
            .password("password")
            .build();

    private static final int DEFAULT_REPLICATION_FACTOR = 3;
    public static final CassandraKeyValueServiceConfig KVS_CONFIG = getKvsConfig();
    public static final Refreshable KVS_RUNTIME_CONFIG =
            getRuntimeConfig(DEFAULT_REPLICATION_FACTOR);

    public static CassandraKeyValueServiceConfig getKvsConfig() {
        return ImmutableCassandraKeyValueServiceConfig.builder()
                .poolSize(20)
                .keyspace("atlasdb")
                .ignoreNodeTopologyChecks(true)
                .autoRefreshNodes(false)
                .credentials(CREDENTIALS)
                .build();
    }

    @SuppressWarnings({"AddressSelection", "DnsLookup"})
    public static Refreshable getRuntimeConfig(int replicationFactor) {
        return Refreshable.only(ImmutableCassandraKeyValueServiceRuntimeConfig.builder()
                .servers(ImmutableCqlCapableConfig.builder()
                        .addThriftHosts(
                                new InetSocketAddress(
                                        FIRST_CASSANDRA_CONTAINER_NAME, CassandraContainer.CASSANDRA_THRIFT_PORT),
                                new InetSocketAddress(
                                        SECOND_CASSANDRA_CONTAINER_NAME, CassandraContainer.CASSANDRA_THRIFT_PORT),
                                new InetSocketAddress(
                                        THIRD_CASSANDRA_CONTAINER_NAME, CassandraContainer.CASSANDRA_THRIFT_PORT))
                        .addCqlHosts(
                                new InetSocketAddress(
                                        FIRST_CASSANDRA_CONTAINER_NAME, CassandraContainer.CASSANDRA_CQL_PORT),
                                new InetSocketAddress(
                                        SECOND_CASSANDRA_CONTAINER_NAME, CassandraContainer.CASSANDRA_CQL_PORT),
                                new InetSocketAddress(
                                        THIRD_CASSANDRA_CONTAINER_NAME, CassandraContainer.CASSANDRA_CQL_PORT))
                        .build())
                .mutationBatchCount(10000)
                .mutationBatchSizeBytes(10000000)
                .fetchBatchCount(1000)
                .replicationFactor(replicationFactor)
                .build());
    }

    @Override
    public String getDockerComposeFile() {
        return "/docker-compose-cassandra-three-node.yml";
    }

    @Override
    public Map getEnvironment() {
        return CassandraEnvironment.get();
    }

    @Override
    public SuccessOrFailure isReady(DockerComposeRule rule) {
        return SuccessOrFailure.onResultOf(() -> {
            try {
                return new ThreeNodeCassandraClusterOperations(rule, CASSANDRA_VERSION)
                                .nodetoolShowsThreeCassandraNodesUp()
                        && canCreateCassandraKeyValueService();

            } catch (Exception e) {
                log.info("Exception while checking if the Cassandra cluster was ready", e);
                return false;
            }
        });
    }

    private static boolean canCreateCassandraKeyValueService() {
        return CassandraKeyValueServiceImpl.createForTesting(KVS_CONFIG, KVS_RUNTIME_CONFIG)
                .isInitialized();
    }
}