io.stargate.sgv2.graphql.schema.cqlfirst.ddl.fetchers.CreateKeyspaceFetcher Maven / Gradle / Ivy

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/*
 * Copyright The Stargate Authors
 *
 * 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 io.stargate.sgv2.graphql.schema.cqlfirst.ddl.fetchers;

import graphql.schema.DataFetchingEnvironment;
import io.stargate.bridge.proto.QueryOuterClass.Query;
import io.stargate.sgv2.common.cql.builder.QueryBuilder;
import io.stargate.sgv2.common.cql.builder.Replication;
import io.stargate.sgv2.graphql.web.resources.StargateGraphqlContext;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class CreateKeyspaceFetcher extends DdlQueryFetcher {

  @Override
  protected Query buildQuery(DataFetchingEnvironment environment, StargateGraphqlContext context) {
    String keyspaceName = environment.getArgument("name");

    boolean ifNotExists = environment.getArgumentOrDefault("ifNotExists", Boolean.FALSE);
    Integer replicas = environment.getArgument("replicas");
    List> datacenters = environment.getArgument("datacenters");
    if (replicas == null && datacenters == null) {
      throw new IllegalArgumentException("You must specify either replicas or datacenters");
    }
    if (replicas != null && datacenters != null) {
      throw new IllegalArgumentException("You can't specify both replicas and datacenters");
    }
    Replication replication =
        replicas != null
            ? Replication.simpleStrategy(replicas)
            : Replication.networkTopologyStrategy(parseDatacenters(datacenters));
    return new QueryBuilder()
        .create()
        .keyspace(keyspaceName)
        .ifNotExists(ifNotExists)
        .withReplication(replication)
        .build();
  }

  private Map parseDatacenters(List> datacenters) {
    assert datacenters != null; // already checked before calling this method
    if (datacenters.isEmpty()) {
      throw new IllegalArgumentException("datacenters must contain at least one element");
    }
    Map result = new HashMap<>();
    for (Map datacenter : datacenters) {
      String dcName = (String) datacenter.get("name");
      Integer dcReplicas = (Integer) datacenter.getOrDefault("replicas", 3);
      result.put(dcName, dcReplicas);
    }
    return result;
  }
}