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Apache Solr (module: core)
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/*
 * 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 org.apache.solr.handler.admin.api;

import static org.apache.solr.client.solrj.SolrRequest.METHOD.POST;
import static org.apache.solr.common.params.CommonAdminParams.SPLIT_KEY;
import static org.apache.solr.common.params.CommonParams.PATH;
import static org.apache.solr.common.params.CoreAdminParams.TARGET_CORE;
import static org.apache.solr.handler.ClusterAPI.wrapParams;
import static org.apache.solr.security.PermissionNameProvider.Name.CORE_EDIT_PERM;

import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import org.apache.solr.api.Command;
import org.apache.solr.api.EndPoint;
import org.apache.solr.api.PayloadObj;
import org.apache.solr.common.annotation.JsonProperty;
import org.apache.solr.common.params.CoreAdminParams;
import org.apache.solr.common.util.ReflectMapWriter;
import org.apache.solr.handler.admin.CoreAdminHandler;

/**
 * V2 API for splitting a single core into multiple pieces
 *
 * The new API (POST /v2/cores/coreName {'split': {...}}) is equivalent to the v1
 * /admin/cores?action=split command.
 */
@EndPoint(
    path = {"/cores/{core}"},
    method = POST,
    permission = CORE_EDIT_PERM)
public class SplitCoreAPI {
  private static final String V2_SPLIT_CORE_CMD = "split";

  private final CoreAdminHandler coreHandler;

  public SplitCoreAPI(CoreAdminHandler coreHandler) {
    this.coreHandler = coreHandler;
  }

  @Command(name = V2_SPLIT_CORE_CMD)
  public void splitCore(PayloadObj obj) throws Exception {
    final SplitCorePayload v2Body = obj.get();
    final Map v1Params = v2Body.toMap(new HashMap<>());
    v1Params.put(
        CoreAdminParams.ACTION,
        CoreAdminParams.CoreAdminAction.SPLIT.name().toLowerCase(Locale.ROOT));
    v1Params.put(
        CoreAdminParams.CORE, obj.getRequest().getPathTemplateValues().get(CoreAdminParams.CORE));

    if (v2Body.path != null && !v2Body.path.isEmpty()) {
      v1Params.put(PATH, v2Body.path.toArray(new String[0]));
    }
    if (v2Body.targetCore != null && !v2Body.targetCore.isEmpty()) {
      v1Params.put(TARGET_CORE, v2Body.targetCore.toArray(new String[0]));
    }

    if (v2Body.splitKey != null) {
      v1Params.put(SPLIT_KEY, v1Params.remove("splitKey"));
    }

    coreHandler.handleRequestBody(wrapParams(obj.getRequest(), v1Params), obj.getResponse());
  }

  public static class SplitCorePayload implements ReflectMapWriter {
    @JsonProperty public List path;

    @JsonProperty public List targetCore;

    @JsonProperty public String splitKey;

    @JsonProperty public String splitMethod;

    @JsonProperty public Boolean getRanges;

    @JsonProperty public String ranges;

    @JsonProperty public String async;
  }
}