Question

我无法更改映射。任何人都可以帮我找到我的代码中的错误吗？
我已经找到了这种标准方法来根据几个教程更改映射。但是当我尝试调用映射结构时，在创建manuall映射后只会出现一个空白的映射结构但是在插入一些数据之后会出现映射规范，因为ES当然是默认的。更具体地说，请参阅下面的代码。

public class ElasticTest {
private String dbname = "ElasticSearch";
private String index = "indextest";
private String type = "table";
private Client client = null;
private Node node = null;

public ElasticTest(){
    this.node = nodeBuilder().local(true).node();
    this.client = node.client();

    if(isIndexExist(index)){
        deleteIndex(this.client, index);
        createIndex(index);
    }
    else{
        createIndex(index);
    }

    System.out.println("mapping structure before data insertion");
    getMappings();
    System.out.println("----------------------------------------");
    createData();
    System.out.println("mapping structure after data insertion");
    getMappings();



}

public void getMappings() {
    ClusterState clusterState = client.admin().cluster().prepareState()
            .setFilterIndices(index).execute().actionGet().getState();
    IndexMetaData inMetaData = clusterState.getMetaData().index(index);
    MappingMetaData metad = inMetaData.mapping(type);

    if (metad != null) {
        try {
            String structure = metad.getSourceAsMap().toString();
            System.out.println(structure);

        } catch (IOException e) {
            e.printStackTrace();
        }
    }

}

private void createIndex(String index) {
    XContentBuilder typemapping = buildJsonMappings();
    String mappingstring = null;
    try {
        mappingstring = buildJsonMappings().string();
    } catch (IOException e1) {
        e1.printStackTrace();
    }

    client.admin().indices().create(new CreateIndexRequest(index)
                  .mapping(type, typemapping)).actionGet();

    //try put mapping after index creation
    /*
     * PutMappingResponse response = null; try { response =
     * client.admin().indices() .preparePutMapping(index) .setType(type)
     * .setSource(typemapping.string()) .execute().actionGet(); } catch
     * (ElasticSearchException e) { e.printStackTrace(); } catch
     * (IOException e) { e.printStackTrace(); }
     */

}

private void deleteIndex(Client client, String index) {
    try {
        DeleteIndexResponse delete = client.admin().indices()
                .delete(new DeleteIndexRequest(index)).actionGet();
        if (!delete.isAcknowledged()) {
        } else {
        }
    } catch (Exception e) {
    }
}

private XContentBuilder buildJsonMappings(){
    XContentBuilder builder = null; 
    try {
        builder = XContentFactory.jsonBuilder();
        builder.startObject()
        .startObject("properties")
            .startObject("ATTR1")
                .field("type", "string")
                .field("store", "yes")
                .field("index", "analyzed")
             .endObject()
           .endObject()
        .endObject();           
    } catch (IOException e) {
        e.printStackTrace();
    }
    return builder;
}

private boolean isIndexExist(String index) {
    ActionFuture<IndicesExistsResponse> exists = client.admin().indices()
            .exists(new IndicesExistsRequest(index));
    IndicesExistsResponse actionGet = exists.actionGet();

    return actionGet.isExists();
}

private void createData(){
    System.out.println("Data creation");
    IndexResponse response=null;
    for (int i=0;i<10;i++){
        Map<String, Object> json = new HashMap<String, Object>();
        json.put("ATTR1", "new value" + i);
        response = this.client.prepareIndex(index, type)
                .setSource(json)
                .setOperationThreaded(false)
                .execute()
                .actionGet();
    }
    String _index = response.getIndex();
    String _type = response.getType();
    long _version = response.getVersion();
    System.out.println("Index : "+_index+"   Type : "+_type+"   Version : "+_version);
    System.out.println("----------------------------------");
}

public static void main(String[] args)
{
    new ElasticTest();
}
}

我只想更改ATTR1字段的属性进行分析以确保快速查询。我做错了什么？我还尝试在创建索引后创建映射，但它会导致相同的影响。

Answer 1

好的，我自己找到了答案。在类型级别，我必须用类型名称包装“属性”。 E.g：

“type1”：{ “properties”：{ ..... } }

请参阅以下代码：

private XContentBuilder getMappingsByJson(){
    XContentBuilder builder = null;
    try {
        builder = XContentFactory.jsonBuilder().startObject().startObject(type).startObject("properties");
        for(int i = 1; i<5; i++){
            builder.startObject("ATTR" + i)
                    .field("type", "integer")
                    .field("store", "yes")
                    .field("index", "analyzed")
                    .endObject();
            }
            builder.endObject().endObject().endObject();
        }
        catch (IOException e) {
            e.printStackTrace();
        }
    return builder;
}

它为属性ATTR1-ATTR4创建映射。现在可以动态地为Example定义不同属性的列表。希望它可以帮助别人。

Elasticsearch：使用Java添加手动映射

1 个答案: