高性能solr c#客户端EasyNet.Solr

王艳玲

　　EasyNet.Solr（http://easynet.codeplex.com）是由本人开发的 solr（http：//lucene.apache.org/solr）c#客户端。它具有以下特性：
　　
　　1.支持solr 3.1（不兼容solr 1.4.x）
　　2. 默认支持solr最高效的javabin协议

　　3.基于接口的序列化和反序列化协议，没有采用反射
　　4. 可以在架构基础上方便扩展处理solr支持的其他协议，如xml，json等等

　　
　　以下是基本的使用示例：


索引和检索用到的实体类 Indexing and retrieval of entity class used
public class Example
{
      public string Id { get; set; }
      public string Name { get; set; }
}
创建索引 Create index
序列化实现 Implement serialization
public class ExampleObjectSerializer : IObjectSerializer
{
      public IList Serializer(IEnumerable objs)
      {
          IList docs = new List();
          foreach (Example obj in objs)
          {
              SolrInputDocument doc = new SolrInputDocument();
              doc.Add("Id", new SolrInputField("id", obj.Id));
              doc.Add("name", new SolrInputField("name", obj.Name));
              docs.Add(doc);
           }
          return docs;
      }
}
索引 Index
ICodecFactory codecFactory = new BinaryCodecFactory();
ISolrConnection con = new SolrConnection("http://localhost:8088/solr");
IUpdateOperationParametersConvert updateOpParametersConvert = new BinaryUpdateOperationParametersConvert();
ISolrResponseParser responseHeaderParser = new BinaryResponseHeaderParser();
ISolrUpdateOperations updateOp = new SolrUpdateOperations(con, updateOpParametersConvert);
IList examples = new List();
examples.Add(new Example() { Id = "16", Name = "Terry" + DateTime.Now.ToLongTimeString() });
examples.Add(new Example() { Id = "18", Name = "Terry" + DateTime.Now.ToLongTimeString() });
examples.Add(new Example() { Id = "17", Name = "Terry" + DateTime.Now.ToLongTimeString() });
IObjectSerializer objectSerializer = new ExampleObjectSerializer();
IList docs = objectSerializer.Serializer(examples);
AddOptions? addOptions = new AddOptions() { CommitWithin = 10 };
CommitOptions? commitOptions = new CommitOptions() { WaitFlush = true, WaitSearcher = true };
OptimizeOptions? optimizeOptions = new OptimizeOptions() { WaitFlush = true, WaitSearcher = true };
NamedList addRes = updateOp.Add(docs, null, commitOptions, optimizeOptions);
ResponseHeader responseHeader = responseHeaderParser.Parser(addRes);
查询 Query
反序列实现 Implement deserialize
public class ExampleObjectDeserialize : IObjectDeserialize
{
      public IEnumerable Deserialize(SolrDocumentList result)
      {
          IList examples = new List();
          foreach (SolrDocument doc in result)
          {
              examples.Add(new Example() { Id = doc["id"].ToString(), Name = doc["name"].ToString() });
          }
          return examples;
      }
}
查询 Query
ISolrConnection con = new SolrConnection("http://localhost:8088/solr");
IObjectDeserialize objectDeserialize = new ExampleObjectDeserialize();
ISolrResponseParser qrp = new BinaryQueryResultsParser(objectDeserialize);
ISolrQueryOperations qop = new SolrQueryOperations(con);
NameValueCollection options = new NameValueCollection();
options.Add(CommonParams.START, "0");
options.Add(CommonParams.ROWS, "10");
NamedList res = qop.Query(SolrQuery.All, options);
QueryResults exps = qrp.Parser(res);