再谈compass----集成站内搜索
2009-09-21 00:00:00 来源:WEB开发网4.建立索引Service 层代码
Java代码
@Service
@Transactional
public class SearchServiceBean extends DaoSupport implements SearchService {
@Resource(name = "compass")
Compass compass;
/** 创建索引 **/
public void index(ProductInfo p) {
CompassSession session = compass.openSession();
CompassTransaction tx = null;
try {
tx = session.beginTransaction();
session.create(p);
tx.commit();
} catch (Exception e) {
if (tx != null) {
tx.commit();
}
throw new RuntimeException(e);
} finally {
if (session != null) {
session.close();
}
}
}
/** 删除一条索引 **/
public void delete(ProductInfo p) {
CompassTemplate ct = new CompassTemplate(compass);
ct.delete(p);
}
/** 更新(重新创建)一条索引 **/
public void update(final ProductInfo p) {
CompassTemplate ct = new CompassTemplate(compass);
CompassCallback<Object> action = new CompassCallback<Object>() {
public Object doInCompass(CompassSession session)
throws CompassException {
session.delete(p);
session.create(p);
return null;
}
};
ct.execute(action);
}
/** 索引查询 **/
public List<ProductInfo> find(final String keywords) {
CompassTemplate ct = new CompassTemplate(compass);
return ct.execute(new CompassCallback<List<ProductInfo>>() {
public List<ProductInfo> doInCompass(CompassSession session)
throws CompassException {
List<ProductInfo> result = new ArrayList<ProductInfo>();
CompassQueryBuilder queryBuilder = session.queryBuilder();
CompassHits hits = null; // session.find(query);
/** 在所有字段中查询 **/
CompassQuery allPropertyQuery = queryBuilder.queryString(keywords).toQuery();
hits = allPropertyQuery.hits();
/** 在指定字段中查询 **/
// CompassQuery query = queryBuilder.term("name", keywords);
// hits = query.hits();
/** 指定范围查询 **/
// CompassQuery dateRangeQuery =
// queryBuilder.between("postTime",startTime, endTime, true);
// hits = queryBuilder.bool()
// .addMust(allPropertyQuery)
// .addMust(dateRangeQuery)
// .toQuery()
// .hits();
// System.out.println("---------");
for (int i = 0; i < hits.length(); i++) {
ProductInfo p = (ProductInfo) hits.data(i);
/** 如果进行高亮的属性中没有出现关键字, 则返回null **/
// String ht = hits.highlighter(i).fragment("name");
// if (ht != null) {
// p.setName(ht);
// }
// String hc = hits.highlighter(i).fragment("code");
// if (hc != null) {
// p.setCode(hc);
// }
result.add(p);
}
return result;
}
});
}
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