SolrCloud统计功能小记
因为需要在自己的搜索系统中增加一些统计分析的功能，而当前的数据及所有都是通过solrcloud本身存储，因此，必须使用solrcloud实现一些常见的统计功能。
下面介绍下自己使用solrcloud实现的几个统计小案例：
1、统计每个月存储的邮件数量:
实现代码：
QueryResponsequery = null;
CloudSolrServersolrcloud = EmailSolrCloudInstance.getInstance(ZkServerConfig.EmailCollection);
ModifiableSolrParamsparams = newModifiableSolrParams();
params.set("shards.tolerant", true);
SolrQueryfilterQuery = new SolrQuery("type:email");
filterQuery.setFacet(true);
filterQuery.setParam("facet.date", "timestamp");
filterQuery.setParam("facet.date.start", "2013-02-01T00:00:00Z");
filterQuery.setParam("facet.date.end", "2014-02-01T00:00:00Z");
filterQuery.setParam("facet.date.gap", "+1MONTH");
params.add(filterQuery);
query= solrcloud.query(params);
System.out.println("查询表达式:" +params.toString());
List<FacetField>facets = query.getFacetDates();
for (FacetField facet : facets) {
System.out.println(facet.getName());
System.out.println("----------------");
List<Count>counts = facet.getValues();
for (Count count : counts) {
System.out.println(count.getName() + ":" + count.getCount());
}
System.out.println();
}
2、统计聊天信息各类聊天信息的数量List<FacetField> facets = null;
try {
CloudSolrServersolrcloud = EMLSolrCloudInstance.getInstance(ZkServerConfig.IMCollection);
SolrQueryquery = new SolrQuery();//建立一个新的查询
query.setQuery("type:msn OR type:qq OR type:icq OR type:gtalk");
query.setFacet(true);//设置facet=on
query.addFacetField(new String[] { "type"});//设置需要facet的字段
query.setFacetLimit(10);//限制facet返回的数量
QueryResponseresponse = solrcloud.query(query);
facets = response.getFacetFields();//返回的facet列表
System.out.println(facets);
for(int i=0;i<facets.size();i++){
FacetField facetField = facets.get(i);
List<Count> countValue = facetField.getValues();
for(int j=0;j<countValue.size();j++){
Count count = countValue.get(i);
System.out.println("名称"+count.getName());
System.out.println("统计结果"+count.getCount());
}
}
3、统计每个分组中某个字段的和（比如统计淘宝每个月的交易量）QueryResponse query = null;
List<FieldStatsInfo>list = null;
try {
CloudSolrServersolrcloud = EMLSolrCloudInstance.getInstance(ZkServerConfig.BTAOBAOCollection);
ModifiableSolrParamsparams = newModifiableSolrParams();
params.set("shards.tolerant", true);
//SolrQuery filterQuery = newSolrQuery("type:ALIBI");
SolrQueryfilterQuery = newSolrQuery(queryStr);
filterQuery.setFacet(true);
//filterQuery.setParam("fq", "timestamp:[2013-02-01T00:00:00ZTO 2015-02-01T00:00:00Z]");
filterQuery.setParam("fq", fq);
filterQuery.setParam("stats", "on");
filterQuery.setParam("stats.field", "price");
filterQuery.setParam("stats.facet", "sendTime");
params.add(filterQuery);
query= solrcloud.query(params);
Map<String,FieldStatsInfo> info = query.getFieldStatsInfo();
FieldStatsInfoinfo2 = info.get("price");
Map<String,List<FieldStatsInfo>> facets = info2.getFacets();
list= facets.get("sendTime");
for(inti=0;i<list.size();i++){
FieldStatsInfofieldStatsInfo = list.get(i);
System.out.println("交易结果"+fieldStatsInfo.getName()+":"+fieldStatsInfo.getSum());
}