红帽全球峰会227.6.2.3. update
更新集合中的一个或多个记录。需要 List<DBObject> 作为 IN 消息正文，该正文正好包含 2 个元素：
- 元素 1 (index 0) PromQL 过滤器查询 TOKEN 决定哪些对象会受到影响，与典型的查询对象相同
- 元素 2 (index 1)• 更新规则 WWN 如何更新匹配的对象。支持 MongoDB 中的所有 修饰符操作。
Multiupdates .默认情况下，即使多个对象与过滤器查询匹配，MongoDB 也会更新 1 对象。要指示 MongoDB 更新所有 匹配记录，请将 CamelMongoDbMultiUpdate IN 消息标头设置为 true。
将返回一个带有键 CamelMongoDbRecordsAffected 的标头(MgoDbConstants.RECORDS_AFFECTED constant)以及更新的记录数（从 WriteResult.getN （）中结束）。
支持以下 IN 消息标头：
| 标头密钥 | 快速持续 | 描述（从 MongoDB API doc中提取） | 预期类型 |
|---|---|---|---|
|
|
| 如果更新应应用到匹配的所有对象。请查看 http://www.mongodb.org/display/DOCS/Atomic+Operations | 布尔值/Boolean |
|
|
| 如果数据库不存在，则应创建这个元素 | 布尔值/Boolean |
例如，以下命令将"科学家"字段的值设置为 "Darwin"，来更新其 filterField 字段等于 true 的所有记录：
// route: from("direct:update").to("mongodb:myDb?database=science&collection=notableScientists&operation=update");
DBObject filterField = new BasicDBObject("filterField", true);
DBObject updateObj = new BasicDBObject("$set", new BasicDBObject("scientist", "Darwin"));
Object result = template.requestBodyAndHeader("direct:update", new Object[] {filterField, updateObj}, MongoDbConstants.MULTIUPDATE, true);
// route: from("direct:update").to("mongodb:myDb?database=science&collection=notableScientists&operation=update");
DBObject filterField = new BasicDBObject("filterField", true);
DBObject updateObj = new BasicDBObject("$set", new BasicDBObject("scientist", "Darwin"));
Object result = template.requestBodyAndHeader("direct:update", new Object[] {filterField, updateObj}, MongoDbConstants.MULTIUPDATE, true);
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