红帽全球峰会360.2.2. 查询参数(5 参数)：
| 名称 | 描述 | 默认 | 类型 |
|---|---|---|---|
| contentCache (producer) | 设置是否使用资源内容缓存 | false | 布尔值 |
| encoding (producer) | 资源内容的字符编码。 | 字符串 | |
| loaderCache (producer) | 启用/禁用默认启用的 velocity 资源加载程序缓存 | true | 布尔值 |
| propertiesFile (producer) | 用于 VelocityEngine 初始化的属性文件的 URI。 | 字符串 | |
| 同步 （高级） | 设置同步处理是否应当严格使用，还是允许 Camel 使用异步处理（如果受支持）。 | false | 布尔值 |
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