红帽全球峰会110.5. FreeMarker 上下文
Camel 将在 FreeMarker 上下文中提供交换信息（忽略 映射）。Exchange 的传输如下：
| key | value |
|---|---|
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| In 消息的标头。 |
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| Camel 上下文. |
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| In 消息。 |
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| In 消息正文。 |
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| Out 消息（仅适用于 InOut 消息交换模式）。 |
在 Camel 2.14 中，您可以使用键"CamelFreemarkerDataModel"在消息标头中设置自定义 FreeMarker 上下文"，就像这样一样
Map<String, Object> variableMap = new HashMap<String, Object>();
variableMap.put("headers", headersMap);
variableMap.put("body", "Monday");
variableMap.put("exchange", exchange);
exchange.getIn().setHeader("CamelFreemarkerDataModel", variableMap);
Map<String, Object> variableMap = new HashMap<String, Object>();
variableMap.put("headers", headersMap);
variableMap.put("body", "Monday");
variableMap.put("exchange", exchange);
exchange.getIn().setHeader("CamelFreemarkerDataModel", variableMap);
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