我正在开发一个简单的处理器来验证路由中是否存在强制属性。 我需要在调用处理器之前在路由定义中添加该列表。
<route id="test1">
<from uri="/v1/test1" />
<setProperty propertyName="mandatoryProperties">
<simple resultType="java.util.List">${[A,B,C]}</simple>
</setProperty>
<bean ref="propertiesProcessor" />
</route>
我的处理器是:
@Component
public class MandatoryPropertiesProcessor {
@Handler
public void process(final Exchange exchange, final @Properties Map properties, final @ExchangeProperty("mandatoryProperties") List<String> mandatoryProperties) {
List<String> missingPropertiesList = new ArrayList<>();
if (!CollectionUtils.isEmpty(mandatoryProperties)) {
for (String mandatoryProperty : mandatoryProperties) {
if (!properties.containsKey(mandatoryProperty)) {
missingPropertiesList.add(mandatoryProperty);
}
}
}
exchange.setProperty(MISSING_PROPERTIES, missingPropertiesList);
}
}
当我尝试拨打这条路线时,我得到:
Caused by: org.apache.camel.language.simple.types.SimpleParserException: Unknown function: ["A","B","C"]
at org.apache.camel.language.simple.ast.SimpleFunctionExpression.createSimpleExpression(SimpleFunctionExpression.java:216)
at org.apache.camel.language.simple.ast.SimpleFunctionExpression.createExpression(SimpleFunctionExpression.java:40)
at org.apache.camel.language.simple.ast.SimpleFunctionStart.doCreateLiteralExpression(SimpleFunctionStart.java:58)
at org.apache.camel.language.simple.ast.SimpleFunctionStart.createExpression(SimpleFunctionStart.java:48)
at org.apache.camel.language.simple.SimpleExpressionParser.createExpressions(SimpleExpressionParser.java:163)
at org.apache.camel.language.simple.SimpleExpressionParser.doParseExpression(SimpleExpressionParser.java:86)
at org.apache.camel.language.simple.SimpleExpressionParser.parseExpression(SimpleExpressionParser.java:53)
可以用XML实现吗?
答案 0 :(得分:0)
您似乎使用Spring Framework,强制属性似乎是一个静态列表,对吧?
如果是这样,只需使用Spring配置创建列表或任何其他必需属性集合,并将其注入MandatoryPropertiesProcessor
bean。这部分根本没有骆驼。
如果列表发生变化,只会更改配置和bean,但不会更改Camel路由。这是合理的,因为通过您的路线实施的“处理工作流程”不会改变。